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Self-assembly based plasmonic nanoparticle arrays coupling with hexagonal boron nitride nanosheets

Abstract

Investigation of hexagonal boron nitride nanosheet (BNNS) / plasmonic nanoparticle (NP) composites is of crucial importance for developing plasmaron-based nanodevices where BNNS is a potential candidate. Here a simple and effective way depicting the fabrication of BNNS/Au NPs nanocomposites is reported. Diblock copolymer-based NP arrays exhibiting a high degree of hexagonal order and offering easy control of particle size are utilized to produce Au NP arrays directly bonding to BNNSs in large scale, allowing to articulate the underlying physics of the metal/BNNS interface. The coupling between BNNSs and plasmonic Au NP arrays, work function, charge transfer and surface-enhanced Raman scattering (SERS) of BNNS phonon modes are explored. It is revealed that local surface plasmon resonance (LSPR) of Au NPs induced electromagnetic mechanism responsible for the enhanced Raman results of BNNS when placing it under the bottom of Au NPs. In contrast, essential contribution of chemical enhancement from the charge transfer induced by energy realignment at the metal/BNNS interface is manifested in hybrids system of Au NPs and encapsulated BNNS. This work is the first demonstration of the evolving plasmon resonance and charge-based interactions dependent upon the metal/BNNS interface, therefore providing straightforward implications to further develop BNNS-based plasmonics, optoelectronics, and electronics.

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Publication details

The article was received on 25 May 2017, accepted on 07 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR03723F
Citation: Nanoscale, 2017, Accepted Manuscript
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    Self-assembly based plasmonic nanoparticle arrays coupling with hexagonal boron nitride nanosheets

    W. Gao, Y. Zhao, H. Yin and H. Li, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03723F

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