Au@Cu2O core-shell nanoparticles as chemiresistors for gas sensor applications: Effect of potential barrier modulation on the sensing performance

Prabhakar Rai; Rizwan Khan; Sudarsan Raj; Sanjit Manohar Majhi; Kyung Kuen Park; Yeon Tae Yu; In Hwan Lee; Praveen Kumar Sekhar

doi:10.1039/c3nr04118b

Au@Cu₂O core-shell nanoparticles as chemiresistors for gas sensor applications: Effect of potential barrier modulation on the sensing performance

Prabhakar Rai
, Rizwan Khan
, Sudarsan Raj
, Sanjit Manohar Majhi
, Kyung Kuen Park
, Yeon Tae Yu^*
, In Hwan Lee
, Praveen Kumar Sekhar

^*Corresponding author for this work

Information Materials Engineering

Jeonbuk National University
Washington State University Vancouver

Research output: Contribution to journal › Journal article › peer-review

167 Scopus citations

Abstract

Au@Cu₂O core-shell nanoparticles (NPs) were synthesized by a solution method at room temperature and applied for gas sensor applications. Transmission electron microscopy (TEM) images showed the formation of Au@Cu ₂O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu₂O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu₂O shell formation. The response of Au@Cu₂O core-shell NPs was higher than that of bare Cu₂O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu₂O core-shell NPs was higher than that of bare Cu₂O NPs for NO₂ gas at low temperature. The improved performance of Au@Cu₂O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.

Original language	English
Pages (from-to)	581-588
Number of pages	8
Journal	Nanoscale
Volume	6
Issue number	1
DOIs	https://doi.org/10.1039/c3nr04118b
State	Published - 2014.01.7

Quacquarelli Symonds(QS) Subject Topics

Materials Science

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10.1039/c3nr04118b

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title = "Au@Cu2O core-shell nanoparticles as chemiresistors for gas sensor applications: Effect of potential barrier modulation on the sensing performance",

abstract = "Au@Cu2O core-shell nanoparticles (NPs) were synthesized by a solution method at room temperature and applied for gas sensor applications. Transmission electron microscopy (TEM) images showed the formation of Au@Cu 2O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu2O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu2O shell formation. The response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs for NO2 gas at low temperature. The improved performance of Au@Cu2O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.",

author = "Prabhakar Rai and Rizwan Khan and Sudarsan Raj and Majhi, \{Sanjit Manohar\} and Park, \{Kyung Kuen\} and Yu, \{Yeon Tae\} and Lee, \{In Hwan\} and Sekhar, \{Praveen Kumar\}",

year = "2014",

month = jan,

day = "7",

doi = "10.1039/c3nr04118b",

language = "English",

volume = "6",

pages = "581--588",

journal = "Nanoscale",

issn = "2040-3364",

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TY - JOUR

T1 - Au@Cu2O core-shell nanoparticles as chemiresistors for gas sensor applications

T2 - Effect of potential barrier modulation on the sensing performance

AU - Rai, Prabhakar

AU - Khan, Rizwan

AU - Raj, Sudarsan

AU - Majhi, Sanjit Manohar

AU - Park, Kyung Kuen

AU - Yu, Yeon Tae

AU - Lee, In Hwan

AU - Sekhar, Praveen Kumar

PY - 2014/1/7

Y1 - 2014/1/7

N2 - Au@Cu2O core-shell nanoparticles (NPs) were synthesized by a solution method at room temperature and applied for gas sensor applications. Transmission electron microscopy (TEM) images showed the formation of Au@Cu 2O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu2O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu2O shell formation. The response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs for NO2 gas at low temperature. The improved performance of Au@Cu2O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.

AB - Au@Cu2O core-shell nanoparticles (NPs) were synthesized by a solution method at room temperature and applied for gas sensor applications. Transmission electron microscopy (TEM) images showed the formation of Au@Cu 2O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu2O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu2O shell formation. The response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs for NO2 gas at low temperature. The improved performance of Au@Cu2O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.

UR - https://www.scopus.com/pages/publications/84890133990

U2 - 10.1039/c3nr04118b

DO - 10.1039/c3nr04118b

M3 - Journal article

C2 - 24241354

AN - SCOPUS:84890133990

SN - 2040-3364

VL - 6

SP - 581

EP - 588

JO - Nanoscale

JF - Nanoscale

IS - 1

ER -

Au@Cu₂O core-shell nanoparticles as chemiresistors for gas sensor applications: Effect of potential barrier modulation on the sensing performance

Abstract

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