Jooheon Kim

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UNLABELLED Tin selenide (SnSe) nanosheets (NSs) are prepared by hydrothermal lithium-intercalation and a subsequent exfoliation process from a SnSe ingot. Conducting polymer poly(3,4-ethylenedioxythiohene):poly(styrenesulfonate) ( PEDOT PSS)-based thermoelectric composites are fabricated with varying SnSe NSs content, and the thermoelectric properties of(More)
Graphene-MnO2 composites are reduced from GO-MnO2 using various concentrations of hydrazine hydrate with a fixed reduction time to optimize the hydrazine concentration to obtain excellent electrochemical performance. Changes in the oxygen-containing functional groups are observed as the concentration of hydrazine is varied. These changes affect the(More)
Amino-functionalized nano-aluminum nitride (nano-AlN) particles were doped onto the surfaces of chlorinated multi-walled carbon nanotubes (MWCNTs) to act as fillers in thermally conducting composites. These synthesized materials were embedded in epoxy resin. Then, the untreated micro-aluminum nitride (micro-AlN) particles were added to this resin, whereby(More)
BACKGROUND There is a subjective disagreement about nuclear chromatin in the field of pathology. Objective values of red, green, and blue (RGB) light intensities for nuclear chromatin can be obtained through a quantitative analysis using digital images. METHODS We examined 10 cases of well differentiated neuroendocrine tumors of the rectum, small cell(More)
Silicon carbide microsphere/birnessite-type MnOx (SiC/B-MnOx) composites were prepared by removal of a SiO2 layer with redox deposition of birnessite-type MnOx for supercapacitor electrode materials. The characterization studies showed that the birnessite-type MnOx in the composite was homogeneously deposited on the SiC surface. The capacitive properties of(More)
In order to achieve high energy and power densities, a high-voltage asymmetric electrochemical supercapacitor has been developed, with activated carbon (AC) as the negative electrode and a silicon carbide-MnO2 nanoneedle (SiC-N-MnO2) composite as the positive electrode. A neutral aqueous Na2SO4 solution was used as the electrolyte. SiC-N-MnO2 was prepared(More)
0026-2714/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.microrel.2010.11.001 ⇑ Corresponding author. Address: Chung-Ang Uni Dongjak-gu, Seoul 156-756, Republic of Korea. Tel.: +8 3495. E-mail address: jooheonkim@cau.ac.kr (J. Kim). The mechanical and wetting properties of the diglycidyl ethers of bisphenol A (DGEBA) and bisphenol F (DGEBF) with(More)
Composites of micro- and mesoporous SiC flakes (SiCF) and ferroferric oxide (Fe3O4), SiCF/Fe3O4, were prepared via the chemical deposition of Fe3O4 on SiCF by the chemical reduction of an Fe precursor. The SiCF/Fe3O4 electrodes were fabricated at different Fe3O4 feeding ratios to determine the optimal Fe3O4 content that can maintain a high total surface(More)