Shape Recognition of Nanoparticle-Imprinting Materials Enhanced by Depletants

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题名:	Shape Recognition of Nanoparticle-Imprinting Materials Enhanced by Depletants
作者:	曹恆光;Chen, Yen-Fu;Tsai, Hsin-Ju;Sheng, Yu-Jane;Tsao, Heng-Kwong
贡献者:	工學院化學工程與材料工程學系
关键词:	energy;molecular dynamics;nanoparticles;synergism
日期:	2016-09-08
上传时间:	2026-04-21 14:55:11 (UTC+8)
出版者:	American Chemical Society
摘要:	摘要： The recognition of nanoparticles by imprinted materials via entropic depletion attraction is investigated by dissipative particle dynamics simulations. It is found that the depletion attraction exits between nanoparticles and imprinted materials with complementary shapes based on the interaction energy U(H) and association energy E a. The strength of the attractive depletion grows with increasing size of a perfectly matched target/cavity (TC) pair owing to the increment in their overlapping excluded volumes. The uptake of targets can be significantly enhanced by increasing the concentration of depletant ϕD. The selective recognition between perfectly matched and mismatched TC pairs is also studied, and a very high selectivity can be achieved at an optimal ϕD. The kinetics of the recognition process reveals that small nanoparticles migrate fast and access the cavity easily but move out of the cavities eventually due to their weak association energy. Finally, the synergetic effect of entropic depletion and enthalpic affinity is proved to enhance the association fraction substantially for small perfectly matched TC pairs with weak affinity. Our simulation results demonstrate the importance of the depletion effect on the nanoparticle-imprinting technology. 其他題名： J. Phys. Chem. C 出版者： American Chemical Society 出版日期： 2016-09-08 出處： Journal of physical chemistry. C, 2016-09, Vol.120 (35), p.19871-19877 資源來源： American Chemical Society Journals 版權： Copyright © 2016 American Chemical Society 識別號： ISSN: 1932-7447 識別號： ISSN: 1932-7455 識別號： EISSN: 1932-7455 識別號： DOI: 10.1021/acs.jpcc.6b07260
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