Journal ArticleDOI
Electrogenerated Chemiluminescence of CdSe Nanocrystals
TLDR
In this article, a solution of monodisperse nanocrystals with an absorption maximum at 537 nm was synthesized at 330 °C using TOPO (trioctylphosphineoxide) and TOP (tioctyl phosphine) as capping agents and Cd-acetate and Se powder as precursors.Abstract:
Electrogenerated chemiluminescence (ECL) was observed from TOPO-capped CdSe nanocrystals dissolved in CH2Cl2 containing 0.1 M TBAP. The solution of monodisperse nanocrystals with an absorption maximum at 537 nm was synthesized at 330 °C using TOPO (trioctylphosphineoxide) and TOP (trioctylphosphine) as capping agents and Cd-acetate and Se powder as precursors. The photoluminescence (PL) spectrum showed an emission maximum at 545 nm. Cyclic voltammetry and differential pulse voltammetry of this solution displayed no distinctive features, but light emission was observed through the annihilation of oxidized and reduced forms electrogenerated during cyclic potential scans or steps. The oxidized species was somewhat more stable than the reduced form. The ECL spectrum was substantially red shifted by ∼200 nm from the PL spectrum, suggesting that surface states play an important role in the emission process.read more
Citations
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Carbon nanodots: synthesis, properties and applications
TL;DR: In this article, a review of the photo and electron properties of carbon nanodots is presented to provide further insight into their controversial emission origin and to stimulate further research into their potential applications, especially in photocatalysis, energy conversion, optoelectronics, and sensing.
Journal ArticleDOI
Electrogenerated Chemiluminescence and Its Biorelated Applications
TL;DR: ECL has now become a very powerful analytical technique and been widely used in the areas of immunoassay, food and water testing, and biowarfare agent detection and has also been successfully exploited as a detector of flow injection analysis (FIA), high-performance liquid chromatography (HPLC), capillary electrophoresis, and micro total analysis (μTAS).
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Focusing on luminescent graphene quantum dots: current status and future perspectives
TL;DR: In this review, the state-of-the-art knowledge of GQDs is presented, with emphasis on the top-down routes which possess the advantages of abundant raw materials, large scale production and simple operation.
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Microwave synthesis of fluorescent carbon nanoparticles with electrochemiluminescence properties
TL;DR: A facile, economical microwave pyrolysis approach is presented to synthesize fluorescent carbon nanoparticles with electrochemiluminescence properties and it is shown that this approach can be economical and scalable.
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Applications and trends in electrochemiluminescence.
Lianzhe Hu,Guobao Xu +1 more
TL;DR: This critical review presents the active and/or emerging areas of ECL research as well as new applications and phenomena of ECR, such as light-emitting electrochemical cell, wireless electrochemical microarray, and single molecule detection.
References
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Journal ArticleDOI
Semiconductor Clusters, Nanocrystals, and Quantum Dots
TL;DR: In this article, the authors focus on the properties of quantum dots and their ability to join the dots into complex assemblies creates many opportunities for scientific discovery, such as the ability of joining the dots to complex assemblies.
Journal ArticleDOI
Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites
TL;DR: In this paper, a simple route to the production of high-quality CdE (E=S, Se, Te) semiconductor nanocrystallites is presented, based on pyrolysis of organometallic reagents by injection into a hot coordinating solvent.
Journal ArticleDOI
Quantum Dot Bioconjugates for Ultrasensitive Nonisotopic Detection
Warren C. W. Chan,Shuming Nie +1 more
TL;DR: Highly luminescent semiconductor quantum dots (zinc sulfide-capped cadmium selenide) have been covalently coupled to biomolecules for use in ultrasensitive biological detection and these nanometer-sized conjugates are water-soluble and biocompatible.
Journal ArticleDOI
Hybrid Nanorod-Polymer Solar Cells
TL;DR: It is demonstrated that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers and Tuning the band gap by altering the nanorod radius enabled us to optimize the overlap between the absorption spectrum of the cell and the solar emission spectrum.
Journal ArticleDOI
Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
TL;DR: In this article, solution phase syntheses and size-selective separation methods to prepare semiconductor and metal nanocrystals, tunable in size from ∼1 to 20 nm and monodisperse to ≤ 5%, are presented.