文献类型：期刊文献

英文题名：Collective diffusion of charged nanoparticles in microchannel under electric field

作者：Wang, Zhichao[1,2];Yu, Hongping[1,2];Liyanage, Achini[3];Qiu, Junjie[1,2];Thushara, Dilantha[3];Bao, Bo[1,2];Zhao, Shuangliang[1,2,4,5]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Univ Moratuwa, Dept Chem & Proc Engn, Moratuwa 10400, Sri Lanka;[4]Guangxi Univ, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China;[5]Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

年份：2022

卷号：248

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20214711194325);WOS:【SCI-EXPANDED(收录号:WOS:000724348000009)】；

基金：This work is supported by National Natural Science Foundation of China (Nos.21808056, 91934302) and the Shanghai Interna-tional Science and Technology Collaboration Program (No.18160743700) .

语种：英文

外文关键词：Nanoparticles; Diffusion; Microchannel; Electric field

摘要：Controllable manipulation of the diffusion of nanoparticles through adopting external fields plays an important role in both separation and delivery of nanoparticles. This work demonstrates that external electric field can effectively enhance or suppress the collective diffusion of nanoparticles in microchannel. Collective diffusion coefficient of nanoparticles under positive or negative electric field was found to be 1.22 or 0.74 times that of the molecular collective diffusion coefficient without electric field applied, respectively. For the case of molecular collective diffusion, the collective diffusion coefficient is 5 times that of the self-diffusion coefficient. The deviation is attributed to the interparticle interactions among the multiple nanoparticles. Findings in this work can improve the understanding of readers for the col-lective diffusion of nanoparticles driven by concentration gradient under electric field. The phenomenon has great potential in the applications of separation and delivery of charged nanoparticles. (c) 2021 Elsevier Ltd. All rights reserved.