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A hybrid nano-assembly with synergistically promoting photothermal and catalytic radical activity for antibacterial therapy

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Chinese Chemical Letters 2022年第10期33卷 4605-4609页

作者： Yunxia Wang Chuangxin Zhang Hui Zhang Liheng Feng Libing Liu School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan 030006China Department of Nutrition and Health China Agricultural UniversityBeijing 100193China Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing 100190China

It is of great significance to develop effective antibacterial agents and methods to combat drug resistant bacterial infections due to its increasing threaten to human health and the ineffectiveness of ***,a multifunctional hybrid nano-assembly(M1-Fe NPs)based on conjugated oligomer and ferrous ion was engineered with favorable bactericidal activity for synergetic antibacterial *** chelation of ferrous ion not only enhances the photothermal conversion efficiency of M1 but also endows the nano-assembly with catalytic capability of transferring H_(2)O_(2) into stronger oxidant hydroxyl radicals(·OH).Meanwhile,the generated heat can further promote the Fenton reaction *** generating cytotoxic heat and oxidative·OH,M1-Fe NPs can effectively kill Staphylococcus aureus in vitro and in vivo with the aid of low dosage of H_(2)O_(2).The work provides a new multifunctional platform for combinational drug resistant antibacterial therapy and even antitumor therapy.

关键词： Conjugated oligomer nano-assembly Fenton reaction Photothermal therapy Bacterial infections

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Large pore volume mesoporous aluminum oxide synthesized via nano-assembly

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Science China Chemistry 2009年第12期52卷 2114-2124页

作者： WANG DingCong Fushun Research Institute of Petroleum and Petrochemicals,China Petroleum and Chemical Corporation (SINOPEC),Fushun 113001,China Fushun Research Institute of Petroleum and Petrochemicals China Petroleum and Chemical Corporation (SINOPEC) Fushun China

A new nano-assembly approach has been proposed for the preparation of macropore volume mesoporous aluminum oxide supports. Secondary nano-assembly and a frame structure mechanism for large pore volume mesoporous supports have been proposed. In a primary nano-assembly supersoluble micelle,aluminum hydroxide nanoparticles were precipitated in situ in surfactants with a volume balance (VB) less than 1,followed by secondary nano-assembly in linear and cylindrical shapes. The secondary nano-assembly of cylindrical aluminum hydroxides was calcined to form nano cylindrical aluminum oxides. For the formation of macropore volume mesoporous supports,we utilized a frame structure mechanism of mesoporous support,in which the exterior surface of the carrier may not be continuous. This macropore volume support has been used for the hydrotreatment of a residual oil catalyst,which possesses the following physical characteristics:pore volume 1.8―2.7 mL·g-1,specific surface area 180―429 m2·g-1,average pore diameter 17―57 nm,average pore diameter more than 10 nm (81%―94%),porosity 87%―93%,and crush strength 7.7―25 N·mm-1.

关键词： pore volume mesopore aluminum oxide nano-assembly supersolubility pore size porosity

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Virtual Reality Toolkit for the assembly of nanotube-based nano-electro-mechanical Systems

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Chinese Journal of Mechanical Engineering 2011年第1期24卷 1-11页

作者： GAO Zhan LECUYER Anatole ZHANG Shuyou State Key Laboratory ofCAD＆CG Zhejiang University Hangzhou 310027 China School of Computer Science and Technology Nantong University Nantong 226019 China BUNRAKU Group INRIA Campus University de Beaulieu Rennes 35042 France

nano assembly and manipulation technologies are the basis for nano-electro-mechanical systems（NEMS）. Atomic force microscope（AFM） is widely used to manipulate nanotubes to assemble NEMS. Manipulating nanotubes with AFM is a challenging and difficult task. One of the major reasons is the deficiency of visual information during the manipulation process. To address these difficulties, this research aims to put forward novel virtual tools and assembly strategies to improve the efficiency, accuracy and ease of the assembly process of NEMS. This paper begins by the discussion of the principles and implementation of a virtual nano-assembly simulator, which serves as a benchmark to test the proposed NEMS assembly techniques and virtual tools. Then, a general framework of nanotube-based NEMS assembly is proposed. Several nano-assembly strategies and virtual tools, such as automated path planning for NEMS assembly, a four-step scheme of nanotube manipulation, virtual fixtures for assembly finalization and safe manipulation, are introduced. These virtual tools and methods are experimented for justification. An assembly task of moderate complexity was performed in our virtual nano-assembly simulator with and without the help of the proposed toolkit. Experimental results suggest that the proposed methods tend to greatly enhance the efficiency and accuracy of nanotube-based NEMS assembly. In general, the proposed virtual reality toolkit not only ensures the safety, but also enhances the accuracy and efficiency of the assembly of nanotube-based NEMS.

关键词： virtual reality nano-assembly nano-electro-mechanical systems haptic feedback

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Chiral Inorganic nanostructures and Bioapplication

Chiral Inorganic Nanostructures and Bioapplication

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中国化学会第八届全国分子手性学术研讨会

作者： Hua Kuang Liguang Xu Wei Ma Chuanlai Xu State Key Laboratory of Food Science & Technology Jiangnan University

As opposed to most fluorophores that suffer from aggregation-caused quenching(ACQ),aggregation-induced emissive luminogens(AIEgens) possess very weak fluorescence in solution but show strong emission upon aggregation due to the restriction of intramolecular motion(RIM).Since AIEgens are often comprised of propeller-shaped structures,*** or tetraphenylethylene,the attachment of chiral units has recently proven a powerful tool to fabricate chiral AIEgens exhibiting circularly-polarized luminescence(CPL) and for some cases the ability for chiral *** chiral moieties lead to various assembled structures,such as helical nanoribbons,superhelical ropes,hollow and solid micro-/***,these structures exhibit enhanced chiroptical properties when compared to their monomeric *** this context,we report on a perphenylsilole derivative with side-chains bearing an enantiomerically pure mannose derivative readily assembled into superhelical ropes upon aggregation,which displayed large CPL dissymmetry factors(g) of-0.32–a record for purely organic chiral *** many biological and pharmaceutical applications,enantiorecognition is one of the most important *** AIEgens that selectively bind to one enantiomer of a chiral compound serves as a tool to easily differentiate between two *** these kinds of chiral AIEgens,they have great potential to be used in devices that can detect and potentially separate enantiomers;especially chiral drugs,biomolecules,and other chiral molecules of interest.

关键词： chiral nanomaterial plasmonic circular dichrosim nano-assembly

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