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Cdse Quantum Dot - Astrophysics Data System

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Last Updated: 28 January 2023

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Bright Fluorophores in the Second Near-Infrared Window: HgSe/CdSe Quantum Dots

However, new fluorophores exhibit poor emission with quantum yields below 2% in aqueous solvents, leading to poor combustion with quantum yields below 2%. We report the synthesis of HgSe/CdSe core/shell quantum dots emitting at 1. 7 microns during the interband transition in this paper. A simulation of Forster resonance energy transfer to ligands and solvent molecules is a key to the quantum yields of our QDs and other reported QDs. When these HgSe/CdSe QDs are solubilized in water, the model expects a quantum yield of > 6%.

Source link: https://ui.adsabs.harvard.edu/abs/2023arXiv230110364K/abstract


Fӧrster resonance energy transfer (FRET) between CdSe quantum dots and ABA phosphorus(V) corroles

In this paper, highly fluorescent phosphorus corrole was synthesized, and then combined with CdSe quantum dots in order to investigate the FUT's energy transfer mechanism between CdSe QDs and phosphorus corrole. The chemical correlation between QD's emission profile and corrole's absorption profile was discovered to be strong enough to result in F1's energy transfer. Clearly, the absorption bands on the addition of phosphorus corrole to CdSe QDs, implying QD-corrole conjugation, were raised in the absorption bands. In the steady state fluorescence analysis, emission spectrum revealed quenching in the fluorescence intensity of prepared CdSe QDs with the addition of phosphorus corrole.

Source link: https://ui.adsabs.harvard.edu/abs/2023AcSpA.29122345K/abstract


A ratiometric fluorescent nanoprobe based on CdSe quantum dots for the detection of Ag + in environmental samples and living cells

Ag +'s potential risks to both the environment and humans have sparked significant questions with widespread use of Ag + in modern life and industry. When Ag+ exists, a rising peak appeared at 650 nm and the emission at 510 nm decreased, signaling a steady response to a linear response to a linear range of 0. 01-4 bcM. In addition, the sensing assay can be used to detect Ag + in real water samples and living cells.

Source link: https://ui.adsabs.harvard.edu/abs/2023AcSpA.29022302Z/abstract


Intracellular Biosynthesis of Fluorescent CdSe Quantum Dots in Bacillus subtilis: A Strategy to Construct Signaling Bacterial Probes for Visually Detecting Interaction Between Bacillus subtilis and Staphylococcus aureus

The first biological step of coupling intracellular biochemical reactions for controlled biosynthesis of CdSe quantum dots by living B. subtilis cells was demonstrated by an intuitive fluorescent B. subtilis cells, which was obtained with high lumint and photostable fluorescent B. subtilis cells. S. aureus cells responded to co-cultured B. subtilis and aggregate with the help of the retrieved fluorescent B. subtilis cells probes. Both the growth stage and the amount of surrounding B. subtilis cells affected the proliferation of neighboring S. aureus cells, and this inhibition was exacerbated by both the growth stage and the number of surrounding B. subtilis cells.

Source link: https://ui.adsabs.harvard.edu/abs/2016MiMic..22...13Y/abstract


Study on third-order nonlinear optical properties of the composite films with Ag nanoparticles and CdSe quantum dots

All the composite films exhibit SA at 300nj laser energy. However, the composite films' nonlinear absorption and refractive indexes were both reduced when the number of CdSe quantum dots increased. In addition, the CdSe/PMMA/Ag composite films' third-order nonlinear polarization index is ten times higher when compared to those of the CdSe/Al 2 O 3 / Ag composite films' third-order nonlinear polarization index, which is about ten times higher. Composite films can be used in many aspects of signal processing, as well as in photonics and optoelectronic applications.

Source link: https://ui.adsabs.harvard.edu/abs/2020OptMa..9909569L/abstract


The constructive role of ZnSe passivating layer on the photovoltaic performance of the fast-fabricated CdS/CdSe quantum dot sensitized solar cells

Quantum dot sensitized solar cells were manufactured in this study, and the photovoltaic performance was enhanced. Through the typical successive ionic layer adsorption and reaction technique, the nanocrystalline TiO 2 scaffold was deposited on a nanocrystalline TiO 2 scaffold. By an improved, fast, and cost-effective chemical bath deposition technique, the CdSe nanocrystals film was also over-coated. With the electrolyte, this electron blocking layer could decrease the back-recombination rate of electrons. During the deposition, the ZnSe over-layer was produced by a controlled SILAR process, but the Se source was well protected against under the Ar gas flow. The optimized cell with a ZnSe passivation layer applied in three separate SILAR cycles had a J sc of 17. 7 mA/cm 2, with a V oc of 594 mV, FF of 0. 5, and maximum power conversion efficiency of 5. 3%.

Source link: https://ui.adsabs.harvard.edu/abs/2020OptMa.10509918M/abstract


CdSe quantum dot formation induced by electron beam irradiation

The growth of quantum dots stimulated by electron beam irradiation onto a tightly bound CdSe layer on ZnSe is investigated. Both in height and lateral directions, Electron beam irradiation increases QD size, resulting in the change of emission from green to yellow spectral region.

Source link: https://ui.adsabs.harvard.edu/abs/2023JaJAP..62a0903A/abstract


Size-dependent energy spacing and surface defects of CdSe quantum dots in strong confinement regime

Transmission electron microscopy and UV-Vis spectroscopy can be used to investigate individual crystallite morphology and quantum dots' optical activity. The CdSe QDs with different sizes were obtained by controlling their expansion time, and the estimated CdSe QDs ranged from 2. 5 to 5. 1 nm. In addition, time-resolved PL spectra in conjunction with surface characterization findings showed that the PL behavior can be explained by the additional contribution of electron-phonon interaction.

Source link: https://ui.adsabs.harvard.edu/abs/2022ApNan..12.3297K/abstract


Visible-Light-Stimulated Synaptic Phototransistors Based on CdSe Quantum Dot/In-Ga-Zn-O Hybrid Channels

Because of their versatile bandwidths, low power consumption, and superior parallelism, light-stimulated synaptic devices are promising candidates for artificial intelligence systems' development. The improved charge separation efficiency raises the photoelectric properties dramatically, while the photocurrent's deposition of photoelectric synaptic phenomena led to the discovery of photoelectric synaptic behaviors. This simple and cost-effective method of fabricating light-stimulated phototransistors can spur new research advances into the development of artificial intelligence systems.

Source link: https://ui.adsabs.harvard.edu/abs/2022NRL....17..102F/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions