• 한국초전도학회:학술대회논문집
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• 2007.07a
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• pp.62-62
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• 2007

• 한국가스학회:학술대회논문집
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• 1999.09a
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• pp.100-107
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• 1999

• Bulletin of the Korean Chemical Society
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• v.35 no.1
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• pp.289-292
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• 2014

• Bulletin of the Korean Chemical Society
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• v.11 no.3
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• pp.231-235
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• 1990

The activation energy of dissociative adsorption of oxygen on polycrystalline nickel surface is calculated from adsorption isotherms obtained using X-ray photoelectron spectroscopy. Negative value of this activation energy (-5.9 kJ/mol) indicates that the adsorption takes place through an undissociated precursor state. An adsorption energy for this precursor state is calculated assuming the precursor state as a moleculary physisorbed state ($E_{ad}$ = -7.9 kJ/mol). Finally, an adsorption isotherm equation is derived as a function of the gas exposure, which agrees with the experimental isotherms reasonably good.

• Journal of the Korean Chemical Society
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• v.12 no.2
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• pp.38-38
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• 1968

The conductivity of polycrystalline NiO is measured in the temperature range of $200^{\circ}C\; to\; 800^{\circ}C$ under oxygen pressures from $1.52{\times}10^2\; mmHg\; to\; 10^{-4}$ mmHg. The plots of the log ${\sigma}$ vs 1/T at constant oxygen pressure are found to be linear and the activation energies obtained from the slopes of these plots show that the energies are greater under high oxygen pressure than under low pressure. The transition points are found from the curves. The dependence of the conductivity on the $O_2$ pressure, in the above temperature range, is to be regular but it does not obey the theoretical expression, i.e.${\sigma}σ = K_{ox}P^{1/6}.$ The activation energies are calculated from the curves at the various condition.

• Journal of the Korean Chemical Society
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• v.12 no.2
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• pp.39-43
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• 1968

The conductivity of polycrystalline NiO is measured in the temperature range of $200^{\circ}C\;to\;800^{\circ}C$ under oxygen pressures from $1.52{\times}10^2\;mmHg\;to\;10^{-4}$ mmHg. The plots of the log ${\sigma}$ vs 1/T at constant oxygen pressure are found to be linear and the activation energies obtained from the slopes of these plots show that the energies are greater under high oxygen pressure than under low pressure. The transition points are found from the curves. The dependence of the conductivity on the $O_2$ pressure, in the above temperature range, is to be regular but it does not obey the theoretical expression, i.e. ${\sigma}=K_{ox}P^{1/6}.$ The activation energies are calculated from the curves at the various condition.

• 한국신재생에너지학회:학술대회논문집
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• 2010.11a
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• pp.48.2-48.2
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• 2010

고효율 실리콘 태양전지 개발은 단파장의 광 응답 특성 개선을 위한 선택적 에미터 형성과 반사 손실 개선을 위한 미세 패턴 전극을 형성하는데 집중적인 연구가 진행되고 있다. 본 실험에서는 레이저 도핑된 선택적 에미터 위에 미세 패턴 Ni/Cu 도금 전극을 형성하였다. 니켈과 동 도금은 무전해 Light induced plating(LIP)으로 진행하였다. 니켈 도금 전극의 접착력 개선과 접촉저항 개선을 위해서 니켈 전극을 질소 분위기에서 열처리하여 니켈실리사이드(NiSi)를 형성하였다. 니켈 도금 두께와 니켈실리사이드 열처리 조건을 최적화하여 충실도 77.4%, 변환효율 18.5%를 달성하였다.

• Journal of Powder Materials
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• v.19 no.5
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• pp.338-342
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• 2012

A novel chemical method was evaluated to fabricate the ultrafine tungsten heavy alloy powders with bater-base solution made from the ammonium metatungstate (AMT), iron(II) chloride tetrahydrate ($FeCl_2{\cdot}4H_2O$), nickel(II) chloride hexahydrate ($NiCl_2{\cdot}6H_2O$) as source materials and the sodium tungstate dihydrate ($NaWO_4{\cdot}2H_2O$) as Cl-reductant. In the preparation of mixtures the amounts of the source components were chosen so as to obtain alloy of 93W-5Ni-2Fe composition(wt.%). The obtained powders were characterized by X-ray diffraction, XRF, field-emission scanning microscope (FESEM), and chemical composition was analyzed by EDX.

• Journal of Microbiology and Biotechnology
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• v.24 no.9
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• pp.1291-1299
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• 2014

Recently, multifunctional nanomaterials have been developed as nanotherapeutic agents for cellular imaging and targeted cancer treatment because of their ease of synthesis and low cytotoxicity. In this study, we developed a multifunctional, two-component nanorod consisting of gold (Au) and nickel (Ni) blocks that enables dual-fluorescence imaging and the targeted delivery of small interfering RNA (siRNA) to improve cancer treatment. Fluorescein isothiocyanate-labeled luteinizing hormone-releasing hormone (LHRH) peptides were attached to the surface of a Ni block via a histidine-tagged LHRH interaction to specifically bind to a breast cancer cell line, MCF-7. The Au block was modified with TAMRA-labeled thiolated siRNA in order to knock down the vascular endothelial growth factor protein to inhibit cancer growth. These two-component nanorods actively targeted and internalized into MCF-7 cells to induce apoptosis through RNA interference. This study demonstrates the feasibility of using two-component nanorods as a potential theranostic in breast cancer treatment, with capabilities in dual imaging and targeted gene delivery.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.805-806
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• 2011

Thermal conductivities of a Ni-Cr coating applied for the protection of a thrust chamber operating under the condition of high pressure and high temperature were measured. Results showed that the data used in heat transfer calculation has a 20~25% margin compared with data measured.