CHARACTERIZATION OF THE INTERACTION OF CDTE QUANTUM DOTS WITH HUMAN SERUM ALBUMIN BY OPTICAL SPECTROSCOPIC TECHNIQUES
Journal Title: Сенсорна електроніка і мікросистемні технології - Year 2015, Vol 12, Issue 3
Abstract
The interaction between CdTe quantum dots (QDs) and human serum albumin (HSA) was studied by absorption and photoluminescence spectroscopy. Three aqueous-compatible samples of colloidal CdTe nanoparticles with average sіze of 2.8, 2.9 and 3.1 nm were tested. In the absorption spectra of the colloidal CdTe QDs exciton band was found to be shifted to higher photon energy as compared with that for bulk crystals due to the quantum confinement effect. It was shown that addition of HSA to colloidal CdTe nanoparticles leds to a gradual decrease of absorption and broadening of exciton structure. The photoluminescence quenching results indicated that the quenching effect of QDs on HSA fluorescence depend on the size and temperature and the nature of quenching is static, resulting in forming QDs–HSA complexes. Stern – Volmer plots were made and quenching constants were thus obtained. The results suggested the quenching constants increasing with increasing of the sizes QDs and decrease with increasing temperatures of QDs-HSA solutions.
Authors and Affiliations
I. D. Stolyarchuk, A. I. Savchuk, R. Wojnarowska - Nowak, J. Polit
Keywords
Related Articles
- EP ID EP399101
- DOI 10.18524/1815-7459.2015.3.107698
- Views 78
- Downloads 0
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