High sensitive quasi freestanding epitaxial graphene gas sensor on 6H-SiC

I. Iezhokin; P. Offermans; S.H. Brongersma; A.J.M. Giesbers; C.F.J. Flipse

doi:10.1063/1.4816762

High sensitive quasi freestanding epitaxial graphene gas sensor on 6H-SiC

I. Iezhokin, P. Offermans, S.H. Brongersma, A.J.M. Giesbers, C.F.J. Flipse

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Abstract

We have measured the electrical response to NO2, N2, NH3, and CO for epitaxial graphene and quasi freestanding epitaxial graphene on 6H-SiC substrates. Quasi freestanding epitaxial graphene shows a 6 fold increase in NO2 sensitivity compared to epitaxial graphene. Both samples show a sensitivity better than the experimentally limited 1¿ppb. The strong increase in sensitivity of quasi freestanding epitaxial graphene can be explained by a Fermi-energy close to the Dirac point, leading to a strongly surface doping dependent sample resistance. Both sensors show a negligible sensitivity to N2, NH3, and CO.

Original language	English
Pages (from-to)	053514-1/5
Number of pages	5
Journal	Applied Physics Letters
Volume	103
Issue number	5
DOIs	https://doi.org/10.1063/1.4816762
Publication status	Published - 2013

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title = "High sensitive quasi freestanding epitaxial graphene gas sensor on 6H-SiC",

abstract = "We have measured the electrical response to NO2, N2, NH3, and CO for epitaxial graphene and quasi freestanding epitaxial graphene on 6H-SiC substrates. Quasi freestanding epitaxial graphene shows a 6 fold increase in NO2 sensitivity compared to epitaxial graphene. Both samples show a sensitivity better than the experimentally limited 1¿ppb. The strong increase in sensitivity of quasi freestanding epitaxial graphene can be explained by a Fermi-energy close to the Dirac point, leading to a strongly surface doping dependent sample resistance. Both sensors show a negligible sensitivity to N2, NH3, and CO.",

author = "I. Iezhokin and P. Offermans and S.H. Brongersma and A.J.M. Giesbers and C.F.J. Flipse",

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T1 - High sensitive quasi freestanding epitaxial graphene gas sensor on 6H-SiC

AU - Iezhokin, I.

AU - Offermans, P.

AU - Brongersma, S.H.

AU - Giesbers, A.J.M.

AU - Flipse, C.F.J.

PY - 2013

Y1 - 2013

N2 - We have measured the electrical response to NO2, N2, NH3, and CO for epitaxial graphene and quasi freestanding epitaxial graphene on 6H-SiC substrates. Quasi freestanding epitaxial graphene shows a 6 fold increase in NO2 sensitivity compared to epitaxial graphene. Both samples show a sensitivity better than the experimentally limited 1¿ppb. The strong increase in sensitivity of quasi freestanding epitaxial graphene can be explained by a Fermi-energy close to the Dirac point, leading to a strongly surface doping dependent sample resistance. Both sensors show a negligible sensitivity to N2, NH3, and CO.

AB - We have measured the electrical response to NO2, N2, NH3, and CO for epitaxial graphene and quasi freestanding epitaxial graphene on 6H-SiC substrates. Quasi freestanding epitaxial graphene shows a 6 fold increase in NO2 sensitivity compared to epitaxial graphene. Both samples show a sensitivity better than the experimentally limited 1¿ppb. The strong increase in sensitivity of quasi freestanding epitaxial graphene can be explained by a Fermi-energy close to the Dirac point, leading to a strongly surface doping dependent sample resistance. Both sensors show a negligible sensitivity to N2, NH3, and CO.

U2 - 10.1063/1.4816762

DO - 10.1063/1.4816762

M3 - Article

SN - 0003-6951

VL - 103

SP - 053514-1/5

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

ER -

High sensitive quasi freestanding epitaxial graphene gas sensor on 6H-SiC

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