visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-05-29 16:00 
연사  
장소 #1323, E6-2 

Physics Seminar Series

 

 

Investigation on metal nanostructure/semiconductor junction and its applications

 

Prof. Jae-Won Jang

Dept. of Physics, Pukyong National University

 

May 29 (Tue.), 04:00 PM

#1323, E6-2

 

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

 

5b07a2c83fc9688fef6c438c.png

 

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
545 2015-09-15 16:00    Physics Colloquium : 2014 Fall file
544 2022-03-14 16:00    Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
543 2023-04-27 16:00    (광학분야 세미나)On-chip spectrometers based on CMOS image sensors
542 2021-05-27 16:00    찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
541 2016-03-11 13:30    Physics Seminar Serises : 2016 Spring file
540 2022-11-03 16:00    (광학분야 세미나) Single-photon emission from low-dimensional materials
539 2015-09-07 16:00    Physics Colloquium : 2015 Fall file
538 2025-03-28 11:00  명노준 교수 (조선대)  Quantum Transport in Strained-Engineered Graphene: Mesoscopic Perspective of Tunable Quantum Information Devices file
537 2025-05-15 16:00  노찬 박사(KAIST)  Generation of multimode Gaussian quantum states and their applications for quantum computing file
536 2022-04-11 16:00    Emergence of Statistical Mechanics in Quantum Systems
535 2022-04-04- 16:00    New paradigms in Quantum Field Theory
534 2022-05-09 16:00    Searching for new electronic properties in correlated material flatland
533 2022-05-23 16:00    Novel electronic transport in topological van der Waals magnets
532 2011-09-03 16:00    Physics Colloquium : 2011 Fall file
531 2022-10-13 16:00    (광학분야 세미나) Ultrafast Optics for Ultra-Precision Metrology and Realization of Flexible/Stretchable Laser-Induced-Graphene Electronics
530 2020-11-12 16:00    2020 가을학기 광학분야 특별세미나
529 2022-10-07 11:00    [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer file
528 2022-10-28 11:00    [Update 세미나영상] (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates file
527 2017-10-10 16:00    Discovery of New 2D Materials with Diverse Physical Properties
526 2023-04-06 16:00    (광학분야 세미나)Nanophotonics-based approaches to explore Berry physics