Ultraprecise control over the photophysical properties of novel amino acid functionalized CdTeS quantum dots and their effect on the emission of yellow-emissive carbon dots

Kestir, Sacide Melek; Keskin, Sultan Şahin; Ergüder, Özge; Ük, Nida; Türker, Yurdanur; Nar, Ilgın; Trabzon, Levent; Ünlü, Caner

doi:10.1039/d3dt00019b

Cited by 4 publications

(9 citation statements)

References 35 publications

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“…The two-phase synthesis method was chosen as the preferred approach to synthesize the QDs due to two primary reasons (Ünlü 2019 ; Güleroglu and Ünlü 2021 ; Kestir et al 2023 ). Firstly, the ternary QDs synthesized through two-phase synthesis method exhibit a heterogeneous-gradient structure, with a core enriched in Se or Te, and an outer region rich in S (Ünlü 2019 ; Güleroglu and Ünlü 2021 ; Kestir et al 2023 ). This unique structure contributes to a high photoluminescence quantum yield (PQY).…”

Section: Discussionmentioning

confidence: 99%

“…This unique structure contributes to a high photoluminescence quantum yield (PQY). Secondly, the synthesis process employs mild conditions, such as low temperatures and less toxic cadmium precursors (Ünlü 2019 ; Güleroglu and Ünlü 2021 ; Kestir et al 2023 ).…”

Section: Discussionmentioning

confidence: 99%

“…The XRD peaks of the QDs had broad peaks at observed angles, indicating the nano-size nature of QDs (Ünlü 2019 ; Güleroglu and Ünlü 2021 ; Kestir et al 2023 ). The size of the QDs was determined using the Scherrer rule, resulting in dimensions of 2.4 nm for CdSeS, 2.7 nm for CdTeS, and 3.2 nm for S-rich CdTeS, which were also in agreement with TEM results of each QD.…”

Section: Discussionmentioning

confidence: 99%

“…Following a method outlined in the literature (Ünlü 2019 ; Kestir et al 2023 ), 0.4 mol of NaBH 4 was dissolved in 10 mL of distilled water under N 2 gas. A glass syringe was used to add saturated distilled water to 0.08 mmol of Te, which had been degassed with N 2 atmosphere in a beaker for 15 min.…”

Section: Methodsmentioning

confidence: 99%

“…Te-rich CdTeS QDs were synthesized using the liquid–liquid interface method (Kestir et al 2023 ). The organic liquid phase was prepared by slowly adding 5 mmol of oleic acid drop by drop to 0.111 g of cadmium myristate (Cd-Mry) in 50 mL of toluene.…”

Section: Methodsmentioning

confidence: 99%

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Modulating spectral response of raw photosynthetic pigments via ternary cadmium chalcogenide quantum dots: simultaneous enhancement at green spectrum and inhibition at UV region

Aykut,

Ük,

Coşkun

et al. 2024

Photosynth Res

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Photosynthesis relies on the absorption of sunlight by photosynthetic pigments (PPs) such as chlorophylls and carotenoids. While these pigments are outstanding at harvesting light, their natural structure restricts their ability to harvest light at specific wavelengths. In this study, Oleic acid-capped CdSeS and CdTeS ternary quantum dots (QDs) were synthesized using a novel two-phase synthesis method. Then, these QDs were used to interact with raw PPs, a mixture of chlorophylls and carotenoids isolated from spinach. Our findings revealed the following: (1) Interacting QDs with raw PPs effectively inhibited the chlorophyll fluorescence of the pigments upon excitation in UV light region (250–400 nm) without causing any damage to their structure. (2) By forming an interaction with QDs, the chlorophyll fluorescence of raw PPs could be induced through excitation with green-light spectrum. (3) The composition of the QDs played a fundamental role in their interaction with PPs. Our study demonstrated that the photophysical properties of isolated PPs could be modified by using cadmium-based QDs by preserving the structure of the pigments themselves.

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