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- Publications
- Influence
3ω method for specific heat and thermal conductivity measurements
We present a 3ω method for simultaneously measuring the specific heat and thermal conductivity of a rod- or filament-like specimen using a way similar to a four-probe resistance measurement. The… Expand
Secondary electron emission yields from MgO deposited on carbon nanotubes
Enormously high secondary electron emission yields under electric field are observed from MgO deposited on carbon nanotubes. The yields reach a value as high as 15 000 and are strongly dependent upon… Expand
Secondary electron emission from magnesium oxide on multiwalled carbon nanotubes
We have investigated effects of electric fields on the yield of secondary electron emission (SEE) from the primary electron bombardment on magnesium oxide (MgO) covering vertically grown multiwalled… Expand
Double layer-coated carbon nanotubes: Field emission and secondary-electron emission properties under presence of intense electric field
The authors measured the field emission (FE) and secondary-electron emission (SEE) of carbon nanotubes (CNTs) after coating with wide-band-gap materials, such as MgO and CsI. The FE was increased… Expand
Enhanced charge collection and reduced recombination of CdS∕TiO2 quantum-dots sensitized solar cells in the presence of single-walled carbon nanotubes
This paper reports the modification of CdS∕TiO2 quantum-dot sensitized solar cells by using single-walled carbon nanotubes (SWCNTs) on indium-doped tin oxide (ITO) electrodes. The presence of the… Expand
Effect of single-walled carbon nanotube in PbS/TiO2 quantum dots-sensitized solar cells
- Wonjoo Lee, J. Lee, Sun Ki Min, Taehee Park, W. Yi, S. Han
- Materials Science
- 29 August 2008
Abstract Single-walled carbon nanotubes (SWNTs) layers formed on indium-doped tin oxide (ITO) electrodes for enhanced photoconversion efficiency of PbS/TiO 2 quantum dots (Q dots)-sensitized… Expand
Planar gradient coil design by scaling the spatial frequencies of minimum‐inductance current density
Gradient coil inductance has been remarkably reduced by the minimum‐inductance design technique, which minimizes the magnetic energy stored by the gradient coil. The planar gradient coil designed by… Expand
Conducting Properties of Polypyrrole Coated Imogolite
- Y. Lee, Bumjoong Kim, W. Yi, A. Takahara, D. Sohn
- Materials Science
- 20 November 2006
Imogolite which has chemical composition, , was synthesized with orthosilicate acid and aluminium chloride at low pH solution. It has extremely large aspect ratio with an external diameter of 2nm and… Expand
Effects of growth parameters on the selective area growth of carbon nanotubes
- Jae-Hee Han, S. H. Choi, +10 authors J. Kim
- Chemistry
- 22 April 2002
Abstract 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… Expand
Large scale synthesis and enhanced field emission properties from hybrid CuO/ZnO nanorod.
- J. Lee, Eunkyung Park, Taehee Park, Jongtaek Lee, Myungmo Sung, W. Yi
- Materials Science, Medicine
- Journal of nanoscience and nanotechnology
- 1 August 2011
Upper-directionally grown nanorods were synthesized on a large scale by a simple method of direct heating of Cu foil in air. Hybrid CuO/ZnO nanorods were fabricated by ZnO thin film coating using… Expand