Date:: 27 Julyy 20
015
V
Venu
ue: R
RIKEEN C
Coopperaation Ce
ente
er 3FF me
eeting room
r m
Tim
me
9.0
00 – 9.3
30 am
9.30 – 9.3
35 am
9.35 – 9.4
40 am
9.4
40 – 100.10 ammRemarkss

Prograammee
Registtrationn
Openiing Speeech ffrom K
KNU, Prof. Inn-Kyu Kang
Openiing Speeech ffrom R
RIKEN, Dr. Yooshihiro Ito
RIKEN
N: Dr. K
Kazuo Takim
miya

5 min
m
5 min
m
30 minMolecuular andd Macrromoleccular Approacch to Orrganic ElectroEnics: New
Heterooaromatic Building Bllocks fo
or Optoo/Electrronic MaterialMs10.10 – 1
10.40 aam

30 minKNU : Prof. YounggKyoo Kim
Applicaations oof Orgaanic Field-Effecct Transistors and Fu
uture Approacches in Flexiblee
Electroonics Erra

10.40 – 1
11.10 aam

30 minRIKEN
N : Dr. Masukki Kaw
wamottoAqueous Proccessing for Pho
otoelecctric Co
onversioon Matterials

11.10 – 1
11.25 aam

15 minKNU: Mr. Jaaehoon
n Jeonng
Organic Photoodetecttors forr Sensin
ng UV aand Visible Ligghts: Invverted Devicee
Structuures witth Metal Oxide Nanoolayers

11.25 – 1
11.40 aam

15 minKNU: Ms. Su
unju H
HwanggGold Nanofibeer Netw
works ffor Streetchablee Electrronics

11.40 – 1
1.00 pmm
1.0
00 – 1.3
30 pm
m

Lunch Breakk
RIKEN
N : Dr. Hye Ryung B
Byon

30 minUndersstandin
ng of Litthium-O
Oxygenn Electrochemistry Foor Lithiu
um-Oxyygen Baatteriess

1.30 – 2.0
00 pmm

KNU : Prof. In Wo
oo Cheeong

30 minPreparation oof Januss Particles by D
Droplett Microofluidicss

2.0
00 – 2.3
30 pm
m

RIKEN
N: Dr. Y
Yousooo Kim

30 minSingle-Molecu
ule Cheemistry and Sp
pectroscopy withw STM
M

2.30 – 2.4
45 pmm

KNU : Ms. EEunjun
ng Kang

15 minNear-R
Room Temperaature SSynthessis of Co
ore/Sheell Strucctured Quantu
um Dotts

2.4
45 – 3.000 pm
m

KNU : Ms. M
Mi-Ri KKim

15 minPreparation oof Photo
o and TTemperrature R
Responsive Po
olymeric Vesiccles Con
ntainingg
Spironaaphtho
oxazine Via W//O/W D
Double Emulsion

3.0
00 – 3.330 pmm
3.30 – 4.0
00 pm
m

Tea Brreak
RIKEN
N : Dr. Motokki Uedda

30 minPhase-Separaated Mo
olecular Assem
mblies ffrom Amphiph
hilic Polypeptiides Haaving
Helical Hyadro
ophobiic Blockk

4.0
00 – 4.1
15 pm
m

KNU : Mr. K
Kyubae Lee

15 minDetection of A
Antigenn From Humann Plasm
ma Solution byy Functiionalize
ed Liquid
Crystal Dropleets

4.1
15 – 4.3
30 pm
m

RIKEN
N : Ms. Tran Thoa Thi Th
hanh
Aptamer -bassed seleective eelectronn transffer fromm photo-excited statte of Ruu(bpy)3

4.30 – 4.4
45 pm
m

15 min22+

KNU : Mr. SSang Hun Leee

15 minApplicaation off the Fu
uoss-Kirkwood
d Relatiion to Inferrin
ng Relaxxation TimeT
Sp
pectrumm

4.4
45 – 5.0
00 pm
m

RIKEN
N : Ms. Shinhhye Paark

15 minIn Vitroo Selecttion of Collageen-Bind
ding Vascular Endoth
helial Growth Factor

5.0
00 – 5.3
30 pm
m

KNU : Prof. Inn-Kyyu Kanng

30 minIn-Vitroo Detecction off Canceer Cells Using LLigand--Anchored Liquid Cryystal
Microddropletss

5.30 – 5.3
35 pm
m

Closinng Rem
marks

5 min
m

Moolecular and Macroomoleculaar Approach to Org
ganic Elecctronics: New
N
Heteroaaromatic Building
B
B
Blocks forr Opto/Eleectronic M
Materials
Kazuo Taakimiya, Maasahiro Nak
kano, and Itaru Osaka
Emergent M
Molecular Function
F
Research Grou
up, RIKEN Center for Emergent M
Matter Scien
nce (CEMS)),
Wako, Saiitama, 351-0
0198 Japan

ABSTRAACT
The field oof organic electronicsehas
h emergedd as a poten
ntial technology enabliing to realizze low cost,,
ubiquitous, and soft electronics
eapplicationsas. One of th
he key mateerials in thee technology
y is organicc
semiconduuctors that act
a as the acctive materiial in the ellectronic deevices such as organic field-effectt
transistors (OFETs) annd organic photovoltaiic cells (OPPVs). Our reesearch grouup has tried
d to developp
ng small mmolecular- anda conjugaated polym
mer-based materials.
m
Innorganic seemiconductoors includin
particular, we have focused ono fused-heeterarene structures asa the key building unit. Suchhheteroarenesaare[1]benzothieeno[3,2-b][11]benzothiophene(BTBT)[1],,

dinaphtho[[2,3-b:2',3'-ff]thieno[3,22-b]thiophenne (DNTT)) [2], isomeeric naphthoodithiophen
nes (NDTs))[3], anthraa[2,3-b:6,7--b']dichalcogenopheness (ADXs) [4], benzoo[1,2-b:4,5-bb']dichalcog
genopheness(BDXs) [55], naphthoo[1,2-c:5,6--c']bis[1,2,55]thiadiazolee (NTz) [6]. These heteroarennes can bee
efficiently synthesizedd and modiified to affoord superiorr molecularr semiconduuctors, or in
ncorporateddde new sem
miconductinng polymerrs. In this ppresentationn, syntheticc
into conjugated chainns to provid
heir devicee
chemistry and desiggn strategy of these materials are discusssed togethher with thcharacterisstics.

References[1] Ebata, H
H. et al. J. Am
m. Chem. So
oc. 2007, 1299, 15732. [2] Yamamoto,, T.; Takimiyya, K. J. Am.. Chem. Soc..
2007, 129, 2224. [3] Shhinamura, S. et al. J. Am
m. Chem. Socc. 2011, 133, 5024. [4] N
Nakano, M. ete al. J. Org.
Chem. 20122, 77, 8099. [5] Takimiyaa, K. et al. JJ. Am. Chem.. Soc. 2004, 126, 5084. [[6] Osaka, I. et al. J. Am.
Chem. Soc. 2012, 134, 3498.
3
Short BIO
OGRAPHY
E-mail: takim
miya@riken.jjp Tel: FAX: +81-48-462-14+
473
Ph.D. Hirosh
hima Universiity, 1994
JSPS Researrch Fellow forr Young Scien
ntist (1994)
Research Asssociate, Hirosshima Univerrsity (1994)
Visiting Ressearcher at Oddense University, Denmark (1997-1998)
Associate Prrofessor, Hirooshima Univerrsity (2003)
Professor, Hiroshima
H
Uniiversity (2007)
Group Direcctor at RIKENN CEMS (20133-)

APPLICATIONS OF ORGANIC FIELD-EFFECT TRANSISTORS AND
FUTURE APPROACHES IN FLEXIBLE ELECTRONICS ERA
Jooyeok Seo, Hyemi Han, Jaehoon Jeong, Sungho Nam, Hwajeong Kim and Youngkyoo Kim*
School of Applied Chemical Engineering, Graduate School, Kyungpook National University
Daegu 702-701, Korea

ABSTRACT
Organic electronic devices have attracted keen interest because of their huge potentials for next
generation electronic device applications. Organic light-emitting devices (OLEDs), which are thefirst commercialized example of organic electronic devices, are now in market for smart phones andTV sets. Recently, organic solar cells (OSCs) have been intensively studied by various researchgroups and companies, because the power conversion efficiency of OSCs has reached 9~11% sothat their commercialization can be positively anticipated though one condition is left on thestability of OSCs. Organic field-effect transistors (OFETs) have been also widely studied for morethan two decades and their performances are being improved to catch conventional FETs. However,the charge carrier mobility of organic semiconducting materials is still far lower than that ofinorganic semiconducting materials. This discourages applications of OFETs toward display
backplanes and/or memory devices. This presentation will introduce a couple of our efforts for
OFETs in terms of applications, such as photodetectors, memory devices, artificial skins etc., inorder to find their practical applications through a trade-off between drawbacks in performances
and advantages in functions.

Short BIOGRAPHY
E-mail: ykimm@knu.ac.kr, Tel: +82-950-5616, Mobile: 010-3353-0172
B.S. Polymer Science & Engineering, Pusan National University (1991)
M.S. Polymer Science & Engineering, Pusan National University (1993)
Ph.D. Polymer Science & Engineering, Pusan National University (1996)
Ph.D. Physics (Organic Electronics), Imperial College London (2006)
Associate Professor, Department of Chemical Engineering, Kyungpook National University(2007-present)
Principal Researcher, LG R&D Center (2006) / Consultant, Samsung Display (2011-2013)

AQUEOUS PROCESPSSING FOOR PHOTTOELECT
TRIC COONVERSIIONMAATERIA
ALS
Massuki Kawam
moto
Emergent Bioengineerring Materiials Researcch Team, RIKEN
R
Cennter for Em
mergent Mattter Sciencee(CEMS) annd Nano Meedical Engin
neering Labooratory, RIK
KEN, 2-1 Hirosawa, Waako, Saitam
ma 351-0198,,
Japan

ABSTRA
ACT
Single-w
walled carboon nanotubees (SWCNTTs) have beeen attractiv
ve for optoeelectronic ap
pplications;;

their extreeme electriical properties are off great intterest for carbon-baseced devices. However,,
SWCNTs form bundlles owing too van der W
Waals interaactions and result in pooor solubiliity. When asmall amoount of thee dispersantts such as surfactantss, polymers, DNA, prroteins, or peptides iss
attached too SWCNTss, well-disp
persed soluttions are ob
btained eveen in waterr. Unfortun
nately, mostt
dispersantss hinder the transport ofo electrons,, because off their electrrically insullating propeerties.
We devveloped a novel methodologyy for solu
ubilizing SWCNTs uusing semiiconductingg
nanoparticles in waterr. The aqueeous-proces sed direct assemblyaoff electron-trransporting (n) methyll[6,6]-phenyyl-C61-butyyrate (PCBM
M) nanopaarticles andd SWCNTs was essenntially unchhanged forr
several moonths in waater withoutt surfactantts. The PCB
BM nanopaarticles of 330 nm diammeters weree
attached too the surfaace of SWC
CNTs owinng to carbo
on-based π--π interactioon. After ana aqueouss
solution off hole-transsporting (p)) water-soluuble polyth
hiophene (WWSPT) wass added to the PCBM
M
nanoparticle-SWCNT
T dispersedd solution, coassemblled p/n heeterojunctioons of WS
SPT-PCBMM
WCNTs waas producedd. We also demonstrated that excciton generaation at p/nn
nanoparticles onto SW
t transferr of electroons were observedoin the ternarry nanocom
mposites onn
heterojuncttions and thepicosecondd timescales. Furtherm
more, the teernary nano
ocomposite films exhibbited the phhotocurrentt
response uupon photooirradiation of an air mass 1.5. The aqueoous-processeed direct assemblyaiss
expected too be applicaable to wateer-processabble fabricatiion for energy conversiion devices..
Short BIO
OGRAPHY
E-mail: mkaawamot@rienn.jp, Tel: +81--48-467-2752.
B. Sc. Himeeji Institute off Technology, 1997
Dr. Eng. To
okyo Institute of Technolog
gy, 2003
Postdoctoraal Fellow, Univ
iversity of Rocchester, (2003
3-2004)
Research Sccientist, RIKE
EN (2004-2010
0)Senior Reseearch Scientistt, RIKEN (2010-)
Senior Reseearch Scientistt, RIKEN CEM
MS (2013-)
Visiting Asssociate Professsor, Tokyo University
Uof Science (2013--)

ORGANIC PHOTODETECTORS FOR SENSING UV AND VISIBLE LIGHTS:
INVERTED DEVICE STRUCTURES WITH METAL OXIDE NANOLAYERS
Jaehoon Jeong, Jooyeok Seo, Chulyeon Lee, Myeonghun Song, Sooyong Lee,
Hyemi Han, Eunjoo Kwak, Hwajeong Kim and Youngkyoo Kim*
School of Applied Chemical Engineering, Graduate School, Kyungpook National University
Daegu 702-701, Korea

ABSTRACT
Detectors have been extensively developed for various applications in precision measurements
and/or camera applications for our daily life. Most of recent mobile electronic systems, including
smart phones and smart pads, have a tendency to employ high-resolution/high-definition camerasthat are typically fabricated with inorganic semiconductors. In particular, brand-new
flexible/bendable electronic systems need flexible camera systems in order to comply with the trend
toward full-flexible electronics era. However, conventional inorganic semiconductors cannot meetsuch flexibility owing to their intrinsic rigid property even though the minimum bendability can beachieved by sophisticated design/fabrication processes. In this regard, organic photodetectors(OPDs) have been spotlighted because of their benefits to deliver such flexibility when flexible
plastic films are accompanied together with organic semiconductors. Of various device types, a
diode-type OPD is considered most cost-effective because of its simple structure and fabrication
processes that enable large-area OPD production. Recently, we have concentrated on developing an
inverted-type device for OPDs and organic solar cells. In particular, our interest has reached sensing
of UV light by employing metal oxide buffer layers and conjugated polymer channel layers. In thispresentation, we will show the optoelectronic properties of inverted-type OPDs and discuss themechanism behind the measured performances.

Short BIOGRAPHY
E-mail: jh-jeong@knu.ac.kr, Tel: +82-944-5616, C.P.: 010-8949-7950
B.S. Chemical Engineering, Kyungpook National University (2009)
M.S. School of Applied Chemical Engineering, Kyungpook National University (2013)
Ph.D. Student, School of Applied Chemical Engineering, Kyungpook National University(2013-present)Goldd Nanofibber Netwoorks for StretchabSle Electroonics
Sunju Hwanng and Soo-H
Hwan Jeongg*
School oof Applied Chemical
CEn
ngineering, Major in Ch
hemical Eng
gineering, K
Kyungpook National
N
Universsity, 80, Daeehak-ro, Bukk-gu, Daeguu, Korea

ABSTRA
ACT
Flexible, w
wearable, andastretchhable electrronics reveal great pootential forr the next generationn
electronicss due to its
i promising applicaations in manymareass where deevices unddergo largee
deformatioon. Thereforre, many kiinds of matterials, suchh as carbon nanotubes,, graphene, conductiveepolymers, and metal, have been extensiveely studied
d to endow them withh high flex
xibility andd
stretchabiliity. Amongg these mateerials, metall-based netw
work has provided exceellent condu
uctivity andd
its structurre presents relativelyr
goood robustnness under bothbbendingg and stretchhing situations.
Generally, two methoods have beeen proposeed to preparre metal network for tthese purpo
oses. One iss
coating disspersed mettal nanowirees on a streetchable pollymeric sub
bstrate. In thhis case, ran
ndom metall
network iss formed. AlthoughAthiis approachh is very sim
mple, one ofo the drawbbacks is thee numerouss
junctions bbetween individual metal nanow
wires, resulting in highh electrical resistance. The otherr
alternative route is paatterning th
he metal thiin films or deposition of a metal film onto a template..
Unlike thee coating method, one body metall network (mesh)(is fo
ormed with avoiding wire-to-wirewejunction problem. Ass a result, it shows vvery good electricale
conductivityy due to ju
unction freee
structure. H
However, whenw
tensilee strain app lies, stress concentratees on their iinterconnect section off
the wires, w
which show
ws restricted
d stretchabliility.
The aforem
mentioned disadvantagdges of these processes, such as hig
gh junction resistance and limitedd
stretchabiliity, could beb solved byy using elecctrospinningg the polym
meric fibers and subseq
quent metall
deposition on electrrospun fibeers to formm metallized nanofib
ber networkk. Electrosspinning iss
consideredd to be a facilef
way to obtain continuouss and ultraalong nanoffiber. Extreemely longg
geometriess of electroospun nanofiber minim
mize the nu
umber of ju
unctions. FFurthermoree, nanofiberr
network aaccommodattes externaal strain thrrough rearrrangement of fibers, thus enhan
ncing moree
stretchabiliity than thatt of one bod
dy network..
In this sem
minar, activvities of ourr laboratoryy regarding the above mentioned topic will beb focused..
Two strucctural apprroaches hav
ve been sstudied to achieve high stretchhability of metallizedd
electrospunn nanofiberr network. First, wavyy structure can be obttained by ttransferring metallizedd
nanofiber nnetwork onnto prestrain
ned elastom
meric substraate and releasing prestrrained substrate. Uponn
stretching, the wavy structure accommodaates the sttrain by strraightening.. Second approachaisspatterning the metallizzed nanofib
ber networkk to form doouble netwo
orks. In douuble networrks, lines offlarge netw
work consist of nanofiibers. Strucctural reorieentation of nanofiber network withw
appliedd
strains trannsforms shaape of smalll network annd then it contributesctot shape chaange of largge network..
It is expectted that these structuree changes leead to betterr stretchabillity than jusst metallized nanofiberr
network.
Short BIO
OGRAPHY
E-mail: sunjju794@knu.acc.kr, Tel: +82--53-950-5615, C.P.: 010-28882-0875
B.S: Departm
ment of Chem
mical Engineerring, Faculty ofo Engineeringg, Kyungpook
k National
University (2015)
M.S Candid
date: School off Applied Cheemical Engineeering, Kyungp
gpook Nationaal University(2015-)

UNDERSTANDING OF LITHIUM-OXYGEN ELECTROCHEMISTRY FOR
LITHIUM-OXYGEN BATTERIESHye Ryung Byon*
Byon Initiative Research Unit, RIKEN, Wakoshi, Saitama 351-0198, Japan

ABSTRACT
A high demand for the future energy storage applications in electric vehicles (EVs) and grid
storage has been driving rapid growth of battery research. In particular, as the current battery
technology has almost reached its performance limitation, new battery systems have been
extensively investigated to achieve higher energy density. In this context, a lithium-oxygen (Li–O2)
battery has held promise on account for high theoretical energy density (over 3 kWh/kg). However,its development progress has been slow and left the Li–O2 battery still in the demonstration level
due to poor cycling stability and high cathodic polarization. To mitigate these performancedegradations, the scientific scrutiny to understand true electrochemical reactions in the Li−O2
batteries in conjunction with alleviation of parasitic side reactions has been urgently needed.
In this seminar, I present recent research progress of Li−O2 batteries at Byon IRU. We observe
Li–O2 electrochemical reaction (2Li+ + O2(g) + 2e– ↔ Li2O2(s)) and evaluate the reaction efficiency
using in situ analytical tools. These fundamental studies provide the evidence of dynamic Li2O2
formation and decomposition, accompanied by parasitic side reactions. Based on the insights
obtained from these approaches, we can improve the Li–O2 cell performance via engineering of
Li2O2 structure and eliminating of side products. The promising metal oxide catalysts incorporated
into carbon nanotube cathode promote smooth decomposition of Li2O2 and side products during
charge, which greatly lower charge potential and enhance cycling performance, respectively.

Short BIOGRAPHY
Hye Ryung Byon
E-mail: hrbyon@riken.jp, Tel: +81-48-467-9265
B.S. Chemistry, Sookmyung Women’s University, 2002
Ph.D. Chemistry, POSTECH, 2008
Initiative Research Scientist, Byon Initiative Research Unit, RIKEN (2011- )Adjunct Associate Professor, Tokyo Institute of Technology (2014-)

Prepaaration off Janus P
Particles byb Droplett Microflu
uidics
In WooW Cheonng,* Mi Ri Kim,
Kand Rubal
School of A
Applied Chemical Engin
neering, Graaduate Schoool, Kyungpo
ook Nationaal Universityy
Daeggu 702-701, Korea
K

ABSTRAACT
In the receent past, Jannus particless of two diffferent surfaace chemistry or polariity have attrracted greattattention ddue to their great potential in appliications, succh as contro
olled self-asssembly, drrug deliveryy
systems, electrical inkks, rheologiical studiess, paints andd coating. For
F this, vaarious technniques havee
been develloped, like 2-dimensio
onal direct ddeposition, phase sepaaration, conntrolled coalescence off
two distincct droplets followed byb solidificaation, hydroodynamics, template-ddirected self-assembly,,
etc. Amongg these, hyddrodynamicc methods pprovide a faacile and scaalable strateegy for the preparationn
of Janus paarticles. Unntil now most of microffluidic techniques prep
paring Januss particles area utilizingg
two separaate streams,, which aree coflowed through th
he same chaannel of thehe microfluiidic device..
However, the coflowiing streamss must remaain parallel at all timess without p erturbationss that bringg
pof the fluids. Herein, we
w present a simple buut efficient method off
about crosss-mixing problem
flowing one stream of monom
mer/polymeer solution;; therefore,, it can avvoid the problemp
offcross-mixinng, as in the past casess. In this preesentation, I will talk aboutathe Jaanus particlee formationn
based on pphoto-sensitiive copolym
mers that haave been don
ne for yearss in my labooratory.
Acknowledgement: ThisT
study was suppoorted by Baasic Sciencee Researchh Program throught
thee
n of Koreea (NRF) funded byb the Miinistry of Educationn
National Research Foundation
C
Cosm
metics (20113/11-2014//10).
(2014R1A1A4A010077436) and Coway
Short BIO
OGRAPHY
E-mail: inwo
oo@knu.ac.krr, Tel: +82-95
50-7590, C.P.: 010-4092-82277
B.S. Chemiccal Engineerinng, Yonsei Un
niversity, 1995
5
Ph.D. Chem
mical Engineerring, Yonsei University,
U
200
01
ARC Postdo
oc fellowship, KCPC, Univ. of Sydney, 2002-2003
2
Visiting Sch
holar, CEMS, Univ. of Minnnesota, 2011-2
2012
Associate Prrofessor, Depaartment of Ap
pplied Chemistry, KNU (20005~ )Single-molecule chemistry and spectroscopy with STM
Yousoo Kim*
Surface and Interface Science Laboratory, RIKEN
Hirosawa 2-1, Wako, Saitama 351-0198, Japan

ABSTRACTThe study of single molecules provides deep insights into bonding nature and underlying quantum
mechanics concerning about controlling chemical reaction. The scanning tunneling microscope(STM) is a versatile and powerful tool for investigating and controlling chemistry of individual
molecules on the solid surfaces. The coupling of tunneling electrons to the electronic andvibrational states of the target molecule allows us to realize mode-selective and state-selective
chemistry of the individual molecules as well as to understand how the electron energy cantransport leading to carious surface processes.
In this talk, I will address two main issues with our experimental and theoretical efforts on
investigating interaction of electrons with vibrational and electronic states of a single molecule on
the surfaces. The first part is assigned to the excitation of vibrational modes to selectively induce
particular dynamic motion and chemical reaction of a single molecule on the metal surfaces. The
microscopic mechanism of vibrationally induced molecular motions and the selection rules for the
single-molecule vibrational spectroscopy are also discussed. The second part focuses on theselective control of reaction pathways by use of long lifetime of vibrationally and electronically
excited states of a molecule on an ultrathin insulating metal oxide surface. The theoretical study
revealed that the presence of O vacancies or Mg interstitials at the interface between MgO ultrathin
film and Ag(100) substrate result in a substantially lower barrier for the dissociation ofwater.Finally, I will discuss about our recent works with a photon-STM, where optical properties ofa single metal-free phthalocyanine (H2Pc) molecule on the 2-ML thick NaCl film supported byAg(111) have been also studied by scanning tunneling luminescence spectroscopy.

Short BIOGRAPHY
E-mail: ykim@riken.jp, Tel: +81-48-467-4073,
B.S. Chemistry, Seoul National University, 1991
Ph.D. Applied Chemistry, The University of Tokyo, 1999
Chief Scientist (2015- )Director of Surface and Interface Science Laboratory, RIKENNEAR-ROOM TEMPERATURE SYNTHESIS OF CORE/SHELL-STRUCTURED QUANTUM
DOTS

Junhyeong Kim, Eunjung Kang, Jaesung Son, In Woo Cheong, Jin Joo*
School of Applied Chemical Engineering, Graduate School, Kyungpook National University
Daegu 702-701, Korea

ABSTRACT
Core/shell-structured quantum dots (QDs) are considered as important active materials for
optoelectronic devices. There have been a lot of synthesis procedures developed so far. Realepitaxial growth of shell layer, however, has not been reported yet. A simple method for thesynthesis of CdSe/CdS core/shell QDs is presented. Epitaxial growth of CdS shell on CdSe core is
carried out by near room temperature successive ion layer adsorption and reaction (RT-SILAR).
Our method for shell formation is conducted at room temperature, which facilitates the separationof resulting products from shell growth solution. After full coverage with one monolayer (ML) of
CdS on CdSe QDs surface, photoluminescence (PL) quantum yield (QY) reaches up to 60%.
Produced CdSe/CdS QDs have an elongated morphology, implying that CdS layers are formed inan epitaxial manner without etching or deteriorating CdSe QDs surface. This synthesis method forcore/shell-structured QDs would be an ideal model for practical implication of QDs as well as
fundamental studies.

Short BIOGRAPHY
Email:sweety6min@naver.com C.P.: 01029139534
B.S. Applied Chemistry, Kyungpook National University (2015)
Ph.D. candidate, Kyungpook National University, Daegu, South Korea (2015- )Preparaation of phhoto and temperatture respo
onsive pollymeric vvesicles coontainingsp
pironaphtthoxazinee via W/OO/W doublle emulsioon
Mi Ri K
Kim, In Woo
o Cheong*

School of A
Applied Chemical Engin
neering, Graaduate Schoool, Kyungpo
ook Nationaal Universityy
Daeggu 702-701, Korea
K

ABSTRAACTPolymers hhave proven themselv
ves as an iddeal candidaate in developing stim
muli-responssive systemmbecause oof their verrsatility thrrough funcctional sub
bstituents. Stimuli-respS
ponsive polymers areeclassified as physicall (light, tem
mperature, magnetic), chemical (solvent, ioonic strengtth, pH), orrbiological stimuli (ennzymes, recceptors). Am
mong vario
ous stimuli, light is thhe most attractive onee
because oof easy coontrol of intensity,isspatial locaalization, andawaveleength channges. Mostt
photo-respponsive polyymers reporrted that conntain light-ssensitive chhromophoress, such as azobenzene,a,cinnamoyl, and spiroppyran groupps.
In the pressent work, spironaphthsoxazine (SPPO) methaccryloyl was used as a llight-stimulii monomer,,which unddergoes photto-isomerization from closed to op
pen forms resultingrthee changes in color anddhydrophobbicity underr the UV lig
ght of 365 nnm. Copoly
ymers contaaining SPO moiety were preparedd
from N-issopropylacrrylamide (NNIPAAm) and styren
ne monommers througgh reversib
ble-additionn
fragmentattion chain transfer (RRAFT) poolymerizatio
on, and coorrespondingg vesicles were alsoo
prepared uusing W/O/W
W double emulsion.
eP
Photo-respon
nsive behav
viour of theese vesicless under UVV
and visiblee light will beb discussedd.
Acknowledgement: ThisT
study was suppoorted by Baasic Sciencee Researchh Program throught
thee
n of Koreea (NRF) funded byb the Miinistry of Educationn
National Research Foundation(2014R1A1A4A010077436) .

Short BIO
OGRAPHY
E-mail: mile1e1@naver.coom, Tel: +82--950-7590, C.P
P.: 010-5144--8177
B.S. Polymer Engineeringg, Kumoh Natiional Institutee of Technologgy, 2014

PHASE-SEPARATED MOLECULAR ASSEMBLIES FROMAMPHIPHILIC POLYPEPTIDES HAVING HELICALHYDROPHOBIC BLOCK
Motoki Ueda, Yoshihiro Ito
Nano Medical Engineering Laboratory, RIKEN
Hirosawa 2-1, Wako, Saitama 351-0198, Japan

ABSTRACTSupramolecules of molecular assemblies are promising nano- or micro-order materials due to theeasiness in preparation. The precise control of complex morphology, however, is not easy and thus
has been an important challenge in the field of molecular self-assembly. In a cell membrane, an
example of the natural molecular assembly, the phase separation enables the control of the uniquemorphology on cell membrane like caveolae for an effective expression of the cell function. The
most phase-separated assemblies reported so far were too unstable to control the size and shape ofthem.
Here we show that amphiphilic helical peptides can self-assemble into various conjugate
morphologies by the phase-separation basis due to selective association of helices including
stereocomplex formation of right-handed and left-handed helices. Helical peptides have a good
regular packing ability and a high stability in the molecular assembly as shown by frequent
observations of helix bundles in proteins. Round-bottom flask assemblies, which are conjugate
morphologies of nanotubes and vesicles, can be prepared from amphiphilic helical peptides. The
dimensions of the neck part and the spherical part are tunable by changing the combination of theamphiphilic helical peptides. Furthermore, we succeeded to prepare the linear heterojunction by afusion of different nanotubes with keeping phase-separation.

Short BIOGRAPHY
E-mail: motoki.ueda@riken.jp, Tel: +81-48-467-9303,
B.S. Material Engineering, Kyoto University, 2006
M.S. Engineering, Nara Institute of Science and Technology, 2008
Ph.D. Engineering, Kyoto University, 2011
Researcher, Advanced Scientific Technology and Management Research Institute of Kyoto,
2011-2012
Assistant Professor, Graduate School of Medicine, Kyoto University, 2012-2014
Research Scientist, Nano Medical Engineering Laboratory, RIKEN, 2014-present
Research Scientist, Emergent Bioengineering Materials Research Team,
Center of Emergent Matter Science, 2014-present

Detection of antigen from human plasma solution by functionalized liquid
crystal droplets
Kyubae Lee, Inn-Kyu Kang*
School of Applied Chemical Engineering, Graduate School, Kyungpook National University
Daegu 702-701, Korea

ABSTRACT
For more than one decade, liquid crystal(LC) microdroplets have attracted considerable attention
not only as chemical targeting but also as biological targeting. Versatile and label free techniquebased on mono-disperse liquid crystal microdroplets can detect and distinguish antigen from mixed
protein solution. The purpose of the study was to find out the interaction between antibody andantigen. 4-Cyano-4´-pentylbiphenyl(5CB, nematic liquid crystal) microdroplets were prepared byusing O/W emulsion system. Amphiphilic diblock copolymer of poly (Styrene-b-acrylic acid)(PS-b-PA) was used as a surfactant to prepare the emulsion. Furthermore, anti-IgG(antibody) was
introduced on the surface of the LC microdroplets as a hosting platform for protein immunoassays.
We also studied the effect of IgG(antigen) concentration on sensing ability of LC droplets as well as
selective detection of the LC droplets in mixed protein solution. From the results it was found that
the LC microdroplets exhibited configurational change from radial to bipolar by interaction with
antigen. Therefore it could be say that functionalized LC microdroplets can play pivotal role indetection of various antigen molecules.

Short BIOGRAPHY
E-mail: power7903@hanmail.net Tel: +82-950-5629, C.P.: 010-4517-6723
B.S. Polymer Science, Kyungpook National University, 2014
M.S. candidate Polymer Science, Kyungpook University, 2015

Aptameer -based selectivesellectron traansfer fromm photo-eexcited staate of Ru(bbpy)32+T*,, Tosshiro Aigakii , Yoshihiroo Ito *,, Taakanori Uzaw
wa*.
Tran Thi Thanh Thoa
* NanoN
medical engineering laboratory, RIKEN, 2-1 Hirosawa, W
Wakoshi, Saiitama, Japann.


Graduate School off Science andd Engineerinng, Tokyo Meetropolitan U
University, 2--1 Minami O
Osawa,
Hachioji, Tokyo, Jap
pan. Email: tthoa.tran@rikken.jp.

ABSTRA
ACT: Ru(bppy)32+ have attracted atttention overr the past thhree decadess due to theeir strong2+
reductive anda oxidativ
ve abilities. However, Ru(bpy)Rcaan be also sstrongly queenched by ooxygen in3

solution (kkq=3.3×109). In particu
ular, there have been many studdies of the interaction between
Ruthenium
m complexes with RNA and DNA. ConsequentlCly, RNA is mmore structuurally rich thhan DNA
and can wo
ork as an enzzyme, so an artificial RN
NA antibodyy (aptamer) is an interessting target tto bind toRu(bpy)32++. With purp
pose to prev
vent the elecctron transfeer from Ru(bbpy)32+ to dioxygen. w
we should
select RNA
A aptamer bindsbto Ru((bpy)32+. To do so, canddidate aptam
mer sequencees were seleected andidentified from conveerted-RNA librarylof 10
015 DNA m
molecules using SELEX
X after 12 roounds of
selection. AfterA
12 rounnds selectionn by using SELEXS
we oobtained 8 caandidate sequuences and iidentified
a minimumm functional sequence for binding
g to Ru(bpy))32+. The iddentified apttamer does not only
enantiomerr selectively
y binds too -Ru(bpyy)32+ (Kd=665nM) -Ruu(bpy)32+ dderivatives but also
selectively binds to precisep
3D structure. The
T bindingg of Ru(bbpy)32+to apptamer elonngates its
phosphoresscence lifetim
me 4 times. Furthermoree, the life tim
me of aptam
mer-bound -Ru(bpy)32+ does notchange unnder aerobicc and anaerobic condition, but thee life of frree -Ru(bppy)32+ underr aerobic
condition isi longer thaan its life timme under annaerobic con dition. Thuss life time suuggests that the tightpacking off the Ru in
nside of the aptamer reeduces quennching efficiiency via w
water dissipaation andoxygen-quenching. Intterestingly, when we co
onducted quuenching exp
xperiment froom -Ru(bppy)32+ byusing paraqquat as an ellectron acceptor, strong reductive quuenching off -Ru(bpy)32+ is held evven upon
the binding
g of the aptamer. Thus result pointts out that oour aptamer can blocks dioxygen quuenchingfrom -Ruu(bpy)32+ witthout impactting -Ru(bppy)32+ reducctive ability.
Shorrt biographyy:
B.S
S. Biology, Huee University, Vietnam,
V
2004
M.S
S.C. Biochemisstry, Vietnam National
N
Univeersity, 2009
Ressearch assistantt, Hue Universsity, 2002-20066.
Ressearch assistantt, Key lab of NanoN
medicine,, Vietnam natioonal universityy, 2006-2009.
Ressearch assistantt, Chosun Univ
versity and Kw
wangju institutee of science andd technology, 22010-2011
Ressearch associate, Nanomedicaal engineering Lab., Riken, Jaapan, 2012-preesent.

Application of the Fuoss-Kirkwood Relation toInferring Relaxation Time Spectrum
Sang Hun Lee, Jung-Eun Bae, and Kwang Soo Cho*
School of Applied Chemical Engineering, Graduate School, Kyungpook National University
Daegu 702-701, Korea

ABSTRACTIn the theory of linear viscoelasticity, relaxation time spectrum must be the one of the mostimportant viscoelastic functions because other viscoelastic functions can be calculated from it.
However, it should be calculated from other measurable viscoelastic quantities because it cannot bemeasured directly. The calculation is to solve the Fredholm integral equation of the first kind.
Unfortunately, it is well-known that the calculation of relaxation time spectrum is an ill-posed
problem. Hence, if the solution of the integral equation is not unique, relaxation spectrum would bemeaningless. In 1941, Fuoss and Kirkwood derived the relation between relaxation spectrum anddynamic modulus, called the FK relation which proves the uniqueness of relaxation spectrum.
However, most noteworthy algorithms are not based on the least square rather than the FK relation.
In this study, we developed an algorithm for calculation of continuous relaxation spectrum
using the FK relation. The core of using the FK relation is how well modulus data can beapproximated by an appropriate equation. We suggest double logarithmic power series in terms of
Chebyshev polynomial to approximate dynamic modulus data. Our algorithm is to convert theapproximate equation for modulus to relaxation spectrum. This approximate approach gives
spectrum as accurate as spectra calculated by other previous algorithms based on the least square.

Short BIOGRAPHY
E-mail: gg10star@naver.com, Tel: +82-950-7589, C.P.: +82-10-8541-2336
B.S. Polymer Science and Engineering, Kyungpook National University, Aug. 2014
Graduate Student, Master Course, School of Applied Chemical Engineering, KNU (Aug.
2014-Present)In vitro selection of collagen-binding vascular endothelial growth factor
Shin-Hye Park, Takanori Uzawa, and Yoshihiro Ito*
Nano Medical Engineering Laboratory, RIKEN, 2-1 Hirosawa,
Wako, Saitama, 351-0198, Japan

ABSTRACT
Vascular endothelial growth factor (VEGF) works as important signal protein for angiogenesis
during embryonic development or after injury such as myocardial infarction. However after
injection of small proteins to a body, it diffuses easily through the extracellular matrix and it isdifficult to stay target site for long periods. High concentration of small protein causes undesiredside effect such as hemangioma. Therefore it is useful to add some binding affinity to biologicalcomponents onto VEGF. Since collagen is abundant in cartilage, bones, blood vessels, gut and adentin in teeth, the surface can be used a target for trap the VEGF.
Here we selected a collagen-binding VEGF by ribosome display which is one of in vitro
display technology methods. We prepared random sequences of peptide libraries connected to
VEGF and selected collagen-binding peptides.
After 8 rounds of in vitro selection cycles, 2 kinds of major population of collagen-binding
VEGF were obtained. The selected polypeptides were produced by E. coli. The biological activityof VEGF was not affected by the addition of binding region peptide. The binding affinity ofmodified VEGF onto collagen was confirmed by anti-VEGF antibody. As a result they enhanced
cell proliferation more significantly than free VEGF on collagen surface.

Short BIOGRAPHY
E-mail: shinhye.park@riken.jp, Tel: +81-48-467-2837
B.S. Department of biotechnology, Chung-Ang University, 2012
Research institute of bio-resource & environment, Chung-Ang University, (2012~ )PhD, Department of life science and medical bioscience, Waseda University, (2013~ )IN-VITRO DETECTION OF CANCER CELLS USING LIGAND-ANCHORED
LIQUID CRYSTAL MICRODROPLETS
Yuri Choi, Kyubae Lee, Wang Ding, Inn-Kyu Kang*
School of Applied Chemical Engineering, Graduate School, Kyungpook National University
Daegu 702-701, Korea

ABSTRACT
Liquid crystal microdroplets emulsion for the detection of HepG2 cancer cells has been preparedusing 4-cyano-4’-pentyl biphenyl (5CB) liquid crystal molecules in presence of sodium dodecyl
sulfate as mediator and ligand anchored poly(styrene-b-acrylic acid) (PS-b-PA) as modifier ofliquid crystal/water interfaces. To induce HepG2 cells interactions with liquid crystal microdroplets,
the lactobionic acid (LA) ligand-anchored poly (styrene-b-acrylic acid) (PS-b-PA-LA) has beensynthesized and used to prepare liquid crystal microdroplets emulsion in phosphate buffer saline
solution. The interactions of HepG2 cells with liquid crystal microdroplets containing PS-b-PA-LA
were found to be effective in causing configurational transition from radial to bipolar in liquid
crystal molecules during a contact time of 3h in PBS solution (pH 7.4). These studies have clearly
indicated that lactobionic acid ligand has strong affinity to interact with HepG2 cells receptor tocause configurational transitions in liquid crystal microdroplets emulsion in comparison tomaltotrionic acid control. The interactions of liquid crystal microdroplets emulsion containing
lactobionic acid-anchored PS-b-PA-LA also found to be selective to interact with HepG2 cells inpresence of control cells such as KB cancer cells and fibroblast cells at pH 7.4 at 30oC. Thesestudies have clearly indicated that liquid crystal microdroplets emulsion containing lactobionicacid-anchored PS-b-PA-LA can be used to develop biosensor for label free optical detection of
HepG2 cancer cells in hepatocellular carcinoma using biological fluid.

Short BIOGRAPHY
E-mail: ikkang@knu.ac.kr, Tel: +82-950-5629, C.P.: 010-5287-9629
B.S. Polymer Science, Kyungpook National University, 1980
Ph.D. Polymer Science, Kyoto University, 1987
Professor, Department of Polymer Science, KNU (1988- )President, Korean Society for Biomaterials, 2009
Dean, School of Applied Chemical Engineering, KNU (2013- )Director, KNU Center for Scientific Instruments (2012- )