Separation of biosynthesized gold nanoparticles by density gradient centrifugation
Separation of biosynthesized gold nanoparticles by density gradient centrifugation
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DOI：
10.1080/01496395.2016.1273951
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发表时间：
2017-01
影响因子：
2.8
通讯作者：
Yanmei Zheng;Guangjing Feng;T. Shang;Weiwei Wu;Jiale Huang;Daohua Sun;Yuanpeng Wang;Qingbiao Li
中科院分区：
文献类型：
--
作者：
Yanmei Zheng;Guangjing Feng;T. Shang;Weiwei Wu;Jiale Huang;Daohua Sun;Yuanpeng Wang;Qingbiao Li
贵金属纳米颗粒（NPs）的电子、光学、磁性和催化性能强烈依赖于它们的尺寸。贵金属纳米粒子的尺寸控制是纳米技术领域的重要问题之一。我们从理论上和实验上证明了金纳米粒子可以通过密度梯度离心（DGC）根据它们的大小进行分离。通过对卧式转子离心机的力平衡分析，建立了沉降位移与离心时间的关系模型，可用于预测特定时间内颗粒位移对分离效果的影响。考察了离心时间和离心力对DGC分离效果的影响。
ABSTRACT The electronic, optical, magnetic, and catalytic properties of noble metal nanoparticles (NPs) strongly depend on their size. The size control of the noble metal NPs is one of the significant issues in the field of nanotechnology. We demonstrate both theoretically and experimentally that gold NPs can be separated by density gradient centrifugation (DGC) according to their size. By analyzing the force balance in a centrifuge with a horizontal rotor, a model was developed that relates the sedimentation shift to the centrifugation time and can be used to predict the effect of separation by the shift of particles within a specific period of time. The influences of centrifugation time and centrifugal force on the separation effect of DGC were evaluated.