PMID- 19344151
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20090702
LR  - 20200930
IS  - 1530-6992 (Electronic)
IS  - 1530-6984 (Linking)
VI  - 9
IP  - 5
DP  - 2009 May
TI  - Rational fabrication of graphene nanoribbons using a nanowire etch mask.
PG  - 2083-7
LID - 10.1021/nl900531n [doi]
AB  - We report a rational approach to fabricate graphene nanoribbons (GNRs) with 
      sub-10 nm width by employing chemically synthesized nanowires as the physical 
      protection mask in oxygen plasma etch. Atomic force microscopy study shows that 
      the patterns of the resulted nanoribbons replicate exactly those of mask 
      nanowires so that ribbons or branched or crossed graphene nanostructures can be 
      produced. Our study shows a linear scaling relation between the resulted GNR 
      widths and mask nanowire diameters with variable slopes for different etching 
      times. GNRs with controllable widths down to 6 nm have been demonstrated. We have 
      fabricated GNR field effect transistors (FETs) with nanoribbons directly 
      connected to bulk graphene electrodes. Electrical measurements on an 8 nm GNR-FET 
      show room temperature transistor behavior with an on/off ratio around 160, 
      indicating appreciable band gaps arise due to lateral confinement. We find the 
      on/off ratio in the log scale inversely scales with ribbon width. This approach 
      opens a new avenue to graphene nanoribbons and other graphene nanostructures in 
      the deep nanometer regime without sophisticated lithography. It thus opens 
      exciting new opportunities for graphene nanodevice engineering.
FAU - Bai, Jingwei
AU  - Bai J
AD  - Department of Materials Science and Engineering, University of California, Los 
      Angeles, California 90095, USA.
FAU - Duan, Xiangfeng
AU  - Duan X
FAU - Huang, Yu
AU  - Huang Y
LA  - eng
GR  - 1DP2OD004342-01/OD/NIH HHS/United States
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Nano Lett
JT  - Nano letters
JID - 101088070
EDAT- 2009/04/07 09:00
MHDA- 2009/04/07 09:01
CRDT- 2009/04/07 09:00
PHST- 2009/04/07 09:00 [entrez]
PHST- 2009/04/07 09:00 [pubmed]
PHST- 2009/04/07 09:01 [medline]
AID - 10.1021/nl900531n [doi]
PST - ppublish
SO  - Nano Lett. 2009 May;9(5):2083-7. doi: 10.1021/nl900531n.