Journal
LANGMUIR
Volume 27, Issue 7, Pages 3249-3253Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la105145j
Keywords
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Funding
- NSFC [50773091, 50973126, 60907019, 51003113, 61077028]
- MOST [2010CB934103, 2008DFA02050, S2010GR0980]
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Gold nanoparticles (AuNP's) prepared through a controllable synthesis and aggregation process are attractive for their unique properties that arise from their surface plasmon resonances (SPRs). However, aggregation-controlled AuNP's on amorphous surfaces have not been well explored. In this study, we present a simple in situ synthesis method for preparing AuNP's in which the AuNP's self-aggregate into microscale Candock-leaf-like structures on a polyelectrolyte film (PEF) surface. In this approach, the PEF plays an important role in adsorbing and storing AuCl4- as well as in controlling the release speed of AuCl4- in the preparation process. The mechanism for forming these Candock-leaf-like structures has been illustrated by both the growth process of gold nanoparticles and the Ostwald ripenning of the aggregations. AuNP's with a unique structure exhibited significantly enhanced surface Raman scattering and strong superhydrophobicity.
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