신소재공학과

Seminar

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Date 20170824

■ TitleAberration-corrected liquid electron microscopy of colloidal and energy materials    

            
■ Speaker: Prof. Jong Min Yuk (MSE KAIST)

 

■ Date and time: 29th of August (Tue) 16:00

 

■ Venue: KAIST Applied Engineering B/D(W1), Multimedia Lecture Hall (1st Floor)

  

 Abstract : Liquid phase transmission electron microscopy (TEM) has solved many questions in biochemistry, materials science, environmental science, and catalysis. Such observations could greatly benefit from high-resolution offered by aberration-corrected TEMs. However the relatively thick SiN windows necessary to encapsulate the liquid under vacuum and even the liquid trapped between the windows degrades the TEM resolution and signal-to-noise ratio.   Thus, most of critical events are still vague due to the lack of ability to study specimen in liquid with atomic resolution. Here, we introduce a new type of liquid cell using graphene sheets to encase colloidal growth solution for in-situ high-resolution TEM (HR-TEM) imaging. The flexibility, mechanical strength and impermeability of graphene allow for the solution to remain liquid within the TEM vacuum while Pt nanoparticles grow and combine under the influence of the electron beam. We demonstrate in-situ observations of the growth, dynamics, and three-dimensional structures of individual colloidal nanocrystals by using graphene liquid cell TEM. I further show in-situ HR-TEM of lithiation process for diverse anode materials, which are not achievable with any other current methods.

 


List of Articles
No. Category Subject Author Date Views
Notice Regular 9/18 (Tue) Prof. Seong Jun Kang (Kyung Hee Univ.) ADMINI 2018.09.17 5
Notice Regular 9/11 (Tue) Dr. Byeongdu Lee (Argonne National Laboratory) ADMINI 2018.09.07 90
Notice Regular 9/4 (Tue) Prof. Kibum Kang (Department of MSE, KAIST) ADMINI 2018.09.03 97
Notice Regular 8/28 (Tue) Prof. Kyung-Min Kim (Department of MSE, KAIST) ADMINI 2018.08.24 136
Notice Special 8/24 (Fri) Prof. Joel W. Ager III (UC Berkeley, Lawrence Berkeley National Laboratory) file ADMINI 2018.08.20 155
Notice Special 8/23 (Thu) Prof. Jeehwan Kim (MIT, USA) file ADMINI 2018.08.20 172
Notice Special 8/23 (Thu) Prof. YANGUANG LI (Soochow University) file ADMINI 2018.08.20 91
233 Regular 10/24 (Tue) Prof. Sun-Jae Kim (Sejong, Univ) ADMINI 2017.10.20 976
232 Special 10/19 (Thu) Prof. Sang Cheol, Jung (Suncheon University) ADMINI 2017.10.18 1315
231 Regular 10/10 (Tue) Dr. Joo Choi (POSCO) ADMINI 2017.09.29 2227
230 Regular 9/26 (Tue) Prof. Tae-Woo Lee (Seoul National University) ADMINI 2017.09.22 1134
229 Regular 9/19 (Tue) Representative Sang Min Lee (Congressman) ADMINI 2017.09.15 1213
228 Special 9/12 (Tue) Monika Fleischer(Eberhard Karls University Tübingen) ADMINI 2017.09.14 821
227 Regular 2017 The Fall Semester Seminar file ADMINI 2017.09.08 2981
226 Regular 9/12 (Tue) Prof. Pil Jin, Yoo (Sungkyunkwan Univ) ADMINI 2017.09.08 1345
225 Special 9/11 (Mon) Won Joon, Cho (Lawrence Berkeley National Lab, Berkeley) ADMINI 2017.09.06 1362
224 Special 9/13 (Wed) Dr. In Kyung Yoo (SAIT) ADMINI 2017.09.06 1582
» Regular 8/24 (Tue) Prof. Jong Min Yuk (MSE KAIST) ADMINI 2017.08.24 1599
222 Special 6/16 (Fri) Dr. Bok Yeop Ahn (Harvard University) ADMINI 2017.06.13 3157
221 Special 6/12 (Mon) Prof. C. Suryanarayana (University of Central Florida) ADMINI 2017.06.05 1335
220 Special 6/2 (fri) Robert M. Ulfig (CAMECA Instruments Inc) ADMINI 2017.06.01 1332
219 Special 6/5 (Mon) Dr. Aron Varga/Dr. Andriy Lotnyk ADMINI 2017.05.30 1418
218 Regular 5/30 (Tue) Prof. Chang Hyeon Ko (Sookmyung Univ) ADMINI 2017.05.26 1535
217 Regular 5/23 (Tue) Prof. Don Hyeong Ha (Choongang university) ADMINI 2017.05.19 1127
216 Regular 5/16 (Tue) Prof. Eun Sun Cho (KAIST CBE) ADMINI 2017.05.10 1338
215 Regular 5/2 (Tue) Prof. Seung Woo Lee (SKKU) ADMINI 2017.04.28 1422
214 Regular 4/25 (Tue) Prof. Hyeong Sup Choi (Seoul National University of Science and Technology) ADMINI 2017.04.20 1248
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