The Study of Graphene Gas Sensor

Josef Nahlik; Jan Voves; Alexandr Laposa; Jiri Kroutil

doi:10.4028/www.scientific.net/KEM.605.495

Paper Titles

Preparation of 3d Ferromagnetic Transition Metal Thin Films with Metastable bcc Structure on GaAs(100) Substrates
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Synthesis of Perovskite Sr Doped Lanthanide Cobaltites and Ferrites and Application for Oxygen Sensors: A Comparative Study
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Structure and Epitaxial Behavior of Rutile TiO₂ Thin Films Prepared by DC Magnetron Sputtering and Ex-Situ Annealing
p.487

Enhanced Sensitivity of Pt/NiO Gate Based AlGaN/GaN C-HEMT Hydrogen Sensor
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The Study of Graphene Gas Sensor
p.495

Influence of Metastable States on Electrophysical Properties in Ferroelectric Crystalline Polymers
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Influence of Dipolar Interactions in Ferroelectric Vinylidene Fluoride Copolymers on their Structure and Low-Temperature Molecular Mobility
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Properties of Multilayer NTC Perovskite Thermistors Prepared by Tape Casting, Lamination and Cofiring
p.507

Drift-Like Terms Minimization in the Responses of a Generic Tin Oxide Gas Sensor
p.511

HomeKey Engineering MaterialsKey Engineering Materials Vol. 605The Study of Graphene Gas Sensor

The Study of Graphene Gas Sensor

Abstract:

The graphene is suitable for gas sensing applications for its two dimensional char-acter which gives the best possible ratio between sensor surface and volume. The interactionbetween graphene surface and gas molecules can signicantly change the graphene layer trans-port properties. Therefore graphene can serve as a sensitive layer in a gas sensor. This work isconcentrated on the analysis of the conductivity of graphene layer exposed to dierent gases(NH3, CO2 ...). Together with the electrical measurement on the interdigital graphene sensora simulation based on quantum atomistic approach has been performed. We used ATK toolkitby Quantuwise based on density functional theory (DFT) models. The exchange-correlationpotential is approximated within the generalized gradient approximation (GGA). The trans-port properties of the electrode-device- electrode geometry were calculated by means of non-equilibrium Greens function formalism as implemented in ATK. Experimental conductivitychanges are compared with the simulation results.

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Periodical:

Key Engineering Materials (Volume 605)

Pages:

495-498

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.605.495

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Online since:

April 2014

Authors:

Josef Nahlik*, Jan Voves, Alexandr Laposa, Jiri Kroutil

Keywords:

Gas Sensor, Graphene

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