Separation of gold nanorods by viscosity gradient centrifugation

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• 作者：Suli Dong ; Yawei Wang ; Yang Tu ; Aiye Liang ; Xiaogang Li…
• 关键词：Nanoparticles ; Sedimentation ; Size dispersion ; Poly(2 ; ethyl ; 2 ; oxazoline) ; Nanomaterial ; Transmission electron microscopy
• 刊名：Microchimica Acta
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：183
• 期：3
• 页码：1269-1273
• 全文大小：565 KB
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• 作者单位：Suli Dong (1)
  Yawei Wang (1)
  Yang Tu (2)
  Aiye Liang (3)
  Xiaogang Li (1)
  Qingquan Zhang (1)
  Xiaojun Liu (1)
  
  1. Jiangsu Key Laboratory of Green Synthesis for Functional Materials, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, China
  2. Environmental Protection Bureau of Hongze County, Huaian, 223100, China
  3. Department of Physical Sciences, Charleston Southern University, 9200 University Boulevard,, North Charleston, SC, 29406, USA
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Inorganic Chemistry
  Physical Chemistry
  Characterization and Evaluation Materials
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Wien
• ISSN：1436-5073

文摘

Size-uniform gold nanorods (Au-NRs) are used in biosensing, bioimaging, photothermal therapy, drug and gene delivery, and controlled release. Monodisperse Au-NRs are usually obtained by separation steps following their synthesis, and centrifugation is widely used because of the ease of operation, high recovery, and the good availability of equipment. So far, the effect of viscosity on the separation of Au-NRs has not been investigated. We have developed a method for separation of monodisperse Au-NRs that is based on centrifugation in a viscosity gradient. Monodisperse Au-NRs obtained from gold nanoparticles were obtained by centrifugation in viscosity gradient adjusted with poly(2-ethyl-2-oxazoline). Au-NRs in sizes ranging from 25.6 to 26.1 nm in effective radius can be separated 5500 g within 5 min, which appears to be the fastest method for separation of Au-NRs.