Depletion-induced size fractionation of nanorod dispersions

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题名:	Depletion-induced size fractionation of nanorod dispersions
作者:	曹恆光;Hu, Ssu-Wei;Sheng, Yu-Jane;Tsao, Heng-Kwong
贡献者:	工學院化學工程與材料工程學系
日期:	2013-08-14
上传时间:	2026-04-21 14:13:26 (UTC+8)
出版者:	Royal Society of Chemistry
摘要:	摘要： Depletion can induce aggregation of nanoparticles and therefore has been employed for size fractionation of nanoparticle dispersions. In this study, depletion-induced separation of solvophilic nanorods in polymer solution is explored via dissipative particle dynamics. Three possible equilibrium states are observed upon polymer addition: dispersion, pre-transition (formation of clusters), and phase separation. By varying the concentration ( R ) and length ( L ) of nanorods or changing the system temperature ( T ), two morphological phase diagrams including R - L and R - T are obtained at a given polymer concentration. For a binary nanorod mixture in the pre-transition state, the cluster can be homogeneous or mixed and the latter hinders the size fractionation. According to the R - L phase diagram, two criteria associated with the formation of homogeneous clusters are given. Based on the criteria, two methods, dilution and temperature increment, for the improvement of fractionation resolution are proposed. This methodology can be generally applied to fractionate nanoparticle dispersions of any kind. Dilution and temperature increment can be employed to facilitate the fractionation resolution of a mixture of nanorods with different lengths. 出版日期： 2013-07-11 識別號： ISSN: 1744-683X 識別號： EISSN: 1744-6848 識別號： DOI: 10.1039/c3sm50825k
显示于类别:	[化學工程與材料工程學系 ] 期刊論文

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