在室温下开发水相硒化镉神奇尺寸团簇,在高温下开发量子点

IF 9.5 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Yao Jiang, Zhe Wang, Shasha Wang, Chunchun Zhang, Chaoran Luan, Xiaoqin Chen, Kui Yu
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引用次数: 0

摘要

人们对在水环境中合成胶体三元半导体魔法尺寸团簇(MSCs)和量子点(QDs)知之甚少。我们在此报告了首次在室温下合成水相 CdSeS MSC-380(在 ∼ 380 nm 处显示尖锐的光吸收峰值)和在高温下合成 QDs 的过程。反应物包括 CdCl2-2.5H2O、3-巯基丙酸(MPA,HS-(CH2)2-COOH)、硒脲(SeU,NH2-C(Se)-NH2)和硫代乙酰胺(TAA,CH3-C(S)-NH2)。在 QDs 成核和生长(N/G)之前,25 ℃ 下会形成团簇。成核前阶段的团簇是 CdSeS MSC-380 (PC-380)的前体化合物。PC 的光吸收相对透明;在伯胺丁胺(BTA,CH3-(CH2)3-NH2)的存在下,PC 转变为可吸收的 CdSeS MSC-380。80 °C 时,PC 下降,出现 CdSeS QD 的 N/G。本研究为三元 CdSeS MSCs 和 QDs 的水相合成铺平了道路,深入了解了 CdSeS QDs 成核前阶段的团簇形成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Development of aqueous-phase CdSeS magic-size clusters at room temperature and quantum dots at elevated temperatures

Development of aqueous-phase CdSeS magic-size clusters at room temperature and quantum dots at elevated temperatures

Little is known about the synthesis of colloidal ternary semiconductor magic-size clusters (MSCs) and quantum dots (QDs) in an aqueous environment. We report here the first synthesis of aqueous-phase CdSeS MSC-380 (displaying sharp optical absorption peaking at ∼ 380 nm) at room temperature and QDs at elevated temperatures. The reaction contains CdCl2·2.5H2O, 3-mercaptopropionic acid (MPA, HS–(CH2)2–COOH), selenourea (SeU, NH2–C(Se)–NH2), and thioacetamide (TAA, CH3–C(S)–NH2). Prior to the nucleation and growth (N/G) of QDs, there are clusters formed at 25 °C. The prenucleation-stage clusters are the precursor compound of CdSeS MSC-380 (PC-380). The PC is relatively transparent in optical absorption; in the presence of a primary amine butylamine (BTA, CH3–(CH2)3–NH2), the PC transforms to absorbing CdSeS MSC-380. At 80 °C, the PC decreases and the N/G of CdSeS QDs appears. The present study paves the way to the aqueous-phase synthesis of ternary CdSeS MSCs and QDs, providing an in-depth understanding of the cluster formation in the prenucleation stage of CdSeS QDs.

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来源期刊
Nano Research
Nano Research 化学-材料科学:综合
CiteScore
14.30
自引率
11.10%
发文量
2574
审稿时长
1.7 months
期刊介绍: Nano Research is a peer-reviewed, international and interdisciplinary research journal that focuses on all aspects of nanoscience and nanotechnology. It solicits submissions in various topical areas, from basic aspects of nanoscale materials to practical applications. The journal publishes articles on synthesis, characterization, and manipulation of nanomaterials; nanoscale physics, electrical transport, and quantum physics; scanning probe microscopy and spectroscopy; nanofluidics; nanosensors; nanoelectronics and molecular electronics; nano-optics, nano-optoelectronics, and nano-photonics; nanomagnetics; nanobiotechnology and nanomedicine; and nanoscale modeling and simulations. Nano Research offers readers a combination of authoritative and comprehensive Reviews, original cutting-edge research in Communication and Full Paper formats. The journal also prioritizes rapid review to ensure prompt publication.
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