Plasma deposited carbon nanowalls for detection of organic vapours

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F16%3A43875167" target="_blank" >RIV/70883521:28610/16:43875167 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Plasma deposited carbon nanowalls for detection of organic vapours

Original language description

One of the grand challenges in material science is to develop the efficient and low-cost sensors for quick detection of various toxic and carcinogenic molecules, which require rather lengthy procedures or costly techniques for detection. These challenges can be tasked with carbon nanowall-based sensors, where the thin film maze-like structures are deposited on silicon substrates with plasma-enhanced chemical vapour depositions. These sensors demonstrate the high sensitivity in response, selectivity and reversibility for the vapour detection of volatile organic compounds, when tested by an electrical resistance method during adsorption and desorption cycles. The maze-like structures of carbon are composed of several layers of vertically aligned sheets - mostly graphene [1,2]. The structures are deposited from two different plasma gas mixtures generated either in CH4 or C2F6 with H2 [3]. Herein the neutral H atoms are generated in surface wave plasma region driven by a 2.45 GHz microwave power supply and then mixed with CH4/C2F6 and deposited in capacitively coupled plasma region operating at 100 MHz. By variating plasma processing parameters, we are able to achieve even different wall-to-wall distances ranging from 50 nm and 300 nm when prepared on silicon wafer substrate [4]. Further these structures are subjected to different organic vapours of: DMA; urea; iso-pentane; diethyl ether; acetone; methanol; different hydrocarbons; etc. in order to evaluate the relationship between the change in resistance, molecular weight of the adsorbent, the polarity and the bonding/interaction type [4]. For assessment and unravelling the detection mechanisms different surface analyses methods (XPS, Raman, FTIR, SIMS, UV-Vis) are applied prior, between and at the end of molecule detection. The properties of carbon nanowalls are then linked, and will be discussed in respect to the properties of detected molecules.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JB - Sensors, detecting elements, measurement and regulation

OECD FORD branch

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Project

<a href="/en/project/LO1504" target="_blank" >LO1504: Centre of Polymer Systems Plus</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

International workshop on the application of nanomaterials, 15.-16. 11 2016 Zlín

ISBN

978-80-7454-622-8

ISSN

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e-ISSN

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Number of pages

1

Pages from-to

1

Publisher name

Tomas Bata University

Place of publication

Zlin

Event location

Zlín

Event date

Nov 15, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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