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Intermetallic PtBi core/ultrathin Pt shell nanoplates for efficient and I stable methanol and ethanol electro-oxidization

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nano Research 2019年第2期12卷 429-436页

作者： Xiaolei Yuan Xiaojing Jiang Muhan Cao Lei Chen Kaiqi Nie Yong Zhang Yong Xu Xuhui Sun Yanguang Li Qiao Zhang institute of functional nano and soft materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices SWC for I Synchrotron Radiation Research Soochow University 199 Renai Road Suzhou 215123 China

The development of Pt-based core/shell nanoparticles represents an emerging class of electrocatalysts for fuel cells, such as methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). Here, we present a one-pot synthesis approach to prepare hexagonal PtBi/Pt core/shell nan ostructure composed of an in termetallic PtiBii core and an ultrathi n Pt shell with well-defined shape, size, and *** structure and the synergistic effect among different components enhanced their MOR and EOR performanee. The optimized Pt2Bi nanoplates exhibit excellent mass activities in both MOR (4,820 mA·mgpt^-1) and EOR (5,950 mA·mgpt^1) conducted in alkaline media, which are 6.15 times and 8.63 times higher than those of commercial Pt/C, respectively. Pt2Bi nan opiates also show superior operati on durability to commercial Pt/C. This work may inspire the rational design and synthesis of Pt-based nanoparticles with improved performance for fuel cells and other applications.

关键词： intermetallics nanoplates core-shell structure methanol oxidation reaction ethanol oxidation reaction

Integrated solar capacitors for energy conversion and storage

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nano Research 2017年第5期10卷 1545-1559页

作者： Ruiyuan Liu Yuqiang Liu Haiyang Zou Tao Song Baoquan Sun Jiangsu Key Laboratory for Carbon-Based functional materials and Devices Institute of Functional Nano and Soft: Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 China School of materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 USA

Solar energy is one of the most popular clean energy sources and is a promising alternative to fulfill the increasing energy demands of modem society. Solar cells have long been under intensive research attention for harvesting energy from sunlight with a high power-conversion efficiency and low cost. However, the power outputs of photovoltaic devices suffer from fluctuations due to the intermittent instinct of the solar radiation. Integrating solar cells and energy- storage devices as self-powering systems may solve this problem through the simultaneous storage of the electricity and manipulation of the energy output. This review the research progress in the integration of new-generation solar cells with supercapacitors, with emphasis on the structures, materials, performance, and new design features. The current challenges and future prospects are discussed with the aim of expanding research and development in this field.

关键词： solar cell supercapacitor,energy conversion andstorage,integrated devices

Controlling molecular weight of naphthalenediimide-based polymer acceptor P(NDI2OD-T2)for high performance all-polymer solar cells

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Journal of materials Science & Technology 2017年第5期33卷 411-417页

作者： Yu Lei Jianxia Sun Jianyu Yuan Jinan Gu Guanqun Ding Wanli Ma institute of Functionl nano&soft materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesCollaborative InnovationCenter of Suzhou Nano Scinence and TechnologySoochow UniversitySuzhou215123China

A widely-used naphthalenediimide （NDI） based electron acceptor P（NDI2OD-T2） with different number- average molecular weight （Mn） of 38 （N2200L）, 56 （N2200M）, 102 （N2200H） kDa were successfully prepared. The effect of molecular-weight on the performance of all-polymer solar cells based on Poly（5-（5-（4,8- bis（ 5-decylthiophen-2-yl ）-6-methylbenzo[1,2-b： 4,5-b＇]dithophen-2-yl ）thiophen-2-yl ）-6,7-difluoro-8- （5-methylthiophen-2-yl）-2,S-bis（3-（octyloxy）phenyl）quinoxaline）（P2F-DE）：N2200 was systematically investigated. The results reveal that N2200 with increased M. show enhanced intermolecular interac- tions, resulting in improved light absorption and electron mobility. However, the strong aggregation trend of N2200H can cause unfavorable morphology for exciton dissociation and carrier transport. The blend film using N2200 with moderate M. actually develops more ideal phase segregation for efficient charge separation and transport, leading to balanced electron/hole mobility and less carrier recombi- nation. Consequently, all-polymer solar cells employing P2F-DE as the electron donor and N2200M as the electron acceptor show the highest efficiency of 4.81%, outperforming those using N2200L （3,07~;） and N2200H （S,92%）. Thus, the Mn of the polymer acceptor plays an important role in all-polymer solar ceils, which allows it to be an effective parameter for the adjustment of the device morphology and efficiency.

关键词： All-polymer solar cells Polymer acceptor Molecular weight Aggregation Blend morphology

Controlled Growth of Large-Area Aligned Single-Crystalline Organic nanoribbon Arrays for Transistors and Light-Emitting Diodes Driving

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nano-Micro Letters 2017年第4期9卷 193-203页

作者： Wei Wang Liang Wang Gaole Dai Wei Deng Xiujuan Zhang Jiansheng Jie Xiaohong Zhang Jiangsu Key Laboratory for Carbon-Based functional materials and Devices Institute of Functional Nano and Soft Materials(FUNSOM)Soochow University SuzhouSuzhou 215123JiangsuPeople’s Republic of China

Organic field-effect transistors(OFETs) based on organic micro-/nanocrystals have been widely reported with charge carrier mobility exceeding 1.0 cm^2V^(-1)s^(-1), demonstrating great potential for high-performance, low-cost organic electronic applications. However, fabrication of large-area organic micro-/nanocrystal arrays with consistent crystal growth direction has posed a significant technical challenge. Here, we describe a solution-processed dip-coating technique to grow large-area, aligned 9,10-bis(phenylethynyl) anthracene(BPEA) and 6,13-bis(triisopropylsilylethynyl) pentacene(TIPSPEN) single-crystalline nanoribbon arrays. The method is scalable to a 5 9 10 cm^2 wafer substrate, with around 60% of the wafer surface covered by aligned crystals. The quality of crystals can be easily controlled by tuning the dip-coating speed. Furthermore, OFETs based on well-aligned BPEA and TIPS-PEN single-crystalline nanoribbons were *** optimizing channel lengths and using appropriate metallic electrodes, the BPEA and TIPS-PEN-based OFETs showed hole mobility exceeding 2.0 cm^2V^(-1)s^(-1)(average mobility 1.2 cm^2V^(-1)s^(-1)) and 3.0 cm^2V^(-1)s^(-1)(average mobility2.0 cm^2V^(-1)s^(-1)), respectively. They both have a high on/off ratio(I_(on)/I_(off))>10~9. The performance can well satisfy the requirements for light-emitting diodes driving.

关键词： Large-area growth Organic single-crystalline nanoribbon arrays Organic field-effect transistors Light-emitting diodes driving

nanogenerators for Self-Powered Gas Sensing

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nano-Micro Letters 2017年第4期9卷 81-99页

作者： Zhen Wen Qingqing Shen Xuhui Sun institute of functional nano and soft materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devicesand Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123People’s Republic of China

Looking toward world technology trends over the next few decades, self-powered sensing networks are a key field of technological and economic driver for global industries. Since 2006, Zhong Lin Wang's group has proposed a novel concept of nanogenerators(NGs), including piezoelectric nanogenerator and triboelectric nanogenerator, which could convert a mechanical trigger into an electric output. Considering motion ubiquitously exists in the surrounding environment and for any most common materials used every day, NGs could be inherently served as an energy source for our daily increasing requirements or as one of self-powered environmental sensors. In this regard, by coupling the piezoelectric or triboelectric properties with semiconducting gas sensing characterization, a new research field of self-powered gas sensing has been proposed. Recent works have shown promising concept to realize NG-based self-powered gas sensors that are capable of detecting gas environment without the need of external power sources to activate the gas sensors or to actively generate a readout signal. Compared with conventional sensors, these self-powered gas sensors keep the approximate ***, these sensors drastically reduce power consumption and additionally reduce the required space for integration,which are significantly suitable for the wearable devices. This paper gives a brief summary about the establishment and latest progress in the fundamental principle, updated progress and potential applications of NG-based self-powered gas sensing system. The development trend in this field is envisaged, and the basic configurations are also introduced.

关键词： nanogenerator Self-powered Gas sensing Piezoelectric Triboelectric

Recent progress on the excited-state multiple proton transfer process in organic molecules

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Science China Chemistry 2022年第10期65卷 1843-1853页

作者： Wan-Ying Yang Chang-Cun Yan Xue-Dong Wang Liang-Sheng Liao institute of functional nano&soft materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao institute of materials Science and Engineering Macao University of Science and TechnologyTaipa 999078China

In contrast to the widely reported excited-state single proton-transfer,excited-state multiple proton transfer(ESMPT)containing two or more intra-or inter-molecular proton transfers has greatly expanded the research scope of the excited-state proton *** recent decades,ESMPT-active organic molecules have attracted much attention owing to their unique photophysical properties,such as large magnitude Stokes shifts and dual *** photophysical properties facilitate the application of the organic molecules in organic solid-state lasers,fluorescent probes and sensors,and molecular ***,we introduce the fundamentals of the ESMPT and review the recent advances in different types of ESMPTs in organic ***,we present our conclusions and the future development prospects of the ESMPT in organic molecules.

关键词： excited-state multiple proton transfer hydrogen bond photoisomerization organic molecules photophysical properties

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Organic white-light sources:Multiscale construction of organic luminescent materials from molecular to macroscopic level

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Science China Chemistry 2022年第4期65卷 740-745页

作者： Song Chen Xue-Dong Wang Ming-Peng Zhuo Qiang Lv Jing-Feng Liu Liang-Sheng Liao Jiangsu Key Laboratory for Carbon-Based functional materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhou 215123China Macao institute of materials Science and Engineering Macao University of Science and TechnologyTaipa 999078China

Organic luminescent materials play an integral role in the optoelectronic applications of displays and solid-state ***, high-performance organic luminescent materials require the efficient combination of two or more kinds of materials, which is extremely difficult owing to the completely different self-assembly behaviors of multicomponent ***, based on a broad scale from the molecular, micro-/nano-scale, and macroscopic levels, we successfully demonstrate the multiscale construction of organic luminescent microwires of cocrystals, solid solutions, and core-shell microstructures. Through the wide selection of electron donor/acceptor pairs, a series of color-tunable charge-transfer(CT) cocrystals are formed via the intermolecular cooperative self-assembly process. On this basis, the high structural compatibility and perfect lattice mismatching(~1.1%) of cocrystals are critical factors that facilitate the combination of dissimilar materials to form solid solutions and core/shell microwires. Significantly, because of the full-spectrum light transport from 400 to 800 nm, the nano-micro-scaled solid solution microwires act as microscale white-light sources [CIE(0.32, 0.36)]. Meanwhile, the macroscopic-scale core/shell organic-microwires demonstrate tunable white-light emission with a high color-rendering index(CRI) of 83, whose CIE coordinates span from(0.37, 0.39) to(0.40, 0.31). Therefore, our work provides a feasible approach to the multiscale synthesis of novel luminescent organic semiconductor materials, which could lay a solid foundation for organic optoelectronics.

关键词： noncovalent interaction multiscale self-assembly core/shell solid solution white-light emission

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Cooperative interactions among CTA^＋, Br^-and Ag^＋ during seeded growth of gold nanorods

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nano Research 2017年第6期10卷 2146-2155页

作者： Yong Xu Lei Chen Xingchen Ye Xuchun Wang Jiaqi Yu Yang Zhao Muhan Cao Zhouhui Xia Baoquan Sun Qiao Zhang Jiangsu Key Laboratory for Carbon-Based functional materials & Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Suzhou 215123 China Department of Chemistry University of California Berkeley Berkeley CA 94720 USA

We have carried out a comprehensive study on the formation mechanism of Au nanorods （AuNRs） in binary surfactant mixtures composed of quaternary ammonium halide and sodium oleate （NaOL）. We identify the cetyltrimethyl ammonium （CTA）-Br-Ag^＋ complex as the key ingredient in directing the anisotropic growth of AuNRs. Based on the improved understanding of the cooperative interactions among CTA^＋, Br^- and Ag^＋, we further demonstrate that AgBr, which is readily solubilized by the cetyltrimethyl ammonium bromide （CTAB） or cetyltrimethyl ammonium chloride （CTAC） micelles, can be employed as the combined source of Ag^＋ and Br^- for the preparation of AuNRs. The growth of high-quality AuNRs can be completed within 15 min under extremely low bromide content （0.1 mM）.

关键词： gold nanorods anisotropic nanostructure surface plasmon resonance seeded growth cetyltrimethyl ammoniumbromide (CTAB)

Recent Progresses on the High Performance Organic Electrochemical Transistors

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Chemical Research in Chinese Universities 2021年第5期37卷 975-988页

作者： JIANG Xingyu WANG Qi WANG Zi DONG Bin HUANG Lizhen CHI Lifeng institute of functional nano&soft materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123P.R.China

Organic electrochemical transistor(OECT)with bulk current modulation capability based on the ion penetration into the organic semiconducting channel exhibits unique features,including high transconductance,low voltage and large *** high current at a low voltage,together with the compatibility with aqueous environment,makes OECT particularly suitable for bioelectronic applications,such as biological interfacing,printed logic circuitry and neuromorphic devices.

关键词： transistor capacitance compatibility