Reverse Self-Assembly: (111)-Oriented Gold Crystallization at Alkylthiol Monolayer Templates
Journal Article
·
· Physical Review Letters
It has long been known that thiol-terminated molecules self-assemble as commensurate monolayers on Au(111) surfaces. By spreading floating octadecanethiol monolayers on aqueous solutions of chloroauric acid (HAuCl4) and using x rays to reduce the gold ions as well as to probe the structure, we have observed the nucleation of (111)-oriented Au nanoparticles at thiol surfaces. This process may be similar to the formation of biogenic gold by bacteria. The thiol monolayer acts as a 'soft template,' changing its structure as Au crystals form so that there is a {radical}3 x {radical}3 commensurate relationship.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1041686
- Report Number(s):
- BNL--97364-2012-JA
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 107; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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