PMID- 27057642
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160901
LR  - 20160420
IS  - 1361-648X (Electronic)
IS  - 0953-8984 (Linking)
VI  - 28
IP  - 18
DP  - 2016 May 11
TI  - Tailoring the electrical properties of MoS2 field effect transistors by 
      depositing Au nanoparticles and alkanethiol molecules.
PG  - 184003
LID - 10.1088/0953-8984/28/18/184003 [doi]
AB  - We fabricated and characterized MoS2 field effect transistors. First, we measured 
      the electrical properties of MoS2 field effect transistors (FETs) that were made 
      with mechanically exfoliated MoS2 flakes. Then, we deposited Au nanoparticles on 
      the MoS2 channel and measured the electrical properties. We observed whether the 
      source-drain current increased or decreased after the Au particles were 
      deposited. The deposited Au particles either formed an extra current path and 
      increased the current or behaved as charge-withdrawing sites and decreased the 
      current. Next, we deposited alkanethiol molecules on the Au particles to reduce 
      the work function of the Au. Alkanethiol molecules are known to form a 
      self-assembled monolayer on the Au surface, and the electric dipole moment of the 
      molecules causes the work function of the Au to decrease. Au particles can 
      capture electrons from the MoS2 channel due to their high work function. However, 
      the decreased work function of the Au particles subjected to alkanethiol 
      treatment could cause captured electrons to be released from the Au particles to 
      MoS2. Therefore, the current increased after alkanethiol treatment. This study 
      may provide useful methods to utilize surface treatments with particles and 
      molecules to tailor the electrical properties of MoS2-based FETs.
FAU - Cho, Kyungjune
AU  - Cho K
AD  - Department of Physics and Astronomy, and Institute of Applied Physics, Seoul 
      National University, Seoul 08826, Korea.
FAU - Jeong, Hyunhak
AU  - Jeong H
FAU - Kim, Tae-Young
AU  - Kim TY
FAU - Pak, Jinsu
AU  - Pak J
FAU - Kim, Jae-Keun
AU  - Kim JK
FAU - Choi, Barbara Yuri
AU  - Choi BY
FAU - Lee, Takhee
AU  - Lee T
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160408
PL  - England
TA  - J Phys Condens Matter
JT  - Journal of physics. Condensed matter : an Institute of Physics journal
JID - 101165248
EDAT- 2016/04/09 06:00
MHDA- 2016/04/09 06:01
CRDT- 2016/04/09 06:00
PHST- 2016/04/09 06:00 [entrez]
PHST- 2016/04/09 06:00 [pubmed]
PHST- 2016/04/09 06:01 [medline]
AID - 10.1088/0953-8984/28/18/184003 [doi]
PST - ppublish
SO  - J Phys Condens Matter. 2016 May 11;28(18):184003. doi: 
      10.1088/0953-8984/28/18/184003. Epub 2016 Apr 8.