Plasma Processing and ALD Modification of Multi-walled Carbon
Nanotubes for Ammonia Gas Sensing

k 2018

Plasma Processing and ALD Modification of Multi-walled Carbon Nanotubes for Ammonia Gas Sensing

KAUSHIK, Preeti, Marek ELIÁŠ, Dirk HEGEMANN, Jan MICHALICKA, Lenka ZAJÍČKOVÁ et. al.

Základní údaje

Originální název

Plasma Processing and ALD Modification of Multi-walled Carbon Nanotubes for Ammonia Gas Sensing

Autoři

KAUSHIK, Preeti, Marek ELIÁŠ, Dirk HEGEMANN, Jan MICHALICKA, Lenka ZAJÍČKOVÁ a Jan PRÁŠEK

Vydání

SVC TechCon 2018, 2018

Další údaje

Jazyk

angličtina

Typ výsledku

Prezentace na konferencích

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Organizační jednotka

Středoevropský technologický institut

ISBN

978-1-878068-28-6

Klíčová slova anglicky

carbon nanotubes, atomic layer deposition, ammonia, titanium dioxide

Změněno: 26. 3. 2019 15:59, Mgr. Pavla Foltynová, Ph.D.

Anotace

V originále

Carbon nanotube (CNTs)-metal oxide semiconductor (MOS) hybrid nanostructures can provide a new pathway for room temperature chemiresistive gas sensors due to combined properties of both the materials and the creation of heterojunctions between CNTs and MOS. Multi-walled carbon nanotubes (MWCNTs) were grown on Si substrates coated with SiO2 layer by catalytic chemical vapor deposition (CCVD) and coated by TiO2 films of different nominal thicknesses, 5, 10 and 20 nm, using atomic layer deposition (ALD). ALD is a self-limiting surface process providing highly uniform and conformal coatings if the surface reactive sites exist. CNT surface is quite inert and therefore, a modification of MWCNTs by carboxyl plasma polymer (PP) film prior to ALD of TiO2 was also applied. The thinnest TiO2 film formed island-like structure but the carboxyl PPs improved the film uniformity as observed by transmission electron microscopy. Raman spectroscopy revealed increased structural disorder of sp2 carbon when coated by TiO2 or carboxyl PP. The highest sensor response to NH3 was obtained for the thinnest TiO2 film and the sensors coated with carboxyl PP/TiO2 double layer showed higher response as compared to the pristine CNTs and those without the carboxyl PP film.

Návaznosti

LQ1601, projekt VaV

Název: CEITEC 2020 (Akronym: CEITEC2020)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, CEITEC 2020

Citovat

KAUSHIK, Preeti, Marek ELIÁŠ, Dirk HEGEMANN, Jan MICHALICKA, Lenka ZAJÍČKOVÁ a Jan PRÁŠEK. Plasma Processing and ALD Modification of Multi-walled Carbon Nanotubes for Ammonia Gas Sensing. In SVC TechCon 2018. 2018. ISBN 978-1-878068-28-6.

@proceedings{1427716,
   author = {Kaushik, Preeti and Eliáš, Marek and Hegemann, Dirk and Michalicka, Jan and Zajíčková, Lenka and Prášek, Jan},
   booktitle = {SVC TechCon 2018},
   keywords = {carbon nanotubes, atomic layer deposition, ammonia, titanium dioxide},
   language = {eng},
   isbn = {978-1-878068-28-6},
   title = {Plasma Processing and ALD Modification of Multi-walled Carbon Nanotubes for Ammonia Gas Sensing},
   year = {2018}
}

TY  - CONF
ID  - 1427716
AU  - Kaushik, Preeti - Eliáš, Marek - Hegemann, Dirk - Michalicka, Jan - Zajíčková, Lenka - Prášek, Jan
PY  - 2018
TI  - Plasma Processing and ALD Modification of Multi-walled Carbon Nanotubes for Ammonia Gas Sensing
SN  - 9781878068286
KW  - carbon nanotubes, atomic layer deposition, ammonia, titanium dioxide
N2  - Carbon nanotube (CNTs)-metal oxide semiconductor (MOS) hybrid nanostructures can provide a new pathway for room temperature chemiresistive gas sensors due to combined properties of both the materials and the creation of heterojunctions between CNTs and MOS. Multi-walled carbon nanotubes (MWCNTs) were grown on Si substrates coated with SiO2 layer by catalytic chemical vapor deposition (CCVD) and coated by TiO2 films of different nominal thicknesses, 5, 10 and 20 nm, using atomic layer deposition (ALD). ALD is a self-limiting surface process providing highly uniform and conformal coatings if the surface reactive sites exist. CNT surface is quite inert and therefore, a modification of MWCNTs by carboxyl plasma polymer (PP) film prior to ALD of TiO2 was also applied. The thinnest TiO2 film formed island-like structure but the carboxyl PPs improved the film uniformity as observed by transmission electron microscopy. Raman spectroscopy revealed increased structural disorder of sp2 carbon when coated by TiO2 or carboxyl PP. The highest sensor response to NH3 was obtained for the thinnest TiO2 film and the sensors coated with carboxyl PP/TiO2 double layer showed higher response as compared to the pristine CNTs and those without the carboxyl PP film.
ER  -

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