Synthesis of CdSeS Nanocrystals in Coordinating and Noncoordinating Solvents:  Solvent's Role in Evolution of the Optical and Structural Properties

Al-Salim, Najeh; Young, Aidan G.; Tilley, Richard D.; McQuillan, A. James; Xia, J.

doi:10.1021/cm070818k

Cited by 104 publications

(100 citation statements)

References 76 publications

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“…The PL emission of ternary alloyed QDs (e.g., CdSe x Te 1-x , CdS x Se 1-x , Cd x Zn 1-x S, Cd 1-x Zn x Se) can be varied while maintaining a constant size (Fig. 1D), [51][52][53][54][55][56] and these materials are also commercially available.…”

Section: Quantum Dot Materialsmentioning

confidence: 99%

Quantum Dots in Bioanalysis: A Review of Applications across Various Platforms for Fluorescence Spectroscopy and Imaging

2013

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Semiconductor quantum dots (QDs) are brightly luminescent nanoparticles that have found numerous applications in bioanalysis and bioimaging. In this review, we highlight recent developments in these areas in the context of specific methods for fluorescence spectroscopy and imaging. Following a primer on the structure, properties, and biofunctionalization of QDs, we describe select examples of how QDs have been used in combination with steady-state or time-resolved spectroscopic techniques to develop a variety of assays, bioprobes, and biosensors that function via changes in QD photoluminescence intensity, polarization, or lifetime. Some special attention is paid to the use of Förster resonance energy transfer-type methods in bioanalysis, including those based on bioluminescence and chemiluminescence. Direct chemiluminescence, electrochemiluminescence, and charge transfer quenching are similarly discussed. We further describe the combination of QDs and flow cytometry, including traditional cellular analyses and spectrally encoded barcode-based assay technologies, before turning our attention to enhanced fluorescence techniques based on photonic crystals or plasmon coupling. Finally, we survey the use of QDs across different platforms for biological fluorescence imaging, including epifluorescence, confocal, and twophoton excitation microscopy; single particle tracking and fluorescence correlation spectroscopy; super-resolution imaging; near-field scanning optical microscopy; and fluorescence lifetime imaging microscopy. In each of the above-mentioned platforms, QDs provide the brightness needed for highly sensitive detection, the photostability needed for tracking dynamic processes, or the multiplexing capacity needed to elucidate complex systems. There is a clear synergy between advances in QD materials and spectroscopy and imaging techniques, as both must be applied in concert to achieve their full potential.

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Section: Quantum Dot Materialsmentioning

confidence: 99%

Quantum Dots in Bioanalysis: A Review of Applications across Various Platforms for Fluorescence Spectroscopy and Imaging

2013

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“…The reported quantum yields of the CdS x Se 1Àx nanoalloys vary from 3 to 85% depending on the synthesis methods. 10,[12][13][14][15] It was reported that the structural disorder induced by the excessive sulfur incorporated into the alloy reduced the quantum yield. 30 But, the disorder was not imaged even when the Z-STEM technique was exploited.…”

Section: The Optical Properties Of the Nanoalloysmentioning

confidence: 99%

Developing a facile method for highly luminescent colloidal CdSxSe1−x ternary nanoalloys

et al. 2013

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“…A slow cooling rate results in large size disparities due to Ostwald ripening after the microwave power is removed. [29,30] Therefore, to reduce the influence of the cooling rate on the material properties, compressed air was used to cool the microwave cavity. Figure 3 shows UV/Vis absorption and the PL spectra of CdSe QDs obtained at different reaction times, but with the same growth temperature and power.…”

mentioning

confidence: 99%

Controlled Synthesis of CdSe Quantum Dots by a Microwave‐Enhanced Process: A Green Approach for Mass Production

Ayele

Chen

et al. 2011

Chemistry A European J

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A method that does not employ hot-injection techniques has been developed for the size-tunable synthesis of high-quality CdSe quantum dots (QDs) with zinc blende structure. In this environmentally benign synthetic route, which uses less toxic precursors, solvents, and capping ligands, CdSe QDs that absorb visible light are obtained. The size of the as-prepared CdSe QDs and thus their optical properties can be manipulated by changing the microwave reaction conditions. The QDs were characterized by XRD, TEM, UV/Vis, FTIR, time-resolved fluorescence spectroscopy, and fluorescence spectrophotometry. In this approach, the reaction is conducted in open air and at a much lower temperature than in hot-injection techniques. The use of microwaves in this process allows for a highly reproducible and effective synthesis protocol that is fully adaptable for mass production and can be easily employed to synthesize a variety of semiconductor QDs with the desired properties. Possible applications of the CdSe QDs were assessed by deposition on TiO(2) films.

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Synthesis of CdSeS Nanocrystals in Coordinating and Noncoordinating Solvents: Solvent's Role in Evolution of the Optical and Structural Properties

Cited by 104 publications

References 76 publications

Quantum Dots in Bioanalysis: A Review of Applications across Various Platforms for Fluorescence Spectroscopy and Imaging

Quantum Dots in Bioanalysis: A Review of Applications across Various Platforms for Fluorescence Spectroscopy and Imaging

Developing a facile method for highly luminescent colloidal CdSxSe1−x ternary nanoalloys

Controlled Synthesis of CdSe Quantum Dots by a Microwave‐Enhanced Process: A Green Approach for Mass Production

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