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)
386 2023-09-18 16:00    [CAPP Seminar] Searching for axions in quantum vacuum birefringence file
385 2022-11-24 16:00    Probing fundamental physics by mapping the mm and sub-mm sky
384 2016-10-07 13:30    “Symmetry and topology in transition metal dichalcogenide?”
383 2022-10-26 10:00    Replica Higher-Order Topology of Hofstadter Butterflies in Twisted Bilayer Graphene
382 2016-11-29 16:00    Symmetry Protected Kondo Metals and Their Phase Transitions
381 2017-11-03 16:00    Expedition to the Kitaev Quantum Spin Liquid: Hunting for Majorana fermions file
380 2022-07-14 15:00    Pure two-dimensional quantum electron liquid and its phase transition
379 2022-09-30 14:30    Putting a spin on the Josephson effect file
378 2018-04-13 10:00    Quantum meets Mechanics: from Quantum Information to Fundamental Research file
377 2019-05-01 16:00    Raman and x-ray scattering study on correlated electron systems: two case examples file
376 2022-05-25 16:00    Uncovering New Lampposts for Dark Matter: Continuum or Conformal
375 2022-05-11 16:00    Gravity as a phenomenon in quantum dynamics
374 2015-11-28 10:00    Electron Tunneling Spectroscopy of Single and Bilayer Graphene with Hexagonal Boron Nitride as Tunneling Barrier
373 2021-05-14 14:30    Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
372 2021-04-02 14:30    Quantum computing and entanglement generation using trapped ions and photons
371 2016-03-11 16:00    Jan. Switching handedness of of chiral solitons in Z4 topological insulators
370 2023-09-26 16:00    [High Energy Theory Seminar]A new step in interacting dark sector cosmologies
369 2019-03-29 16:00    Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
368 2025-05-28 16:00  Dr. Thiago L. M. Guedes (Forschungszentrum Jülich)  Computing the graph-changing dynamics of loop quantum gravity file
367 2018-06-18 10:00    Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file