Zouaghi, Wissem ; Hussein, Laith ; Thomson, Mark D. ; Islam, Qamar-ul ; Nicoloso, Norbert ; Heinlein, Thorsten ; Engstler, Jörg ; Schneider, Jörg J. ; Roskos, Hartmut G. (2018)
Towards gas sensing with vertically aligned carbon nanotubes interrogated by THz radiation pulses.
In: Lithuanian Journal of Physics, 58 (1)
doi: 10.3952/physics.v58i1.3650
Article
Abstract
When vertically aligned carbon nanotubes (VACNT) are exposed to gases, their dielectric properties may change by mechanisms such as doping effects or a modification of the scattering channels of the mobile charge carriers of the VACNT. This report provides first data of a study which aims at an exploration of such conductivity changes in the THz frequency regime. The test gases are NH3 and SO2 which are known to act as donors, respectively as acceptors when interacting with the carbon nanotubes. Our measurements confirm the doping effects. This may open the way towards gas sensors based on the VACNT interrogated by THz radiation, where the VACNTs act as an accumulation volume for certain species contained in a gas stream.
| Item Type: | Article |
|---|---|
| Erschienen: | 2018 |
| Creators: | Zouaghi, Wissem ; Hussein, Laith ; Thomson, Mark D. ; Islam, Qamar-ul ; Nicoloso, Norbert ; Heinlein, Thorsten ; Engstler, Jörg ; Schneider, Jörg J. ; Roskos, Hartmut G. |
| Type of entry: | Bibliographie |
| Title: | Towards gas sensing with vertically aligned carbon nanotubes interrogated by THz radiation pulses |
| Language: | German |
| Date: | 2018 |
| Journal or Publication Title: | Lithuanian Journal of Physics |
| Volume of the journal: | 58 |
| Issue Number: | 1 |
| DOI: | 10.3952/physics.v58i1.3650 |
| URL / URN: | https://doi.org/10.3952/physics.v58i1.3650 |
| Abstract: | When vertically aligned carbon nanotubes (VACNT) are exposed to gases, their dielectric properties may change by mechanisms such as doping effects or a modification of the scattering channels of the mobile charge carriers of the VACNT. This report provides first data of a study which aims at an exploration of such conductivity changes in the THz frequency regime. The test gases are NH3 and SO2 which are known to act as donors, respectively as acceptors when interacting with the carbon nanotubes. Our measurements confirm the doping effects. This may open the way towards gas sensors based on the VACNT interrogated by THz radiation, where the VACNTs act as an accumulation volume for certain species contained in a gas stream. |
| Uncontrolled Keywords: | carbon nanotubes, terahertz spectroscopy, conductivity changes, gas sensing |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids |
| Date Deposited: | 07 Jun 2018 08:21 |
| Last Modified: | 07 Jun 2018 08:21 |
| PPN: | |
| Funders: | This work was funded by the Hessian Excellence Initiative LOEWE, Project “Sensors Towards THz”. |
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