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Determination of quantum dot size by Fourier transform visible spectroscopy

A. ARMĂȘELU1,*

Affiliation

  1. Transilvania University of Brasov, Faculty of Electrical Engineering and Computers Science, Department of Electrical Engineering and Applied Physics, Eroilor str. 29, Brasov, Romania

Abstract

Characterization of QD size is important in the process of preparation and their applications. Therefore, it is necessary to be found some quick, efficient, and trusted techniques for determination of the nanoparticle size. This paper proposes a possible investigation method of the size of commercial core-shell CdSe/ZnS quantum dots (QDs) using Fourier transform visible spectroscopy (FTVS). We found some relationships between the given QD sizes and their corresponding fluorescence (average) wavelengths, calculated from each emission peak of the Fourier transform spectra. These results show that FTVS is a novel, simple, fast, and reliable technique to estimate the CdSe/ZnS QD size. This methodology can be easily extrapolated to the size determination of other fluorescent nanoparticles..

Keywords

Fourier transform visible spectroscopy, Core-shell quantum dot, Size, Fluorescence average wavelength.

Citation

A. ARMĂȘELU, Determination of quantum dot size by Fourier transform visible spectroscopy, Optoelectronics and Advanced Materials - Rapid Communications, 9, 3-4, March-April 2015, pp.531-536 (2015).

Submitted at: Sept. 6, 2014

Accepted at: March 19, 2015