P-Type Doping of Graphene Films by Hybridization with Nickel Nanoparticles

Su Il Lee; Wooseok Song; Yooseok Kim; Inkyung Song; Dae Sung Jung; Min Wook Jung; Myoung-Jun Cha; Sang Eun Park; Ki-Seok An; Chong-Yun Park

doi:10.7567/JJAP.52.075101

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P-Type Doping of Graphene Films by Hybridization with Nickel Nanoparticles

Su Il Lee¹, Wooseok Song^1,3, Yooseok Kim¹, Inkyung Song¹, Dae Sung Jung², Min Wook Jung³, Myoung-Jun Cha¹, Sang Eun Park¹, Ki-Seok An³ and Chong-Yun Park^1,2

Published 12 June 2013 • Copyright (c) 2013 The Japan Society of Applied Physics
Japanese Journal of Applied Physics, Volume 52, Number 7R

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Author affiliations

¹ BK21 Physics Research Division, Sungkyunkwan University, Suwon, Gyeonggi 440-746, Republic of Korea

² Department of Energy Science, Sungkyunkwan University, Suwon, Gyeonggi 440-746, Republic of Korea

³ Thin Film Materials Research Group, Korea Research Institute of Chemical Technology (KRICT), Yuseong Post Office Box 107, Daejeon 305-600, Republic of Korea

Dates

Received 28 December 2012
Accepted 7 April 2013
Published 12 June 2013

Citation

Su Il Lee et al 2013 Jpn. J. Appl. Phys. 52 075101

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DOI

https://doi.org/10.7567/JJAP.52.075101

PACS

81.05.ue, 81.07.Wx, 81.40.Ef

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Abstract

Here, we demonstrate the decoration of Ni nanoparticles (NPs) on graphene films by simple annealing for p-type doping of graphene. Scanning electron microscopy and atomic force microscopy revealed that high-density, uniformly sized Ni NPs were formed on the graphene films. The density of the Ni NPs increased gradually, whereas the size of the Ni NPs decreased with increasing NiCl₂ centerdot 6H₂O solution concentration. The formation of Ni NPs on graphene films was explained by heat-driven dechlorination and subsequent nano-particlization, as investigated by X-ray photoelectron spectroscopy. The doping effect of Ni NPs onto graphene films was verified by Raman spectroscopy and electrical transport measurements. This method may provide a facile and universal way to obtain metal NPs on graphene if the metal forms a compound with Cl.

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