Temporal evolution of optical absorption and emission spectra of thiol capped CdTe quantum dots
Source abstract
Abstract
To understand the effect of end-groups of thiol-molecules on the structural, absorption, and photoluminescence (PL) properties, CdTe quantum dots (QDs) were synthesized with the capping of thioglycolic acid (TGA), mercaptoethylamine (MEA), l-cysteine (l-Cys) and glutathione (GSH) in aqueous medium. The growth kinetics of the nanocrystals with the variation in the end-groups of thiols has also been spectroscopically investigated. The average sizes of the nanocrystals ranged from 2 to 5 nm, which is well within the quantum confinement regime. The size and phase purity of the QDs were determined by XRD and HRTEM. With respect to size-distribution, the temporal evolution of QDs was found to involve three stages, namely focusing, defocusing and equilibrium. Hydrodynamic sizes were also measured using DLS system. FTIR spectra revealed that the thiol end of the capping agent binds to the particle–surface while the carboxyl or amine group remain free. The multi-colour photoluminescence illustrated the excellent size-tunable optical properties of the QDs. Zeta-potential for TGA-capped CdTe QDs was measured to be − 45 mV, indicating high surface charge and hence greater colloidal stability. Such QDs are well suited for bioimaging and therapeutic applications.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Nanocluster Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Y. Yin, A.P. Alivisatos, Colloidal nanocrystal synthesis and the organic–inorganic interface. Nature 437(7059), 664–670 (2005)10.1038/nature04165 ↗
2. A. Shavel, N. Gaponik, A. Eychmüller, Factors governing the quality of aqueous CdTe nanocrystals: calculations and experiment. J. Phys. Chem. B 110(39), 19280–19284 (2006)10.1021/jp063351u ↗
3. A. Priyam, A. Chatterjee, S.C. Bhattacharya, A. Saha, Surface-functionalized cadmium chalcogenide nanocrystals: a spectroscopic investigation of growth and photoluminescence. J. Cryst. Growth 304(2), 416–424 (2007)10.1016/j.jcrysgro.2007.02.026 ↗
4. A.M. Kapitonov, A.P. Stupak, S.V. Gaponenko, E.P. Petrov, A.L. Rogach, A. Eychmüller, Luminescence properties of thiol-stabilized CdTe nanocrystals. J. Phys. Chem. B 103(46), 10109–10113 (1999)10.1021/jp9921809 ↗
5. S. Gupta, R.K. Choubey, L.K. Sharma, M.P. Ghosh, M. Kar, S. Mukherjee, Exploring the magnetic ground state of vanadium doped zinc sulphide. Semicond. Sci. Technol. 34(10), 105006 (2019)10.1088/1361-6641/ab3a00 ↗
6. S. Tomar, S. Gupta, S. Mukherjee, A. Singh, S. Kumar, R.K. Choubey, Manganese-doped ZnS QDs: an investigation into the optimal amount of doping. Semiconductors 54(11), 1450–1458 (2020)10.1134/S106378262011024X ↗
7. X. Gao, Y. Cui, R.M. Levenson, L.W. Chung, S. Nie, In vivo cancer targeting and imaging with semiconductor quantum dots. Nat. Biotechnol. 22(8), 969–976 (2004)10.1038/nbt994 ↗
8. C.Y. Zhang, H.C. Yeh, M.T. Kuroki, T.H. Wang, Single-quantum-dot-based DNA nanosensor. Nat. Mater. 4(11), 826–831 (2005)10.1038/nmat1508 ↗
9. I.L. Medintz, H.T. Uyeda, E.R. Goldman, H. Mattoussi, Quantum dot bioconjugates for imaging, labelling and sensing. Nat. Mater. 4(6), 435–446 (2005)10.1038/nmat1390 ↗
10. L. Qi, X. Gao, Emerging application of quantum dots for drug delivery and therapy. Expert Opin. Drug Deliv. 5(3), 263–267 (2008)10.1517/17425247.5.3.263 ↗
11. A.C. Samia, S. Dayal, C. Burda, Quantum dot-based energy transfer: perspectives and potential for applications in photodynamic therapy. Photochem. Photobiol. 82(3), 617–625 (2006)10.1562/2005-05-11-IR-525 ↗
12. C. Murray, D.J. Norris, M.G. Bawendi, Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites. J. Am. Chem. Soc. 115(19), 8706–8715 (1993)10.1021/ja00072a025 ↗
13. D.V. Talapin, S. Haubold, A.L. Rogach, A. Kornowski, M. Haase, H. Weller, A novel organometallic synthesis of highly luminescent CdTe nanocrystals. J. Phys. Chem. B 105(12), 2260–2263 (2001)10.1021/jp003177o ↗
14. N. Gaponik, A.L. Rogach, Thiol-capped CdTe nanocrystals: progress and perspectives of the related research fields. Phys. Chem. Chem. Phys. 12(31), 8685–8693 (2010)10.1039/c000916d ↗
15. W.W. Yu, X. Peng, Formation of high-quality CdS and other II–VI semiconductor nanocrystals in noncoordinating solvents: tunable reactivity of monomers. Angew. Chem. Int. Ed. 41(13), 2368–2371 (2002)10.1002/1521-3773(20020703)41:13<2368::AID-ANIE2368>3.0.CO;2-G ↗
16. D.V. Talapin, A.L. Rogach, I. Mekis, S. Haubold, A. Kornowski, M. Haase, H. Weller, Synthesis and surface modification of amino-stabilized CdSe, CdTe and InP nanocrystals. Colloids Surf., A 202(2–3), 145–154 (2002)10.1016/S0927-7757(01)01078-0 ↗
17. S.F. Wuister, C. de Mello Donega, A. Meijerink, Influence of thiol capping on the exciton luminescence and decay kinetics of CdTe and CdSe quantum dots. J. Phys. Chem. B 108(45), 17393–17397 (2004)10.1021/jp047078c ↗
18. T. Kondratenko, O. Ovchinnikov, I. Grevtseva, M. Smirnov, O. Erina, V. Khokhlov, B. Darinsky, E. Tatianina, Thioglycolic acid FTIR spectra on Ag2S quantum dots interfaces. Materials 13(4), 909 (2020)10.3390/ma13040909 ↗
19. K. Rajar, A. Balouch, M.I. Bhanger, M.T. Shah, T. Shaikh, S. Siddiqui, Succinic acid functionalized silver nanoparticles (Suc-Ag NPs) for colorimetric sensing of melamine. Appl. Surf. Sci. 435, 1080–1086 (2018)10.1016/j.apsusc.2017.11.208 ↗
20. M.T. Yaraki, M. Tayebi, M. Ahmadieh, M. Tahriri, D. Vashaee, L. Tayebi, Synthesis and optical properties of cysteamine-capped ZnS quantum dots for aflatoxin quantification. J. Alloy. Compd. 690, 749–758 (2017)10.1016/j.jallcom.2016.08.158 ↗
21. J. Kim, B.T. Huy, K. Sakthivel, H.J. Choi, W.H. Joo, S.K. Shin, M.J. Lee, Y.I. Lee, Highly fluorescent CdTe quantum dots with reduced cytotoxicity—a robust biomarker. Sens. Bio-Sens. Res. 3, 46–52 (2015)10.1016/j.sbsr.2014.12.001 ↗
22. S.K. Vaishanav, J. Korram, P. Pradhan, K. Chandraker, R. Nagwanshi, K.K. Ghosh, M.L. Satnami, Green luminescent CdTe quantum dot based fluorescence nano-sensor for sensitive detection of arsenic (III). J. Fluoresc. 27(3), 781–789 (2017)10.1007/s10895-016-2011-0 ↗
23. F. Kogelheide, K. Kartaschew, M. Strack, S. Baldus, N. Metzler-Nolte, M. Havenith, P. Awakowicz, K. Stapelmann, J.W. Lackmann, FTIR spectroscopy of cysteine as a ready-to-use method for the investigation of plasma-induced chemical modifications of macromolecules. J. Phys. D Appl. Phys. 49(8), 084004 (2016)10.1088/0022-3727/49/8/084004 ↗
24. M.J. Farrell, R.J. Reaume, A.K. Pradhan, Visual detection of denatured glutathione peptides: a facile method to visibly detect heat stressed biomolecules. Sci. Rep. 7(1), 1–11 (2017)10.1038/s41598-017-02899-3 ↗
25. J. Kaur, V. Kumar, K.B. Tikoo, S. Bansal, A. Kaushik, S. Singhal, Glutathione modified fluorescent CdS QDs synthesized using environmentally benign pathway for detection of mercury ions in aqueous phase. J. Fluoresc. 30(4), 773–785 (2020)10.1007/s10895-020-02545-8 ↗
26. S. Sapra, D.D. Sarma, Evolution of the electronic structure with size in II–VI semiconductor nanocrystals. Phys. Rev. B 69(12), 125304 (2004)10.1103/PhysRevB.69.125304 ↗
27. S. Sapra, N. Shanthi, D.D. Sarma, Realistic tight-binding model for the electronic structure of II–VI semiconductors. Phys. Rev. B 66(20), 205202 (2002)10.1103/PhysRevB.66.205202 ↗
28. X. Peng, J. Wickham, A.P. Alivisatos, Kinetics of II-VI and III-V colloidal semiconductor nanocrystal growth: “focusing” of size distributions. J. Am. Chem. Soc. 120(21), 5343–5344 (1998)10.1021/ja9805425 ↗
29. W.W. Yu, L. Qu, W. Guo, X. Peng, Experimental determination of the extinction coefficient of CdTe, CdSe, and CdS nanocrystals. Chem. Mater. 15(14), 2854–2860 (2003)10.1021/cm034081k ↗
30. A. Priyam, S. Ghosh, S.C. Bhattacharya, A. Saha, Supersaturation driven tailoring of photoluminescence efficiency and size distribution: a simplified aqueous approach for producing high-quality, biocompatible quantum dots. J. Colloid Interface Sci. 333(1), 195–201 (2009)10.1016/j.jcis.2009.01.072 ↗
31. S. Modes, P. Lianos, Luminescence probe study of the conditions affecting colloidal semiconductor growth in reverse micelles and water-in-oil microemulsions. J. Phys. Chem. 93(15), 5854–5859 (1989)10.1021/j100352a040 ↗
32. R. Viswanatha, D.D. Sarma, Study of the growth of capped ZnO nanocrystals: a route to rational synthesis. Chem. Eur. J. 12(1), 180–186 (2006)10.1002/chem.200500632 ↗
33. T. Sugimoto, Preparation of monodispersed colloidal particles. Adv. Colloid Interface Sci. 28, 65–108 (1987)10.1016/0001-8686(87)80009-X ↗
34. D.V. Talapin, A.L. Rogach, M. Haase, H. Weller, Evolution of an ensemble of nanoparticles in a colloidal solution: theoretical study. J. Phys. Chem. B 105(49), 12278–12285 (2001)10.1021/jp012229m ↗
35. A. Chatterjee, A. Priyam, S.C. Bhattacharya, A. Saha, Differential growth and photoluminescence of ZnS nanocrystals with variation of surfactant molecules. Colloids Surf A 297(1–3), 258–266 (2007)10.1016/j.colsurfa.2006.10.053 ↗
36. S. Kanagasubbulakshmi, K. Kadirvelu, Nano interface potential influences in CdTe quantum dots and biolabeling. Appl. Nanosci. 8(3), 285–295 (2018)10.1007/s13204-018-0774-0 ↗