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© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Quantum dots (QDs) are semiconductor materials, with a size range between 1–10 nm, showcasing unique size-dependent physical and chemical properties. Such properties have potentiated their use in areas like medical imaging and biosensing. Herein, we present an open-air approach for synthesis of QDs, reducing the need for controllable atmospheric conditions. Furthermore, we present a predictive mathematical model for maximum emission wavelength (λmax) control. Through a straightforward microwave-based aqueous synthesis of TGA-CdTe QDs, we investigated the influence of time, temperature, and Te:Cd and TGA:Cd molar ratios on λmax, using a chemometric experimental design approach. CdTe-QDs were characterized by UV-Vis and fluorescence spectroscopies. Additionally, Fourier-Transform Infrared spectroscopy, X-ray photoelectron spectroscopy, Transmission Electron Microscopy, and Energy Dispersive X-ray were conducted. Stable QDs with fluorescence ranging from green to red (527.6 nm to 629.2 nm) were obtained. A statistical analysis of the results revealed that time and temperature were the most significant factors influencing λmax. After fine-tuning the variables, a mathematical model with 97.7% of prediction accurately forecasted experimental conditions for synthesizing TGA-CdTe QDs at predefined λmax. Stability tests demonstrated that the QDs retained their optical characteristics for over a month at 4 °C, facilitating diverse applications.

Details

Title
Controlling Fluorescence Wavelength in the Synthesis of TGA-Capped CdTe Quantum Dots
Author
Martins, Catarina S M 1   VIAFID ORCID Logo  ; Silva, Ana L 2 ; Luís Pleno de Gouveia 3   VIAFID ORCID Logo  ; Çaha, Ihsan 4   VIAFID ORCID Logo  ; Bondarchuk, Oleksandr 4 ; LaGrow, Alec P 4 ; Francis Leonard Deepak 4 ; Prior, João A V 2   VIAFID ORCID Logo 

 LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal; [email protected] (C.S.M.M.); ; International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal; [email protected] (I.Ç.); [email protected] (O.B.); [email protected] (A.P.L.); [email protected] (F.L.D.) 
 LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, nº 228, 4050-313 Porto, Portugal; [email protected] (C.S.M.M.); 
 Pharmacological and Regulatory Sciences Group (PharmaRegSci), Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisbon, Portugal; [email protected] 
 International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal; [email protected] (I.Ç.); [email protected] (O.B.); [email protected] (A.P.L.); [email protected] (F.L.D.) 
First page
70
Publication year
2024
Publication date
2024
Publisher
MDPI AG
e-ISSN
22279040
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3046766813
Copyright
© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.