LBNL 한인 모임

김용주 박사 세미나.jpg Title : Controlled self-assembly of block copolymer particles from emulsions : Combined study of experiment, theory, and simulation

 

YongJoo Kim, KI for NanoCentury, KAIST, KOREA

 

Abstract : Shape-anisotropic particles have drawn significant attention as building blocks for colloidal superstructures. The anisotropic shape gives rise to unusual physical responses, such as interparticle capillary interactions, light-matter interactions, rheological behaviors under flow, and collective behaviors under external fields. Significant progress has been made in controlling the shape of inorganic nanoparticles, including rods, tetrapods, and ellipsoids. However, it still remains a challenge to develop anisotropic soft polymeric particles by solution processing, particularly in the size range of 100 nm to several micrometers.

 

Conventional methods for the fabrication of nonspherical polymeric particles are based on mechanical deformations which are either expensive and/or improper for large-scale production. Recently, rather simple method for generating nonspherical polymeric particles was developed using self-assembly of block copolymers (BCPs) confined in emulsion droplets, induced by evaporation of solvent from the interior phase of the emulsion. Due to the soft-confinement of BCPs within the emulsion droplet, anisotropic particle is generated to minimize the free energy of BCPs. Here, we introduce the shape-controlled BCP particles from emulsions depending on size of the emulsion, interfacial property, and evaporation rate of the solvent. Theory and simulation explain the self-assembly physics of BCPs under soft-confinement from the emulsion droplet.

 

BIO: Dr. YongJoo Kim, who is a KI Fellow at KAIST Korea, is working on self-assembly behavior of soft-matter such as polymers. He received Ph.D. in Materials Science and Engineering at MIT and has BS in Materials Science and Engineering at POSTEH, South Korea. 



번호 제목 글쓴이 날짜 조회 수
공지 UKC 2014 Volunteers needed! orppaha 2014.05.28 8014
공지 LBNL 초기 정착 도우미 서비스 (LBNL Initial Settlement Assistance Service) orppaha 2013.08.01 9120
공지 KSEA Berkeley Chapter 소개 orppaha 2013.07.31 8056
공지 LBNL K-Network orppaha 2013.07.31 8072
18 2019 Apr. Farewell Dinner for Dr. Shin and Dr. Cho file 지미버틀러 2019.04.11 128
17 Photo-chemistry and -physics of Ir complexes (190410 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.11 86
16 A single-ion conducting borate network polymer as a viable electrolyte for Li-metal batteries (190410 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.11 36
15 Surface and Interfacial Chemistry of Bio-inspired Phenolic Coatings (190213 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.11 31
14 Study on the chemical/electronic structures of organic functional materials by combining photoemission spectroscopy with argon gas cluster ion beam sputtering (181214 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.11 30
13 High Symmetry Ordered Multigrain Nanocrystals to Reveal and Maximize the Effect of Grain Boundary Defects (181018 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.11 30
12 2018 Sep. Farewell Lunch for Dr. Kim file 지미버틀러 2019.04.10 53
11 Development of Innovative materials and process technology: 1. Microreactors for Better Chemical Processes 2. Peptide Self-Assembly (180813 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.10 30
10 2018 July Farewell Dinner for Prof. Kim and Prof. Lee file 지미버틀러 2019.04.10 41
9 2018 May Happy Hour file 지미버틀러 2019.04.10 37
8 Simulation studies on dynamical and structural properties of liquid state materials: From the perspective of statistical mechanics (180612 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.10 24
7 Antimony selenide (Sb2Se3) photocathode for photoelectrochemical water splitting (180409 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.10 27
6 Designing (photo)electrocatalysts with consideration of its application to real device for hydrogen economy and artificial photosynthesis (180227 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.10 29
5 An Overview of R&D Activities around NST, KISTI and NERSC (171213 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.04.10 25
» Controlled self-assembly of block copolymer particles from emulsions : Combined study of experiment, theory, and simulation (171016 KSEA Berkeley Chapter Seminar) file 지미버틀러 2019.02.24 158
3 KSEA North West Regional Conference 2013 - Seattle file orppaha 2013.08.14 7623
2 Korea Electrotechnology Research Institute and Berkeley Lab Will Work Together on Smart Grid R&D orppaha 2013.08.07 5399