User profiles for Angel Koh
Angel KohNational University of Singapore Verified email at u.nus.edu Cited by 655 |
Low partial pressure chemical vapor deposition of graphene on copper
A systematic study of the Cu-catalyzed chemical vapor deposition of graphene under
extremely low partial pressure is carried out. A carbon precursor supply of just $\it P$ $\bf_{CH_4}$ …
extremely low partial pressure is carried out. A carbon precursor supply of just $\it P$ $\bf_{CH_4}$ …
Comparison of the mechanism of low defect few-layer graphene fabricated on different metals by pulsed laser deposition
Carbon segregation using metal substrates has been given increasing attention as an
alternative graphene growth method due to its reduced temperature. However, not every metal …
alternative graphene growth method due to its reduced temperature. However, not every metal …
Development of an amorphous selenium-based photodetector driven by a diamond cold cathode
Amorphous-selenium (a-Se) based photodetectors are promising candidates for imaging
devices, due to their high spatial resolution and response speed, as well as extremely high …
devices, due to their high spatial resolution and response speed, as well as extremely high …
Effective hybrid graphene/carbon nanotubes field emitters by electrophoretic deposition
Hybrid graphene and carbon nanotube (CNT) field emitters were fabricated with electrophoretic
deposition (EPD). The combination of both materials was used to improve the turn-on …
deposition (EPD). The combination of both materials was used to improve the turn-on …
Effective large-area free-standing graphene field emitters by electrophoretic deposition
Large area graphene field emitters were fabricated using electrophoretic deposition. By
varying the deposition time, we were able to fabricate emitters with varied field enhancement …
varying the deposition time, we were able to fabricate emitters with varied field enhancement …
Conditions for a carrier multiplication in amorphous-selenium based photodetector
Amorphous selenium is a promising candidate for high sensitivity photodetector due to its
unique carrier multiplication phenomenon. More than 10 carriers can be generated per …
unique carrier multiplication phenomenon. More than 10 carriers can be generated per …
A transparent ultraviolet triggered amorphous selenium pn junction
…, Y Kudo, T Masuzawa, T Yamada, A Koh… - Applied Physics …, 2011 - pubs.aip.org
This paper will introduce a semitransparent amorphous selenium (a-Se) film exhibiting
photovoltaic effects under ultraviolet light created through a simple and inexpensive method. We …
photovoltaic effects under ultraviolet light created through a simple and inexpensive method. We …
Low temperature direct of graphene onto metal nano‐spindt tip with applications in electron emission
Graphene has been known for its superior electronic properties ever since its discovery in
2004. The high aspect ratio and ballistic transport properties exhibited by this one‐…
2004. The high aspect ratio and ballistic transport properties exhibited by this one‐…
High quantum efficiency UV detection using a‐Se based photodetector
High‐sensitivity ultraviolet (UV) photodetection has been attempted by utilizing the carrier
multiplication effect in amorphous selenium. The prototype photodetector presented in this …
multiplication effect in amorphous selenium. The prototype photodetector presented in this …
Hydrogenation and its effects on the field emission characteristics of tetrahedral amorphous carbon coated carbon nanotubes
J Yu, YM Foong, ATT Koh… - The Journal of Physical …, 2011 - ACS Publications
Field emission (FE) properties of a core/shell multiwalled carbon nanotube/tetrahedral
amorphous carbon (CNT/ta-C) structure both with and without hydrogenation post-treatment were …
amorphous carbon (CNT/ta-C) structure both with and without hydrogenation post-treatment were …