| 학회 |
한국재료학회 |
| 학술대회 |
2007년 가을 (11/02 ~ 11/02, 성균관대학교) |
| 권호 |
13권 2호 |
| 발표분야 |
나노생체재료 |
| 제목 |
Energy band gap enhancement and coarsening kinetics of CdSe nanocrystals via Mn-doping |
| 초록 |
CdSe and Mn:CdSe colloidal nanocrystals were prepared via the paraffin oil as a solvent and oleic acid as a capping regands. Their crystal structure, size and morphology were controlled varying these regands ratio, synthesis temperature and impurities atoms concentration. X-ray diffraction (XRD) patterns were used for determine the crystal structure as a well crystallized Zinc-Blend and calculate the particle size which show size increase as increasing doping concentration which considered impurity atoms affected important role for growth rate. Especially, ripeining rate difference with different binding energy with selenium ions. As prepared nanocrystals were washed several times for removing remained source then dispersed in paraffin oil again to observe ripeining rate with heating at 220, 230, 240 and 250 oC with different time period. The ripeining rates and size distribution were monitored with UV-visible spectra which showed different growth rates depend on incorporated atoms and their concentration. High-resolution transmission electron microscopy (HRTEM) images show sphere shape and size distribution of each system. |
| 저자 |
곽우철, 성윤모, 이정철, 이명기, 김민석, 노경민
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| 소속 |
고려대 |
| 키워드 |
CdSe; Mn-doping; Kinetics; nanocrystals
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| E-Mail |
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