• Applied Microscopy
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• v.50
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• pp.28.1-28.6
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• 2020

Contamination on two-dimensional (2D) crystal surfaces poses serious limitations on fundamental studies and applications of 2D crystals. Surface residues induce uncontrolled doping and charge carrier scattering in 2D crystals, and trapped residues in mechanically assembled 2D vertical heterostructures often hinder coupling between stacked layers. Developing a process that can reduce the surface residues on 2D crystals is important. In this study, we explored the use of atomic force microscopy (AFM) to remove surface residues from 2D crystals. Using various transmission electron microscopy (TEM) investigations, we confirmed that surface residues on graphene samples can be effectively removed via contact-mode AFM scanning. The mechanical cleaning process dramatically increases the residue-free areas, where high-resolution imaging of graphene layers can be obtained. We believe that our mechanical cleaning process can be utilized to prepare high-quality 2D crystal samples with minimum surface residues.

• Korean Institute of Interior Design Journal
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• v.14 no.6 s.53
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• pp.270-279
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• 2005

As remodeling market is growing and peoples' concern on health and well-being is getting high, there is a need to apply environmentally friendly approach to remodeling an interior space. Therefore, the purpose of this study is to provide basic information on environmentally friendly remodeling process focused on the implementation of interior construction process. The method of this study was two-folds. First, previous researches were reviewed to drive general remodeling process, and then content of implementation of environmentally friendly remodeling process were added. Second, semi-structured interview was conducted to eight experts in interior design who were members of KOSID. The results of this study are as follows; (1) Applying environmentally friendly method to remodeling will be essential. Therefore, it is necessary to develop various types of environmentally friendly finish materials and methods and continuing attention should be paid. (2) For broad implementing an environmentally friendly application on remodeling, builders, interior designers, manufacturers, and clients should change their consciousness through education and publicity, (3) The results showed that using environmentally friendly materials was the most primary concern for the designers. However, there is a lack of information about contamination derived from materials when manufacturing and constructing and even wastes. Thus designers should be aware of using environmentally friendly verified materials regarding materials itself and its manufacturing process.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.384-387
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• 2008

We have studied the adsorption of contaminations on the MgO protective layer by Thermal Desorption Spectrometry (TDS). The result shows that the increase in exposure time, MgO thickness and humidity multiply the quantity of adsorbed contaminations. It is also found that the desorption activation energy and contamination quantity is decreased by the additional firing process of MgO layer under oxygen environment.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.715-717
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• 2006

$NiCl_2$ vapor was introduced into conventional furnace to conduct vapor-induced crystallization (VIC) process. We made the metal chloride atmosphere by sublimating the $NiCl_2$ compound. The $NiCl_2$ atmosphere enhanced the crystallization of amorphous silicon thin films. As the result, polycrystalline Si film with large grain size and low metal contamination has been obtained.

• Proceedings of the KIEE Conference
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• 1996.07c
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• pp.1492-1494
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• 1996

We have studied the generation, growth and behavior of chemical species and particles in silane PCVD. We included the plasma chemistry of silane, particle nucleation by homogeneous formation, acrosol dynamics and transport phenomena of chemical species and particles. The concentration profile of chemical species and particles were shown as a function of reactor length. The effects of process variables such as reactor pressure, total gas flow rate and electrical field strength on the behavior of chemical species and particles were analyzed.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.307-312
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• 2004

Contamination of industrial sites has happened by a variety compounds. Petroleum hydrocarbons, which are readily biodegradable, are reported principle contaminats in most industrial sites. Therefore, the use of biological processes will be a promising technology for remediation of industrial sites. This paper addresses the possible use of biological processes in remediation of contaminated industrial sites and discusses the background and main streams of the process. The paper also characterizes representative biological systems developed for application.

• Proceedings of the Korean Society of Toxicology Conference
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• 2001.10a
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• pp.13-14
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• 2001

Doenjang (Korean fermented soybean paste) is one of important fermented foods in Korea. Doenjang has been traditionally manufactured from meju which is fermented rectangular shape of crushed cooked soybeans. The main microorganisms involved for meju fermentation are Bacillus subtilis and molds such as Rizopus sp., Mucor sp. and Aspergillus sp. We have already reported that Doenjang is free from mycotoxin, especially, aflatoxin B$_1$contamination during the manufacturing process of the Deonjang.(omitted)

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2003.04a
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• pp.259-264
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• 2003

The fire protection system of Nuclear Power Plants(NPPs) is an integrated system that is applied multi-field technology. So, it needs synthetic design and analysis, that is, the plan of fire protection, fire compartment, fire detection, fire suppression, and success of safety shut down, etc. In case of a fire in NPPs, secure the safety of reactor and minimize the radioactivity contamination. For this purpose, perform the fire risk analysis and make up the deducted problem through the improvement of design or the change of operation process.

• Proceedings of the KSR Conference
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• 2003.10c
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• pp.484-490
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• 2003

Fundamental data was obtained to apply to the real contaminated soil of railroad by analyzing pollutant-elimination efficiency and process variables through electro-kinetic technology as well as by investigating Pollution sources of railroad soil contaminated by oil and pollution propensities.

• Clinical Endoscopy
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• v.55 no.2
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• pp.191-196
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• 2022

Unlike simple forward-viewing endoscopes such as gastroscope or colonoscope, duodenoscope houses much more complex design to fulfil its function. This design differences leave duodenoscopes more prone to contamination from inadequate disinfection process and potential dissemination of pathogens. Recent reports on dissemination of infection through the duodenoscope mandated an overhaul of duodenoscope utilization including development of a disposable duodenoscope. This article reviews the current state of disposable duodenoscope development, including reported early efficacy as well as its future direction and utilization.