Epitaxial graphene gas sensors on SiC substrate with high sensitivity

Chen, Yu; Liu, Qingbin; He, Zezhao; Gao, Xiao; Wu, Enhua; Guo, Jenhwa; Zhou, Chuangjie; Feng, Zhihong

doi:10.1088/1674-4926/41/3/032101

Cited by 19 publications

(11 citation statements)

References 30 publications

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“…As a breakthrough outcome, recently, the electronic kilogram has been introduced. During the last decade, large efforts have been made to develop epitaxial graphene-based sensors for the detection of NO 2 [11][12][13], polar protic and polar aprotic vapors [14], solvents [15,16], Hall effect [17,18], illicit drugs (amphetamine or cocaine) [19], toxic heavy metals (cadmium, lead, and mercury) [20][21][22][23][24][25], ultraviolet (UV) light [26], and terahertz waves [27], etc. Notably, the above-listed examples of sensing applications concern only unmodified pristine epitaxial graphene.…”

Section: Introductionmentioning

confidence: 99%

Epitaxial Graphene on 4H-SiC (0001) as a Versatile Platform for Materials Growth: Mini-Review

2021

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Material growth on a dangling-bond-free interface such as graphene is a challenging technological task, which usually requires additional surface pre-treatment steps (functionalization, seed layer formation) to provide enough reactive sites. Being one of the most promising and adaptable graphene-family materials, epitaxial graphene on SiC, due to its internal features (substrate-induced n-doping, compressive strain, terrace-stepped morphology, bilayer graphene nano-inclusions), may provide pre-conditions for the enhanced binding affinity of environmental species, precursor molecules, and metal atoms on the topmost graphene layer. It makes it possible to use untreated pristine epitaxial graphene as a versatile platform for the deposition of metals and insulators. This mini-review encompasses relevant aspects of magnetron sputtering and electrodeposition of selected metals (Au, Ag, Pb, Hg, Cu, Li) and atomic layer deposition of insulating Al2O3 layers on epitaxial graphene on 4H-SiC, focusing on understanding growth mechanisms. Special deliberation has been given to the effect of the deposited materials on the epitaxial graphene quality. The generalization of the experimental and theoretical results presented here is hopefully an important step towards new electronic devices (chemiresistors, Schottky diodes, field-effect transistors) for environmental sensing, nano-plasmonics, and biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Epitaxial Graphene on 4H-SiC (0001) as a Versatile Platform for Materials Growth: Mini-Review

2021

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“…31 In this work, the relationship between current and voltage was measured to study the sensitivity, with ethanol concentration varying from 400 to 900 ppm. 32 In this paper, ethanol concentration was measured by an ethanol sensor. Figure 4a shows that the current increases with voltage.…”

Section: Resultsmentioning

confidence: 99%

High-Sensitivity and Ultrafast-Response Ethanol Sensors Based on Graphene Oxide

Zhu

Zhang

Xie

et al. 2020

ACS Appl. Mater. Interfaces

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Ethanol sensors with ultrafast response and high sensitivity have attracted much attention to be applied to daily industrial production processes. In this work, graphene oxide–aniline (GOA) sensors are proposed to meet the requirements of detecting ethanol concentration. Graphene oxide is an outstanding material that has excellent electrical and thermal conductivity, large specific surface area, and high carrier mobility. Because of its special bonding reactions, GOA has advantages of good dispersibility, good electrical conductivity, insolubility in water, and strong plasticity. When testing ethanol concentration with sensors, there will be a lag time, which determines the sensitivity of the sensors. To the best of our knowledge, the GOA sensors in this work have the fastest response time, which is only 27 ms. The GOA ethanol sensors show a good ethanol sensing performance, including excellent sensitivity, cycle stability, and long-term stability.

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“…Much research has revealed the interactions among rivers, lakes and marshes, and proved the importance of river, lake and marsh protection and restoration from a system perspective. Yu et al (2020) monitored the water surface rate of river-lake-marsh systems in China from 1990 to 2010.…”

Section: Introductionmentioning

confidence: 99%

Environmental flow mechanism and management for river–lake‐marsh systems

Yin

Peng

Zhou

2022

Hydrological Processes

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Sustaining environmental flows (e‐flows) is a basic requirement for river, lake and marsh management. Rivers, lakes and marshes have close hydrological and ecological connections in a river basin, and form river–lake‐marsh systems. Any measure that is designed to address problems related to only one of these water bodies in isolation of the others may lead to unexpected, undesired and sub‐optimal consequences for one or all of the water bodies. Papers were selected for this special issue ‘Environmental Flow Mechanism and Management for River‐Lake‐Marsh Systems’ to illustrate recent advances in revealing new mechanisms connecting hydrological and environmental/ecological processes, developing new methods for e‐flow calculation, and establishing new measures for e‐flow management.

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Epitaxial graphene gas sensors on SiC substrate with high sensitivity

Cited by 19 publications

References 30 publications

Epitaxial Graphene on 4H-SiC (0001) as a Versatile Platform for Materials Growth: Mini-Review

Epitaxial Graphene on 4H-SiC (0001) as a Versatile Platform for Materials Growth: Mini-Review

High-Sensitivity and Ultrafast-Response Ethanol Sensors Based on Graphene Oxide

Environmental flow mechanism and management for river–lake‐marsh systems

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