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)
445 2016-03-11 13:30    Topological phases of matter in nonequilibrium: Topology of the Wannier-Stark ladder
444 2018-11-01 16:00    Direct holography from a single snapshot file
443 2022-08-18 10:00    Disorder-driven phase transition in the second-order non-Hermitian skin effect
442 2023-04-27 11:00    Inverse Shapiro steps and coherent quantum phase slip in superconducting nanowires
441 2015-07-16 16:00    Next-generation ultrafast laser technology for nonlinear optics and strong-field physics
440 2018-10-26 16:00    Coexisting triple-point and nodal-line topological magnons and thermal Hall effect in pyrochlore iridates file
439 2017-03-24 14:30    Topological Dynamics
438 2015-10-15 10:00    Development of Large-Bore, High Field Magnets at the NHMFL
437 2023-06-22 16:00    [CAPP Seminar] The muon g-2 puzzle file
436 2016-05-19 15:00    The CERN Resonant WISP Search: Development, Results and Lesson-Learned
435 2016-07-08 11:00    Isostatic magnetism
434 2015-11-23 13:30    What's Beyond the Standard Model? Lessons from Run I and what might come in Run II
433 2017-02-01 14:00    Quantum electron optics using flying electrons
432 2019-09-10 15:00    Two-Stage Kondo Effect file
431 2017-11-03 14:30    Quantum Resistor-Capacitor Circuit with Majorana Edge States file
430 2019-07-30 16:00    Dirac fermions and flat bands in correlated kagome metals file
429 2023-07-11 11:00    Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
428 2017-04-28 16:00    Carbon nanotubes coupled to superconducting impedance matching circuits
427 2016-09-29 16:00    Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?
426 2019-06-12 15:00    The relation between free and interacting fermionic SPT phases file