| Title: |
Preparation and characterization of CdSe colloidal quantum dots by optical spectroscopy and 2D DOSY NMR |
| Authors: |
Geru, I.I.; Жеру, И.; Bordian, O.T.; Бордиан, О.Т.; Culeac, I.P.; Turtă, C.I.; Turta, C.; Turté, K.I.; Turta, K.I.; Туртэ, К.И.; Verlan, V.I.; Верлан, В.И.; Barbă, A.N.; Барба, А.Н. |
| Source: |
Proceedings of SPIE - The International Society for Optical Engineering (Ediţia 7, Vol.9258) |
| Publication Year: |
2015 |
| Subject Terms: |
2D DOSY NMR; CdSe; nanocrystals; photoluminescence; quantum dots |
| Description: |
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 |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://ibn.idsi.md/vizualizare_articol/191268 |
| DOI: |
10.1117/12.2070448 |
| Availability: |
https://ibn.idsi.md/vizualizare_articol/191268; https://doi.org/10.1117/12.2070448 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.CAE82E14 |
| Database: |
BASE |