標題: Rapid separation of gold nanorods in multilayer aqueous systems via centrifugation
作者: Yao, I-Chun
Chang, Chun-Wei
Ko, Hao-Wen
Li, Heng
Lu, Tien-Chang
Chen, Jiun-Tai
應用化學系
光電工程學系
Department of Applied Chemistry
Department of Photonics
公開日期: 1-Jan-2016
摘要: In this work, we demonstrate multilayer aqueous systems as media to separate gold nanoparticles of different shapes and sizes. The multilayer aqueous systems are composed of CTAB/EG solutions with different viscosities. By centrifugation, gold nanoparticles with different shapes and sizes can be dispersed in different layers of the aqueous systems. Gold nanorods synthesized by different conditions, such as changing the amount of AgNO3 or different aging times, are used to examine the multilayer aqueous systems. Gold nanorods with higher aspect ratios can be obtained by increasing the concentration of AgNO3, as confirmed by UV-Vis spectra and TEM studies. The separated gold nanorods are also characterized by surface-enhanced Raman scattering (SERS), showing lower activity for gold nanorods with higher aspect ratios, due to the size-dependent absorption of the longitudinal plasmon band. The multilayer aqueous systems can effectively separate gold nanorods prepared by different conditions and can be applied to separate other types of nanoparticles.
URI: http://dx.doi.org/10.1039/c6ra21404e
http://hdl.handle.net/11536/132703
ISSN: 2046-2069
DOI: 10.1039/c6ra21404e
期刊: RSC ADVANCES
Volume: 6
Issue: 93
起始頁: 90786
結束頁: 90791
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