Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Sun Hong Choi"'
Publikováno v:
Journal of the Korean Society of Marine Environment and Safety. 25:927-935
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef2d0a3946ab04c8ac859da4cdd5006c
https://doi.org/10.7837/kosomes.2019.25.7.927
https://doi.org/10.7837/kosomes.2019.25.7.927
Autor:
Taewon Jung, Ji-Beom Yoo, SeGi Yu, Sun Hong Choi, Jae-Hee Han, In-taek Han, Jong Hyung Choi, Chong-Yun Park, J. M. Kim
Publikováno v:
Journal of Applied Physics. 94:487-490
We controlled the density of carbon nanotubes (CNTs) through in situ NH3 plasma pretreatment and investigated field emission properties with the density variation. Ni catalytic layer was transformed into small nanoparticles with NH3 plasma pretreatme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef6178734723b28dd8586aa81e8596a9
https://doi.org/10.1063/1.1581377
https://doi.org/10.1063/1.1581377
Autor:
Ji-Beom Yoo, Jong Hyung Choi, SeGi Yu, Jae-Hee Han, Sun Hong Choi, J. M. Kim, Tae Young Lee, Taewon Jung, Chong-Yun Park, Whikun Yi, In Taek Han
Publikováno v:
Thin Solid Films. 435:318-323
The effect of NH 3 plasma pre-treatment on the growth characteristics of CNTs was investigated. We observed that NH 3 plasma pre-treatment etched and conglomerated Ni catalyst film, resulting in the formation of Ni nanoparticles. The aligned CNTs fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a07a70ad2f5f38501e8ab99cbacf8dbf
https://doi.org/10.1016/s0040-6090(03)00341-9
https://doi.org/10.1016/s0040-6090(03)00341-9
Autor:
Ji-Beom Yoo, Tae Young Lee, Whikun Yi, SeGi Yu, Chong Yun Park, Jae-Hee Han, Junghee Lee, Jong Min Kim, Sun Hong Choi, Taewon Jung
Publikováno v:
Surface and Coatings Technology. :348-352
Effects of different carbon source gases and catalyst metals on the growth characteristics and emission properties of carbon nanotubes (CNTs) were investigated. As the flow rate ratio of NH3/C3H4 increased, the growth rate of CNTs was enhanced and th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9abd8355cab5ee77fbdfe40558d8d85
https://doi.org/10.1016/s0257-8972(03)00108-7
https://doi.org/10.1016/s0257-8972(03)00108-7
Autor:
Ji-Beom Yoo, Sun Hong Choi, Chong-Yun Park, In Taek Han, Jong Min Kim, Taewon Jung, Jae-Hee Han, Tae Young Lee, SeGi Yu, Whikun Yi
Publikováno v:
Diamond and Related Materials. 12:878-883
In growth of carbon nanotubes (CNTs) using Pt catalyst by plasma enhanced chemical vapor deposition, effects of experimental parameters, such as NH3 plasma pre-treatment, NH3/C2H2 ratio and growth temperature, on the growth characteristics of CNTs we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1be508139c787ecfc7abf5b24c4d8b0d
https://doi.org/10.1016/s0925-9635(03)00029-3
https://doi.org/10.1016/s0925-9635(03)00029-3
Autor:
Sun Hong Choi, Taewon Jung, Ji-Beom Yoo, SeGi Yu, In Taek Han, Jong Hyung Choi, Tae Young Lee, Chong Yun Park, Jae-Hee Han, J. M. Kim, Whikun Yi
Publikováno v:
Diamond and Related Materials. 12:794-798
We controlled the size and distribution of catalytic Ni nanoparticles to control the density and diameter of carbon nanotubes (CNTs). With an increase in plasma power from 30 to 90 W for Ni layer of 30 A, the average diameter of particles decreased f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb17bfe7ea91401700262acbce5b9020
https://doi.org/10.1016/s0925-9635(02)00237-6
https://doi.org/10.1016/s0925-9635(02)00237-6
Autor:
Ji-Beom Yoo, Chong-Yun Park, In Taek Han, W.K. Yi, J. M. Kim, SeGi Yu, Jae-Hee Han, Sun Hong Choi, Taewon Jung, Tae Young Lee
Publikováno v:
Diamond and Related Materials. 12:851-855
We carry out the in situ analysis of chemical species for the growth of carbon nanotubes (CNTs) in direct current plasma enhanced chemical vapor deposition (DC-PECVD) with C 2 H 2 –NH 3 , C 3 H 4 –NH 3 and CO–NH 3 mixtures by optical emission s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0586e39420f4244e833193a74004e868
https://doi.org/10.1016/s0925-9635(02)00290-x
https://doi.org/10.1016/s0925-9635(02)00290-x
Autor:
Sun Hong Choi, Ji-Beom Yoo, SeGi Yu, Gyeong Soo Park, Min Ho Yang, In-taek Han, Ha Jin Kim, Naesung Lee, Jae-Hee Han, Tae Young Lee, Chong-Yun Park, J. M. Kim, Whikun Yi
Publikováno v:
Thin Solid Films. 409:126-132
Effects of growth parameters such as plasma intensity, flow rate, composition of reactant gases, growth temperature, and hole size on the selective area growth (SAG) of carbon nanotubes (CNTs) were investigated using the triode type field emission ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36826099d5ed0a19b48bebca09b5deaf
https://doi.org/10.1016/s0040-6090(02)00115-3
https://doi.org/10.1016/s0040-6090(02)00115-3
Publikováno v:
The British journal of surgery. 101(10)
Background The aim of this study was to identify clinical predictors of malignancy and surgical strategies for pancreatic solid pseudopapillary neoplasm (SPN) by analysis of surgical outcomes at a single institution. Methods All patients who underwen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::040702e280daac423b8b361bbd894e0b
https://pubmed.ncbi.nlm.nih.gov/25052300
https://pubmed.ncbi.nlm.nih.gov/25052300
Autor:
Ji-Beom Yoo, Ho-Chul Kim, Taewon Jung, T.Y. Lee, Chong-Yun Park, SeGi Yu, Jae-Hee Han, Sun Hong Choi, J.M. Kim, W.K. Yi, Naesung Lee
Publikováno v:
IVMC 2001. Proceedings of the 14th International Vacuum Microelectronics Conference (Cat. No.01TH8586).
We investigated effects of post treatment of carbon nanotubes (CNTs) on emission characteristics of CNTs. Annealing and plasma treatment of CNTs were carried in different ambient. Emission current from CNTs was increased by annealing in Ar atmosphere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95626e7eea0f40959034a04280d937f9
https://doi.org/10.1109/ivmc.2001.939640
https://doi.org/10.1109/ivmc.2001.939640