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.
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U2 - 10.1039/c3nr04118b
DO - 10.1039/c3nr04118b
M3 - Article
C2 - 24241354
AN - SCOPUS:84890133990
SN - 2040-3364
VL - 6
SP - 581
EP - 588
JO - Nanoscale
JF - Nanoscale
IS - 1
ER -