korean english


Home > 게시판 > 세미나

아래와 같이 세미나를 개최하오니 많이 참석해 주시기 바랍니다.


                    아     래


제목: Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube


연사:  Dr. Chang-Yong Kim (Canadian Light Source)


일시: 2011년 10월 28일(금) 오전 11:00


장소:  물리학과 세미나실 (31355호실) 


초록: Grazing incidence X-ray diffraction and surface X-ray diffraction have been used to study mono-dispersive -Fe2O3 nano-cubes dip-coated on silicon wafer.
Hematite nanoparticle has drawn great research interest to overcome short decay length of charge carrier in solar energy conversion or to increase surface area for catalysis application.
Since chemical reaction or transport of charge carrier involve surface or interface of nanoparticle, study of surface atomic and electronic structure of nanoparticle is crucial. General consensus is that significant portion of atoms in a nanoparticle exhibits characteristic of surface/subsurface atom. Attempt to study the structural arrangement of surface/subsurface atoms of nanoparticle has been hampered due to an irregular/nonuniform shape and size of nanoparticle. Recent synthesis methods have progressed to produce mono-dispersive nanoparticles with a uniform shape. Provided proper alignment this type of nanoparticle could give opportunity to study surface structure of nanoparticle.
The -Fe2O3 nano-cubes enclosed by six identical {0 1 -1 2} planes have been synthesized with hydrothermal process. The synthesized nano-cubes with typical length scale of 50 nm were deposited on thermal oxide film of silicon wafer with a dip-coating method. Grazing incidence X-ray diffraction results revealed that the dip-coated nano-cubes were arranged by contacting the {0 1 -1 2} plane on the wafer. Preliminary surface X-ray scattering data were obtained from the dip-coated nano-cube surface. Thermal treatment effect to the nano-cube and possible application of monodispersive, uniform shape nanoparticle system will be discussed.
Figure 1. SEM (left) and grazing incidence X-ray diffraction (right) measurements from dip-coated -Fe2O3 nano-cubes.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1078228
125 <5/1> Supersymmetry Breaking in Chern-Simons-matter Theories 2012.04.30 73193
124 <4/24> How to introduce the monopole in quantum mechanics? 2012.04.23 74347
123 <4/18> Action-angle variables for the near-horizon extreme black hole particle dynamics 2012.04.17 111028
122 <4/23> BK 석학초청 특별강연 - Connections between Stellar Evolution and Nuclear Physics 2012.04.16 77680
121 <4/6> Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment 2012.04.04 74956
120 <3/14> Proto-neutron star 2012.03.08 68343
119 <3/22> 석학초청 특별강연 – Pyeongyang Advances Its Nuclear Program 2012.03.07 67318
118 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 252562
117 <11/3> Special Seminar - "2011 Nobel Physics: The beginning and the end of the universe" 2011.10.27 81578
» <10/28>Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube 2011.10.26 125501
115 <9/20> 초전도분야 특별초청세미나 개최 file 2011.09.16 83577
114 <9/7> Magnets and Science at the NHMFL 2011.09.06 82279
113 <7/14> Calculating the partition function of N=2 Gauge theories on $S^3$ and AdS/CFT correspondence 2011.07.12 97802
112 <6/10> 초전도 분야 특별세미나 개최 file 2011.06.01 82837
111 <6/2> The black hole search at the LHC: critical comment 2011.06.01 164438
110 <4/22> How Many is Different? Ideal Bose gas revisited 2011.04.22 95993
109 <4/19> Nuclear Reaction Theories 2011.04.14 99243
108 <2/16>Hamiltonian formalism 2011.02.11 90206
107 <2/15> Perturbation during Inflation 2011.02.11 89200
106 <2/14> Basics of Gravitational Perturbatiosn 2011.02.11 84636