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| Ultima descărcare din IBN: 2024-02-23 14:22 |
 SM ISO690:2012GERU, Ion, BORDIAN, Olga, CULEAC, Ion, TURTA, Constantin, VERLAN, Victor, BARBA, Alic. Preparation and characterization of CdSe colloidal quantum dots by optical spectroscopy and 2D DOSY NMR. In: Proceedings of SPIE - The International Society for Optical Engineering, Ed. 7, 21-24 august 2014, Constanța. Bellingham, Washington: SPIE, 2015, Ediţia 7, Vol.9258, pp. 1-8. ISBN 978-162841325-0. ISSN 0277786X. DOI: https://doi.org/10.1117/12.2070448 |
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 Proceedings of SPIE - The International Society for Optical Engineering Ediţia 7, Vol.9258, 2015 |
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Conferința "Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies" 7, Constanța, Romania, 21-24 august 2014 | ||||||
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| DOI:https://doi.org/10.1117/12.2070448 | ||||||
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We present experimental results on preparation and characterization of colloidal CdSe quantum dots (QD) in organic solvent. CdSe QDs were synthesized following a modified literature method and have been characterized by UV-Vis absorption and photoluminescent (PL) spectroscopy, as well as by 2D Diffusion Ordered Spectroscopy (DOSY) NMR. The average CdSe particles size estimated from the UV-Vis absorption spectra was found to be in the range 2.28-2.92 nm, which correlates very well with the results obtained from NMR measurements. The PL spectrum for CdSe nanodots can be characterized by a narrow emission band with the peak maximum shifting from 508 to 566 nm in dependence of the CdSe nanoparticle size. The PL is dominated by a near-band-edge emission, accompanied |
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| Cuvinte-cheie 2D DOSY NMR, CdSe, nanocrystals, photoluminescence, quantum dots |
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