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Electrodeposition에 의해 성장온도와 시간을 달리하여 성장한 ZnO 나노구조의 특성
박영빈(Youngbin Park),남기웅(Giwoong Nam),박선희(Seonhee Park),문지윤(Jiyun Moon),김동완(Dongwan Kim),강해리(Hae Ri Kang),김하은(Haeun Kim),이욱빈(Wookbin Lee),임재영(Jae-Young Leem) 한국표면공학회 2014 한국표면공학회지 Vol.47 No.4
The electrodeposition of ZnO nanorods was performed on ITO glass. The optimization of two process parameters (solution temperature and growth time) has been studied in order to control the orientation, morphology, density, and growth rate of ZnO nanorods. The structural and optical properties of ZnO nanorods were systematically investigated by using field-emission scanning electron microscopy, X-ray diffractometer, and photoluminescence. Commonly, the results of the structural property show that hexagonal ZnO nanorods with wurtzite crystal structures have a c-axis orientation, and higher intensity for the ZnO (002) diffraction peaks. Furthermore, the nanorods length increased with increasing both the solution temperature and the growth time. The results of the optical property show a strong UV (3.28 eV) peaks and a weak visible (1.9~2.4 eV) bands, the intensity of UV peaks was increased with increasing both the solution temperature and the growth time. Especially, the UV peak for growth of nanorods at 75oC blue-shift than different temperatures.
전착법으로 성장된 산화아연 나노막대의 특성에 전구체 농도 및 전착 전류가 미치는 효과
박영빈(Youngbin Park),남기웅(Giwoong Nam),박선희(Seonhee Park),문지윤(Jiyun Moon),김동완(Dongwan Kim),강해리(Hae Ri Kang),김하은(Haeun Kim),이욱빈(Wookbin Lee),임재영(Jae-Young Leem) 한국표면공학회 2014 한국표면공학회지 Vol.47 No.4
ZnO nanorods have been deposited on ITO glass by electrodeposition method. The optimization of two process parameters (precursor concentration and current) has been studied in order to control the orientation, morphology, and optical property of the ZnO nanorods. The structural and optical properties of ZnO nanorods were systematically investigated by using field-emission scanning electron microscopy, X-ray diffractometer, and photoluminescence. Commonly, the results show that ZnO nanorods with a hexagonal form and wurtzite crystal structure have a c-axis orientation and higher intensity for the ZnO (002) diffraction peaks. Both high precursor concentration and high electrodeposition current cause the increase in nanorods diameter and coverage ratio. ZnO nanorods show a strong UV (3.28 eV) and a weak visible (1.9 ~ 2.4 eV) bands.
퍼콜레이션 문턱값 예측을 위한 그래핀 고분자 나노복합재의 모델링
김명수(Myungsoo Kim),박영빈(Youngbin Park),정호순(Hosoon Jung) 한국자동차공학회 2011 한국자동차공학회 지부 학술대회 논문집 Vol.2011 No.10-2
Extraordinary physical properties of graphene sheets enable them to be an excellent reinforcement in polymer matrix. This research explores modeling of graphene polymer nanocomposites for prediction of electrical percolation threshold. Graphene sheets were assumed to be square in the simulation. To obtain percolation probability, a percolation model including site and bond and Monte Carlo technique were employed. The results of the simulation showed transition, from nonconducting material to conducting material, and increase of electrical conductivity with the increase of graphene loading in a polymer.
원종순(Jongsoon Won),박영빈(Youngbin Park),서일홍(Il Hong Suh) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.6
In this study, we aim at grasping a single target object in a clutter environment using a robotic arm. For this purpose, we add a primitive motion termed “scattering” to a set of manipulator capabilities. In particular, a robot aims to grasp an object by first executing a simple scattering motion to scatter objects near the target object that might be blocking direcr access to it. The robot then reaches out its arm and finally closes its fingers to grasp the target object. Through experiments, we investigate the improvements in success rate with robotic grasping with the inclusion of scattering based on a relatively simple machine learning algorithm as well as well-known visual segmentation algorithms.