Facile synthesis of CdTe-based quantum dots promoted by mercaptosuccinic acid and hydrazine

Tan, Jiawei; Yan, Liang; Wang, Jie‐Xin; Chen, Jianfeng; Sun, Baochang; Shao, Lei

doi:10.1039/c5nj00075k

Cited by 18 publications

(16 citation statements)

References 47 publications

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“…Tan et al 339 grew both CdTe and CdSe x Te 1−x alloyed QDs through aqueous synthesis with mercaptosuccininc acid, CdCl 2 , and Na 2 TeO 3 /Na 2 SeO 3 , and N 2 H 4 . The metal salt and ligand were dissolved in a slightly alkaline solution (pH 8) and mixed with a solution of the chalcogen precursors, along with a proportion of NaBH 4 to reduce the tellurite/selenite.…”

Section: Chemical Reviewsmentioning

confidence: 99%

Aqueous Based Semiconductor Nanocrystals

et al. 2016

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This review summarizes traditional and recent nonconventional, bioinspired, methods for the aqueous synthesis of colloidal semiconductor quantum dots (QDs). The basic chemistry concepts are critically emphasized at the very beginning as these are strongly correlated with the selection of ligands and the optimal formation of aqueous QDs and their more sophisticated structures. The synergies of biomimetic and biosynthetic methods that can combine biospecific reactivity with the robust and strong optical responses of QDs have also resulted in new approaches to the synthesis of the nanoparticles themselves. A related new avenue is the recent extension of QD synthesis to form nanoparticles endowed with chiral optical properties. The optical characteristics of QD materials and their advanced forms such as core/shell heterostructures, alloys, and doped QDs are discussed: from the design considerations of optical band gap tuning, the control and reduction of the impact of surface traps, the consideration of charge carrier processes that affect emission and energy and charge transfer, to the impact and influence of lattice strain. We also describe the considerable progress in some selected QD applications such as in bioimaging and theranostics. The review concludes with future strategies and identification of key challenges that still need to be resolved in reaching very attractive, scalable, yet versatile aqueous syntheses that may widen the scope of commercial applications for semiconductor nanocrystals.

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Section: Chemical Reviewsmentioning

confidence: 99%

Aqueous Based Semiconductor Nanocrystals

et al. 2016

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“…Typically, for instance, the synthesis of CdTe QDs in an aqueous solution was based on the reaction between Cd 2+ and NaHTe and required reflux at 96 °C for hours to obtain the photoluminescence emission . Thereafter, the aqueous synthesis of II–VI QDs, such as CdTe, , CdSe, HgTe, CdHgTe, , and PbS, has been extensively studied and several improvements of the aqueous synthetic method have been reported including hydrothermal synthesis, microwave irradiation, and ultrasonic treatment . For instance, very recently, Yakoubi et al reported a facile, mild, and low cost aqueous-based synthesis for the production of high quality CdZnS and Cu-doped CdZnS QDs.…”

Section: Synthetic Approaches In Batch Reactorsmentioning

confidence: 99%

Colloidal Synthesis of Semiconductor Quantum Dots toward Large-Scale Production: A Review

Cai

Wang

et al. 2018

Ind. Eng. Chem. Res.

263

166

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The development of green synthetic approaches is one of the key materials challenges in moving toward semiconductor quantum dots (QDs) for large-scale production and commercial applications. This article presents a comprehensive overview on the synthesis of colloidal QDs prepared via chemical approaches in solution phase, with emphasis on green routes which possess the advantages of environment-friendly raw materials, simple operation process, and robust mass-scale production. The approaches for the synthesis of QDs in batch reactors are summarized, including hot-injection organometallic synthesis, noninjection organometallic synthesis, aqueous synthesis and biosynthesis approaches, with some of the concerns on their limitations for scale-up, followed by some continuous synthetic methods aiming for reproducible and large-scale production. Current advances in continuous synthesis of QDs by microfluidic devices, high-gravity reactors, and spray-based techniques are briefly introduced. We also provide some insights into challenges and opportunities based on our own understanding of this field.

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“…The liquid-phase synthesis method can be further categorized into biosynthesis, 127,128 noninjection organometallic synthesis, 129,130 hotinjection organometallic synthesis, 131,132 and aqueous synthesis. 133,134 These methods can provide the following advantages over the epitaxial growth technique: (i) control of the shape, size, and framework of the QDs; (ii) modification of the functionality and solubility of the QDs by ligand exchange; (iii) solvent processability accelerates the economic deposition techniques and device fabrication. 24 Nevertheless, the drawbacks of liquid-phase synthesis methods, such as their slow precursor mixing, heating, cooling, low productivity, and poor reproducibility, limit the large-scale synthesis of QDs.…”

Section: Microfluidic Synthesis Techniquementioning

confidence: 99%

Microfluidic Synthesis of Semiconducting Colloidal Quantum Dots and Their Applications

Kubendhiran

Bao²,

Dave

et al. 2019

ACS Appl. Nano Mater.

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The large-scale synthesis of high-quality quantum dots (QDs) for commercial applications, such as lighting, displays, and biomedical devices, is an urgent necessity. Batch reactor systems present a number of problems, such as improper mixing, heating, and reagent addition. Hence, controlling the growth and size of nanocrystals is difficult in this type of system. A number of microfluidic techniques have been developed to enable semiconductor colloidal QD synthesis. The reaction parameters of these techniques are controlled precisely during synthesis. Over the last 16 years, many advancements have been introduced to achieve products similar to those obtained from batch systems. Multiphase flow reactors reduce reactor fouling by using immiscible carrier liquids, which decrease the contact between reagents and the channel wall. Online monitoring of the nanocrystal growth through absorbance and fluorescence spectrometry provides detailed information on the reaction parameters. Chip-based reactors with subchannels decrease backflow and control the addition of reagents. In this review, we discuss all aspects and developments in microfluidic systems for the production and applications of QDs.

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Facile synthesis of CdTe-based quantum dots promoted by mercaptosuccinic acid and hydrazine

Abstract: High-quality CdTe and CdSexTe1−x QDs were prepared at 95 °C within 45 minutes with the sizes controlled by N2H4 concentration.

Cited by 18 publications

References 47 publications

Aqueous Based Semiconductor Nanocrystals

Aqueous Based Semiconductor Nanocrystals

Colloidal Synthesis of Semiconductor Quantum Dots toward Large-Scale Production: A Review

Microfluidic Synthesis of Semiconducting Colloidal Quantum Dots and Their Applications

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