| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 기능성 고분자 |
| 제목 | Synthesis and stabilization of CdS quantum dots by P2VP-b-PHIC diblock copolymer |
| 초록 | Quantum dots are nanometer scale particles that are neither small molecules nor bulk solids. Their composition and small size give these dots extraordinary optical properties that can be readily customized by changing the size or composition of the dots. The most striking property that are found only in these materials is that the colour of the quantum dots, both in absorption and emission – can be “tuned” to any chosen wavelength by simply changing their size . The principle behind this unique property is called the quantum confinement effect. Because of the high surface area of nanocrystallites, synthesis of quantum dots without aggregation is a major problem. It is important to control the nanocrystals size, its distribution, the crystalinity and stochiometry of doped nanocrystals. We present synthesis and stabilization of CdS quantum dots using poly(2-vinylpyridine)-b-poly(n-hexylisocyanate) block copolymer. The diblock copolymer P2VP-b-PHIC1 is indeed a nice nanoreactor as it very efficiently allows the formation and stability of quantum dots. The size and distribution of the CdS quantum dots are well-controlled by varying the polymer concentration as well as the molar ratios of the 2VP and Cd2+ ions. The UV-Vis, PL and TEM data are in close agreement with the expected results. Most interestingly, the diblock copolymer that forms lamellar phases under suitable conditions also forms the CdS quantum dot arrays. This unprecedented control over quantum dot organization in the hierarchal pattern of the polymer would pave the way for applications in the area of nanofabrication. Reference : 1. J. S. Lee et al., Journal of American Chemical Society, 127, 4132 (2005) 2. H. Zhao et al., Langmuir, 17, 8428 (2001) 3. M. Antonietti et al., Nano Letter, 1, 61 (2001) |
| 저자 | Priyaranjan Mohapatra, 신원정, Shashadhar Samal, 이재석 |
| 소속 | 광주과학기술원 신소재공학과 |
| 키워드 | P2VP-b-PHIC; CdS; quantum dot |
