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Journal article
Brownian Diffusion of Individual Janus Nanoparticles at Water/Oil Interfaces
ACS nano, v 14(8), pp 10095-10103
25 Aug 2020
PMID: 32662990
Abstract
Janus nanoparticles could exhibit a higher interfacial activity and adsorb stronger to fluid interfaces than homogeneous nanoparticles of similar sizes. However, little is known about the interfacial diffusion of Janus nanoparticles and how it compares to that of homogeneous ones. Here, we employed fluorescence correlation spectroscopy to study the lateral diffusion of ligand-grafted Janus nanoparticles adsorbed at water/oil interfaces. We found that the diffusion was significantly slower than that of homogeneous nanoparticles. We carried out dissipative particle dynamic simulations to study the mechanism of interfacial slowdown. Good agreement between experimental and simulation results has been obtained only provided that the flexibility of ligands grafted on the nanoparticle surface was taken into account. The polymeric ligands were deformed and oriented at an interface so that the effective radius of Janus nanoparticles is larger than the nominal one obtained by measuring the diffusion in bulk solution. These findings highlight further the critical importance of the ligands grafted on Janus nanoparticles for applications involving nanoparticle adsorption at an interface, such as oil recovery or two-dimensional self-assembly.
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Details
- Title
- Brownian Diffusion of Individual Janus Nanoparticles at Water/Oil Interfaces
- Creators
- Dapeng Wang - Max Planck Institute for Polymer ResearchYou-Liang Zhu - State Key Laboratory of Polymer Physics and ChemistryYuehua Zhao - State Key Laboratory of Polymer Physics and ChemistryChristopher Y. Li - Drexel UniversityAshis Mukhopadhyay - Wayne State UniversityZhao-Yan Sun - State Key Laboratory of Polymer Physics and ChemistryKaloian Koynov - Max Planck Institute for Polymer ResearchHans-Juergen Butt - Max Planck Inst Polymer Res, D-55128 Mainz, Germany
- Publication Details
- ACS nano, v 14(8), pp 10095-10103
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 9
- Grant note
- YJKYYQ20190084 / Scientific Instrument Developing Project of the Chinese Academy of Sciences ZDBS-LY-SLH033; QYZDY-SSW-SLH027 / Key Research Program of Frontier Sciences, Chinese Academy of Sciences 20180414007GH / International Science and Technology Cooperation Program of Jilin, China 21873094; 21833008; 21790344 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000566341000071
- Scopus ID
- 2-s2.0-85090076774
- Other Identifier
- 991019196779404721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology