Au@Cu 2 O 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

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

Au@Cu 2 O 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 2 O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu 2 O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu 2 O shell formation. The response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs for NO 2 gas at low temperature. The improved performance of Au@Cu 2 O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.

Original languageEnglish
Pages (from-to)581-588
Number of pages8
JournalNanoscale
Volume6
Issue number1
DOIs
Publication statusPublished - 2014 Jan 7
Externally publishedYes

Fingerprint

Chemical sensors
Modulation
Nanoparticles
Surface plasmon resonance
Carbon Monoxide
Temperature
Screening
Thermodynamic stability
Gases
Transmission electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Au@Cu 2 O core-shell nanoparticles as chemiresistors for gas sensor applications : Effect of potential barrier modulation on the sensing performance. / Rai, Prabhakar; Khan, Rizwan; Raj, Sudarsan; Majhi, Sanjit Manohar; Park, Kyung Kuen; Yu, Yeon Tae; Lee, In-Hwan; Sekhar, Praveen Kumar.

In: Nanoscale, Vol. 6, No. 1, 07.01.2014, p. 581-588.

Research output: Contribution to journalArticle

Rai, Prabhakar ; Khan, Rizwan ; Raj, Sudarsan ; Majhi, Sanjit Manohar ; Park, Kyung Kuen ; Yu, Yeon Tae ; Lee, In-Hwan ; Sekhar, Praveen Kumar. / Au@Cu 2 O core-shell nanoparticles as chemiresistors for gas sensor applications : Effect of potential barrier modulation on the sensing performance. In: Nanoscale. 2014 ; Vol. 6, No. 1. pp. 581-588.
@article{9d8c5de26b8745cf87d2dbadf516df9b,
title = "Au@Cu 2 O core-shell nanoparticles as chemiresistors for gas sensor applications: Effect of potential barrier modulation on the sensing performance",
abstract = "Au@Cu 2 O 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 2 O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu 2 O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu 2 O shell formation. The response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs for NO 2 gas at low temperature. The improved performance of Au@Cu 2 O 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 In-Hwan Lee and Sekhar, {Praveen Kumar}",
year = "2014",
month = "1",
day = "7",
doi = "10.1039/c3nr04118b",
language = "English",
volume = "6",
pages = "581--588",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "1",

}

TY - JOUR

T1 - Au@Cu 2 O 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@Cu 2 O 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 2 O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu 2 O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu 2 O shell formation. The response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs for NO 2 gas at low temperature. The improved performance of Au@Cu 2 O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.

AB - Au@Cu 2 O 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 2 O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu 2 O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu 2 O shell formation. The response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu 2 O core-shell NPs was higher than that of bare Cu 2 O NPs for NO 2 gas at low temperature. The improved performance of Au@Cu 2 O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.

UR - http://www.scopus.com/inward/record.url?scp=84890133990&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84890133990&partnerID=8YFLogxK

U2 - 10.1039/c3nr04118b

DO - 10.1039/c3nr04118b

M3 - Article

C2 - 24241354

AN - SCOPUS:84890133990

VL - 6

SP - 581

EP - 588

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 1

ER -