Ligand-Dependent Coalescence Behaviors of Gold Nanoparticles Studied by Multichamber Graphene Liquid Cell Transmission Electron Microscopy
- Authors
- Bae, Yuna; Lim, Kitaek; Kim, Seulwoo; Kang, Dohun; Kim, Byung Hyo; Kim, Joodeok; Kang, Sungsu; Jeon, Sungho; Cho, JunBeom; Lee, Won Bo; Lee, Won Chul; Park, Jungwon
- Issue Date
- Dec-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- quantitative liquid-phase TEM; in situ TEM; coalescence; ligand-dependency; nanoparticles
- Citation
- NANO LETTERS, v.20, no.12, pp.8704 - 8710
- Journal Title
- NANO LETTERS
- Volume
- 20
- Number
- 12
- Start Page
- 8704
- End Page
- 8710
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/40407
- DOI
- 10.1021/acs.nanolett.0c03517
- ISSN
- 1530-6984
- Abstract
- The formation mechanism of colloidal nanoparticles is complex because significant nonclassical pathways coexist with the conventional nucleation and growth processes. Particularly, the coalescence of the growing clusters determines the final morphology and crystallinity of the synthesized nanoparticles. However, the experimental investigation of the coalescence mechanism is a challenge because the process is highly kinetic and correlates with surface ligands that dynamically modify the surface energy and the interparticle interactions of nanoparticles. Here, we employ quantitative in situ TEM with multichamber graphene liquid cell to observe the coalescence processes occurring in the synthesis of gold nanoparticles in different ligand systems, thus affording us an insight into their ligand-dependent coalescence kinetics. The analyses of numerous liquid-phase TEM trajectories of the coalescence and MD simulations of the ligand shells demonstrate that enhanced ligand mobility, employing a heterogeneous ligand mixture, results in the rapid nanoparticle pairing approach and a fast post-merging structural relaxation.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.