2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

9aB-1
September 9th (Tue.), <10:00-10:45>
Room1

Development of Low-Temperature Sintering Technique for
Plastic Dye-Sensitized Solar Cells
Shungo Zen
The University of Tokyo Department of Advanced Energy

Abstract:
Dye-sensitized solar cell (DSSC) requires sintering of TiO2
photoelectrode at 450~550 C to be manufactured.
However, the high-temperature sintering is disadvantageous because it
limits the use of materials that cannot withstand high temperatures.
In our previous work, we proposed plasma and low-pressure mercury(Hg) lamp ultraviolet (UV) treatments of the TiO2 electrode to reduce thesintering temperature by half. It was concluded that the effect of the surface
treatment is due to reactive oxygen species (O3, O, OH) produced by theplasma and UV light.In this paper, we propose two techniques for TiO2
photoelectrode, there can reduce the sintering temperature from 450 C to 150 C.
We were succeded in manufacturing plastic DSSC at 150-C sintered by using
new techniques.
The conversion efficiency of plastic DSSC was 3.1 %.

2014 Annual Meeting of The Institute of Electrostatics JapanHiroshima International University
September 7-8, 20149aB-2
September 9th (Tue.), <10:00-10:45>
Room 1

Production of Platinum Particles on the Surface of Porous
Substrates Using A Few Tens keV Electron Beam InducedReduction Method○Teruyuki HAKODA*, Shunya YAMAMOTO*, Hirofumi ARITANI**, and Masahito
YOSHIKAWA** Japan Atomic Energy Agency ** Saitama Institute of Technology

Abstract:
The production of noble metal catalyst particles on the surface ofcatalyst substrates were studied using low energy electron beams (EBs) as aradiation-induced reduction method. Porous alumina substrates wereimpregnated in a solution containing PtCl42- ions and ethanol. The surface ofthe substrates was irradiated with EBs. As a result, platinum particles wereproduced on the surface of the substrates. The platinum particles had catalyticactivity. The obtained results suggest that low energy EBs can be applied to theproduction of noble metal catalysts as new application of a radiation-induced
reduction method.

2014 Annual Meeting of The Institute of Electrostatics JapanHiroshima International University
September 7-8, 20149aB-3
September 9th (Tue.), <10:00-10:45>
Room 1

Stabilization method of gold nano-particle on porous
materials using an electrospray microreactor in liquid
Yoshiyuki TERAMOTOAISTAbstract:
Gold nano-particls were stabilized on porous materials using a novel
method. First, colloidal gold solution was prepared using an electrospraymicroreactor in liquid. Its particle size was around 3 nm regardless of atomizingtime of electrospray. And then, carriers were immersed in the prepared colloidal
gold solution. The forms of supported gold nanoparticles were identified ashemispheres ca.3-5 nm in diameter. Their sizes increased with increasing thecolloid concentration (= atomizing time of electrospray). On the other hand, its
size was hardly affected by the carrier material.

2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

9aA-1
September 9th (Tue.), <11:00-12:00>
Room 1

Emission Spectroscopic Measurements ofAtmospheric-pressure Non-thermal Plasma Jets
Generated Using Glass- and Alumina- Tubes○Norimitsu Takamura*，Douyan Wang**，Takao Namihira***，HidenoriAkiyama***Graduate School of Science and Technology, Kumamoto University,
Japan*Priority Organization for Innovation and Excellence, Kumamoto University,
Japan**Institute of Pulsed Power Science, Kumamoto University,
Japan***Abstract:
Atmospheric-pressure non-thermal plasma jets (APPJs) have been
widely studied for the processing of a variety of materials and biomedicalapplications. In the past, a number of papers related to the APPJs’ emission
spectra have been already reported. However, the emission spectra of theAPPJs generated using different dielectric tubes have not been adequately
investigated and reported yet. In this study, therefore, the emission spectra ofthe APPJs generated using glass- and alumina- tubes were measured tocompare how the amount and types of active species changes. In thisexperiment, an observation system using an ICCD camera coupled to aspectrograph was used to measure the emission spectra. The experimental
results show えｄ the amount of active species such as OH＊ (309 nm), N2＊(C3Πu- B3Πg, 337.1 nm), and N2+＊ (B2Σu+ - X2Σg+, 395.1 nm) wereincreased by using alumina tube compared to glass tube. In addition, theexperimental results suggest that there are some different production
mechanisms of active species between using glass- and alumina- tubes.

2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

9aA-2
September 9th (Tue.), <11:00-12:00>
Room 1

Effect of interval time between pulses on streamer discharge○Yuta Ishibashi**,Yoshiyuki Teramoto*, Ryo Ono**

School of Engineering, The University of Tokyo National Institute of Advanced
Industrial Science and Technology (AIST)* Graduate School of FrontierSciences, The University of Tokyo**

Abstract:
Effect of interval time between pulses on discharge was investigatedusing a double-pulse corona discharge in N2. N2(C) production and dischargeenergy of 2nd pulse discharge decreased with decreasing interval time (∆t),
regardless of same applied voltage. Additionally, breakdown voltage of 2ndpulse significantly decreased with decreasing ∆t. When ∆t was 20 s,
breakdown voltage of 2nd pulse came down from 6.3 kV to 2.6 kV.

2014 Annual Meeting of The Institute of Electrostatics JapanHiroshima International University
September 7-8, 2014

9aA-3
September 9th (Tue.), <11:00-12:00>
Room 1

Measurement of negative streamer propagation
Hanakawa Wataru
The university of Tokyo

Abstract:
A negative pulsed corona discharge streamer is observed in apoint-to-plane gap using a short-gated intensified CCD camera and a streak-likephotograph. When the applied voltage is low, the streamer propagates as far as
the middle of the gap. It is different characteristics from the positive streamer.
The shape of the streamer head is rounded and thicker than that of the positivestreamer. The streak-like photograph shows that the negative streamer
propagates in three stages: (i) primary streamer, (ii) strong return stroke from thepositive plane to the negative point electrode, and (iii) secondary streamer.

2014 Annual Meeting of The Institute of Electrostatics Japan
Hiroshima International University
September 7-8, 2014

9aA-4
September 9th (Tue.), <11:00-12:00>
Room 1

Numerical analysis of negative and positive streamer corona
discharge propagations
Daiki Saito
Department of Advanced Energy, The University of Tokyo

Abstract:
We numerically calculate the two-dimensional point-to-plane negativeand positive streamers in a dry-air environment. The calculation has been
performed in the case of a point to plane corona discharge filled with dry air(80% N2, 20% O2) at atmospheric-pressure ambient temperature. The
calculation shows difference between negative and positive streamer
propagations.