國家衛生研究院 NHRI:Item 3990099045/6698
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/6698


    Title: Formation of CdSe/CdS/ZnS-Au/SiO2 dual-yolk/shell nanostructures through a Trojan-type inside-out etching strategy
    Authors: Huang, CM;Cheng, SH;Jeng, US;Yang, CS;Lo, LW
    Contributors: Division of Medical Engineering Research
    Abstract: In this work we report the development of a rapid and selective etching strategy to synthesize a dual-yolk/shell nanostructure consisting of semiconductor-metal hybrid nanocrystals and hollow SiO 2 for the first time. By utilizing CdSe/CdS/ZnS quantum dot (CSSQD)/SiO 2 core/shell nanoparticles as the template and aurate hydroxyl complexes [Au(OH) 4 -] as the Trojan-type inside-out etching agent, rapid formation of CSSQD-Au hybrid nanocrystal dual-yolk and SiO 2 hollow shell occur during the reduction of Au(OH) 4 - on CSSQD cores accompanied by localized hydroxyl-liberation from Au(OH) 4 - at the interface between silica and CSSQD. Unlike surface-protected etching strategies, a selective as well as directional etching takes place from the silica internal surface and the thickness of the silica shell can be controlled by varying the etching time. Moreover, the size of attached Au nanoclusters can be tuned by subsequent light exposure. Consequently, the resulting platform offers a number of attractive features: (1) a new, directional, and rapid etching approach toward the formation of hollow silica nanostructures in solution; (2) semiconductor/metal hybrid nanocrystals as yolks within hollow silica nanospheres have been reported for the first time; and (3) the ability, through light exposure, to tune the size of the attached metal nanoclusters on the encapsulated CSSQD within the hollow silica nanospheres. Most importantly, the synthetic method has the capability of introducing additional guest species (e.g. metals) into a primary yolk (e.g. semiconductor) of hollow silica nanoparticles, potentially leading to many promising applications in fuel cells, photocatalysis, bioimaging, and cancer therapy.
    Date: 2012-09
    Relation: Nano Research. 2012 Sep;5(9):654-666.
    Link to: http://dx.doi.org/10.1007/s12274-012-0229-y
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1998-0124&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000308967500008
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84864865632
    Appears in Collections:[Leu-Wei Lo] Periodical Articles
    [Chung-Shi Yang] Periodical Articles

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