Hsuan-Chen Chang
National Taiwan University of Science and Technology
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Publication
Featured researches published by Hsuan-Chen Chang.
Nanoscale Research Letters | 2015
Pao-Hung Lin; Cong-Lin Sie; Ching-An Chen; Hsuan-Chen Chang; Yi-Ting Shih; Hsin-Yueh Chang; Wei-Jhih Su; Kuei-Yi Lee
In this study, we performed thermal chemical vapor deposition for growing vertically aligned carbon nanotube (VACNT) bundles for a field emitter and applied photolithography for defining the arrangement pattern to simultaneously compare square and hexagonal arrangements by using two ratios of the interbundle distance to the bundle height (R) of field emitters. The hexagon arrangement with R = 2 had the lowest turn-on electric field (Eto) and highest enhancement factor, whereas the square arrangement with R = 3 had the most stable field emission (FE) characteristic. The number density can reveal the correlation to the lowest Eto and highest enhancement factor more effectively than can the R or L. The fluorescent images of the synthesized VACNT bundles manifested the uniformity of FE currents. The results of our study indicate the feasibility of applying the VACNT field emitter arrangement to achieve optimal FE performance.
Applied Physics Express | 2014
Hsuan-Chen Chang; Y. S. Huang; Hsin-Yueh Chang; Wei-Jhih Su; Yi-Ting Shih; Ying-Sheng Huang; Kuei-Yi Lee
A simple method was found to observe the semiconducting behavior of graphene using the O2 gas adsorption property. Graphene was synthesized by thermal chemical vapor deposition with NH3 as the nitrogen doping source. The current response increased significantly when the p-type graphene was exposed to an O2 environment. The current response decreased gradually when the nitrogen content was increased. When the NH3 flow rate was increased to 80 sccm during graphene synthesis, the p-type graphene becomes n-type and the nitrogen-doped graphene current response clearly decreases during O2 gas adsorption measurements. We measured the graphene Dirac point using a field-effect transistor to define the graphene semiconducting properties. These results show that gas adsorption measurements can reveal the graphene semiconducting performance and also the n-type graphene synthesis conditions.
conference on lasers and electro optics | 2013
Yung Jr Hung; San-Liang Lee; Hsuan-Chen Chang; Kuei-Yi Lee; Ying-Sheng Huang
Released electrostatic screening effect and Joule heating in bundle arrays of carbon-nanotube-on-silicon-nanowire heterojunctions realized with novel fabrication approach enables efficient field emission of 0.9 V/μm turn-on field and >5 mA/cm current density.
Applied Surface Science | 2012
Hsuan-Chen Chang; Hsin-Yueh Chang; Wei-Jhih Su; Kuei-Yi Lee; Wen-Ching Shih
Vacuum | 2013
Hsin-Yueh Chang; Hsuan-Chen Chang; Kuei-Yi Lee
Journal of Alloys and Compounds | 2016
Wei-Jhih Su; Hsuan-Chen Chang; Yi-Ting Shih; Yi-Ping Wang; Hung-Pin Hsu; Ying-Sheng Huang; Kuei-Yi Lee
Materials Science and Engineering B-advanced Functional Solid-state Materials | 2014
Y. S. Huang; Hsin-Yueh Chang; Hsuan-Chen Chang; Yi-Ting Shih; Wei-Jhih Su; Chen-Hong Ciou; Yi-Ling Chen; Shin-ichi Honda; Ying-Sheng Huang; Kuei-Yi Lee
Thin Solid Films | 2014
Yung-Jr Hung; San-Liang Lee; Looi Choon Beng; Hsuan-Chen Chang; Y. S. Huang; Kuei-Yi Lee; Ying-Sheng Huang
Applied Surface Science | 2015
Hsin-Yueh Chang; Y. S. Huang; Hsuan-Chen Chang; Wei-Jhih Su; Yi-Ting Shih; John L. Chen; Shin-ichi Honda; Ying-Sheng Huang; Kuei-Yi Lee
Nanoscale Research Letters | 2014
Yung-Jr Hung; Y. S. Huang; Hsuan-Chen Chang; Kuei-Yi Lee; San-Liang Lee