Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Woomin Lee"'
Autor:
Gyumin Lim, Kenneth David Kihm, Hong Goo Kim, Woorim Lee, Woomin Lee, Kyung Rok Pyun, Sosan Cheon, Phillip Lee, Jin Young Min, Seung Hwan Ko
Publikováno v:
Nanomaterials, Vol 8, Iss 7, p 557 (2018)
The grain size of CVD (Chemical Vapor Deposition) graphene was controlled by changing the precursor gas flow rates, operation temperature, and chamber pressure. Graphene of average grain sizes of 4.1 µm, 2.2 µm, and 0.5 µm was synthesized in high
Externí odkaz:
https://doaj.org/article/24385b3b06944b559cbf2786c4ed57aa
Autor:
Kyung Rok Pyun, Woomin Lee, Seonggeun Han, Seung Hwan Ko, Woorim Lee, Phillip Won, Gyumin Lim, Kenneth David Kihm
Publikováno v:
International Journal of Heat and Mass Transfer. 134:547-553
Spin-coated silver nanowires (AgNWs) on graphene show a significantly improved thermal conductance of the composite in comparison with pristine graphene with no nanowires. CVD-synthesized graphene is transferred onto an 8-nm thin TEM grid substrate,
Publikováno v:
JMST Advances. 1:191-195
The thermal conductivities of monolayer graphene with 4.1 μm grain size and multilayer graphene with 0.3 μm grain sizes are measured by optothermal Raman technique. The number of layers and average grain sizes of graphene are controlled by copper t
Autor:
Kyung Rok Pyun, Seung Hwan Ko, Woomin Lee, Kenneth David Kihm, Sinchul Yeom, Hong Goo Kim, Woorim Lee, Seungha Shin, Gyumin Lim, Sosan Cheon
Publikováno v:
Carbon. 138:98-107
The in-plane thermal conductivity ( k S i G ) of silicon-doped graphene (SiG) was greatly suppressed primarily due to increased phonon scattering associated with the large mass difference of Si from its host C atoms. For SiG as supported on an 8 nm-t
Autor:
Kyung Rok Pyun, Woomin Lee, Seung Hwan Ko, Hong Goo Kim, Woorim Lee, Seungha Shin, Gyumin Lim, Sosan Cheon, Kenneth David Kihm
Publikováno v:
Carbon. 125:39-48
Measuring the thermal conductivity kg of supported graphene is inherently complicated due to uncertainties associated with the heat dissipation into the substrate. We innovate the use of an ultra-thin 8-nm SiO2 substrate to alleviate these uncertaint
Publikováno v:
Carbon. 123:45-53
Redirection of energy carrier propagation by geometric confinement is studied through the analysis of in-plane and cross-plane thermal transport within various graphene nanomesh (GNM) configurations using molecular dynamics (MD) simulations. As the t
Autor:
Seung Hwan Ko, Hong Goo Kim, Woorim Lee, Gyumin Lim, Sosan Cheon, Phillip Lee, Jin Young Min, Kyung Rok Pyun, Woomin Lee, Kenneth David Kihm
Publikováno v:
Nanomaterials, Vol 8, Iss 7, p 557 (2018)
Nanomaterials
Volume 8
Issue 7
Nanomaterials
Volume 8
Issue 7
The grain size of CVD (Chemical Vapor Deposition) graphene was controlled by changing the precursor gas flow rates, operation temperature, and chamber pressure. Graphene of average grain sizes of 4.1 µ
m, 2.2 µ
m, and 0.5 µ
m, 2.2 µ
m, and 0.5 µ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c048d42db5dce54dc24ba5ae6907fa73
Autor:
Kyung Rok Pyun, Mi Kyung Han, Woomin Lee, Kenneth D. Kihm, Seung Hwan Ko, Hong Goo Kim, Woorim Lee, Sosan Cheon, Gyumin Lim, Sung Jin Kim
Publikováno v:
Advanced Materials Interfaces. :1900275
Autor:
Jae Sik Jin, Sosan Cheon, Hong Goo Kim, Woorim Lee, Kyung Rok Pyun, Tielin Li, Kenneth D. Kihm, Woomin Lee, Sung-Hoon Ahn, Seung Hwan Ko, Gyumin Lim, Hyun-Taek Lee
Publikováno v:
Applied Physics Letters. 114:051905
The detrimental effect of nanoscale hole defects on the in-plane thermal conductivity (k) was first examined for supported CVD graphene. A focused ion beam punctured equally spaced 50-nm diameter holes with different hole spacings (200, 400, and 800
Autor:
Jaesung Park, Woomin Lee, Woorim Lee, Sosan Cheon, Gyumin Lim, Chang-Hyuk Lee, Honggoo Kim, Kenneth D. Kihm
Publikováno v:
Experiments in Fluids. 57
Comparative wettability studies of graphene are conducted for two different nanofluids with opposite surface potentials of +53 mV (45-nm alumina nanoparticles) and −45 mV (28-nm silica nanoparticles), respectively. Aged graphene surface, which has