bluuebunny/crossref_metadata_2025_split huggingface dataset:
Functionalized Cubic Mesoporous Silica as a Non‐Chemodosimetric Fluorescence Probe and Adsorbent for Selective Detection and Removal of Bisulfite Anions along with Toxic Metal Ions
Authors: Chatterjee Sobhan , Paital Alok Ranjan 
Published: December 2017

AbstractDual signaling and remediation systems for detection and adsorption of toxic analytes have gained more attention over sensory probes only. However, most of the sensors for bisulfites are chemodosimetric probes, which are irreversible and having drawbacks of absolute selectivity, recyclability, and solubility in a pure aqueous system. To address above drawbacks a new non‐chemodosimetric probe material with a strong hydrogen bonding pocket for bisulfites is developed. Synthesis of cubic mesoporous silica by a modified Stober process followed by functionalization with 2,2′‐(((((3‐(triethoxysilyl)propyl)azanediyl)bis(methylene))bis(2,1‐phenylene))bis(oxy))bis(N‐(4‐((E)‐phenyldiazenyl)phenyl)acetamide) (AZOL) has given a fluorogenic silica probe material SiO2@AZOL. This material shows selectivity toward bisulfite anion (limit of detection (LOD): 64 ppb) and Hg2+, Cd2+, Cu2+, and Zn2+ cations (LOD: 126, 95, 14, and 27 ppb, respectively) among various analytes. The adsorption studies for these toxic analytes (HSO3
−, Hg2+, Cd2+, Cu2+, and Zn2+) show an extraction efficiency of around 99% and adsorption capacities of 873, 630, 633, 260, and 412 mg g−1, respectively. Spectroscopic studies along with adsorption, striping, and regeneration studies reveal that this material is a recyclable sensory cum adsorbent material for these toxic analytes. Moreover, this material can be used as a sensitive probe material for determination of HSO3
− levels in various sugar samples.
Easily Processable and Programmable Responsive Semi‐Interpenetrating Liquid Crystalline Polymer Network Coatings with Changing Reflectivities and Surface Topographies
Authors: Kragt Augustinus J. J. , Broer Dirk J. , Schenning Albertus P. H. J. 
Published: December 2017

AbstractThe fabrication of stimulus‐responsive coatings that change both reflectivity and topography is hampered by the lack of easy processable, patternable, and programmable elastomers. Here, an easily applied reflective coating based on a semi‐interpenetrating polymer network composed of a liquid crystal elastomer and a liquid crystal network (>15 wt%) is reported. The reflective wavelength of these polysiloxane elastomer photonic coatings can be readily programed by the concentration of chiral reactive mesogen dopant that forms the network. The coatings show a fast and reversible decrease in reflection band intensity with increasing temperature, which can be tuned by the polymer network density. In addition, hierarchical surface relief structures are prepared, which can be reversibly changed with temperature.
Optical Chemical Barcoding Based on Polarization Controlled Plasmonic Nanopixels
Authors: Langley Daniel Peter , Balaur Eugeniu , Hwang Yongsop , Sadatnajafi Catherine , Abbey Brian 
Published: December 2017

AbstractPlasmonic devices offer the possibility of passively detecting changes in local chemistry that opens up a wide range of applications from molecular sensing to monitoring water quality. Conventional plasmonics have previously shown great promise as nanoscale chemical sensors through detection of small variations in the local refractive index (RI). The motivation behind using plasmonics for these applications includes the fact that detection is entirely passive and the devices themselves can be readily miniaturized. Previously, a lack of any control over the output of these devices, has fundamentally limited their application to chemicals which produce clearly identifiable resonances within the range of detection. Here it is demonstrated that microfluidic devices, incorporating polarization‐controlled plasmonic nanopixels, allow the device response to be tuned to the particular analyte of interest, anywhere within the visible spectrum. This dramatically increases the effective dynamic range and allows local variations in RI to be perceived directly as color changes by the human eye. Active control over the output of the device also enables clear differentiation between a number of different analytes, paving the way for plasmonics to be used for a wide range of real‐world chemical sensing applications.
An In Situ Formed, Dual‐Phase Cathode with a Highly Active Catalyst Coating for Protonic Ceramic Fuel Cells
Authors: Chen Yu , Yoo Seonyoung , Pei Kai , Chen Dongchang , Zhang Lei , deGlee Ben , Murphy Ryan , Zhao Bote , Zhang Yanxiang , Chen Yan , Liu Meilin 
Published: December 2017

AbstractComposite cathodes of solid oxide fuel cells (SOFCs) are normally fabricated by mechanical mixing of electronic‐ and ionic‐conducting phases. Here, a dual‐phase SOFC cathode, composed of perovskite PrNi0.5Mn0.5O3 (PNM) and exsoluted fluorite PrOx particles, produced in situ through a glycine–nitrate solution combustion process, is reported. When applied as the cathode for a BaZr0.1Ce0.7Y0.1Yb0.1O3‐based protonic ceramic fuel cell, the hybrid cathode displays excellent electrocatalytic activity (area‐specific resistance of 0.052 Ω cm2 at 700 °C) and remarkable long‐term stability when operated at a cell voltage of 0.7 V for ≈500 h using H2 as fuel and ambient air as oxidant. The excellent performance is attributed to the proton‐conducting BaPrO3‐based coating and high‐concentration oxygen vacancies of a Ba‐doped PNM surface coating, produced by the reaction between the cathode and Ba from the electrolyte (via evaporation or diffusion), as confirmed by detailed X‐ray photoelectron spectroscopy, Raman spectroscopy, and density functional theory‐based calculations.
From Fragility to Flexibility: Construction of Hydrogel Bridges toward a Flexible Multifunctional Free‐Standing CaCO3 Film
Authors: Yuan Xue , Nie Wu‐Cheng , Xu Chen , Wang Xiao‐Hui , Xiao Qian , Song Fei , Wang Xiu‐Li , Wang Yu‐Zhong 
Published: December 2017

AbstractFree‐standing CaCO3 materials are an important member in biological systems because of their existence in many natural organisms such as nacre, shell, and crustacean cuticle. However, toughness of those artificial mineral films is sacrificed once their inorganic content is up to 90%, thus free‐standing characteristics have seldom been achieved for CaCO3 films, let alone their real applications. Herein a fast and simple method for constructing hydrogel “bridges” for CaCO3 microparticles is presented, developing highly flexible free‐standing CaCO3 films with only 5% organic content. Such integrated films have underwater superoleophobicity and self‐cleaning function, which guarantee their repeated application in oil/water separation. Furthermore, heavy metal ions can be efficiently removed by simple filtration with the films. Because of the self‐similar structure, the films are able to resist mechanical abrasion without losing the anti‐wetting property and separation efficiency. The free‐standing CaCO3 films are put forward for the first time to practical application, demonstrating the strategy can bring a brilliant prospect to artificial biomineral materials.
2D Dual‐Metal Zeolitic‐Imidazolate‐Framework‐(ZIF)‐Derived Bifunctional Air Electrodes with Ultrahigh Electrochemical Properties for Rechargeable Zinc–Air Batteries
Authors: Wang Tingting , Kou Zongkui , Mu Shichun , Liu Jingping , He Daping , Amiinu Ibrahim Saana , Meng Wen , Zhou Kui , Luo Zhixiong , Chaemchuen Somboon , Verpoort Francis 
Published: December 2017

AbstractHere first a 2D dual‐metal (Co/Zn) and leaf‐like zeolitic imidazolate framework (ZIF‐L)‐pyrolysis approach is reported for the low‐cost and facile preparation of Co nanoparticles encapsulated into nitrogen‐doped carbon nanotubes (Co‐N‐CNTs). Importantly, the reasonable Co/Zn molar ratio in the ZIF‐L is the key to the emergence of the encapsulated microstructure. Specifically, high‐dispersed cobalt nanoparticles are fully encapsulated in the tips of N‐CNTs, leading to the full formation of highly active Co–N–C moieties for oxygen reduction and evolution reactions (ORR and OER). As a result, the obtained Co‐N‐CNTs present superior electrocatalytic activity and stability toward ORR and OER over the commercial Pt/C and IrO2 as well as most reported metal‐organic‐framework‐derived catalysts, respectively. Remarkably, as bifunctional air electrodes of the Zn–air battery, it also shows extraordinary charge–discharge performance. The present concept will provide a guideline for screening novel 2D metal‐organic frameworks as precursors to synthesize advanced multifunctional nanomaterials for cross‐cutting applications.
Stimuli‐Responsive Nucleic Acid‐Based Polyacrylamide Hydrogel‐Coated Metal–Organic Framework Nanoparticles for Controlled Drug Release
Authors: Chen Wei‐Hai , Liao Wei‐Ching , Sohn Yang Sung , Fadeev Michael , Cecconello Alessandro , Nechushtai Rachel , Willner Itamar 
Published: December 2017

AbstractThe synthesis of doxorubicin‐loaded metal–organic framework nanoparticles (NMOFs) coated with a stimuli‐responsive nucleic acid‐based polyacrylamide hydrogel is described. The formation of the hydrogel is stimulated by the crosslinking of two polyacrylamide chains, PA and PB, that are functionalized with two nucleic acid hairpins (4) and (5) using the strand‐induced hybridization chain reaction. The resulting duplex‐bridged polyacrylamide hydrogel includes the anti‐ATP (adenosine triphosphate) aptamer sequence in a caged configuration. The drug encapsulated in the NMOFs is locked by the hydrogel coating. In the presence of ATP that is overexpressed in cancer cells, the hydrogel coating is degraded via the formation of the ATP–aptamer complex, resulting in the release of doxorubicin drug. In addition to the introduction of a general means to synthesize drug‐loaded stimuli‐responsive nucleic acid‐based polyacrylamide hydrogel‐coated NMOFs hybrids, the functionalized NMOFs resolve significant limitations associated with the recently reported nucleic acid‐gated drug‐loaded NMOFs. The study reveals substantially higher loading of the drug in the hydrogel‐coated NMOFs as compared to the nucleic acid‐gated NMOFs and overcomes the nonspecific leakage of the drug observed with the nucleic‐acid‐protected NMOFs. The doxorubicin‐loaded, ATP‐responsive, hydrogel‐coated NMOFs reveal selective and effective cytotoxicity toward MDA‐MB‐231 breast cancer cells, as compared to normal MCF‐10A epithelial breast cells.
Oxygen Clusters Distributed in Graphene with “Paddy Land” Structure: Ultrahigh Capacitance and Rate Performance for Supercapacitors
Authors: Liu Zheng , Jiang Lili , Sheng Lizhi , Zhou Qihang , Wei Tong , Zhang Bingsen , Fan Zhuangjun 
Published: December 2017

AbstractThe introduction of surface functional groups onto graphene can provide additional pseudocapacitance for supercapacitors. However, the compensation for the loss of electrical conductivity arising from the disruption of the conjugated system remains a big challenge. Here, a novel strategy is reported for the design of oxygen clusters distributed in graphene with “paddy land” structure via a low‐temperature annealing process. Moreover, the distribution, content, and variety of oxygen groups and the conductivity of reduced graphene oxide (RGO) can be easily adjusted by annealing temperature and time. First‐principles calculations demonstrate that “paddy land” structure exhibits conjugated carbon network, ultralow HOMO–LUMO gap, and long span of atomic charge values, which are beneficial for the enhanced pseudocapacitance and rate performance. As a result, the functionalized graphene (GO‐160‐8D) exhibits high specific capacitance of 436 F g−1 at 0.5 A g−1, exceeding the values of previously reported RGO materials, as well as excellent rate performance (261 F g−1 at 50 A g−1) and cycling stability (94% of capacitance retention after 10 000 cycles). The findings may open a door for finely controlling the location and density of functionalities on graphene for applications in energy storage and conversion fields via a green and energy‐efficient process.
Transduction Methods for Cytosolic Delivery of Proteins and Bioconjugates into Living Cells
Authors: Chiper Manuela , Niederreither Karen , Zuber Guy 
Published: December 2017

AbstractThe human organism and its constituting cells rely on interplay between multiple proteins exerting specific functions. Progress in molecular biotechnologies has facilitated the production of recombinant proteins. When administrated to patients, recombinant proteins can provide important healthcare benefits. To date, most therapeutic proteins must act from the extracellular environment, with their targets being secreted modulators or extracellular receptors. This is because proteins cannot passively diffuse across the plasma membrane into the cytosol. To expand the scope of action of proteins for cytosolic targets (representing more than 40% of the genome) effective methods assisting protein cytosolic entry are being developed. To date, direct protein delivery is extremely tedious and inefficient in cultured cells, even more so in animal models of pathology. Novel techniques are changing this limitation, as recently developed in vitro methods can robustly convey large amount of proteins into cell cultures. Moreover, advances in protein formulation or protein conjugates are slowly, but surely demonstrating efficiency for targeted cytosolic entry of functional protein in vivo in tumor xenograft models. In this review, various methods and recently developed techniques for protein transport into cells are summarized. They are put into perspective to address the challenges encountered during delivery.
A Novel Acoustomicrofluidic Nebulization Technique Yielding New Crystallization Morphologies
Authors: Ahmed Heba , Lee Lillian , Darmanin Connie , Yeo Leslie Y. 
Published: December 2017

AbstractA novel acoustic microfluidic nebulization platform is demonstrated, which, due to its unique ability to access intermediate evaporation rate regimes—significantly faster than that in slow solvent evaporation but considerably below that achieved in spray drying, is capable of producing novel crystal morphologies that have yet to be reported in both model inorganic and organic systems. In addition, the potential for simultaneously encapsulating single crystals within a biodegradable polymeric coating in a single simultaneous step together with the crystallization process as the solvent evaporates during nebulization is briefly shown. The platform not only has the potential to be highly scalable by employing a large number of these low‐cost miniature devices in parallel to achieve industrially relevant particle production rates, but could also be advantageous over conventional spray drying in terms of energy utilization, given the tremendous efficiency associated with the high‐frequency ultrasonic microdevice as well as its ambient temperature operation.
Synergism of Rare Earth Trihydrides and Graphite in Lithium Storage: Evidence of Hydrogen‐Enhanced Lithiation
Authors: Zheng Xinyao , Yang Chengkai , Chang Xinghua , Wang Teng , Ye Meng , Lu Jing , Zhou Henghui , Zheng Jie , Li Xingguo 
Published: December 2017

AbstractThe lithium storage capacity of graphite can be significantly promoted by rare earth trihydrides (REH3, RE = Y, La, and Gd) through a synergetic mechanism. High reversible capacity of 720 mA h g−1after 250 cycles is achieved in YH3–graphite nanocomposite, far exceeding the total contribution from the individual components and the effect of ball milling. Comparative study on LaH3–graphite and GdH3–graphite composites suggests that the enhancement factor is 3.1–3.4 Li per active H in REH3, almost independent of the RE metal, which is evident of a hydrogen‐enhanced lithium storage mechanism. Theoretical calculation suggests that the active H from REH3can enhance the Li+binding to the graphene layer by introducing negatively charged sites, leading to energetically favorable lithiation up to a composition Li5C16H instead of LiC6for conventional graphite anode.
Acoustic Fabrication via the Assembly and Fusion of Particles
Authors: Melde Kai , Choi Eunjin , Wu Zhiguang , Palagi Stefano , Qiu Tian , Fischer Peer 
Published: December 2017

AbstractAcoustic assembly promises a route toward rapid parallel fabrication of whole objects directly from solution. This study reports the contact‐free and maskless assembly, and fixing of silicone particles into arbitrary 2D shapes using ultrasound fields. Ultrasound passes through an acoustic hologram to form a target image. The particles assemble from a suspension along lines of high pressure in the image due to acoustic radiation forces and are then fixed (crosslinked) in a UV‐triggered reaction. For this, the particles are loaded with a photoinitiator by solvent‐induced swelling. This localizes the reaction and allows the bulk suspension to be reused. The final fabricated parts are mechanically stable and self‐supporting.
Thermally Induced Bending of ReS2 Nanowalls
Authors: Zhang Qin , Wang Wenjie , Zhang Jiaqian , Zhu Xiaohui , Fu Lei 
Published: December 2017

AbstractAmong the variety of stimuli‐responsive materials, temperature‐responsive materials (TRMs) can adapt to the surrounding environment in the presence of a thermal stimulus, and they have attracted considerable attention in sensors, actuators, and surface engineering. However, polymers, as the most representative TRMs, are far from ideal with respect to long‐term reliability and durability. Here, for the first time, an inorganic material, ReS2, is analyzed, which possesses an unexpected temperature‐responsive behavior that is triggered by stable and reversible thermally induced bending (TIB). Due to thermal fluctuations in the ReS2 layers, intrinsic ripples tend to aggravate rapidly with rising temperature. Then, the weak interlayer interaction of ReS2 is further weakened, thus resulting in interlayer sliding. Due to a decrease in bending rigidity with increasing temperature, out‐of‐plane bending spontaneously occurs in the ReS2 layers. Interestingly, this TIB of ReS2 can recover to its initial configuration when the temperature drops, which is further confirmed by the reversible wetting measurement. Above all, the TIB behavior of ReS2 exhibits great potential in smart applications, such as smart windows and microfluidic devices, and fills the significant gaps of inorganic TRMs.
Highly Stretchable and Reliable, Transparent and Conductive Entangled Graphene Mesh Networks
Authors: Han Jaehyun , Lee Jun‐Young , Lee Jihye , Yeo Jong‐Souk 
Published: December 2017

AbstractA highly stretchable and reliable, transparent and conductive entangled graphene mesh network (EGMN) exhibits an interconnected percolation network, as usually shown in 1D nanowires, but with the electrical, mechanical, and thermal properties of 2D graphene. The unique combination of the 2D material properties and the network structure of wrinkled, waved, and crumpled graphene enables the EGMN to demonstrate excellent electrical reliability, mechanical durability, and thermal stability, even under harsh environmental and external conditions such as very high temperature, humidity, bending, and stretching. Specifically, after 100 000 cycles of bending with radius of 2 mm, the EGMN maintains its resistance similar to its initial value. The EGMN shows a steady monotonic response in resistance to strain cycles of 50 000 times with nearly constant gauge factors of 0.76, 1.67, and 2.55 at 10%, 40%, and 70% strains, respectively. Moreover, the EGMN shows very little change in resistance with the temperature increasing up to 1000 °C, by in situ thermal analysis with transmission electron microscopy and also by long‐term stability testing at 70 °C and 70% relative humidity for 30 d. These results demonstrate that this novel entangled graphene mesh network can significantly broaden the application areas for various types of wearable and stretchable devices.
Growth and Characterization of 3D Flower‐Like β‐NiS on Carbon Cloth: A Dexterous and Flexible Multifunctional Electrode for Supercapattery and Water‐Splitting Applications
Authors: Surendran Subramani , Selvan Ramakrishnan Kalai 
Published: December 2017

AbstractEvolution of 3D nanostructures is luring a great deal of importance owing to their eccentric structures that create plenty of rooms to grasp massive volume of charges. Here, a distinct multifunctional binder‐free flexible electrode is developed by arrays of flower‐like β‐NiS nanostructures over flexible carbon cloth (β‐NiS@CC) by the in situ hydrothermal method. It unveils an ultimate areal capacity of 1.654 C cm−2 (827 C g−1) at 1 mA cm−2, which seems to be the highest among the reported NiS so far. The fabricated flexible supercapattery gadget delivers a remarkable energy density of 38 µWh cm−2 at a power density of 800 µW cm−2. Due to immense mechanical strength and resilience of 3D flower‐like morphology, it is further exposed as an economical bifunctional electrocatalyst. Both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) exhibit a significant burst of the enormous quantity of gas bubbles at the low overpotentials of 320 and 278 mV, respectively, to achieve a current density of 20 mA cm−2. Further, the developed laboratory scale water electrolyzer offers a low cell voltage of 1.65 V to accomplish a water‐splitting current density of 10 mA cm−2. Henceforth, the multifunctional 3D flower‐like β‐NiS electrode is demonstrated by defining its potential use in real‐world appliances.
Construction of a Multiway Carbon Nanotube Loudspeaker with Finely Tunable Resonance Frequencies
Authors: Shin Eui Joong , Park Soo Yeon , Kim Choong Sun , Cho Byung Jin , Choi Jung‐Woo 
Published: December 2017

AbstractThe sound pressure generated by thermo‐acoustic (TA) loudspeakers is proportional to the frequency of the sound. This characteristic yields a low sound pressure level (SPL) in the low‐frequency region, hindering the practical application of TA loudspeakers. The limitation of low SPL is approached by using a resonating structure, in which a TA sound generator, such as multiwalled carbon nanotube sheet, is enclosed within a cavity covered by a vibrating plate. However, the cavity‐plate resonator produces an amplified SPL only around the resonating frequency, so its operating frequency bandwidth is narrow. Hence, a multiway TA loudspeaker consisting of multiple resonators that can amplify sound over a wide frequency range is designed. An accurate mechanical model is presented for predicting the resonance frequency and it shows that the behavior of resonators designed from the proposed model matches the theory well. The model enables the fine‐tuning of resonances through the application of different materials for a resonator plate and by changing the structural dimensions. A crossover network for combining multiple TA resonators is designed, and the total frequency response shows a flat frequency response with amplified SPL. These improvements open up possibilities for the use of TA loudspeakers as a practical audio device.
Digital Aerosol Jet Printing for the Fabrication of Terahertz Metamaterials
Authors: Jahn David , Eckstein Ralph , Schneider Lorenz Maximilian , Born Norman , Hernandez‐Sosa Gerardo , Balzer Jan C. , Al‐Naib Ibraheem , Lemmer Uli , Koch Martin 
Published: December 2017

AbstractIn this paper the use of aerosol jet printing as a fabrication and rapid prototyping method for terahertz metamaterials is presented. Since this technique combines the very precise deposition of metallic inks with line widths down to 10 µm and the use of digitally generated tool paths, it is highly suitable for fabricating arbitrary 2D microstructures for terahertz applications. The fabrication of a metamolecule composed of four closed ring resonators with two different radii on conventional polyester foil is shown. Furthermore, the metamaterials are characterized thoroughly using microscopic images, confocal microscopy, and terahertz time‐domain spectroscopy, which demonstrate impressively the suitability of this fabrication technology for terahertz applications. For an additional validation the experimentally gathered data with numerical simulations are compared.