2013
DOI: 10.1038/srep02597
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Standardization of surface potential measurements of graphene domains

Abstract: We compare the three most commonly used scanning probe techniques to obtain a reliable value of the work function in graphene domains of different thickness. The surface potential (SP) of graphene is directly measured in Hall bar geometry via a combination of electrical functional microscopy and spectroscopy techniques, which enables calibrated work function measurements of graphene domains in ambient conditions with values Φ1LG ~4.55 ± 0.02 eV and Φ2LG ~ 4.44 ± 0.02 eV for single- and bi-layer, respectively. … Show more

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Cited by 208 publications
(207 citation statements)
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“…Subsequent carbon layers are strongly n doped due to the influence of this carbon buffer layer [9,10,10,11]. There have been several successful experimental studies of using graphene grown on SiC as a NO 2 sensor [3,4,[12][13][14][15][16]. At sufficiently high concentrations of NO 2 , an n to p type shift of the graphene layer was found [4,12,14].…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Subsequent carbon layers are strongly n doped due to the influence of this carbon buffer layer [9,10,10,11]. There have been several successful experimental studies of using graphene grown on SiC as a NO 2 sensor [3,4,[12][13][14][15][16]. At sufficiently high concentrations of NO 2 , an n to p type shift of the graphene layer was found [4,12,14].…”
Section: Introductionmentioning
confidence: 99%
“…Although improvements are constantly being achieved in this area, most epitaxial graphene samples contain up to 5% bilayer coverage on an otherwise uniform monolayer sample [15]. This can have unintended consequences on the efficiency of the sensing device.…”
Section: Introductionmentioning
confidence: 99%
“…Было установлено, что разность потенциалов между светлыми и темными областями составляет ∼ 140 мВ. Такое значе-ние соответствует разности поверхностных потенциалов между одно-и двухслойным графеном [15,16]. При этом светлые области на рис.…”
Section: данные асмunclassified
“…33 As KPFM is only sensitive to the surface of a material, it was necessary to fabricate samples without the gate oxide present. Prior to performing KPFM, AFM cleaning was performed in contact mode to remove contaminants and residues from the surface.…”
Section: -5mentioning
confidence: 99%