Effect of Au Nanorods on Potential Barrier Modulation in Morphologically Controlled Au@Cu2O Core–Shell Nanoreactors for Gas Sensor Applications

2014 ◽  
Vol 6 (10) ◽  
pp. 7491-7497 ◽  
Author(s):  
Sanjit Manohar Majhi ◽  
Prabhakar Rai ◽  
Sudarsan Raj ◽  
Bum-Soo Chon ◽  
Kyung-Kuen Park ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Potential Barrier ◽  
Core Shell ◽  
Au Nanorods ◽  
Sensor Applications

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

Nanoscale ◽  
2014 ◽  
Vol 6 (1) ◽  
pp. 581-588 ◽  
Author(s):  
Prabhakar Rai ◽  
Rizwan Khan ◽  
Sudarsan Raj ◽  
Sanjit Manohar Majhi ◽  
Kyung-Kuen Park ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Potential Barrier ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Sensor Applications ◽  
Core Shell Nanoparticles ◽  
Sensing Performance

Noble metal@metal oxide semiconductor core@shell nano-architectures as a new platform for gas sensor applications

RSC Advances ◽  
2015 ◽  
Vol 5 (93) ◽  
pp. 76229-76248 ◽  
Author(s):  
Prabhakar Rai ◽  
Sanjit Manohar Majhi ◽  
Yeon-Tae Yu ◽  
Jong-Heun Lee
Keyword(s):  
Gas Sensor ◽  
Noble Metal ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Research Progress ◽  
Core Shell ◽  
Feature Article ◽  
Sensor Applications ◽  
Metal Metal ◽  
Recent Research Progress

This feature article focuses on recent research progress in noble metal@metal oxides core@shell NPs for gas sensor applications.

Rapid synthesis and characterization of hybrid ZnO@Au core–shell nanorods for high performance, low temperature NO 2 gas sensor applications

2015 ◽  
Vol 355 ◽  
pp. 726-735 ◽  
Author(s):  
Dinesh Veeran Ponnuvelu ◽  
Biji Pullithadathil ◽  
Arun K. Prasad ◽  
Sandip Dhara ◽  
Anuradha Ashok ◽  
...  
Keyword(s):  
Low Temperature ◽  
Gas Sensor ◽  
High Performance ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Rapid Synthesis ◽  
Sensor Applications

scholarly journals A SERS Study of Charge Transfer Process in Au Nanorod–MBA@Cu2O Assemblies: Effect of Length to Diameter Ratio of Au Nanorods

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 867
Author(s):  
Lin Guo ◽  
Zhu Mao ◽  
Sila Jin ◽  
Lin Zhu ◽  
Junqi Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Shell Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Absorption Bands ◽  
Au Nanorods ◽  
The Core ◽  
Band Position ◽  
Surface Enhanced Raman ◽  
Core Shell Structure

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

Pulsed laser deposition of metal oxide nanostructures for highly sensitive gas sensor applications

2016 ◽  
Vol 236 ◽  
pp. 978-987 ◽  
Author(s):  
Joni Huotari ◽  
Ville Kekkonen ◽  
Tomi Haapalainen ◽  
Martin Leidinger ◽  
Tilman Sauerwald ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Pulsed Laser Deposition ◽  
Gas Sensor ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Sensor Applications ◽  
Oxide Nanostructures ◽  
Highly Sensitive ◽  
Metal Oxide Nanostructures

Star-Fruit-Shaped CuO Structures for High Performance Ethanol Gas Sensor Device

2021 ◽  
Vol 13 (4) ◽  
pp. 724-733
Author(s):  
Ahmad Umar ◽  
Ahmed A. Ibrahim ◽  
Rajesh Kumar ◽  
Hassan Algadi ◽  
Hasan Albargi ◽  
...  
Keyword(s):  
Gas Sensor ◽  
High Performance ◽  
Crystal Size ◽  
Gas Sensing ◽  
Sensor Applications ◽  
Sensor Device ◽  
Star Fruit ◽  
Micro Structures ◽  
Gas Response ◽  
Structural Crystal

In this paper, star-fruit-shaped CuO microstructures were hydrothermally synthesized and subsequently characterized through different techniques to understand morphological, compositional, structural, crystal, optical and vibrational properties. The formation of star-fruit-shaped structures along with some polygonal and spherical nanostructures was confirmed by FESEM analysis. XRD data and Raman spectrum confirmed the monoclinic tenorite crystalline phase of the CuO with crystal size 17.61 nm. Star-fruit-shaped CuO microstructures were examined for ethanol gas sensing behavior at various operating temperatures and concentrations. The gas response of 135% was observed at the optimal temperature of 225 °C. Due to excellent selectivity, stability and re-usability, the as-fabricated sensor based on star-fruit-shaped CuO micro-structures may be explored for future toxic gas sensor applications.

Metal-oxide nanostructures produced by PLD in open air for gas sensor applications

2019 ◽  
Vol 470 ◽  
pp. 861-869 ◽  
Author(s):  
G. Atanasova ◽  
A. Og. Dikovska ◽  
T. Dilova ◽  
B. Georgieva ◽  
G.V. Avdeev ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Sensor Applications ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures
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