Enhancement of integrity of graphene transferred by interface energy modulation

Un Jeong Kim; Jaehyun Hur; Sangmo Cheon; Dae Young Chung; Hyungbin Son; Yeonsang Park; Young Geun Roh; Jineun Kim; Jaesoong Lee; Sang Won Kim; Kyuhyun Im; Nokyoung Park; Juhun Kim; Sungwoo Hwang; Wanjun Park; Chang Won Lee

doi:10.1016/j.carbon.2013.08.010

Enhancement of integrity of graphene transferred by interface energy modulation

Un Jeong Kim, Jaehyun Hur, Sangmo Cheon, Dae Young Chung, Hyungbin Son, Yeonsang Park, Young Geun Roh, Jineun Kim, Jaesoong Lee, Sang Won Kim, Kyuhyun Im, Nokyoung Park, Juhun Kim, Sungwoo Hwang, Wanjun Park, Chang Won Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We report on the systematic studies of the parameters governing the integrity of graphene film during general "wet" transfer from a thermodynamic point of view. We chose polystyrene (PS) as a test carrier material and attempted to use eight different solvents to find optimal conditions for the graphene transfer from a catalyst film to a desired substrate without defects. When parameterizing the conventional chemical properties of solvents, the boiling points and surface tension were found to be critical in determining the quality of the transferred graphene. During the formation step of a conformal PS film on a graphene surface before catalyst etching, a solvent with a boiling point over ∼140 C was essential. During the following PS film removal step, a solvent with surface tension higher than approximately 29 dyn/cm led to the formation of a continuous graphene film without cracks and holes. In addition, a high spin-coating velocity and lower concentration of PS in the solvent enhanced the quality of a transferred graphene film. The UV treatment of Si/SiO₂ (100 nm) was also found to improve the adhesion of the graphene on substrates. By electrical characterization, morphological differences were found to affect the electrical properties markedly.

Original language	English
Pages (from-to)	165-174
Number of pages	10
Journal	Carbon
Volume	65
DOIs	https://doi.org/10.1016/j.carbon.2013.08.010
State	Published - Dec 2013

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10.1016/j.carbon.2013.08.010

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title = "Enhancement of integrity of graphene transferred by interface energy modulation",

abstract = "We report on the systematic studies of the parameters governing the integrity of graphene film during general {"}wet{"} transfer from a thermodynamic point of view. We chose polystyrene (PS) as a test carrier material and attempted to use eight different solvents to find optimal conditions for the graphene transfer from a catalyst film to a desired substrate without defects. When parameterizing the conventional chemical properties of solvents, the boiling points and surface tension were found to be critical in determining the quality of the transferred graphene. During the formation step of a conformal PS film on a graphene surface before catalyst etching, a solvent with a boiling point over ∼140 C was essential. During the following PS film removal step, a solvent with surface tension higher than approximately 29 dyn/cm led to the formation of a continuous graphene film without cracks and holes. In addition, a high spin-coating velocity and lower concentration of PS in the solvent enhanced the quality of a transferred graphene film. The UV treatment of Si/SiO2 (100 nm) was also found to improve the adhesion of the graphene on substrates. By electrical characterization, morphological differences were found to affect the electrical properties markedly.",

author = "Kim, {Un Jeong} and Jaehyun Hur and Sangmo Cheon and Chung, {Dae Young} and Hyungbin Son and Yeonsang Park and Roh, {Young Geun} and Jineun Kim and Jaesoong Lee and Kim, {Sang Won} and Kyuhyun Im and Nokyoung Park and Juhun Kim and Sungwoo Hwang and Wanjun Park and Lee, {Chang Won}",

year = "2013",

month = dec,

doi = "10.1016/j.carbon.2013.08.010",

language = "English",

volume = "65",

pages = "165--174",

journal = "Carbon",

issn = "0008-6223",

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T1 - Enhancement of integrity of graphene transferred by interface energy modulation

AU - Kim, Un Jeong

AU - Hur, Jaehyun

AU - Cheon, Sangmo

AU - Chung, Dae Young

AU - Son, Hyungbin

AU - Park, Yeonsang

AU - Roh, Young Geun

AU - Kim, Jineun

AU - Lee, Jaesoong

AU - Kim, Sang Won

AU - Im, Kyuhyun

AU - Park, Nokyoung

AU - Kim, Juhun

AU - Hwang, Sungwoo

AU - Park, Wanjun

AU - Lee, Chang Won

PY - 2013/12

Y1 - 2013/12

N2 - We report on the systematic studies of the parameters governing the integrity of graphene film during general "wet" transfer from a thermodynamic point of view. We chose polystyrene (PS) as a test carrier material and attempted to use eight different solvents to find optimal conditions for the graphene transfer from a catalyst film to a desired substrate without defects. When parameterizing the conventional chemical properties of solvents, the boiling points and surface tension were found to be critical in determining the quality of the transferred graphene. During the formation step of a conformal PS film on a graphene surface before catalyst etching, a solvent with a boiling point over ∼140 C was essential. During the following PS film removal step, a solvent with surface tension higher than approximately 29 dyn/cm led to the formation of a continuous graphene film without cracks and holes. In addition, a high spin-coating velocity and lower concentration of PS in the solvent enhanced the quality of a transferred graphene film. The UV treatment of Si/SiO2 (100 nm) was also found to improve the adhesion of the graphene on substrates. By electrical characterization, morphological differences were found to affect the electrical properties markedly.

AB - We report on the systematic studies of the parameters governing the integrity of graphene film during general "wet" transfer from a thermodynamic point of view. We chose polystyrene (PS) as a test carrier material and attempted to use eight different solvents to find optimal conditions for the graphene transfer from a catalyst film to a desired substrate without defects. When parameterizing the conventional chemical properties of solvents, the boiling points and surface tension were found to be critical in determining the quality of the transferred graphene. During the formation step of a conformal PS film on a graphene surface before catalyst etching, a solvent with a boiling point over ∼140 C was essential. During the following PS film removal step, a solvent with surface tension higher than approximately 29 dyn/cm led to the formation of a continuous graphene film without cracks and holes. In addition, a high spin-coating velocity and lower concentration of PS in the solvent enhanced the quality of a transferred graphene film. The UV treatment of Si/SiO2 (100 nm) was also found to improve the adhesion of the graphene on substrates. By electrical characterization, morphological differences were found to affect the electrical properties markedly.

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U2 - 10.1016/j.carbon.2013.08.010

DO - 10.1016/j.carbon.2013.08.010

M3 - Article

AN - SCOPUS:84884534502

SN - 0008-6223

VL - 65

SP - 165

EP - 174

JO - Carbon

JF - Carbon

ER -

Enhancement of integrity of graphene transferred by interface energy modulation

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