Enhanced ultraviolet emission from poly(vinyl alcohol) ZnO nanoparticles using a SiO2-Au core/shell structure

Dali Shao; Hongtao Sun; Mingpeng Yu; Jie Lian; Shayla Sawyer

doi:10.1021/nl3031955

Enhanced ultraviolet emission from poly(vinyl alcohol) ZnO nanoparticles using a SiO₂-Au core/shell structure

Dali Shao, Hongtao Sun, Mingpeng Yu, Jie Lian, Shayla Sawyer

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Enhanced near band gap edge (NBE) emissions of PVA-ZnO nanoparticles were achieved by employing SiO₂-Au core/shell nanostructures whereas the defect-level emission (DLE) is greatly suppressed. A maximum enhancement of nearly 400% was observed using SiO₂-Au for the emission with optical resonance at 554 nm. SiO₂-Au core/shell nanostructures also show a superior tunability of resonance energy as compared to that of the pure metal nanoparticles. The enhancement of the NBE emission and suppressed DLE is ascribed to the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of ZnO nanoparticles.

Original language	English (US)
Pages (from-to)	5840-5844
Number of pages	5
Journal	Nano Letters
Volume	12
Issue number	11
DOIs	https://doi.org/10.1021/nl3031955
State	Published - Nov 14 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

Keywords

SiO-Au core/shell
ZnO nanoparticles
photoluminescence
surface plasmon resonance

Access to Document

10.1021/nl3031955

Cite this

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title = "Enhanced ultraviolet emission from poly(vinyl alcohol) ZnO nanoparticles using a SiO2-Au core/shell structure",

abstract = "Enhanced near band gap edge (NBE) emissions of PVA-ZnO nanoparticles were achieved by employing SiO2-Au core/shell nanostructures whereas the defect-level emission (DLE) is greatly suppressed. A maximum enhancement of nearly 400% was observed using SiO2-Au for the emission with optical resonance at 554 nm. SiO2-Au core/shell nanostructures also show a superior tunability of resonance energy as compared to that of the pure metal nanoparticles. The enhancement of the NBE emission and suppressed DLE is ascribed to the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of ZnO nanoparticles.",

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T1 - Enhanced ultraviolet emission from poly(vinyl alcohol) ZnO nanoparticles using a SiO2-Au core/shell structure

AU - Shao, Dali

AU - Sun, Hongtao

AU - Yu, Mingpeng

AU - Lian, Jie

AU - Sawyer, Shayla

PY - 2012/11/14

Y1 - 2012/11/14

N2 - Enhanced near band gap edge (NBE) emissions of PVA-ZnO nanoparticles were achieved by employing SiO2-Au core/shell nanostructures whereas the defect-level emission (DLE) is greatly suppressed. A maximum enhancement of nearly 400% was observed using SiO2-Au for the emission with optical resonance at 554 nm. SiO2-Au core/shell nanostructures also show a superior tunability of resonance energy as compared to that of the pure metal nanoparticles. The enhancement of the NBE emission and suppressed DLE is ascribed to the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of ZnO nanoparticles.

AB - Enhanced near band gap edge (NBE) emissions of PVA-ZnO nanoparticles were achieved by employing SiO2-Au core/shell nanostructures whereas the defect-level emission (DLE) is greatly suppressed. A maximum enhancement of nearly 400% was observed using SiO2-Au for the emission with optical resonance at 554 nm. SiO2-Au core/shell nanostructures also show a superior tunability of resonance energy as compared to that of the pure metal nanoparticles. The enhancement of the NBE emission and suppressed DLE is ascribed to the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of ZnO nanoparticles.

KW - SiO-Au core/shell

KW - ZnO nanoparticles

KW - photoluminescence

KW - surface plasmon resonance

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