In situ growth of hollow gold-silver nanoshells within porous silica offers tunable plasmonic extinctions and enhanced colloidal stability

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題名:	In situ growth of hollow gold-silver nanoshells within porous silica offers tunable plasmonic extinctions and enhanced colloidal stability
作者:	李岱洲;Li, Chien-Hung;Jamison, Andrew C;Rittikulsittichai, Supparesk;Lee, Tai-Chou;Lee, T. Randall
貢獻者:	工學院化學工程與材料工程學系
關鍵詞:	absorption;Colloids - chemistry;Drug Delivery Systems;energy-dispersive X-ray analysis;gold;Gold - chemistry;Humans;Metal Nanoparticles - chemistry;Microscopy, Electron, Scanning;Microscopy, Electron, Transmission;nanoparticles;Nanoshells - chemistry;Nanoshells - ultrastructure;optical properties;Particle Size;Porosity;scanning electron microscopy;silica;Silicon Dioxide - chemistry;Silver - chemistry;Surface Plasmon Resonance;transmission electron microscopy;X-ray photoelectron spectroscopy
日期:	2014-01-01
上傳時間:	2026-04-21 14:19:38 (UTC+8)
出版者:	American Chemical Society;United States: American Chemical Society
摘要:	摘要： Porous silica-coated hollow gold–silver nanoshells were successfully synthesized utilizing a procedure where the porous silica shell was produced prior to the transformation of the metallic core, providing enhanced control over the structure/composition of the bimetallic hollow core. By varying the reaction time and the precise amount of gold salt solution added to a porous silica-coated silver-core template solution, composite nanoparticles were tailored to reveal a readily tunable surface plasmon resonance that could be centered across the visible and near-IR spectral regions (∼445–800 nm). Characterization by X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and transmission electron microscopy revealed that the synthetic methodology afforded particles having uniform composition, size, and shape. The optical properties were evaluated by absorption/extinction spectroscopy. The stability of colloidal solutions of our composite nanoparticles as a function of pH was also investigated, revealing that the nanoshells remain intact over a wide range of conditions (i.e., pH 2–10). The facile tunability, enhanced stability, and relatively small diameter of these composite particles (∼110 nm) makes them promising candidates for use in tumor ablation or as photothermal drug-delivery agents. 其他題名： ACS Appl. Mater. Interfaces 出版者： United States: American Chemical Society 出版日期： 2014-11-26 出處： ACS Applied Materials & Interfaces, 2014-11, Vol.6 (22), p.19943-19950 資源來源： American Chemical Society Journals 識別號： ISSN: 1944-8244 識別號： ISSN: 1944-8252 識別號： EISSN: 1944-8252 識別號： DOI: 10.1021/am505424w 識別號： PMID: 25321928
顯示於類別:	[化學工程與材料工程學系 ] 期刊論文

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