logo

korean english

게시판

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 2020학년도 1학기 콜로퀴움 일정 2020.01.31 206263
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 529543
615 2019학년도 2학기 콜로퀴움 일정 2019.07.17 379133
614 <5/16(토)> 세미나 개최 안내 2015.05.18 114490
613 2016학년도 1학기 콜로퀴움 일정 2016.02.03 108539
612 2017학년도 1학기 콜로퀴움 일정 2017.01.05 107092
611 2019학년도 1학기 콜로퀴움 일정 2019.01.08 95959
610 2018학년도 2학기 콜로퀴움 일정 2018.07.03 89624
609 2018학년도 1학기 콜로퀴움 일정 2018.01.03 83167
608 2014학년도 2학기 콜로퀴움 일정 2014.09.11 79819
607 2017학년도 2학기 콜로퀴움 일정 2017.07.04 76837
606 <4/2> Radio Detection of Ultra High Energy Cosmic Rays and Neutrinos in Antarctica 2014.03.26 73502
605 <5/1>In vivo optical imaging of hemodynamic changes 2009.05.06 72411
604 <6/2> The black hole search at the LHC: critical comment 2011.06.01 72253
603 <9/1> 원자핵 자기공명(Nuclear Magnetic Resonance) 해설 - 원자선에서 영상까지 2010.08.30 71983
» <10/28>Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube 2011.10.26 70994
601 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 70764
600 <4/19> Nuclear Reaction Theories 2011.04.14 70620
599 <9/15> Resistance Switching Behavior of Epitaxially Grown NiO Thin Films 2009.09.07 70535
598 2016학년도 2학기 콜로퀴움 일정 2016.08.02 69052