미세유체반응기를 이용한 core/shell 연속 합성 시스템을 이용한 CdSe/ZnS 양자점 합성 및 분석
Synthesis and analysis CdSe/ZnS quantum dot with a Core/shell Continuous Synthesis System Using a Microfluidic Reactor
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Core/shell CdSe/ZnS quantum dots (QDs) are synthesized by a microfluidic reactor-assisted continuous reactor system. Photoluminescence and absorbance of synthesized CdSe/ZnS core/shell QDs are investigated by fluorescence spectrophotometry and online UV-Vis spectrometry. Three reaction conditions, namely; the shell coating reaction temperature, the shell coating reaction time, and the ZnS/CdSe precursor volume ratio, are combined in the synthesis process. The quantum yield of the synthesized CdSe QDs is determined for each condition. CdSe/ZnS QDs with a higher quantum yield are obtained compared to the discontinuous microfluidic reactor synthesis system. The maximum quantum efficiency is 98.3% when the reaction temperature, reaction time, and ZnS/CdSe ratio are 270oC, 10s, and 0.05, respectively. Obtained results indicate that a continuous synthesis of the Core/shell CdSe/ZnS QDs with a high quantum efficiency could be achieved by isolating the reaction from the external environment.
Abstract
Core/shell CdSe/ZnS quantum dots (QDs) are synthesized by a microfluidic reactor-assisted continuous reactor system. Photoluminescence and absorbance of synthesized CdSe/ZnS core/shell QDs are investigated by fluorescence spectrophotometry and online UV-Vis spectrometry. Three reaction conditions, namely; the shell coating reaction temperature, the shell coating reaction time, and the ZnS/CdSe precursor volume ratio, are combined in the synthesis process. The quantum yield of the synthesized CdSe QDs is determined for each condition. CdSe/ZnS QDs with a higher quantum yield are obtained compared to the discontinuous microfluidic reactor synthesis system. The maximum quantum efficiency is 98.3% when the reaction temperature, reaction time, and ZnS/CdSe ratio are 270oC, 10s, and 0.05, respectively. Obtained results indicate that a continuous synthesis of the Core/shell CdSe/ZnS QDs with a high quantum efficiency could be achieved by isolating the reaction from the external environment.
참고문헌 (23)
- K. Kim, , Sci. Rep., 7, pp.43581~ (2017)[DOI]
- H. McDaniel, , Nature, 4, pp.2887~ (2013)
- L. Sun, , Nat. Nanotechnol., 7, pp.369~ (2012)[DOI]
- T. P. A. Ruberu, , J. Phys. Chem. Lett., 3, pp.2798~ (2012)[DOI]
- S. Taniguchi, , J. Mater. Chem., 21, pp.2877~ (2011)[DOI]
- D. J. Norris, , Nano Lett., 1, pp.3~ (2001)[DOI]
- C. B. Murray, , J. Am. Chem. Soc., 115, pp.8706~ (1993)[DOI]
- W. R. Ware, , J. Chem. Phys., 43, pp.1194~ (1965)[DOI]
- B. O. Dabbousi, , J. Phys. Chem. B, 101, pp.9463~ (1997)[DOI]
- Y. Wang, , Nano Lett., 4, pp.2047~ (2004)[DOI]
- 엄누시아, "Se 전구체 함량 따른 CdSe 양자점 형광체의 발광특성", 한국분말재료학회지, 19(6), pp.442~445 (2012), 한국분말재료학회
- H. Zhang, , MATEC Web of Conferences, 26, pp.01006~ (2015)
- A. Jahn, , J. Nanopart. Res., 10, pp.925~ (2008)[DOI]
- J. W. Hong, , Nat. Biotechnol., 21, pp.1179~ (2003)[DOI]
- A. Abou-Hassan, , Angew. Chem. Int. Ed., 49, pp.6268~ (2010)[DOI]
- J. B. Edel, , ChemComm, 10, pp.1136~ (2002)
- E. M. Chan, , Nano Lett., 3, pp.199~ (2003)[DOI]
- J. I. Park, , Annu. Rev. Mater. Res., 40, pp.415~ (2010)[DOI]
- A. J. Demello, , Nature, 442(7101), pp.394~
- D. N. Adamson, , Lab Chip, 6, pp.1178~ (2006)[DOI]
- A. V. Baranov, , Phys. Rev. B, 68, pp.165306~ (2003)[DOI]
- H. Zhu, , J. Am. Chem. Soc., 132, pp.15038~ (2010)[DOI]
- H. Zhu, , Nanotechnology, 21, pp.255604~ (2010)[DOI]