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Host–Guest Molecular Recognition at Liquid–Liquid Interfaces

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Engineering 2021年第5期7卷 603-614页

作者： Beibei Wang Hao Chen Tan Liu Shaowei Shi thomas p.russell Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Department of polymer Science and Engineering University of MassachusettsAmherstMA 01003USA Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA

Host–guest molecular recognition at the liquid–liquid interface endows the interface with unique properties,including stimuli-responsiveness and self-regulation,due to the dynamic and reversible nature of non-covalent *** research efforts have been put into the preparation of supramolecular interfacial systems such as films and microcapsules by integrating functional components(e.g.,colloidal particles,polymers)at the interface,providing tremendous opportunities in the areas of encapsulation,delivery vehicles,and biphasic reaction *** this review,we summarize recent progress in supramolecular interfacial systems assembled by host–guest chemistry,and provide an overview of the fabrication process,functions,and promising applications of the resultant constructs.

关键词： Liquid-liquid interface Self-assembly Host-guest chemistry Microcapsules

Laser-Induced Recoverable Fluorescence Quenching of perovskite Films at a Microscopic Grain Scale

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Energy & Environmental Materials 2022年第4期5卷 1189-1199页

作者： Yuren Xiang Yameng Cao Wenqiang Yang Rui Hu Sebastian Wood Bowei Li Qin Hu Fan Zhang Jujie He Mozhgan Yavari Jinlai Zhao Yunlong Zhao Jun Song Junle Qu Rui Zhu thomas p.russell S.Ravi p.Silva Wei Zhang Center for Biomedical Optics and photonics(CBOp)&College of physics and Optoelectronic Engineering Key Laboratory of Optoelectronic Devices and SystemsShenzhen UniversityShenzhen 518060China Advanced Technology Institute University of SurreyGuildford GU27XHUK National physical Laboratory Hampton RoadTeddington TW110LWUK Department of polymer Science and Engineering University of MassachusettsAmherst MA 01003USA State Key Laboratory for Artificial Microstructure and Mesoscopic physics School of PhysicsPeking UniversityBeijing 100871China College ofmaterials science and engineering Shenzhen Key laboratory of Polymer Science and TechnologyGuangdong Research Center for interfacial Engineering of FunctionalMaterialsShenzhen UniversityShenzhen 518060China

Understanding the fundamental properties of metal-halide perovskite materials is driving the development of novel optoelectronic ***,we report the observation of a recoverable laser-induced fluorescence quenching phenomenon in perovskite films with a microscopic grain-scale restriction,accompanied by spectral *** fluorescence quenching depends on the laser intensity and the dwell time under Auger recombination dominated *** features indicate that the perovskite lattice deformation may take the main responsibility for the transient and show a new aspect to understand halide perovskite *** further modulate this phenomenon by adjusting the charge carrier recombination and extraction,revealing that efficient carrier transfer can improve the bleaching resistance of perovskite *** results provide future opportunities to attain high-performance devices by tuning the perovskite lattice disorder and harvesting the energetic carriers.

关键词： fluorescence quenching perovskite photophysics stability

Nanomechanical and Chemical Mapping of the Structure and Interfacial properties in Immiscible Ternary polymer Systems

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Chinese Journal of polymer Science 2021年第6期39卷 651-658,I0004页

作者： Hao-Xuan Li thomas prussell Dong Wang State Key Laboratory of Organic-Inorganic Composites&Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China polymer Science and Engineering Department University of Massachusetts AmherstMassachusetts 01003United States Materials Sciences Division Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCalifornia 94720United States

It is a challenge to identify each phase in a multi-component polymer system and uniquely determine the interfacial properties between the different *** atomic force microscopy nanomechanical mapping(AFM-NM)and AFM-based infrared spectroscopy(AFM-IR),we identify each phase,visualize structural developments,and determine the interfacial properties in a blend of three polymers:high-density polyethylene(HDpE),polyamide(pA6)and poly(styrene-b-ethylene-co-butylene-b-styrene)(SEBS).Each phase can be identified from the Young’s modulus,along with the structural development within the phases before and after *** interfacial widths between HDpE/pA6,HDpE/SEBS and SEBS/pA6 were determined independently in one measurement from a Young’s modulus *** structural,mechanical property development and identity of the phases were determined by AFM-NM,while AFM-IR,providing complementary chemical information,identified interfacial reactions,showed the chemical affinity of a compatibilizer with the component phases,and mapped the distribution of the compatibilizer in the ternary polymer *** chemical,structural and interfacial information obtained by these measurements provide information that is essential for producing mechanically robust materials from incompatible mixtures of polymers.

关键词： AFM nanomechanical mapping AFM infrared spectroscopy Multi-component systems Interfacial structure Interfacial properties

Synergistic effect of fluorination on both donor and acceptor materials for high performance non-fullerene polymer solar cells with 13.5% efficiency

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Science China Chemistry 2018年第5期61卷 531-537页

作者： Qunping Fan Wenyan Su Yan Wang Bing Guo Yufeng Jiang Xia Guo Feng Liu thomas p.russell Maojie Zhang Yongfang Li State and Local Joint Engineering Laboratory for Novel Functional polymeric Materials Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China Department of physics and Astronomy Collaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 China Materials Sctences Division Lawrence Berkeley National Laboratory Berkeley California 94720 United States CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

A high performance polymer solar cells(pSCs) based on polymer donor pM6 containing fluorinated thienyl benzodithiophene unit and n-type organic semiconductor acceptor IT-4 F containing fluorinated end-groups were developed. In addition to complementary absorption spectra(300–830 nm) with IT-4 F, the pM6 also has a deep HOMO(the highest occupied molecular) level(-5.50 e V), which will lower the open-circuit voltage(V_(oc)) sacrifice and reduce the E_(loss) of the IT-4 F-based pSCs. Moreover, the strong crystallinity of pM6 is beneficial to form favorable blend morphology and hence to suppress recombination. As a result, in comparison with the pSCs based on a non-fluorinated D/A pair of pBDB-T:ITIC with a medium pCE of 11.2%, the pM6:IT-4 Fbased pSCs yielded an impressive pCE of 13.5% due to the synergistic effect of fluorination on both donor and acceptor, which is among the highest values recorded in the literatures for pSCs to date. Furthermore, a pCE of 12.2% was remained with the active layer thickness of up to 285 nm and a high pCE of 11.4% was also obtained with a large device area of 1 cm^2. In addition, the devices also showed good storage, thermal and illumination stabilities with respect to the efficiency. These results indicate that fluorination is an effective strategy to improve the photovoltaic performance of materials, as well as the both fluorinated donor and acceptor pair-pM6:IT-4 F is an ideal candidate for the large scale roll-to-roll production of efficient pSCs in the future.

关键词：氟化作用太阳能电池聚合物施主材料 pSC pM6 pCE

26mA cm^(-2) J_(sc) from organic solar cells with a low-bandgap nonfullerene acceptor

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Science Bulletin 2017年第22期62卷 1494-1496页

作者： Zuo Xiao Xue Jia Dan Li Shizhe Wang Xinjian Geng Feng Liu Junwu Chen Shangfeng Yang thomas p.russell Liming Ding Center for Excellence in Nanoscience (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS)National Center for Nanoscience and Technology Department of Materials Science and Engineering University of Science and Technology of China Department of physics and Astronomy Shanghai Jiaotong University State Key Laboratory of Luminescent Materials and Devices South China University of Technology Department of polymer Science and Engineering University of Massachusetts

Nonfullerene-based organic solar cells(NFOSCs)have received great interest recently due to their higher performance and greater potential compared with fullerene-based solar cells[1].power conversion efficiencies(pCEs)over 13% have been realized in single-junction NFOSCs[2].Compared with traditional fullerene acceptors,the greatest advantage of nonfullerene acceptors is their stronger light-harvesting capability in the visible and

关键词： pTB Th sc from organic solar cells with a low-bandgap nonfullerene acceptor DIO pCE

Synthesis and Characterization of Bionanoparticle-Silica Composites and Mesoporous Silica with Large pores

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Nano Research 2009年第6期2卷 474-483页

作者： Zhongwei Niu Saswat Kabisatpathy Jinbo He LAndrew Lee Jianhua Rong Lin Yang Godfrey Sikha Branko N.popov Todd S.Emrick thomas p.russell Qian Wang Department of Chemistry and Biochemistry and Nanocenter University of South CarolinaColumbiaSC 29208USA Department of polymer Science and Engineering University of MassachusettsAmherstMA 01003USA Brookhaven National Laboratory UptonNY 11973USA Department of Chemical Engineering University of South CarolinaColumbiaSC 29208USA

A sol-gel process has been developed to incorporate bionanoparticles,such as turnip yellow mosaic virus,cowpea mosaic virus,tobacco mosaic virus,and ferritin into silica,while maintaining the integrity and morphology of the *** structures of the resulting materials were characterized by transmission electron microscopy,small angle X-ray scattering,and N2 adsorption desorption *** results show that the shape and surface morphology of the bionanoparticles are largely preserved after being embedded into *** removal of the bionanoparticles by calcination,mesoporous silica with monodisperse pores,having the shape and surface morphology of the bionanoparticles replicated inside the silica,was produced,.This study is expected to lead to both functional composite materials and mesoporous silica with structurally well-defi ned large pores.

关键词： Mesoporous silica bionanoparticles virus ferritin sol gel

纳米粒子液/液界面自组装:结构化液体的设计与构筑

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科技导报 2020年第17期38卷 115-126页

作者：刘倓史少伟 thomas p.russell 北京化工大学北京软物质科学与工程高精尖创新研究中心北京100029 马萨诸塞大学阿默斯特分校高分子科学与工程系美国阿默斯特01003

概述了利用纳米粒子与高分子配体液/液界面协同组装构筑新型结构化液体的研究进展;分析了结构化液体在封装、分离、催化、储能、生物医学等领域展现出的广阔应用前景;指出新型纳米粒子表面活性剂的开发、多重响应型结构化液体的构筑及... 详细信息

概述了利用纳米粒子与高分子配体液/液界面协同组装构筑新型结构化液体的研究进展;分析了结构化液体在封装、分离、催化、储能、生物医学等领域展现出的广阔应用前景;指出新型纳米粒子表面活性剂的开发、多重响应型结构化液体的构筑及其应用拓展等将成为未来结构化液体研究的重点方向。

关键词：纳米粒子液/液界面自组装结构化液体堵塞相变

界面稳定化策略实现长期稳定的反式钙钛矿太阳能电池

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Science Bulletin 2021年第10期66卷 991-1002,M0004页

作者：陈伟韩兵胡琴谷猛朱煜东杨文强周业城罗德映刘芳舟程睿朱瑞馮憲平 Aleksandra B.Djurisic thomas p.russell 何祝兵 Department of Materials Science and Engineering Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation(FSSEG)Southern University of Science and TechnologyShenzhen 518055China Department of physics The University of Hong KongHong KongChina Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA State Key Laboratory for Artificial Microstructure and Mesoscopic physics Department of PhysicsPeking UniversityBeijing 100871China Department of physics Southern University of Science and TechnologyShenzhen 518055China Department of Mechanical Engineering The University of Hong KongHong KongChina Department of polymer Science and Engineering University of MassachusettsAmherstMA 01003USA School of Microelectronics University of Science and Technology of ChinaHefei 230026China

钙钛矿中卤素离子容易扩散穿透电荷传输层并腐蚀金属背电极,任何结构的钙钛矿太阳能电池因此都具有较差的器件稳定性.解决钙钛矿器件长期运行稳定性是实现其未来大规模商业化的关键因素之一.本文采用了一种电子传输侧界面稳定化策略,可... 详细信息

钙钛矿中卤素离子容易扩散穿透电荷传输层并腐蚀金属背电极,任何结构的钙钛矿太阳能电池因此都具有较差的器件稳定性.解决钙钛矿器件长期运行稳定性是实现其未来大规模商业化的关键因素之一.本文采用了一种电子传输侧界面稳定化策略,可以同时大幅提高器件效率和长期稳定性.该策略是在钙钛矿和富勒烯(C_(60))电子传输层之间引入了一种化学和光学更稳定的有机小分子电子传输材料Cl_(6)Subpc.它不仅起到了钝化钙钛矿表面的作用,还有效地抑制了卤素离子扩散.使用Cl_(6)Subpc/C_(60)复合电子传输层的器件可以获得22%的冠军光电转换效率和21.3%第三方认证效率,显著高于C_(60)单层参比器件效率.同时,器件在连续模拟太阳光照的条件下衰减至初始效率90%的时间(T_(90))达到2034h,暗态氮气氛围下7000h后仍维持初始效率的99%,氮气氛围里加热2000小时后依然保持初始效率的80%.另外,满足ISOS-O-1测试标准的户外稳定性T_(95)达到1272 h,更加严苛的双85稳定性测试T_(80)达到816 h.究其稳定机制,本文采用高分辨透射电子显微镜揭示了界面二维和三维钙钛矿晶粒的晶格近原子像,同时通过其附带的电子能量损失光谱原位成像了碘离子迁移确凿证据.进一步结合X射线光电子能谱、二次离子质谱以及密度泛函计算等手段揭示Cl_(6)Subpc中硼和氮原子与碘离子结合是阻挡碘离子迁移的关键原因.本文的研究结果将极大推动钙钛矿太阳能电池技术发展,使其技术商业化进程又向前迈进了坚实的一步.

关键词：钙钛矿太阳能电池光电转换效率 X射线光电子能谱电子传输材料第三方认证卤素离子碘离子二次离子质谱

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基于液-液界面的主-客体分子识别

Engineering 2021年第5期 131-154页

作者：王贝贝陈浩刘倓史少伟 thomas p.russell Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Materials Science and Engineering Beijing University of Chemical Technology Department of polymer Science and Engineering University of Massachusetts Materials Sciences Division Lawrence Berkeley National Laboratory

由于动态和可逆的性质,主-客体识别作为一种非共价键相互作用,赋予了液-液界面独特的性质,包括刺激响应性和自调节性等。近年来,越来越多的研究致力于通过在液-液界面上集成功能性单元(如胶体粒子、聚合物)来构筑二维薄膜和微胶囊等超... 详细信息

由于动态和可逆的性质,主-客体识别作为一种非共价键相互作用,赋予了液-液界面独特的性质,包括刺激响应性和自调节性等。近年来,越来越多的研究致力于通过在液-液界面上集成功能性单元(如胶体粒子、聚合物)来构筑二维薄膜和微胶囊等超分子界面体系,这为物质封装、递送、双相反应器等领域提供了重要的发展机遇。在本文中,我们总结了近年来基于主-客体相互作用构筑超分子界面体系的研究进展,并对其制备方法、功能和应用进行了概述。

关键词：液-液界面自组装主-客体化学微胶囊