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)
485 2021-06-11 14:30    Engineering sound waves and vibrations in multi-mode nanomechanical systems file
484 2019-09-27 16:00    0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
483 2018-03-16 14:30    산화물 다층박막에서의 다양한 물리현상 file
482 2018-03-16 14:30    산화물 다층박막에서의 다양한 물리현상 file
481 2016-12-8 16:00    Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator
480 2023-05-22 13:00    Design & Development of Electrochemical Biosensors for the Detection of T2DM Biomarkers
479 2017-03-02 16:00    “Progress in the comparison of ARPES to DMFT for d and f strongly correlated electron systems”
478 2019-12-03 16:00    Toward Quantum Materials with Correlated Oxides file
477 2016-04-01 16:15    Cotunneling drag effect in Coulomb-coupled quantum dots
476 2015-08-03 10:30    Axion Search
475 2016-11-04 13:30    Exotic phenomena at oxide LaAlO3/SrTiO3 hetero-interface and their applications
474 2018-10-19 10:00    Energy conversion processes during magnetic reconnection in a laboratory plasma file
473 2018-12-07 16:00    Novel probes of interacting electrons in 2D systems file
472 2019-09-27 14:30    Spin-charge conversion in topological insulators for spintronic applications file
471 2022-11-04 16:30    초세대 협업연구실 Quantum- & Nano-Photonics_Multifunctional neural probes with integrated nanophotonics file
470 2019-11-01 16:00    Electron transport through weak-bonded contact metal with low dimensional nano-material file
469 2024-06-12 13:30    Competition between superconductivity and density waves in spin-degenerate and spin-orbit-coupled Bernal bilayer graphene
468 2017-07-14 15:00    Chiral anomaly in disordered Weyl semimetals file
467 2018-07-27 13:30    Magnetic reversal of artificial spin ice file
466 2018-07-27 13:30    Magnetic reversal of artificial spin ice file