2016
DOI: 10.1088/2053-1583/3/1/011007
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Enhancing gas sensing properties of graphene by using a nanoporous substrate

Abstract: Substrate engineering is shown to be a viable approach for improving the use of graphene thin films for gas sensor applications. The performance of two-terminal devices fabricated on smooth SiO 2 and nanoporous anodized aluminum oxide (AAO) substrates are compared. Raman studies indicated that both types of samples exhibit similarly low point-defect densities, but the mobility values of the SiO 2supported films were found to be three times larger than those on porous AAO substrates. However, the AAO-supported … Show more

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Cited by 19 publications
(17 citation statements)
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“…Analyzed mode shapes points out that if the mass of attached nanoparticle and the nonlocal parameter is low the resonant frequency is around 8 -30 GHz depending on the mode shape. As the mass of the attached nanoparticle and the nonlocal parameter gets larger the resonant frequency drops down to a MHz range which is closer to experimentally obtained results [19,50,51].…”
Section: Mathematical Problems In Engineeringsupporting
confidence: 89%
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“…Analyzed mode shapes points out that if the mass of attached nanoparticle and the nonlocal parameter is low the resonant frequency is around 8 -30 GHz depending on the mode shape. As the mass of the attached nanoparticle and the nonlocal parameter gets larger the resonant frequency drops down to a MHz range which is closer to experimentally obtained results [19,50,51].…”
Section: Mathematical Problems In Engineeringsupporting
confidence: 89%
“…(ii) For small dimensions of SLGS or DLGS the natural or resonant frequencies in MHz range (obtained in experimental investigations [19,50,51]) could be obtained by the nonlocal theory in the absence of dissipation mechanisms, only if the nonlocal parameter is greater than 20 nm.…”
Section: Discussionmentioning
confidence: 99%
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“…Therefore, our findings confirm that the G/substrate distance plays an important role on NH3 graphene-sensor characteristics such as change transfer, resistance response and recovering. Additionally, it confirms that in order to develop new graphene sensors one must to consider the substrate engineering as a fundamental step during the devices fabrication[27][28][29][30].…”
mentioning
confidence: 73%