TY - GEN
T1 - Field emission from nanocrystalline diamond/carbon nanowall composite films deposited on scratched substrates
AU - Cheng, C. Y.
AU - Nakashima, M.
AU - Teii, K.
N1 - Funding Information:
This research was supported in part by a Grant-in-Aid for Scientific Research (C) from the Japan Society for the Promotion of Science.
PY - 2012
Y1 - 2012
N2 - We report the deposition and field emission properties of nanostructured composites consisting of carbon nanowalls (CNWs) and nanocrystalline diamond films by introducing two kinds of substrate scratching pretreatment, i.e., undulation and ultrasonic vibration. With increasing duration of scratching pretreatment, the morphology of the deposits changes from simple CNWs to a film/CNW composite and lastly to CNWs on a film, and then the space between the walls is increased. The emission turn-on field is reduced from 2.1 V/μm for simple CNWs to around 1.2 V/μm for the composite films, accompanied by an increase in field enhancement factor. The results indicate that electric field screening between the walls is successfully suppressed by widening of the wall spacing.
AB - We report the deposition and field emission properties of nanostructured composites consisting of carbon nanowalls (CNWs) and nanocrystalline diamond films by introducing two kinds of substrate scratching pretreatment, i.e., undulation and ultrasonic vibration. With increasing duration of scratching pretreatment, the morphology of the deposits changes from simple CNWs to a film/CNW composite and lastly to CNWs on a film, and then the space between the walls is increased. The emission turn-on field is reduced from 2.1 V/μm for simple CNWs to around 1.2 V/μm for the composite films, accompanied by an increase in field enhancement factor. The results indicate that electric field screening between the walls is successfully suppressed by widening of the wall spacing.
UR - http://www.scopus.com/inward/record.url?scp=84865037149&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84865037149&partnerID=8YFLogxK
U2 - 10.1557/opl.2012.13
DO - 10.1557/opl.2012.13
M3 - Conference contribution
AN - SCOPUS:84865037149
SN - 9781605113722
T3 - Materials Research Society Symposium Proceedings
SP - 87
EP - 91
BT - Diamond Electronics and Biotechnology - Fundamentals to Applications V
T2 - 2011 MRS Fall Meeting
Y2 - 28 November 2011 through 2 December 2011
ER -