• Mass Spectrometry Letters
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• v.6 no.4
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• pp.85-90
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• 2015

This article reviews recent analytical techniques using inductively coupled plasma-mass spectrometry (ICP-MS) immunoassay for clinical and bio analysis. We classified the techniques into two categories, direct and indirect analysis, which depend upon a guideline of whether tagging materials are used or not. Direct analysis is well known, and generally used in conjunction with various other techniques, such as laser ablation, chromatographic separations, etc. Recently, indirect analysis using tagging elements has intensively been discussed because of its importance in future applications to bio and clinical analysis, including environmental and food industries. The method has shown advantages of multiplex detection, excellent sensitivity, and short analysis time owing to signal amplification and magnetic separation. Now, it expands the application field from small biomolecules to large cells.

• Journal of Welding and Joining
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• v.10 no.4
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• pp.39-43
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• 1992

용접은 자동차, 중공업, 조선, 건설, 항공 등 주요 기간산업의 기반기술로서, 금속가공분야 가운데 특히 접합부문에 특별한 의미를 내포하고 있다. 그러나 기반기술로서의 중요성도 불구하고 국 내산업전반에서의 용접은 비교적 낙후된 모습을 보이고 있는 것이 부인할 수 없는 실정이다. 용접이란, 금속가공의 일개공정을 의미하는 용어로 간단히 정의될 수 있지만 용접공정이 원만히, 성공적으로 수행되기 위한 준비되고 연구되어야 할 분야는 매우 복잡하고 다양한 양상을 띄고 있는데 우선, 모재와 용가재를 용해하기 위한 열원으로서는 전기에너지, 화학연소 에너지, LASER, 가속전자, PLASMA가 응용되고 있으며 그 에너지를 유효하게 용접에 이용하기 위한 주변장치로서는 TORCH, JIG, 각종 전자적 SENSOR각 활용되고 있다. 또한, 모재의 재질에 따른 용접재료와 소모성자재의 선택이 부수적으로 따르게 되어 각각의 분야에는 그 특성에 준 하는 학문적 이론이 광범위하게 적용되고 있다. 각종 구조물 제작이 용접의 최종적인 목적이라고 할 때, 제작에 따른 재료와 모재형상, 그리고 각종 기능적 요구에 부합하기 위한 열원, 재료, 용접방법, 검사방법등의 선택은 종합적인 학문적 이론과 실제적 응용이 뒷받침 돼야 함을 전제 로써, 본고에는 용접전반의 문제중, 전기용접기기 및 용접관련 자동화 설비의 현주소 파악과 문 제의 접근측면에서만 간단히 기술하고자 한다.

• Journal of the Optical Society of Korea
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• v.16 no.1
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• pp.80-84
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• 2012

A high reflectance mirror, which has very low absorption and scattering loss, was coated onto a crystalline substrate by ion beam sputtering and then annealed at $450^{\circ}C$. We carefully selected the mirror coating material, and designed the high reflectance mirror, in order to avoid UV degradation which comes from the He-Ne plasma. We measured the surface roughness of the Zerodur substrate using phase shift interferometry and atomic force microscopy, and compared it with the TIS scattering of the mirror. The cavity ring-down method was used to measure the absorption of the mirror, and the thin film structure was correlated to its results. We also compared the optical properties of coated mirrors before and after annealing.

• Bulletin of the Korean Chemical Society
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• v.34 no.12
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• pp.3899-3902
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• 2013

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2002.07a
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• pp.236-239
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• 2002

The electron-atom collision studies has been essentially use\ulcorner for testing and developing suitable theories of the scattering and collision processes, and for providing a tool for obtaining detailed information on the structure of the target atoms and molecules and final collision products. And, the development of that has also been strongly motivated by the need for electron collision data in such fields as laser physic and development, astrophysics, plasma devices, upper atmospheric processes and radiation physics. Therefore, we explains the concept and the principle of determination of the electron collision cross sections for atoms and molecules by using the present electron swarm method.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2008.11a
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• pp.89-90
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• 2008

본 연구에서는 PECVD(Plasma Enhanced CVD) 에서 사용하는 유해 가스인 $SiH_4$ 대신에 유기 사일렌 반응 물질인 TEOS(Tetraethyl Orthosilicate, Si$(OC_2H_5)_4)$를 이용하여 상압 화학 기상 증착법 (Atmospheric Pressure CVD, APCVD)으로 실리콘 산화막을 증착하고 박막의 조성과 특성 및 화학적, 전기적 특성들을 살펴보았다. TEOS 반응원료를 이용한 CVD 공정에서 공정 온도를 낮추기 위한 방법으로 강력한 산화제인 오존을 이용하여 공정온도를 $400^{\circ}C$이하로 낮췄으며, 유리기판 상의 ELA(Excimer Laser Annealing)처리된 다결정 실리콘 기판에 트랜지스터 소자를 제작하고, 게이트 절연막으로의 전기적 특성을 살펴보았다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2008.11a
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• pp.15-16
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• 2008

We have grown N-doped ZnO thin films on sapphire substrate by employing dielectric barrier discharge in pulsed laser deposition (DBD-PLD). DBD guarantees an effective way for massive in-situ generation of N-plasma under the conventional PLD process condition. Low-temperature photoluminescence spectra of the N-doped ZnO film provided near band-edge emission after thermal annealing process. The emission peak was resolved by Gaussian fitting and showed a dominant acceptor-bound exciton peak ($A^0X$) that indicated the successful p-type doping of ZnO with N.

• The Bulletin of The Korean Astronomical Society
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• v.42 no.2
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• pp.65.4-65.4
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• 2017

The laboratory astrophysics is a new emerging field of basic sciences, and has tremendous discovery potentials. The laboratory astrophysics investigates the basic physical phenomena in the astrophysical objects in controlled and reproducible manners, which has become possible only recently due to the newly-established intense photon and ion beam facilities worldwide. In this presentation, we will introduce several promising ideas for laboratory astrophysics programs that might be readily incorporated in the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL). For example, precise spectroscopic measurements using Electron Beam Ion Trap (EBIT) and intense X-ray photons from the PAL-XFEL can be performed to explore the fundamental processes in high energy X-ray phenomena in the visible universe. Besides, in many violent astrophysical events, the energy density of matter becomes so high that the traditional plasma physics description becomes inapplicable. Generation of such high-energy density states can be also be achieved by using the intense photon beams available from the PAL-XFEL.

• Proceedings of the Optical Society of Korea Conference
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• 2000.02a
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• pp.224-225
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• 2000

Transparent and hard materials such as sapphire are used for many industrial applications as optical windows, hard materials on mechanical contact against abrasion, and substrate materials for opto-electronic semiconductor devices such as blue LED and blue LD etc. The materials should be cut along the proper shapes possible to be used for each application. In case of blue LED, the blue LED wafer should be cut to thousands of blue LED pieces at the final stage of the manufacturing process. The process of cutting the wafer is usually divided into two steps. The wafer is scribed along the proper shapes in the first step. It is inserted between transparent flexible sheets for easy handling. And then, it is broken and split in the next step. Harder materials such as diamonds are usually used to scribe the wafer, while it has a problem of low depth of scribing and abrasion of the harder material itself. The low depth of scribing can induce failure in breaking the wafer along the scribed line. It was also known that the expensive diamond tip should be replaced frequently for the abrasion. (omitted)

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 1999.11a
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• pp.11-16
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• 1999

Discharge characteristics research for high voltage and large current electric machinery design, the development of ozonizer with high yield and efficiency for environment improvement, generation of plasma & laser and EMI EMC are research fields of Enersy & Environment Electromagnetic Laboratory(EEEL) in the school of electrical & electronic engineering of Yeungnam University. On this paper, we would like to introduce the discharge and ozone generation characteristics of ozonizers designed and manufactured by EEEL. After starting research for fluid gas discharge characteristics early in the 1980's, high voltage nozzle(HVN) type ozonizer, neon lamp(Nelamp) type ozonizer, ozone lamp(Olamp) type ozonizer and multi-discharge type ozonizer(MDO) have been investigated since 1990.