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| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
MAT.P-530 |
| Subject |
Self-Assembly Control of Polymer-Coated Gold Nanocrystals |
| Authors |
Hongseok Yun, Bumjoon Kim1,*
Korea Advanced Institute of Science and Technology, Korea
1Department of Chemical Engineering & Biotechnology, Korea Advanced Institute of Science and Technology, Korea
|
| Abstract |
Colloidal nanocrystals (NCs) can serve as new building blocks for preparing metamaterials. The self-assembly of NCs enriches the polymorphism of NCs through ligand-, NC shape-, and solvent-mediated approaches. Herein, we present polymorphism control of polystyrene-coated Au NCs (Au@PS) by changing PS grafting density. Au NCs with varied polymer grafting density were prepared by ligand-exchange processes. TEM images indicated successful ligand exchange by gradually increasing interparticle distance. As-prepared Au@PS particles were self-assembled using liquid-air interface assembly technique. TEM images and grazing incidence small-angle X-ray scattering (GISAXS) measurements showed highly ordered Au@PS superstructures in long range. In particular, the transition of NC assembly structure from body centered cubic (bcc) to face centered cubic (fcc) was observed upon grafting density increase. This work emphasizes the importance of ligand grafting density for building and manipulating the NC superstructures. |
| E-mail |
mujinck@gmail.com |
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121st General Meeting of the KCS