콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Influences of surface capping on particle size and optical characteristics of ZnS : Cu nanocrystals
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2006-07
- 저자명 박정호
- 학술지명 MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
- 발행처명 ELSEVIER SCIENCE SA
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
논문 초록 (Abstract)
ZnS:Cu nanocrystals were prepared by solution synthesis technique in thi s study, and the systematic investigation was carried outfor the surfac e capping effect in which the particle size could be controlled and the particle agglomeration could be reduced. The optical characteristics su ch as photoluminescence (PL) intensity and emission wavelength were also enhanced with surface capping. Sodium polyphosphate (SPP) was used as t he surface capping agent, and the new results about the effects of SPP c apping on structural and optical properties of ZnS:Cu nanocrystals were obtained as follows. ZnS nanoparticles had the cubic structure (beta-Zn S), and the crystal structure was not changed with the input of SPP. The particle morphology was spherical, and grain size was decreased and par ticle agglomeration was reduced with an increase of SPP input amount. Th e position of UV absorption edge was found to depend upon the SPP input amount, and it was decreased from 340 to 280 nm with the increase of SP P from 0.0 to 1.89 g, clearly showing the remarkable blue-shift phenomen on. PL intensities were also dependent upon the amount of capping agent, and the highest PL intensity was obtained for the sample capped with SP P 1.13 g in this study. PL emission wavelength was also blue-shifted, an d it was decreased from 518 to 462 nm with the increase of SPP from 0.0 to 1.89 g. (c) 2005 Elsevier B.V. All rights reserved.
