配体稳定的纳米硅：高能质子束对发光特性的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-31 DOI:10.1002/sia.7354

Leonid A. Aslanov, Vladimir B. Zaitsev, Valery N. Zakharov, Igor K. Kudryavtsev, Vladimir M. Senyavin, Petr B. Lagov, Elena P. Romanteeva

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引用次数: 0

摘要

采用自下而上的化学方法合成了以氮杂环碳化物（NHC）和丁基为稳定配体的硅纳米粉体。利用透射电子显微镜（TEM）获得了平均直径为 1.8-2.5 纳米的纳米颗粒粒度分布。研究了样品的光学特性（光致发光[PL]和红外[IR]吸收光谱）。两种情况下的聚光光谱变化略有不同，但总的来说，我们可以看到发光振幅随着通量的增长而降低，最高可达 4-1014 cm-2，这主要发生在 NHC 稳定的纳米硅上。通过联合使用聚光光谱和红外光谱分析，讨论了辐射诱导纳米硅样品光学特性变化的主要机制。

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Nanosilicon Stabilized With Ligands: Effect of High‐Energy Proton Beam on Luminescent Properties

Silicon nanopowders with nitrogen heterocyclic carbene (NHC) and butyl as stabilizing ligands were synthesized by bottom‐up chemical methods. Transmission electron microscopy (TEM) was used to obtain nanoparticle size distribution with 1.8–2.5‐nm average diameter. Optical characteristics (photoluminescence [PL] and infrared [IR] absorption spectra) of samples were investigated as fabricated and on different steps of irradiation by high‐energy 22.5‐MeV protons. The PL spectral changes are slightly different for two cases, but in general, we can see a decrease in luminescence amplitude with fluence growth up to 4·1014 cm−2, mainly for NHC‐stabilized nanosilicon. Main mechanisms of radiation‐induced changes in nanosilicon sample optical properties are discussed by the joint use of PL and IR spectra analysis.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.