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Yotsarayuth Seekaew. 3D carbon based nanostructures for sensing applications. Doctoral Degraee(Physics). Kasetsart University. Office of the University Library. : Kasetsart University, 2019.
3D carbon based nanostructures for sensing applications
Name: Yotsarayuth Seekaew
Classification :.LCCS: TA418.9.N35
LCSH:
Nanostructures
LCSH:
Carbon nanotubes
LCSH:
Graphene
Abstract:
This thesis presents a room-temperature gas sensors based on carbon nanostructures fabricated by various methods. Characterizations by scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and Transmission electron microscopy confirmed the formation of carbon nanostructures. Several carbon-based nanostructures gas sensors including (I) 3D graphene-carbon nanotube (3D G-CNT) gas sensor, (II) bilayer graphene gas sensor and (III) a novel graphene-based electroluminescent (EL) gas sensor have been fabricated and worked well at room temperature. For 3D G-CNT gas sensor has been improved sensitivity and selectivity with decoration of titanium dioxide (TiO2) nanoparticles by sparking method. From gas-sensing results, the 3D TiO2/G-CNT gas sensor exhibited high toluene sensitivity and high toluene selectivity against various VOCs and environmental gases at room temperature.
The toluene-sensing mechanism has been proposed based on the formation of Schottky metal-semiconductor (MS) junctions. In case of bilayer graphene gas sensor, the nitrogen dioxide (NO2) detection performances of bilayer graphene gas sensor have been investigated in comparison with those of monolayer and multilayer graphene gas sensors at room temperature. From result, the bilayer graphene gas sensor exhibited high response and selectivity to NO2 at room temperature. The NO2-sensing mechanism of graphene sensing film has been explained based on the direct charge transfer process. For the graphene-based EL gas sensor, it was fabricated by screen-printing of a ZnS:Cu,Cl phosphor layer and drop-coating of graphene sensing layer. The results showed that the graphene-based EL gas sensor exhibited high response and high selectivity to CO2 at room temperature. Based on the sensing mechanism of graphene-based EL gas sensor has been explained based on the resistance change of graphene sensing layer via a direct charge transfer process.
Kasetsart University. Office of the University Library
Address:
Bangkok
Email:
tdckulib@ku.ac.th
Name: Chatchawal Wongchoosuk
Role:
Thesis Advisor
Created:
2019
Modified:
2025-06-27
Issued:
2025-06-27
วิทยานิพนธ์/Thesis
application/pdf
URL: https://www.lib.ku.ac.th/KUthesis/2562/yotsarayuth-see-all.pdf
CallNumber:
TA418.9.N35 .Y68
eng
DegreeName: Doctor of Philosophy
Level: Doctoral Degraee
Descipline: Physics
Grantor: Kasetsart University
©copyrights Kasetsart University
RightsAccess:
ใช้เวลา
0.027246 วินาที
Yotsarayuth Seekaew
| Title | Contributor | Type |
|---|---|---|
| Development of flexible gas sensors based on ink-jet printing method
มหาวิทยาลัยเกษตรศาสตร์ Yotsarayuth Seekaew | Chatchawat Wongchoosuk | วิทยานิพนธ์/Thesis |
| 3D carbon based nanostructures for sensing applications
มหาวิทยาลัยเกษตรศาสตร์ Yotsarayuth Seekaew | Chatchawal Wongchoosuk | วิทยานิพนธ์/Thesis |
Chatchawal Wongchoosuk