Characterization of l-cysteine capped CdTe quantum dots and application to test Cu(II) deficiency in biological samples from critically ill patients

Sáez, Laura; Molina, J. C.; Florea, Daniela; Planells, Elena; Cabeza, M. Carmen; Quintero, B.

doi:10.1016/j.aca.2013.04.060

Cited by 10 publications

(2 citation statements)

References 82 publications

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“…Quantum dots(QDs) have been extensively applied in electronic devices 1 and solar cell 2 , particularly in the recent years, many researchers committed to synthesize QDs with properties of water-solubility, narrow emission spectra and high fluorescence intensity and low toxicity, served as biomarkers 3 in biology and medicine and a fluorescent probe to detect heavy metal in analysis 4 , 5 . Due to their high stability, low toxicity and unique properties, copper(I) sulfide(Cu 2 S) nanoparticles(NPs) are attracting increasing attention from researchers.…”

Section: Introductionmentioning

confidence: 99%

Aqueous synthesis of functionalized copper sulfide quantum dots as near-infrared luminescent probes for detection of Hg2+, Ag+ and Au3+

Liao

Yang

et al. 2017

Sci Rep

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Stable water-soluble copper sulfide(Cu2S) quantum dots(QDs) with near-infrared emission were synthesized using N-acetyl-L-cysteine(NAC) as a modifier in aqueous solution and nitrogen atmosphere at room temperature. The product was characterized by TEM, XRD, XPS, FT-IR, FL and UV-VIS spectrometers. Effects of preparation conditions such as pH values, the molar ratio of reactants, temperature, and metal ions on the fluorescence properties of Cu2S QDs were discussed. Under optimal conditions, the prepared Cu2S QDs with average diameter about 2–5 nm show a near-infrared emission at 770 nm with the excitation wavelength of 466 nm, and have a good detection sensitivity for ions of Hg2+, Ag+ and Au3+, based on the characteristic of fluorescence quenching. The fluorescence quenching mechanism was proposed via electron transfer with cation exchange, which based on the theory of Hard-Soft-Acid-Base (HSAB) and Ksp value of metal–sulfide.

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Section: Introductionmentioning

confidence: 99%

Aqueous synthesis of functionalized copper sulfide quantum dots as near-infrared luminescent probes for detection of Hg2+, Ag+ and Au3+

Liao

Yang

et al. 2017

Sci Rep

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“…The extensive research and applications of nanoparticles (NPs) and quantum dots (QDs), particularly in solar cells and electronic devices in recent decades, have prompted many scientists to develop QDs with properties such as high intensity fluorescence, narrow emission, water solubility, and low toxicity. They are also employed in medicine, the detection of heavy metals, and biology as biomarkers [1][2][3][4][5]. These extensive attractions are due to their size-tunable properties, which are achieved by the quantum confinement effect and a decrease in particle size as a result of an increase in the surface-to-volume ratio [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of a One-Pot Approach on a Prepared CuS Macro/Nanostructure from Various Molecular Precursors

Agoro

Meyer

2023

Inorganics

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Nanostructured metal sulfides such as copper sulfide (CUS) form from single-source precursors (SSPs) and are cost-friendly materials that can be used in a one-pot approach with potential applications in dye-sensitizer solar cells (DSCs). This is an attractive pathway that allows the careful control of tailoring the design of the nanostructures with slight variations in the mixture conditions to form uniform nanoparticles and enhance the performance of DSCs. We report on the optical, structural, and morphological properties of CuS as photosensitizers and their application in QDSCs using characterization techniques such as cyclic voltammetry (CV), current–voltage (I-V), UV-Vis spectroscopy (UV-Vis), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), etc. The UV-Vis reveals that the band gap for the three samples is found at 2.05–2.87 eV, confirming them as suitable materials for solar cells. The XRD peaks for the three CuS nanoparticles harmonized very well with hexagonal CuS. The thermal gravimetric (TGA) suitability of the three complexes shows a two-step decomposition within the temperature range of 125–716 °C, with a final residue of 2–4%. CV curves for three samples show that none of the developed metal sulfides exhibits a peak indicative of limited catalytic activity in the iodine electrolyte. The I-V overall energy conversion efficiency (η%) of 4.63% for the CuSb photosensitizer is linked to the wide electronic absorption spectrum and better relative dye loading. The synthesis of photosensitizers from a trioctylphosphine oxide (TOPO) capping agent shows improved efficiency compared to our previous studies, which used hexadecylamine as a coordinating solvent.

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Fluorescent detection of chlorpyrifos using Mn(II)-doped ZnS quantum dots coated with a molecularly imprinted polymer

2014

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Characterization of l-cysteine capped CdTe quantum dots and application to test Cu(II) deficiency in biological samples from critically ill patients

Cited by 10 publications

References 82 publications

Aqueous synthesis of functionalized copper sulfide quantum dots as near-infrared luminescent probes for detection of Hg2+, Ag+ and Au3+

Aqueous synthesis of functionalized copper sulfide quantum dots as near-infrared luminescent probes for detection of Hg2+, Ag+ and Au3+

Influence of a One-Pot Approach on a Prepared CuS Macro/Nanostructure from Various Molecular Precursors

Fluorescent detection of chlorpyrifos using Mn(II)-doped ZnS quantum dots coated with a molecularly imprinted polymer

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