| 학회 |
한국화학공학회 |
| 학술대회 |
2015년 봄 (04/22 ~ 04/24, 제주 ICC) |
| 권호 |
21권 1호, p.891 |
| 발표분야 |
재료 |
| 제목 |
Direct Cd-to-Pb Cation Exchange in CdSe Nanorods Retaining Anisotropy |
| 초록 |
Cation exchange is known as a powerful tool to design novel nanocrystals which cannot be synthesized by routine hot-injeection or heating-up methods. Driven by difference of lattice energy or solvation energy, Pb2+ and Cd2+ can be exchanged with each other in various nanostructures including quantum dots (QDs), nanorods (NRs), or dot-in-rods, showing interesting properties. Here, we report direct Cd-to-Pb cation exchange in CdSe NRs which retain their original anisotropy. While PbCl2-oleylamine (OLA) complex induces morphology breakdown, Pb-oleate-OLA lead to direct Cd-to-Pb conversion with retained anisotropy. In contrast to the cation exchange using PbCl2-OLA, Pb-oleate-OLA makes partial conversion possible because of its milder kinetics. The series of results shows that chlorine and OLA play a crucial role in cation exchange process. Our findings will help designing various nanoheterostructures using cation exchange. |
| 저자 |
이동규1, 김휘동1, 이석원1, 이상헌2, 이도창1
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| 소속 |
1한국과학기술원, 2한국과학기술(연) |
| 키워드 |
Quantum dot; Cation exchange; CdSe nanorod
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| E-Mail |
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| 원문파일 |
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