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Fe2O3 첨가에 따른 AC PDP 보호막용 MgO 박막의 광학적.전기적 특성
김창일, 정영훈, 이영진, 백종후, 최은하, 정석, 김정석, Kim. Chang-II, Jeong. Young-Hun, Lee. Young-Jin, Paik. Jong-Hoo, choi. Eun-Ha, Jung. Seok, Kim. Jeong-Seok 한국전기전자재료학회 전기전자재료학회논문지 6 Pages
한국전기전자재료학회 전기전자재료학회논문지 2009, Vol.22 No.9 760-765 (6 pages)
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Gd2O3 첨가에 따른 AC PDP 보호막용 MgO 박막의 광학적.전기적 특성
김창일, 임은경, 박용준, 이영진, 백종후, 최은하, 정석, 김정석, Kim. Chang-Il, Lim. Eun-Kyeong, Park. Young-Jun, Lee. Young-Jin, Paik. Jong-Hoo, Choi. Eun-Ha, Juang. S 한국전기전자재료학회 전기전자재료학회논문지 6 Pages
한국전기전자재료학회 전기전자재료학회논문지 2007, Vol.20 No.7 620-625 (6 pages)
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ZrO2 첨가에 따른 AC PDP 보호막용 MgO 박막의 광학적 전기적 특성
김창일, 정영훈, 이영진, 백종후, 최은하, 정석, 김정석, Kim. Chang-Il, Jung. Young-Hun, Lee. Young-Jin, Paik. Jong-Hoo, Choi. Eun-Ha, Jung. Seok, Kim. Jeong-Seok 한국재료학회 한국재료학회지 5 Pages
한국재료학회 한국재료학회지 2008, Vol.18 No.8 422-426 (5 pages)
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2단계 스퍼터링으로 형성시킨 강유전 박막의 누설전류 개선
마재평, 신용인, Mah. Jae-Pyung, Shin. Yong-In 한국마이크로전자및패키징학회 마이크로전자 및 패키징 학회지 6 Pages
한국마이크로전자및패키징학회 마이크로전자 및 패키징 학회지 2006, Vol.13 No.1 17-22 (6 pages)
2단계 스퍼터링으로 강유전 PZT 박막을 형성시켜 유전특성과 전도기구를 조사하였다. 또한 PZT 박막 내의 carrier를 보상해주기위해 도너 불순물을 도핑하였다. 2단계 스퍼터링으로 상온층 두에를 조절하여 누설전류를 $10^{-7}A/cm^2$ order까지 줄일 수 있었다. 전도기구가 bulk-limited의 하나임을 확인하였고 따라서 적정한 도너 불순물을 채택하였다. 도너 불순물을 도핑한 경우 2단계 스퍼터링한 PZT 박막의 누설전류 특성은 $10^{-8}A/cm^2$ order까지 개선되었다. -
Study on properties of eco-friendly reduction agents for the reduced graphene oxide method
Young-il Na, Young Il Song, Sun Woo Kim, Su-Jeong Suh 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 1 1-9 (9 pages)
We studied the basic properties and fabrication of reduced graphene oxide (rGO) prepared using eco-friendly reduction agents in the graphene solution process. Hydrazine is generally used to reduce graphene oxide (GO), which results in polluting emissions as well as fixed nitrogen functional groups on different defects in the graphene sheets. To replace hydrazine, we developed eco-friendly reduction agents with similar or better reducing properties, and selected of them for further analysis. In... -
Facile fabrication of electrospun polyacrylonitrile/ poly(vinylidene fluoride)-based carbon nanofibers for supercapacitor electrodes
Hyo In Lee, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 12 79-83 (5 pages)
Energy storage devices and renewable energy sources are some of the most interesting alternatives being developed to solve the energy crisis [1,2]. At the same time, energy harvesting and storage devices are among the technologies with the highest potential to efficiently satisfy the energy requirements of compact electronic devices [3]. Among various energy storage devices, supercapacitors are the among the most intensely researched because of their high power density, long cycle retention, and... -
A facile green reduction of graphene oxide using Annona squamosa leaf extract
Basavaiah Chandu, Venkata Sai Sriram Mosali, Bhanu Mullamuri, Hari Babu Bollikolla 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 9 74-80 (7 pages)
A highly facile and eco-friendly green synthesis of Annona squamosa (custard apple) leaf extract reduced graphene oxide (CRG) nanosheets was achieved by the reduction of graphene oxide (GO). The as-prepared CRG was characterized with X-ray diffraction (XRD), transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FT-IR), ultraviolet-visible (UV-Vis), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopic techniques. Removal of oxygen containing moieties from the... -
Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides
Mi-Seon Park, Sangmin Lee, Young-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 1 1-7 (7 pages)
The effects of ammonia-treated graphene oxide (GO) on composites based on epoxy resin were investigated. Ammonia solutions of different concentrations (14?28%) were used to modify GO. Nitrogen functional groups were introduced on the GO surfaces without significant structural changes. The ammonia-treated GO-based epoxy composites exhibited interesting changes in their mechanical properties related to the presence of nitrogen functional groups, particularly amine (C-NH2) groups on the GO... -
Adsorption capability of activated carbon synthesized from coconut shell
Md Shariful Islam, Bee Chin Ang, Samira Gharehkhani, Amalina Binti, Muhammad Afifi 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 1 1-9 (9 pages)
Activated carbon was synthesized from coconut shells. The Brunauer, Emmett and Teller surface area of the synthesized activated carbon was found to be 1640 m2/g with a pore volume of 1.032 cm3/g. The average pore diameter of the activated carbon was found to be 2.52 nm. By applying the size-strain plot method to the X-ray diffraction data, the crystallite size and the crystal strain was determined to be 42.46 nm and 0.000489897, respectively, which indicate a perfect crystallite structure. The... -
Study on urea precursor effect on the electroactivities of nitrogen-doped graphene nanosheets electrodes for lithium cells
Ki-Yong Kim, Yongju Jung, Seok Kim 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 5 40-46 (7 pages)
Nitrogen-atom doped graphene oxide was considered to prevent the dissolution of polysulfide and to guarantee the enhanced redox reaction of sulfur for good cycle performance of lithium sulfur cells. In this study, we used urea as a nitrogen source due to its low cost and easy preparation. To find the optimum urea content, we tested three different ratios of urea to graphene oxide. The morphology of the composites was examined by field emission scanning electron microscope. Functional groups and...
