A simple and Two-step synthesis of highly flourescent CdTe quantum dots: Investigation of the effect of UV light on flourescence of QDs

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SEYYEDMIR MOHAMMAD REZA; ZARE HAKIMEH

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: NANOSCALE Year:2020 | Volume:7 | Issue:2 Page(s): 89-96

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Title

A simple and Two-step synthesis of highly flourescent CdTe quantum dots: Investigation of the effect of UV light on flourescence of QDs

Author(s)

SEYYEDMIR MOHAMMAD REZA | ZARE HAKIMEH | Issue Writer Certificate

Keywords

Quantum dotsQ2

UV irradiationQ1

Effect sizeQ1

FluorescenceQ1

Photo etchingQ1

Abstract

Thioglycolic acid (TGA) capped CdTe Quantum dots (QDs) of different sizes (2. 7, 3 and 3. 4 nm) were prepared by aqueous method. Then, the fresh QDs were illuminated by ultraviolet (UV) light. Thereby effect of lighting on the optical properties of QDs were investigated systematically. It was revealed that emission spectra of QDs took a sharp change after UV illumination. The results show that the magnitude of changes in the Fluorescence intensity and peak position varies with the particle sizes. The intensity of Fluorescence peak of QDs with a size of 3. 4 nm increases to 5. 2 times after 102 h of UV illumination, whereas QDs with a size of 3 nm, peak maximum intensity considerably increases (31 times after 88 h illumination). The Fluorescence peak position of samples shifts toward the lower wavelengths. As size of QDs decreases, the emission peak position shifts more towards lower wavelengths under irradiation. In this paper, the mechanism of these changes of the optical properties of the QDs is studied.

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APA: Copy

SEYYEDMIR, MOHAMMAD REZA, & ZARE, HAKIMEH. (2020). A simple and Two-step synthesis of highly flourescent CdTe quantum dots: Investigation of the effect of UV light on flourescence of QDs. NANOSCALE, 7(2 ), 89-96. SID. https://sid.ir/paper/256968/en

Vancouver: Copy

SEYYEDMIR MOHAMMAD REZA, ZARE HAKIMEH. A simple and Two-step synthesis of highly flourescent CdTe quantum dots: Investigation of the effect of UV light on flourescence of QDs. NANOSCALE[Internet]. 2020;7(2 ):89-96. Available from: https://sid.ir/paper/256968/en

IEEE: Copy

MOHAMMAD REZA SEYYEDMIR, and HAKIMEH ZARE, “A simple and Two-step synthesis of highly flourescent CdTe quantum dots: Investigation of the effect of UV light on flourescence of QDs,” NANOSCALE, vol. 7, no. 2 , pp. 89–96, 2020, [Online]. Available: https://sid.ir/paper/256968/en

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