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Shin, Hyeon Suk
Lab for Carbon and 2D Materials
Research Interests
  • Two-dimensional materials: graphene, transition metal dichalcogenides, h-BN, and their heterostructures

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Spatially resolved spontaneous reactivity of diazonium salt on edge and basal plane of graphene without surfactant and its doping effect

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Title
Spatially resolved spontaneous reactivity of diazonium salt on edge and basal plane of graphene without surfactant and its doping effect
Author
Lim, HyunseobLee, Ji SookShin, Hyun-JoonShin, Hyeon SukChoi, Hee Cheul
Issue Date
2010-07
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.26, no.14, pp.12278 - 12284
Abstract
The site-dependent and spontaneous functionalization of 4-bromobenzene diazonium tetralluoroborate (4-BBDT) and its doping effect on a mechanically exfoliated graphene (MEG) were investigated. The spatially resolved Raman spectra obtained from both edge and basal region of MEG revealed that 4-BBDT molecules were noncovalently functionalized on the basal region of MEG, while they were covalently bonded to the edge of MEG. The chemical doping effect induced by noncovalently functionalized 4-BBDT molecules on a basal plane region of MEG was successfully explicated by Raman spectroscopy. The position of Fermi level of MEG and the type of doping charge carrier induced by the noncovalently adsorbed 4-BBDT molecules were determined from systematic G band and 2D band changes. The successful spectroscopic elucidation of the different bonding characters of 4-BBDT depending on the site of graphene is beneficial for the fundamental studies about the charge transfer phenomena of graphene as well as for the potential applications, such as electronic devices, hybridized composite structures, etc.
URI
https://scholarworks.unist.ac.kr/handle/201301/3444
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77956677097
DOI
10.1021/la101254k
ISSN
0743-7463
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CHM_Journal Papers
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