Au@Cu2O core-shell nanoparticles as chemiresistors for gas sensor applications: effect of potential barrier modulation on the sensing performance
Rai, P; Khan, R; Raj, S; Majhi, SM; Park, KK; Yu, YT; Lee, IH; Sekhar, PK
HERO ID
2232615
Reference Type
Journal Article
Year
2014
Language
English
PMID
| HERO ID | 2232615 |
|---|---|
| In Press | No |
| Year | 2014 |
| Title | Au@Cu2O core-shell nanoparticles as chemiresistors for gas sensor applications: effect of potential barrier modulation on the sensing performance |
| Authors | Rai, P; Khan, R; Raj, S; Majhi, SM; Park, KK; Yu, YT; Lee, IH; Sekhar, PK |
| Journal | Nanoscale |
| Volume | 6 |
| Issue | 1 |
| Page Numbers | 581-588 |
| 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@Cu2O 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. |
| Doi | 10.1039/c3nr04118b |
| Pmid | 24241354 |
| Wosid | WOS:000328673000069 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |