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Structural and Interfacial Effects on Drug Release Kinetics of Liquid‑Based fibrous Catheter

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Advanced fiber Materials 2022年第6期4卷 1645-1655页

作者： Chunyan Wang Yaqi Hou Xingyi Wang Weijun Li Yunmao Zhang Shuli Wang Jing zheng Xu Hou College of chemistry and Chemical Engineering State Key Laboratory of Physical Chemistry of Solid SurfacesXiamen UniversityXiamen 361005China Collaborative Innovation Center of chemistry for Energy Materials Xiamen UniversityXiamen 361005China department of Electronic Science Fujian Engineering Research Center for Solid‑State LightingSchool of Electronic Science and EngineeringXiamen UniversityXiamen 361005China College of physical Science and Technology Xiamen UniversityXiamen 361005China

Catheterization is indispensable in the field of modern ***,catheter-related thrombosis and infections almost inevitably occur during the process,and as drugs can only be administered at the end of catheter,auxiliary strategies are required for successful *** these intractable limitations,a type of self-adaptive,anti-coagulate liquidbased fibrous catheter has been *** importantly,it has positional drug release property that traditional catheters desperately need but couldn’t *** enlightening,the feasibility and performance of the positional drug release have only been demonstrated by fluorescents,the specific drug release kinetics remains unknown for adaptation to application ***,we systematically investigate the structural and interfacial effects of drug molecules and fibrous matrixes on drug release kinetics in a liquid-based fibrous *** calculations and experiments demonstrate that oleophilic and hydrophilic molecules release slowly due to a dissolution-diffusion *** molecules,however,will significantly affect the gating performance by affecting the interfacial stability,hence they release quickly with emulsifying the gating *** the significant impact of molecular properties and interfacial effects,matrix pore size also has a slight influence that molecules release faster in bigger *** this study,the liquid-based fibrous catheter may step further toward practical applications including chemotherapy,haemodialysis,angiography,*** overcome the existing catheter-related limitations.

关键词： Liquid-based materials Electrospinning fibrous materials Catheter Drug release

Atomically Precise Insights into Metal–Metal Bonds Using Comparable Endo-Units of Sc_(2) and Sc_(2)C_(2)

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CCS chemistry 2021年第12期3卷 294-302页

作者： Yang-Rong Yao Xiang-Mei Shi Shan-Yu zheng Zuo-Chang Chen Su-Yuan Xie Rong-Bin Huang Lan-Sun zheng state key Lab for physical chemistry of solid surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005

The precise identification of metal-metal bonds is critical to fully understanding the nature of metal-metal bonding but remains a fundamental ***,we show the essence of Sc-Sc bonds with a metal-metal distance of 3.36... 详细信息

关键词： endohedral fullerenes metal–metal bond X-ray single-crystal diffraction metal carbide scandium

P-modified cobalt oxide: A novel and effective catalyst for oxidative dehydrogenation of propane

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Chinese Chemical Letters 2013年第9期24卷 789-792页

作者： Xiao-Zhang Lin Guang-Chao Li Chuan-Jing Huang Wei-zheng Weng Hui-Lin Wan state key laboratory of physical chemistry of solid surfaces National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University

A series ofnanosized cobalt oxide catalysts modified with phosphorus have been synthesized by the solgel method and investigated in the oxidative dehydrogenation of propane to propene. With the addition of phosphorus, the crystallite size of the catalyst was largely decreased, while the P species in the catalyst were highly dispersed. Compared to pure cobalt oxide, the P-modified samples showed higher propane conversion and enhanced propene selectivity. Over the PCoO catalyst with a P/Co atomic ratio of 0.05, the maximal propene yields of 15.7% with a propane conversion of 28.3% were obtained at 520 ℃.

关键词： Propane Propene Oxidative dehydrogenation Nanosized PCoO catalyst

A lanthanide-titanium oxo cluster-polymer composite:from clusters to fluorescent ink

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Science China Materials 2021年第11期64卷 2883-2888页

作者： Yongkai Deng Xin zheng Hao zheng Han Xu fushan Li Lasheng Long Lansun zheng Collaborative Innovation Center of chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid SurfacesDepartment of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Institute of Optoelectronic Technology Fuzhou UniversityFuzhou 350116China

fluorescent ink has become an effective anti-counterfeiting material to prevent counterfeiters from making and selling fake products[1–4].from its practical application,an ideal fluorescent ink should be environmentally friendly,have high stability and good viscosity,and exhibit excellent luminescent *** obtain such fluorescent inks,different fluorescent materials,such as carbon dots[5–7],lanthanide-doped compounds[8–10],inorganic semiconductor complexes[11–13],organic dyes[14–16],metal-organic frameworks[17–19],lanthanide coordination compounds[20,21]and cluster compounds[22,23],have been used to prepare fluorescent *** these fluorescent materials have their own advantages as fluorescent inks,they also have their own *** example,organic dyes used as fluorescent inks often encounter the problems of aggregation-induced quenching and small Stokes shifts[14–16],while carbon dots suffer from unclear structures,and concerns about the reproducibility of carbon dots have affected their widespread use[5,6].

关键词：荧光油墨高分子复合材料甲氧基聚乙二醇喷墨打印极性溶剂成膜性能琥珀酰亚胺量子产率

Strain tuned efficient heterostructure photoelectrodes

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Chinese Chemical Letters 2022年第3期33卷 1450-1454页

作者： Haihong zheng Mingyang Li Jinsong Chen Anchang Quan Kaihang Ye Hang Ren Sheng Hu Yang Cao state key laboratory of physical chemistry of solid surfaces Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China department of chemistry University of Texas at AustinAustinTX 78712United States Guangzhou key laboratory of Clean Transportation Energy chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China

van der Waals (vdWs) heterostructures based on two-dimensional (2D) materials have become a promising candidate for photoelectrochemical (PEC) catalyst not only because of the freedom in materials design that enable the band-offset construction and facilitate the charge separation. They also provide a platform for the study of various of interface effect in PEC. Here, we report a new kind of mixed-dimensional vdWs heterostructure photoelectrode and investigate the strain enhanced PEC performance at vdWs interfaces. Our heterostructures are composed of 2D n-type MoS_(2) nanosheets and three-dimensional (3D) p-type Cu_(2)O nanorod arrays (NRAs), where Cu_(2)O NRAs introduce periodically strain in the p-n junction interface. We find a promotion of the HER catalytic activities in heterostructure based PEC photoelectrodes using in-situ measurement techniques including the scanning electrochemical cell microscopy and various local spectrum probe measurements. This is attributed to the efficient charge separation at the strained heterointerface. Our results demonstrate an interesting venue for understanding the local interface effects with high spatial resolution, and shed light on design and developing high-efficiency photoelectrodes. 1L MoS_(2)/Cu_(2)O vdWs heterostructure photocathodes were prepared by nanoindentation technology. The effects of strain on promoting charge separation at the heterointerface were verified by the enhanced performances in PEC hydrogen evolution reaction of vdWs heterostructure through scanning electrochemical cell microscopy technique and various local spectrum probe measurements.

关键词： Photoelectrochemical water splitting van der Waals heterostructures Two-dimensional MoS_(2) Strain engineering Scanning electrochemical cell microscopy

Interface engineering of Zn meal anodes using electrochemically inert Al_(2)O_(3)protective nanocoatings

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Nano Research 2022年第8期15卷 7227-7233页

作者： Rui Wang Qiongfei Wu Minjie Wu Jiaxian zheng Jian Cui Qi Kang zhengbing Qi JiDong Ma Zhoucheng Wang Hanfeng Liang state key laboratory of physical chemistry of solid surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China key laboratory of functional Materials and Applications of fujian Province School of Materials Science and EngineeringXiamen University of TechnologyXiamen 361024China department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China

Aqueous rechargeable Zn-ion batteries are regarded as a promising alternative to lithium-ion batteries owing to their high energy density,low cost,and high ***,their commercialization is severely restricted by the Zn dendrite formation and side ***,we propose that these issues can be minimized by modifying the interfacial properties through introducing electrochemically inert Al_(2)O_(3)nanocoatings on Zn meal anodes(Al_(2)O_(3)@Zn).The Al_(2)O_(3)nanocoatings can effectively suppress both the dendrite growth and side *** a result,the Al_(2)O_(3)@Zn symmetric cells show excellent electrochemical performance with a long lifespan of more than 4,000 h at 1 mA·cm^(−2)and 1 mAh·cm^(−2).Meanwhile,the assembled Al_(2)O_(3)@Zn//V_(2)O_(5)full cells can deliver a high capacity(236.2 mAh·g^(−1))and long lifespan with a capacity retention of 76.11%after 1,000 cycles at 4 A·g^(−1).

关键词： aqueous Zn-ion batteries Zn dendrites side reactions Al2O3 protective nanocoatings interface engineering

Solvent-dependent evolution of cyclic penta-twinned rhodium icosahedral nanocrystals and their enhanced catalytic properties

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Nano Research 2018年第2期11卷 656-664页

作者： Yanan Yang Jiawei Zhang Yajing Wei Qiaoli Chen Zhenming Cao Huiqi Li Jiayu Chen Jueli Shi Zhaoxiong Xie Lansun zheng state key laboratory for physical chemistry of solid surfaces Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen China

Cyclic penta-twinned noble metal nanocrystals exhibit promising properties due to their unique geometric and electronic structures. However, the controlled synthesis of cyclic penta-twinned nanostructures, especially of noble metals with a high cohesive energy （e.g., Rh）, is very difficult, and the corresponding growth mechanism is not fully understood. Herein, we report a facile one-pot hydrothermal approach for the synthesis of cyclic penta-twinned Rh icosahedral nanocrystals. It was found that apart from regulating the surface free energy by changing the concentration or category of the capping agents, the solvent might influence the adsorption ability of the surfactant on the Rh crystal surface, which results in a change in the surface free energy and thus allows the formation of Rh cyclic penta-twinned nanostructures. In addition, due to their unique electronic and geometric structures, the Rh icosahedral nanocrystals exhibit superior catalytic activity and stability for the electrooxidation of ethanol as compared to single-crystal Rh tetrahedral nanocrystals and commercial Rh black.

关键词： Rhrcrystal growth icosahedron tetrahedron electrocatalysis

Unexpected current-voltage characteristics of mechanically modulated atomic contacts with the presence of molecular junctions in an electrochemically assisted-MCBJ

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Nano Research 2016年第2期9卷 560-570页

作者： Yang Yang Junyang Liu Shi feng Huimin Wen Jinghua Tian Jueting zheng Bernd Schollhorn Christian Amatore Zhongning Chen Zhongqun Tian department of chemistry/Pen-Tung Sah Institute of Micro-Nano Science and Technology State Key Laboratory of Physical Chemistry of Solid Surfaces and LIA CNRS NanoBioCatEchem Collaborative Innovation Center of Chemistry for Energy Materials Xiamen University Xiamen 361005 China state key laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of SciencesFuzhou 350002 China CNRS UMR 8640 PASTEUR and LIA CNRS NanoBioCatEchem Ecole Normale Superieure-PSL Research University Departement de Chimie Sorbonne Universit~s - UPMC Paris 6 24 rue Lhomond 75005 Paris France

In this article, we report on the characterization of various molecular junctions＇ current-voltage characteristics （Ⅰ-Ⅴ curves） evolution under mechanical modulations, by employing a novel electrochemically assisted-mechanically controllable break junction （EC-MCBJ） method. for 1,4-benzenedithiol, the Ⅰ-Ⅴ curves measured at constant electrode pair separation show excellent reproducibility, indicating the feasibility of our EC-MCBJ method for fabricating molecular junctions. for ferrocene-bisvinylphenylmethyl dithiol （fc-VPM）, an anomalous type of Ⅰ-Ⅴ curve was observed by the particular control over the stepping motor. This phenomenon is rationalized assuming a model of atomic contact evolution with the presence of molecular junctions. To test this hypothesized model, a molecule with a longer length, 1,3-butadiyne-linked dinuclear ruthenium（H） complex （Ru-1）, was implemented, and the Ⅰ-Ⅴ curve evolution was investigated under similar circumstances. Compared with fc-VPM, the observed Ⅰ-Ⅴ curves show close analogy and minor differences, and both of them fit the hypothesized model well.

关键词： molecular junction electrochemical deposition mechanically controllable break junction (MCBJ) ruthenium complex ferrocenyl molecular wire

Implications of Nitrogen Doping on Geometrical and Electronic Structure of the fullerene Dimers

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Chinese Journal of chemistry 2021年第1期39卷 93-98页

作者： Yin Su Zuo-Chang Chen Han-Rui Tian Yun-Yan Xu Qianyan Zhang Su-Yuan Xie Lan-Sun zheng state key Lab for physical chemistry of solid surfaces iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamenFujian 361005China

Because of its unsaturated bonds,C_(60) is susceptible to polymerize into *** implications of nitrogen doping on the geometrical and electronic structure of C_(60) dimers have been ambiguous for years.A quarter-centur... 详细信息

关键词： fullerenes Dimers Structure elucidation Density functional calculations Crystallographic structure