장소 | #1323, E6-2 |
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일시 | May 29 (Tue.), 04:00 PM |
연사 | Prof. Jae-Won Jang |
Physics Seminar Series
“Investigation on metal nanostructure/semiconductor junction and its applications”
Dept. of Physics, Pukyong National University
Abstract:
Hybrid nanostructures have attracted attention due to many novel properties that are lacking in any one material. Among hybrid nanostructures, semiconductor with metal nanomaterials have been more exploited because metals and semiconductors have different properties that, in combination, result in unique electrical and optical properties. Localized surface plasmon resonance (LSPR), which is one of the novel properties of metal nanoparticles (NPs), has been used as a good strategy for increasing the opto-electric performance in semiconductors. In this presentation, improvement of the opto-electronic properties of non-single crystallized nanowire (NW) devices with space charges generated by LSPR is demonstrated. The photocurrent and spectral response of single polypyrrole (PPy) NW devices are increased by electrostatically attached Ag nanoparticles (NPs). In particular, it is also proved the space charge generation by LSPR of Ag NPs by means of characterizing current–voltage (J–V) dependence and finite-differential time domain (FDTD) simulation on the NW devices. Moreover, semiconductor type dependent role of metal NP in metal NPs decorated semiconductor NW is demonstrated by using light irradiated Kevin probe force microscopy. As an another example of applications based on metal nanostructures and semiconductor junction, it is also demonstrated that a non-traditional metal–semiconductor transition governed by two-layer conduction is possible by tuning the conducting channel of one layer of the two-layer conduction system. By means of the electroless deposition method Au nanofeatures (AuNFs) on p-type silicon (p-Si) is produced as the two-layer conduction system, controlling AuNF coverage (Au%) below and above the percolation threshold (pc). Even when the AuNF coverage percentage is larger than pc, the resistivities of the AuNFs on p-Si show unconventional metal-semiconductor transition as the temperature increases.
Department of Physics, KAIST
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번호 | 일시 | 장소 | 연사 | 제목 |
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160 | Dec. 8(Thu) 4p.m. | #1323(E6-2. 1st fl.) | Dr. Jinhyoung Lee, Hanyang University | Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator |
159 | Dec. 7 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Joon Ho Jang |
Novel probes of interacting electrons in 2D systems
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158 | Dec. 7 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Gyung Min Choi |
Spin generation from heat and light in metals
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157 | Dec. 3 (Fri.), 04:00 PM | Zoom webinar | Dr. Hyejin Jang (Seoul National University) |
Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer
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156 | Dec. 3 (Fri.), 02:30 PM | Zoom webinar | Dr. Soong-Geun Je(Chonnam National University) |
Topological Spin Textures: Skyrmions and Beyond
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155 | DEC. 27 (Thu), 04:00 PM | E6-2. 1st fl. #1323 | Prof. Na Young Kim |
Quantum Innovation (QuIN) Laboratory
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154 | Dec. 26 (Wed.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Isaac H. Kim |
Brane-like defect in 3D toric code
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153 | DEC. 26 (Wed), 04:00 PM | E6-1. 3rd fl. #3434 | Y. Kim, A. Go, K. Hwang and E.-G. Moon |
Informal Workshop on Topology and Correlation
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152 | DEC. 16~18 (Sun~Tue) | E6-2. 1st fl. #1323 | Prof. Keisuke Totsuka |
Lectures on 2d Conformal Field Theory
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151 | Dec. 15 (Fri.), 9:20 AM | E6-2, Lecture Room #1323 | Prof. Jhinhwan Lee 외 9명 |
Workshop on Magnetism in Unconventional Superconductors 개최
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150 | Dec. 13-14(Wed.-Thu.) 13:30 PM | 자연과학동 대형강의실 (1501호) | 장기주 교수 외 9명 |
KAIST-KIAS Joint Workshop in Theoretical Sciences 개최
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149 | Dec. 12th (Mon) | 1:30p.m. #1323(E6-2. 1st fl.) | Dongjoon Song , AIST | “Possible symmetry in the phase diagrams of electron- & hole-doped cuprate high-Tc superconductors” |
148 | DEC. 11 (Tue), 04:00 PM | E6-2. 1st fl. #1323 | Prof. Hiroshi Shinaoka |
Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations
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147 | Dec. 11 (Fri.), 04:00 PM | online | Hyobin Yoo(Sogang Univ.) | Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials |
146 | Dec. 11 (Fri.), 02:30 PM | online | Myung Hwa Jung(Sogang Univ.) | Antisymmetric interlayer exchange coupling in magnetic multilayers |
145 | Dec 27 (Fri), 3:00 PM | #5318, E6-2 | Han Gyeol Suh |
The superconducting order parameter puzzle of Sr2RuO4
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144 | August. 6th (TUE), 14:00 | E6 Room(#1323) | Kanghyun Chu |
Visualization of in-plane piezoresponse vector fields
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143 | August. 1st (Thu), 14:00 | E6 Room(#1323) | Hyeok Yoon |
Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy
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142 | August. 16th (Fri), 14:00 | E6 Room(#1323) | Jinxing Zhang |
Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides
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141 | August. 14th (Wed.), 4:00PM, | Rm. 1323, E6 | Prof. Nicolas Treps |
Quantum Optics, at the heart of quantum metrology and quantum information
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