pH-induced aggregation growth of large Au nanoparticles from zwitterionic ligand-modified small Au nanoparticles
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- 作者：Suling Yuan ; Xiaoping Heng ; Qi Zhang ; Jiawen Hu ; jwhu@hnu.edu.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Gold nanoparticle ; Zwitterionic ligand ; Oriented attachment growth ; Particle assembly ; Crystalline orientation
- 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
- 出版年：2016
- 出版时间：5 October 2016
- 年：2016
- 卷：506
- 期：Complete
- 页码：6-12
- 全文大小：2364 K
文摘
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Stability of 4 nm Au NPs can be largely improved upon modification with zwitterionic ligand.
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Under strong acidic conditions, hydrogen bond mediates the neighboring and self-assembly of small Au NPs.
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Driven by the decrease in surface free energy, the small particles grow into large Au particle via oriented attachment growth mechanism.