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Preparation and Characterization of CdSe Colloidal Quantum Dots by Optical Spectroscopy and 2D DOSY NMR
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| dc.contributor.author | GERU, I. | |
| dc.contributor.author | BORDIAN, O. | |
| dc.contributor.author | CULEAC, I. | |
| dc.contributor.author | TURTA, C. | |
| dc.contributor.author | VERLAN, V. | |
| dc.contributor.author | BARBA, A. | |
| dc.date.accessioned | 2021-08-21T13:39:24Z | |
| dc.date.available | 2021-08-21T13:39:24Z | |
| dc.date.issued | 2015 | |
| dc.identifier.citation | GERU, I., BORDIAN, O., CULEAC, I. et al. Preparation and Characterization of CdSe Colloidal Quantum Dots by Optical Spectroscopy and 2D DOSY NMR. In: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VII: proc. SPIE, 21-24 Aug. 2014 Constanta, Romania, 2015, V. 9258, p. 466-472. | en_US |
| dc.identifier.uri | https://doi.org/10.1117/12.2070448 | |
| dc.identifier.uri | http://repository.utm.md/handle/5014/16796 | |
| dc.description | Acces full text: https://doi.org/10.1117/12.2070448 | en_US |
| dc.description.abstract | 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 by a weak broad band in the near IR, related to the surface shallow trap emission. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | SPIE | en_US |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
| dc.subject | quantum dots | en_US |
| dc.subject | nanocrystals | en_US |
| dc.subject | crystals | en_US |
| dc.subject | photoluminescence | en_US |
| dc.subject | photoluminescent spectroscopy | en_US |
| dc.subject | nanodots | en_US |
| dc.title | Preparation and Characterization of CdSe Colloidal Quantum Dots by Optical Spectroscopy and 2D DOSY NMR | en_US |
| dc.type | Article | en_US |
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