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Rücktitelbild: Anomalous Structural Transformation of Cu(I) Clusters into Multifunctional CuAg Nanoclusters (Angew. Chem. 36/2024)

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Angewandte Chemie 2024年第36期136卷

作者： Yuqing Yao Wei Hao Jin Tang Kristin Kirschbaum Christopher G. Gianopoulos An Ren Liang Ma Letian Zheng Hanying Li Qi Li Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China Department of Chemistry and Biochemistry University of Toledo Toledo Ohio 43606 United States The State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical Engineering Zhejiang University Hangzhou 310027 China

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Macroscopic-Assembled-Graphene Nanofilms/Germanium Broadband Photodetectors

Macroscopic-Assembled-Graphene Nanofilms/Germanium Broadband...

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International Electron Devices Meeting (IEDM)

作者： Lixiang Liu Xiaoxue Cao Li Peng Srikrishna Chanakya Bodepudi Shaoxiong Wu Wenzhang Fang Junxue Liu Yejun Xiao Xiaochen Wang Zengfeng Di Ran Cheng Yang Xu Chao Gao Bin Yu School of Micro-Nano Electronics ZJU-UIUC Joint Institute State Key Laboratory of Silicon Materials ZJU-Hangzhou Global Scientific and Technological Innovation Center MOE Key Laboratory of Macromolecular Synthesis and Functionalization Zhejiang University Hangzhou China State Key Laboratory of Molecular Reaction Dynamics and Dynamics Chinese Academy of Sciences Dalian China State Key Laboratory of Functional Materials for Informatics Chinese Academy of Sciences Shanghai China

ISBN: (纸本)9781665425735

Germanium (Ge) based devices are widely used in optical communications and image sensors due to the brilliant properties of Ge (high carrier mobility, excellent CMOS compatibility). Here, by integrating Ge with the nanofilms of macroscopic-assembled-graphene (nMAG) - large-scale highly crystalline graphene nanofilm, we demonstrated a high-performance Schottky diode. The device shows a detection bandwidth of 1.5 to 4 $\mu{\mathrm{m}}$ with responsivities ranging from 1.1 A/W to 40 mA/W and specific detectivity between 10 11 to 10 9 Jones, and a rising time of ~80 ns at room temperature. Such performance is a result of the broadband and strong absorption, the long carrier relaxation time (20 ps) of nMAG, and the low Schottky barrier of $n$ MAG/Ge junction. The broadband detection range of this detector is comparable to the state-of-the-art Ge-based IR photodiodes.

关键词： Temperature distribution Schottky diodes Schottky barriers Detectors Dark current Germanium Broadband communication

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Unsymmetrically Chlorinated Non-Fused Electron Acceptor Leads to High-Efficiency and Stable Organic Solar Cells

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Angewandte Chemie 2022年第5期135卷

作者： Dr. De-Li Ma Qian-Qian Zhang Prof. Chang-Zhi Li State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. China

Searching the cost-effective organic semiconductors is strongly needed in order to facilitate the practice of organic solar cells (OSCs), yet to be fulfilled. Herein, we have succeeded in developing two non-fused ring electron acceptors (NFREAs), leading to the highest efficiency of 16.2 % for the NFREA derived OSCs. These OSCs exhibit the superior operational stabilities under one sun equivalent illumination without ultraviolet (UV) filtration. It is revealed that the modulation of halogen substituents on aromatic side chains, as the new structural tool to tune the intermolecular interaction and optoelectronic properties of acceptors, not only promotes the interlocked tic-tac-toe frame of three-dimensional stacks in solid, but also improves charge dynamics of acceptors to enable high-performance and stable OSCs.

关键词： 3D Network Chlorination Non-Fused-Ring Acceptor Organic Solar Cells Single Crystal

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Functional delivery vehicle of organic nanoparticles in inorganic crystals

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Chinese Chemical Letters 2019年第12期30卷 2351-2354页

作者： Linlin Kong Xinyi Jin Dapeng Hu Leyun Feng Dong Chen Hanying Li Institute of Process Equipment College of Energy EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China MOE Key Laboratory of Macromolecular Synthesis and Functionalization State Key Laboratory of Silicon MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Encapsulation of bioactive substances for extended shelf life and controlled,targeted release is critical for their applications in food and drug ***,a new method has been developed to encapsulate bioactive molecules in the crystal composites,showing greatly enhanced stability and unique pHtriggered ***,a model bioactive,is first loaded in shellac nanoparticles via coprecipitation with a high encapsulation efficiency,and then the chlorophyll-loaded nanoparticles are incorporated into calcite crystals grown from a gel media containing the *** the protection of shellac nanoparticles and calcite crystals,chlorophyll shows excellent stability even under *** chlorophyll could only be released by first dissolving the calcite crystals under acidic condition and then dissolving the shellac nanoparticles under alkaline *** unique pHtriggered release mimics the pH change from acidic in the stomach to alkaline in the intestine and is thus well suited for controlled,targeted intestinal *** work suggests that the crystal composites are an ideal delivery vehicle for the functional design of bioactive molecules.

关键词： Nanoparticle Calcite crystal Encapsulation Chlorophyll Dual-pH responses

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Back Cover: Anomalous Structural Transformation of Cu(I) Clusters into Multifunctional CuAg Nanoclusters (Angew. Chem. Int. Ed. 36/2024)

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Angewandte Chemie International Edition 2024年第36期63卷

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A Facile and Unprecedented Route to a Library of Thermostable Formaldehyde-Derived Polyesters: Highly Active and Selective Copolymerization of Cyclic Acetals and Anhydrides

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Angewandte Chemie 2022年第13期134卷

作者： Xun Zhang Chengjian Zhang Xinghong Zhang MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X Polymers Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

The development of new strategies for producing polyesters can expand the category of biodegradable materials. Here, we disclose the alternating copolymerization of cyclic acetals (made from formaldehyde and diols) and anhydrides for the first time, using 5 cyclic acetals and 9 anhydrides to afford 45 unprecedented polyesters. At a wide range of reaction temperatures (25 to 140 °C), diverse metal-free Lewis/Brønsted acids are highly active catalysts for these copolymerizations via the cationic mechanism. Of interest, kinetic studies indicate that the copolymerization of cyclic acetals and anhydrides shifts the chemical equilibrium of “cyclic acetals ⇌ polyacetals” to the left, thus yielding polyesters with up to >99 % alternating degree. The obtained polyesters possess high oxygen content ([O] : [C] up to 6 : 7), molecular weights of 2.0–33.3 kDa, narrow polydispersities of 1.2–1.5, low glass transition temperatures (−64 to −27 °C), as well as high decomposition temperatures (275 to 324 °C).

关键词： Alternating Copolymerization Cyclic Acetals Cyclic Anhydrides Polyester Sustainable Materials

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Controllable Bending of Bi-hydrogel Strips with Differ ent ial Swelling

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Acta Mechanica Solida Sinica 2019年第5期32卷 652-662页

作者： Yi Wu Xingpeng Hao Rui Xiao Ji Lin Zi Liang Wu Jun Yin Jin Qian Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Department of Engineering MechanicsZhejiang UniversityHangzhou 310027China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Fluid Power and Mechatronic Systems Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityHangzhou 310028China

Bi-hydrogel strips consisting of a highly swelling layer and a non-swelling layer are investigated in this study,in which the differential swelling capabilities and mismatch strain in the composite structure drive the strips into a bending configuration when being exposed to solvents.A modified analytical model originated from Timoshenko theory on bi-material beam is proposed to predict the swelling-induced bending shape of the bi-hydrogel strips,with explicit relations of bending curvature and mid-span deflection versus mismatch *** sets of experiments were performed to verify the analytical model and its solutions,in which the swellinginduced mismatch strain was systematically tuned by the selection of saline *** broad agreements bet ween the t heore tical and experimen tai results indicate that the modified analytical model can be used to guide the design of morphing elements by modulating layer-bylayer mismatches in gel composites to produce precise and complex shape transformations for practical applications.

关键词： Bi-hydrogel strip Hydrogel swelling Mismatch strain Shape morphing Analytical model

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Correction: Encapsulation of a photosensitizer into cell membrane capsules for photodynamic therapy

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RSC advances 2024年第39期14卷 28956页

作者： Lijie Han Ying Chen Jie Niu Lihua Peng Zhengwei Mao Changyou Gao Department of Polymer Science and Engineering MOE Key Laboratory of Macromolecular Synthesis and Functionalization Zhejiang University Hangzhou 310027 China zwmao@*** +86-571-87951108. Institute of Pharmaceutics College of Pharmaceutical Sciences Zhejiang University Hangzhou P. R. China.

[This corrects the article DOI: 10.1039/C6RA07480D.].

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HCAⅡ-inspired Catalysts for Making Carbon Dioxide-based Copolymers:The Role of Metal-hydroxide Bond

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Chinese Journal of Polymer Science 2018年第2期36卷 139-139,140-148页

作者： Yang Li Ying-Ying Zhang Bin Liu Xing-Hong Zhang Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science&EngineeringZhejiang UniversityHangzhou 310027China

The general characteristics of the active center of the catalysts（including zinc-cobalt（III） double metal cyanide complex [Zn-Co（Ⅲ） DMCC]） for the copolymerization reaction of carbon dioxide（CO2） with epoxide are summarized. By comparing the active center, catalytic performance of the Zn-Co（Ⅲ） DMCC（and other catalysts） with HCAII enzyme in the organism for activating CO2（COS and CS2）, we proposed that the metal-hydroxide bond（M-OH）, which is the real catalytic center of human carbonic anhydride Ⅱ（HCAⅡ）, is also the catalytic（initiating） center for the copolymerization. It accelerates the copolymerization and forms a closed catalytic cycle through the chain transfer reaction to water（and thus strictly meets the definition of the catalyst）. In addition, the metal-hydroxide bond catalysis could well explain the oxygen/sulfur exchange reaction（O/S ER） in metal（Zn, Cr）-catalyzed copolymerization of COS（and CS2） with epoxides. Therefore, it is very promising to learn from HCAⅡ enzyme to develop biomimetic catalyst for highly active CO2/epoxide copolymerization in a well-controlled manner under mild conditions.

关键词： Carbon dioxide Carbonic anhydrase （CA） Copolymerization Metal-hydroxide bond

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pH-Responsive supramolecular micelle based on host-guest interaction of poly(β-amino ester) derivatives and adamantyl-terminated poly(ethylene glycol) for cancer inhibition

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Chinese Chemical Letters 2018年第12期29卷 1839-1844页

作者： Zhuting Yang Yan Peng Liyan Qiu Ministry of Educational (MOE) Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University

Supramolecular structures have received growing attention and been widely applied in many ***, we synthesized hydrophobic β-cyclodextrin-contained poly(β-amino ester)(PAE-β-CD) and hydrophilic adamantyl-terminated poly(ethylene glycol)(PEG-AD) to form a supramolecular micelle via the host-guest interaction. The micelle displayed pH responsive structure change due to the transform of hydrophobic PAE core to hydrophilic form in weakly acid condition. After the anticancer drug curcumin(Cur) was loaded into the micelle, the drug release behavior of the Cur-loaded micelle was studied, and it turned out that the Cur-loaded supramolecular micelle could effectively unload the drug at pH ***, the antitumor efficiency of the Cur-loaded micelle was also examined both in vitro and in vivo, indicating considerable inhibition ratio as high as 62.14% against mouse sarcoma 180.

关键词： Supramolecules Micelle Poly(β-amino ester) pH-Sensitive β-Cyclodextrin Curcumin

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