| 학회 | 한국재료학회 |
| 학술대회 | 2015년 봄 (05/14 ~ 05/15, 구미코) |
| 권호 | 21권 1호 |
| 발표분야 | B. 바이오/화학 재료 |
| 제목 | Self-Assembled Nano-Particle-Clusters Array using transforming soft template by sublimation |
| 초록 | We demonstrated that a highly periodic dimple like defects structure of smectic A LC phase (SmA), toric focal conic domains (TFCDs), can be used to address NPs in the defect sites. Besides, we have demonstrated that the SmA shows a sublimation property and the TFCDs of the sublimable SmA can be transformed into nano-structures with TFCDs during thermal annealing. Here, we have demonstrated, for the first time, that NP clusters array in large area for F-SiO2 (d: 100nm) and QD, CdSe (d: 10nm) by using the transforming TFCDs as a template for directed self-clustering of NPs during thermal annealing. This process is mainly governed by the topological effect of the dimple like defects of TFCDs to confine the NPs with macroscopic array and the sublimation and reconstruction phenomenon to effectively form spherical NP clusters. Thus, we have confirmed the formation of NP clusters array using scanning electron microscopy (SEM) and fluorescence microscopy (FM) as well as investigated the mechanism using SEM and depolarized reflective light microscopy (DRLM) as function of thermal annealing times. This approach provides a simple and novel way to control NPs clustering and its macroscopic array in large area. Furthermore, this system may open a new clusters array system for various NP types to generate interesting opto-electric properties. |
| 저자 | 김대석1, Apiradee Honglawan2, 김경남3, 김문호4, 정소희3, Shu Yang5, 윤동기1 |
| 소속 | 1한국과학기술원, 2Univ. of Pennsylvania, 3한국기계(연), 4부경대, 5Unibersity of pensylvania |
| 키워드 | <P>Self-assembly; Liquid crystal; Sublimation; Nanoparticle cluster</P> |
