AVS 51st International Symposium
    Nanometer-scale Science and Technology Tuesday Sessions
       Session NS-TuP

Paper NS-TuP17
Synthesis and Property of Carbon Nanosheets at Different Deposition Temperatures

Tuesday, November 16, 2004, 4:00 pm, Room Exhibit Hall B

Session: Poster Session
Presenter: M.Y. Zhu, College of William and Mary
Authors: M.Y. Zhu, College of William and Mary
J.J. Wang, College of William and Mary
X. Zhao, College of William and Mary
R.A. Outlaw, College of William and Mary
D.M. Manos, College of William and Mary
B.C. Holloway, College of William and Mary
Correspondent: Click to Email
Carbon nanosheets, a novel form of free-standing graphite sheets with thickness less than 1 nanometer, were synthesized by radio-frequency (13.56MHz) plasma enhanced chemical vapor deposition (PECVD) on Silicon, quartz and tungsten foil. Carbon source, methane (CH@sub 4@), was diluted in hydrogen (H@sub 2@) to produce carbon nanosheets at various temperatures 650°C to 900°C. SEM images show that the surface morphology of carbon nanosheets varies a lot with deposition temperature. Lower deposition temperatures produce large, smooth nanosheets while higher temperatures produce small, corrugated nanosheets. Raman spectroscopy indicates that the crystallinity of nanosheets deteriorates with increasing substrate temperature. Diode I-V curves were acquired to study the field emission property of nanosheets grown at different temperatures, and yield a turn on field of as low as 4 V/µm.