Graphene-based gas sensor: metal decoration effect and application to a flexible device

Cho, Byungjin; Yoon, Jongwon; Hahm, Myung Gwan; Kim, Dongho; Kim, Ah Ra; Kahng, Yung Ho; Park, Sang-Won; Lee, Young‐Joo; Park, Sung‐Gyu; Kwon, Jung‐Dae; Kim, Chang-Su; Song, Myungkwan; Jeong, Yongsoo; Nam, Kee‐Seok; Ko, Heung Cho

doi:10.1039/c4tc00510d

Cited by 203 publications

(107 citation statements)

References 41 publications

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“…Apart from dopants and defects, other chemical functionalization methods such as modification with metal and metal oxide nanoparticles (NPs) and polymers have also been studied. Compared to pristine graphene and rGO, sensors based on graphene/rGO modified with nanoparticles of metals or metal oxides have demonstrated highly sensitive and selective sensing behavior [128][129][130][131][132][133][134][135], which could be attributed to large changes in the electronic properties of graphene/rGO upon gas exposure due to the synergistic effects of NPs and graphene/rGO.…”

Section: Graphenementioning

confidence: 99%

“…Cho and his co-workers proved that the introduction of aluminium (Al) NPs and Pd NPs on graphene lead to improved sensitivity of graphene to NO2 and NH3 gases respectively [129]. Wang et al [130] fabricated gas sensors based on rGO functionalized with platinum (Pt) NPs by mid-temperature thermal annealing and alternating current dielectrophoretic technique, which allowed for efficient sensing of multiple gases.…”

Section: Graphenementioning

confidence: 99%

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Two-Dimensional Materials for Sensing: Graphene and Beyond

Varghese²,

et al. 2015

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Two-dimensional materials have attracted great scientific attention due to their unusual and fascinating properties for use in electronics, spintronics, photovoltaics, medicine, composites, etc. Graphene, transition metal dichalcogenides such as MoS2, phosphorene, etc., which belong to the family of two-dimensional materials, have shown great promise for gas sensing applications due to their high surface-to-volume ratio, low noise and sensitivity of electronic properties to the changes in the surroundings. Two-dimensional nanostructured semiconducting metal oxide based gas sensors have also been recognized as successful gas detection devices. This review aims to provide the latest advancements in the field of gas sensors based on various two-dimensional materials with the main focus on sensor performance metrics such as sensitivity, specificity, detection limit, response time, and reversibility. Both experimental and theoretical studies on the gas sensing properties of graphene and other two-dimensional materials beyond graphene are also discussed. The article concludes with the current challenges and future prospects for two-dimensional materials in gas sensor applications. OPEN ACCESSElectronics 2015, 4 652

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Section: Graphenementioning

confidence: 99%

Section: Graphenementioning

confidence: 99%

Two-Dimensional Materials for Sensing: Graphene and Beyond

Varghese²,

et al. 2015

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“…Resistance measurements provide a highly sensitive means of determining the presence of molecular adsorbants on a graphene surface. Ensuring selectivity towards a particular molecule is more challenging, but can be achieved by functionalizing the surface with metallic dopants [1,2] or by analyzing the low-frequency noise after molecular adsorption [3]. Graphene-based NO 2 sensors have been shown to detect concentrations below 1 part per billion (ppb) [4,5].…”

Section: Introductionmentioning

confidence: 99%

Changes in work function due to NO2 adsorption on monolayer and bilayer epitaxial graphene on SiC(0001)

et al. 2016

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The electronic properties of monolayer graphene grown epitaxially on SiC(0001) are known to be highly sensitive to the presence of NO 2 molecules. The presence of small areas of bilayer graphene, on the other hand, considerably reduces the overall sensitivity of the surface. We investigate how NO 2 molecules interact with monolayer and bilayer graphene, both free-standing and on a SiC(0001) substrate. We show that it is necessary to explicitly include the effect of the substrate in order to reproduce the experimental results. When monolayer graphene is present on SiC, there is a large charge transfer from the interface between the buffer layer and the SiC substrate to the molecule. As a result, the surface work function increases by 0.9 eV after molecular adsorption. A graphene bilayer is more effective at screening this interfacial charge, and so the charge transfer and change in work function after NO 2 adsorption is much smaller.

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“…The demands for more invention of applicable materials have attracted a significant amount of research consideration. Over the last decade, graphene has been used as a novel and promising material in terms of gas-sensing characteristic [1] because of its features such as having atom-thick two-dimensional conjugated structures, high conductivity, and large specific surface areas [2]. Nevertheless, the gapless semiconductor characteristic in graphene trammeling it for any purpose semiconductor application unless there is an attempt to alter its structure or applying external perturbation to obtain expected properties.…”

Section: Introductionmentioning

confidence: 99%

The study of electronic structure and properties of silicene for gas sensor application

Wella

Syaputra

Wungu

et al. 2016

AIP Conference Proceedings

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Graphene-based gas sensor: metal decoration effect and application to a flexible device

Abstract: Synergistic combination of metal nanoparticles and graphene modulates electronic properties of graphene, leading to enhancement in gas sensitivity and selectivity.

Cited by 203 publications

References 41 publications

Two-Dimensional Materials for Sensing: Graphene and Beyond

Two-Dimensional Materials for Sensing: Graphene and Beyond

Changes in work function due to NO2 adsorption on monolayer and bilayer epitaxial graphene on SiC(0001)

The study of electronic structure and properties of silicene for gas sensor application

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