Abstract
L-glutathione (GSH) capped ZnSe quantum dots (QDs) were prepared by microwave-assisted aqueous synthesis. Then, the resulting QDs were illuminated under dark, ultraviolet light and incandescent light, respectively. Thereby effect of lighting on the structures and properties of QDs were studied systematically. It was revealed that particle size and element content of QDs took a sharp change after irradiation, while the crystal structure maintains nearly unaffected. Comparing to the ZnSe QDs under dark condition, counterparts irradiated by UV light possessed outstanding sphericity, size distribution and dispersion. And the content of sulfur (S) in ZnSe QDs irradiated by UV light was much higher relatively. The effect of lighting on vibration peaks of O−H was considerable. However, this effect was observed to be weak on other chemical bonds. The possible explanation ascribes to photo-chemical interactions can occur between S−H and O−H bonds on the surface of GSH ligand. The lighting induced GSH to occur photocatalytic oxidation on the surface of ZnSe QDs, which improved the optical properties of QDs. The effects of lighting rely on irradiation types, the sequence is UV light, incandescent light and dark from high to low.
Similar content being viewed by others
References
Lee J, Ji K, Kim J, Park C, Lim KH, Yoon TH, Choi K (2010) Acute toxicity of two CdSe/ZnSe quantum dots with different surface coating in daphnia magna under various light conditions. Environ Toxicol 25:593–600
Mihalache I, Radoi A, Mihaila M, Munteanu C, Marin A, Danila M, Kusko M, Kusko C (2015) Charge and energy transfer interplay in hybrid sensitized solar cells mediated by graphene quantum dots. Electrochim Acta 153:306–315
Andrade JJ, Brasil AGJ, Farias PMA, Fontes A, Santos BS (2009) Synthesis and characterization of blue emitting ZnSe quantum dots. Microelectronics J 40:641–643
Muthurasu A, Ganesh V (2004) Horseradish peroxidase enzyme immobilized graphene quantum dots as electrochemical biosensors. Appl Biochem Biotech 174:945–949
Li LB, Li L, Wang C, Liu KY, Zhu RH, Qiang H, Lin YQ (2015) Synthesis of nitrogen-doped and amino acid-functionalized graphene quantum dots from glycine, and their application to the fluorometric determination of ferric ion. Microchim Acta 182:763–770
Satyajit P, Anunay S (2013) A fluorescence correlation spectroscopy, steady-state, and time-resolved fluorescence study of the modulation of photophysical properties of mercaptopropionic acid capped CdTe quantum dots upon exposure to light. J Phys Chem C 117:23313–23321
Sun YH, Liu YS, Vernier PT, Liang CH, Chong SY, Marcu L, Gundersen MA (2006) Photostability and pH sensitivity of CdSe/ZnSe/ZnS quantum dots in living cells. Nanotechnol 17:4469–4476
Aldana J, Wang YA, Peng XG (2001) Photochemical instability of CdSe nanocrystals coated by hydrophilic thiols. J Am Chem Soc 123:8844–8850
Ma J, Chen JY, Guo J, Wang CC, Yang WL, Xu L, Wang PN (2006) Photostability of thiol-capped CdTe quantum dots in living cells: the effect of photo-oxidation. Nanotechnol 17:2083–2089
Lin YW, Hsieh MM, Liu CP, Chang HT (2005) Photoassisted synthesis of CdSe and core-shell CdSe/CdS quantum dots. Langmuir 21:728–734
Sai LM, Lu HT, He Y, Wang LH (2009) Microwave-assisted growth and characterizations of water-dispersed glutathione-capped ZnSe nanocrystals. J Funct Mater Devices 15:54–60
Huang CB, Wu CL, Zhang DN, Zheng JS, Lai JP, Li SY, Zhao YB (2009) The prepara tion of ZnSe Qdots in aqueous solution and the effects of photo-induced fluorescence enhancement. J ZJNU 32:91–96
Shavel A, Gaponik N, Eychmueller A (2004) Efficient UV-blue photoluminescing thiol-stabilized water soluble alloyed ZnSe(S) nanocrystals. J Phys Chem B 108:5905–5908
Peng XG, Schlamp MC, Kadavanich AV, Alivisatos AP (1997) Epitaxial growth of highly luminescent CdSe/CdS core/shell nanocrystals with photostability and electronic accessibility. J Am Chem Soc 119:7019–7029
Yang L, Xing RM, Shen QM, Jiang K, Ye F, Wang JY, Ren QS (2006) Fabrication of protein-conjugated silver sulfide nanorods in the bovine serum albumin solution. J Phys Chem B 110:10534–10539
Bao HB, Gong YJ, Li Z, Gao MY (2004) Enhancement effect of illumination on the photoluminescence of water-soluble CdTe nanocrystals: toward highly fluorescent CdTe/CdS core-shell structure. Chem Mater 16:3853–3859
Zheng YG, Yang ZC, Ying JY (2007) Aqueous synthesis of glutathione-capped ZnSe and Zn1–xCdxSe alloyed quantum dots. Adv Mater 19:1475–1479
Ding L, Zhou PJ, Zhan HJ, Chen C, Hu W, Zhou TF, Lin CW (2013) Microwave-assisted synthesis of L-glutathione capped ZnSe QDs and its interaction with BSA by spectroscopy. J Lumin 142:167–172
Hardman R (2006) A toxicologic review of quantum dots: toxicity depends on physicochemical and environmental factors. Environ Health Perspect 114:165–172
Derfus AM, Chan WCW, Bhatia SN (2004) Probing the cytotoxicity of semiconductor quantum dots. Nano Lett 4:11–18
Gagne F, Auclair P, Fournier M, Gagnon C, Sauve C, Blaise C (2008) Ecotoxicity of CdTe quantum dots to freshwater mussels: impacts on immune system, oxidative stress and genotoxicity. Aquat Toxicol 86:333–340
Acknowledgments
We gratefully acknowledge the financial support of the National High-Tech Research and Development Program of China (863 Program, 2007AA06Z418) and Youth Talent project of Science and Technology Research Program of Hubei Provincial Department of Education of China (Q20131105) and China Scholarship Council and Hubei Provincial Department of Education of China (201308420539) and Coal Conversion and New Carbon Materials Hubei Key Laboratory(Wuhan University of Science and Technology (WKDM201301) and Wuhan University of Science and Technology Foundation of China (z00980 and 2014XG006).
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
About this article
Cite this article
Ding, L., Peng, Z., Zhou, P. et al. Preparation and Effect of Lighting on Structures and Properties of GSH Capped ZnSe QDs. J Fluoresc 25, 1663–1669 (2015). https://doi.org/10.1007/s10895-015-1653-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10895-015-1653-7