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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공지 | 2019/09/18 - 12/5 | Seminar Room #1323 | Prof. David Schuster and etc. | Fall 2019: Physics Seminar Serises |
공지 | 2019/09/02 - 12/09 | Seminar Room 1501 | 이호성 박사 (한국표준과학연구원) and etc. | Fall 2019: Physics Colloquium |
156 | Nov. 1 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. YoungWook Kim |
Squeezing the best out of 2D materials
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155 | Sep. 26 (Tue.), 11AM | #1323 (E6-2. 1st fl.) | Dr. Yukiaki Ishida / ISSP, University of Tokyo | Time-resolved ARPES study of Dirac and topological materials |
154 | Apr. 08 (Fri.), 13:30 PM | E6-2. 1st fl. #1501 | Dr. Yunkyu Bang, Chonnam National Univ. | Theoretical Overview of Iron-based superconductors and its future |
153 | June 28 (Fri.), 13:30 PM | #1323, E6-2 | Dr. Yusuke Kozuka |
Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures
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152 | Oct. 27th(Thu) 4PM | #1323(E6-2) | Dr. 이 강 희, KAIST, Mechnical Engineering | Terahertz Metal Optics |
151 | Nov. 18th (Fri) 10:30 a.m. | #5318(5th fl.) | Dr. 최 순 원, Havard University | Non-equilibrium many-body spin dynamics in diamond |
150 | December 27(Fri.), 15:00 | E6-2,#5318 | Han Gyeol Suh |
The superconducting order parameter puzzle of Sr2RuO4
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149 | Dec 27 (Fri), 3:00 PM | #5318, E6-2 | Han Gyeol Suh |
The superconducting order parameter puzzle of Sr2RuO4
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148 | September 26 (Thu.), 16:00 PM | #1323, E6-2 | Han Seb Moon |
Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble
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147 | January 17 (Fri), 4:00 PM | #1323, E6-2 | Hiroki Ikegami |
Symmetry Breaking and Topology in Superfluid 3He
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146 | August 27 (Tue.), 4:00PM | Rm. 1323, E6 | Hiroshi Eisaki |
Critical current properties of Fe-based superconductors
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145 | August. 1st (Thu), 14:00 | E6 Room(#1323) | Hyeok Yoon |
Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy
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144 | Dec. 11 (Fri.), 04:00 PM | online | Hyobin Yoo(Sogang Univ.) | Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials |
143 | Jun. 16 (Thu) 4PM | #1323(E6-2, 1st fl.) | Hyochul Kim, Samsung Advanced Institute of Technology | Quantum information processing using quantum dots and photonic crystal cavities |
142 | June 27 (Thu), 2:00 PM | #2502, E6-2 | Hyun-Yong Lee |
Gapless Kitaev Spin Liquid to Loop and String Gases
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141 | May. 8th (Wed), 16:00 | E6 Room(#1323) | Jieun Lee |
Imaging valley dependent electron transport in 2D semiconductors
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140 | May. 8th (Wed), 16:00 | E6 Room(#1323) | Jieun Lee |
Imaging valley dependent electron transport in 2D semiconductors
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139 | 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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138 | Sep10(Tue), 15:00 | #2502, E6-2 | Jun Ho Son |
(2+1) D Duality Web from 3D Euclidean Lattice
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137 | July 21 - August 2 | E6-2,# 5318 | Junmou Chen/Thomas Flacke/Kaoru Hagiwara/Junichi Kanzaki/Chris Kelso/Jeong Han Kim/Kyoungchul Kong/Gabriel Lee/Hye-Sung Lee/Ian Lewis |
Challenges and Opportunities in Theoretical Particle Physics 2019
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