Ligand-Dependent Coalescence Behaviors of Gold Nanoparticles Studied by Multichamber Graphene Liquid Cell Transmission Electron Microscopy

• DOI: 10.1021/acs.nanolett.0c03517
• Publication Date: 2020-11-13T18:41:08Z
• Authors: Yuna Bae; Kitaek Lim; Seulwoo Kim; Dohun Kang; Byung Hyo Kim; Joodeok Kim; Sungsu Kang; Sungho Jeon; JunBeom Cho; Won Bo Lee; Won Chul Lee; Jungwon Park
• Keywords: Coalescence (physics)

The formation mechanism of colloidal nanoparticles is complex because significant nonclassical pathways coexist with the conventional nucleation and growth processes. Particularly, coalescence growing clusters determines final morphology crystallinity synthesized nanoparticles. However, experimental investigation a challenge process highly kinetic correlates surface ligands that dynamically modify energy interparticle interactions Here, we employ quantitative in situ TEM multichamber graphene liquid cell to observe processes occurring synthesis gold different ligand systems, thus affording us an insight into their ligand-dependent kinetics. analyses numerous liquid-phase trajectories MD simulations shells demonstrate enhanced mobility, employing heterogeneous mixture, results rapid nanoparticle pairing approach fast post-merging structural relaxation.