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CVD transfer-free graphene for sensing applications

The sp(2) carbon-based allotropes have been extensively exploited for the realization of gas sensors in the recent years because of their high conductivity and large specific surface area. A study on graphene that was synthetized by means of a novel transfer-free fabrication approach and is employed...

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Autores principales: Schiattarella, Chiara, Vollebregt, Sten, Polichetti, Tiziana, Alfano, Brigida, Massera, Ettore, Miglietta, Maria Lucia, Di Francia, Girolamo, Sarro, Pasqualina Maria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5433142/
https://www.ncbi.nlm.nih.gov/pubmed/28546895
http://dx.doi.org/10.3762/bjnano.8.102
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author Schiattarella, Chiara
Vollebregt, Sten
Polichetti, Tiziana
Alfano, Brigida
Massera, Ettore
Miglietta, Maria Lucia
Di Francia, Girolamo
Sarro, Pasqualina Maria
author_facet Schiattarella, Chiara
Vollebregt, Sten
Polichetti, Tiziana
Alfano, Brigida
Massera, Ettore
Miglietta, Maria Lucia
Di Francia, Girolamo
Sarro, Pasqualina Maria
author_sort Schiattarella, Chiara
collection PubMed
description The sp(2) carbon-based allotropes have been extensively exploited for the realization of gas sensors in the recent years because of their high conductivity and large specific surface area. A study on graphene that was synthetized by means of a novel transfer-free fabrication approach and is employed as sensing material is herein presented. Multilayer graphene was deposited by chemical vapour deposition (CVD) mediated by CMOS-compatible Mo. The utilized technique takes advantage of the absence of damage or contamination of the synthesized graphene, because there is no need for the transfer onto a substrate. Moreover, a proper pre-patterning of the Mo catalyst allows one to obtain graphene films with different shapes and dimensions. The sensing properties of the material have been investigated by exposing the devices to NO(2), NH(3) and CO, which have been selected because they are well-known hazardous substances. The concentration ranges have been chosen according to the conventional monitoring of these gases. The measurements have been carried out in humid N(2) environment, setting the flow rate at 500 sccm, the temperature at 25 °C and the relative humidity (RH) at 50%. An increase of the conductance response has been recorded upon exposure towards NO(2), whereas a decrease of the signal has been detected towards NH(3). The material appears totally insensitive towards CO. Finally, the sensing selectivity has been proven by evaluating and comparing the degree of adsorption and the interaction energies for NO(2) and NH(3) on graphene. The direct-growth approach for the synthesis of graphene opens a promising path towards diverse applicative scenarios, including the straightforward integration in electronic devices.
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spelling pubmed-54331422017-05-25 CVD transfer-free graphene for sensing applications Schiattarella, Chiara Vollebregt, Sten Polichetti, Tiziana Alfano, Brigida Massera, Ettore Miglietta, Maria Lucia Di Francia, Girolamo Sarro, Pasqualina Maria Beilstein J Nanotechnol Full Research Paper The sp(2) carbon-based allotropes have been extensively exploited for the realization of gas sensors in the recent years because of their high conductivity and large specific surface area. A study on graphene that was synthetized by means of a novel transfer-free fabrication approach and is employed as sensing material is herein presented. Multilayer graphene was deposited by chemical vapour deposition (CVD) mediated by CMOS-compatible Mo. The utilized technique takes advantage of the absence of damage or contamination of the synthesized graphene, because there is no need for the transfer onto a substrate. Moreover, a proper pre-patterning of the Mo catalyst allows one to obtain graphene films with different shapes and dimensions. The sensing properties of the material have been investigated by exposing the devices to NO(2), NH(3) and CO, which have been selected because they are well-known hazardous substances. The concentration ranges have been chosen according to the conventional monitoring of these gases. The measurements have been carried out in humid N(2) environment, setting the flow rate at 500 sccm, the temperature at 25 °C and the relative humidity (RH) at 50%. An increase of the conductance response has been recorded upon exposure towards NO(2), whereas a decrease of the signal has been detected towards NH(3). The material appears totally insensitive towards CO. Finally, the sensing selectivity has been proven by evaluating and comparing the degree of adsorption and the interaction energies for NO(2) and NH(3) on graphene. The direct-growth approach for the synthesis of graphene opens a promising path towards diverse applicative scenarios, including the straightforward integration in electronic devices. Beilstein-Institut 2017-05-08 /pmc/articles/PMC5433142/ /pubmed/28546895 http://dx.doi.org/10.3762/bjnano.8.102 Text en Copyright © 2017, Schiattarella et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Schiattarella, Chiara
Vollebregt, Sten
Polichetti, Tiziana
Alfano, Brigida
Massera, Ettore
Miglietta, Maria Lucia
Di Francia, Girolamo
Sarro, Pasqualina Maria
CVD transfer-free graphene for sensing applications
title CVD transfer-free graphene for sensing applications
title_full CVD transfer-free graphene for sensing applications
title_fullStr CVD transfer-free graphene for sensing applications
title_full_unstemmed CVD transfer-free graphene for sensing applications
title_short CVD transfer-free graphene for sensing applications
title_sort cvd transfer-free graphene for sensing applications
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5433142/
https://www.ncbi.nlm.nih.gov/pubmed/28546895
http://dx.doi.org/10.3762/bjnano.8.102
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