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Title: Infrared spectroscopy of large scale single layer graphene on self assembled organic monolayer

Abstract

We study the effect of self-assembled monolayer (SAM) organic molecule substrate on large scale single layer graphene using infrared transmission measurement on Graphene/SAM/SiO{sub 2}/Si composite samples. From the Drude weight of the chemically inert CH{sub 3}-SAM, the electron-donating NH{sub 2}-SAM, and the SAM-less graphene, we determine the carrier density doped into graphene by the three sources—the SiO{sub 2} substrate, the gas-adsorption, and the functional group of the SAM's—separately. The SAM-treatment leads to the low carrier density N ∼ 4 × 10{sup 11} cm{sup −2} by blocking the dominant SiO{sub 2}- driven doping. The carrier scattering increases by the SAM-treatment rather than decreases. However, the transport mobility is nevertheless improved due to the reduced carrier doping.

Authors:
; ; ; ;  [1]
  1. Department of Chemistry, Seoul National University, Seoul 151-742 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22280556
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; ADSORPTION; CARRIER DENSITY; CARRIER MOBILITY; CHANNELING; CHARGE CARRIERS; ELECTRONS; GRAPHENE; HETEROJUNCTIONS; INFRARED SPECTRA; INTERFACES; MOLECULES; SILICON; SILICON OXIDES; SUBSTRATES

Citation Formats

Woo Kim, Nak, Youn Kim, Joo, Lee, Chul, Choi, E. J., E-mail: echoi@uos.ac.kr, Jin Kim, Sang, and Hee Hong, Byung. Infrared spectroscopy of large scale single layer graphene on self assembled organic monolayer. United States: N. p., 2014. Web. doi:10.1063/1.4863416.
Woo Kim, Nak, Youn Kim, Joo, Lee, Chul, Choi, E. J., E-mail: echoi@uos.ac.kr, Jin Kim, Sang, & Hee Hong, Byung. Infrared spectroscopy of large scale single layer graphene on self assembled organic monolayer. United States. https://doi.org/10.1063/1.4863416
Woo Kim, Nak, Youn Kim, Joo, Lee, Chul, Choi, E. J., E-mail: echoi@uos.ac.kr, Jin Kim, Sang, and Hee Hong, Byung. 2014. "Infrared spectroscopy of large scale single layer graphene on self assembled organic monolayer". United States. https://doi.org/10.1063/1.4863416.
@article{osti_22280556,
title = {Infrared spectroscopy of large scale single layer graphene on self assembled organic monolayer},
author = {Woo Kim, Nak and Youn Kim, Joo and Lee, Chul and Choi, E. J., E-mail: echoi@uos.ac.kr and Jin Kim, Sang and Hee Hong, Byung},
abstractNote = {We study the effect of self-assembled monolayer (SAM) organic molecule substrate on large scale single layer graphene using infrared transmission measurement on Graphene/SAM/SiO{sub 2}/Si composite samples. From the Drude weight of the chemically inert CH{sub 3}-SAM, the electron-donating NH{sub 2}-SAM, and the SAM-less graphene, we determine the carrier density doped into graphene by the three sources—the SiO{sub 2} substrate, the gas-adsorption, and the functional group of the SAM's—separately. The SAM-treatment leads to the low carrier density N ∼ 4 × 10{sup 11} cm{sup −2} by blocking the dominant SiO{sub 2}- driven doping. The carrier scattering increases by the SAM-treatment rather than decreases. However, the transport mobility is nevertheless improved due to the reduced carrier doping.},
doi = {10.1063/1.4863416},
url = {https://www.osti.gov/biblio/22280556}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 4,
volume = 104,
place = {United States},
year = {Mon Jan 27 00:00:00 EST 2014},
month = {Mon Jan 27 00:00:00 EST 2014}
}