JVSTA Humayun et al 20170823.pdf (16.84 MB)
0/0

Effects of O2 plasma and UV-O3 assisted surface activation on high sensitivity metal oxide functionalized multiwalled carbon nanotube CH4 sensors

Download (16.84 MB)
journal contribution
posted on 27.06.2018 by MT Humayun, M Sainato, R Divan, RA Rosenberg, A Sahagun, L Gundel, PA Solomon
The authors present a comparative analysis of ultraviolet-O3 (UVO) and O2 plasma-based surface activation processes of multiwalled carbon nanotubes (MWCNTs), enabling highly effective functionalization with metal oxide nanocrystals (MONCs). Experimental results from transmission electron microscopy, scanning electron microscopy, x-ray photoelectron spectroscopy, and Raman spectroscopy show that by forming COOH (carboxyl), C-OH (hydroxyl), and C=O (carbonyl) groups on the MWCNT surface that act as active nucleation sites, O2 plasma and UVO-based dry pretreatment techniques greatly enhance the affinity between the MWCNT surface and the functionalizing MONCs. MONCs, such as ZnO and SnO2, deposited by the atomic layer deposition technique, were implemented as the functionalizing material following UVO and O2 plasma activation of MWCNTs. A comparative study on the relative resistance changes of O2 plasma and UVO activated MWCNT functionalized with MONC in the presence of 10 ppm methane (CH4) in air is presented as well. © 2017 American Vacuum Society.

Categories

Keyword(s)

History

Publisher Statement

Copyright @ AIP Publishing

Publisher

AIP Publishing

Language

en_US

issn

0734-2101

Issue date

01/11/2017

Exports

Categories

Keyword(s)

Exports