电子束辐照下金纳米颗粒在二氧化硅气凝胶中的聚结

IF 1.4 4区材料科学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Current Nanoscience Pub Date : 2023-11-01 DOI:10.2174/1573413719666221122123805

Heena Sammi, Neha Sardana, Manish Mohanta, Bhagwati Sharma

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引用次数: 0

摘要

背景:利用透射电镜电子束辐照观察了嵌入硅胶基体中的金纳米颗粒的聚结过程。方法:观察纳米颗粒掺入基质后，颗粒间距减小，颗粒相互靠近。TEM研究表明，在电子束辐照过程中，~13 nm的Au纳米颗粒随着二氧化硅气凝胶的收缩或表面活性剂层的去除而相互接触，并根据颗粒间的间隙转变为不同形状的颗粒，如哑铃状颗粒和链状颗粒。结果:该纳米颗粒-气凝胶基质在传感、非线性光学和催化等领域具有潜在的应用前景。结论:本研究加深了对二氧化硅气凝胶和电子束辐照在纳米颗粒聚并中的作用的认识。

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Coalescence of Au Nanoparticles in Silica Aerogel under Electron Beam Irradiation

Background: The coalescence of Au nanoparticles embedded in the silica gel matrix was observed by E-beam irradiation in a transmission electron microscope. Methods: It was examined that interparticle spacing between nanoparticles was reduced after incorporation into the matrix and particles came close to each other. TEM studies have shown that during E-beam irradiation ~13 nm Au nanoparticles contacted with each other along with the shrinkage of the silica aerogel or as well as the removal of surfactant layer, and transformed into different shapes of particles such as dumbbell and chain-like particles as per the interparticle gap. Results: This nanoparticle-aerogel matrix has the potential for applications in sensing, nonlinear optics, and catalysis. Conclusion: This work enhances the understanding of the role of silica aerogel and E-beam irradiation in directing the coalescence of nanoparticles.

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来源期刊

Current Nanoscience 工程技术-材料科学：综合

CiteScore

3.50

自引率

6.70%

发文量

审稿时长

4.4 months

期刊介绍： Current Nanoscience publishes (a) Authoritative/Mini Reviews, and (b) Original Research and Highlights written by experts covering the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano-structures, nano-bubbles, nano-droplets and nanofluids. Applications of nanoscience in physics, material science, chemistry, synthesis, environmental science, electronics, biomedical nanotechnology, biomedical engineering, biotechnology, medicine and pharmaceuticals are also covered. The journal is essential to all researches involved in nanoscience and its applied and fundamental areas of science, chemistry, physics, material science, engineering and medicine. Current Nanoscience also welcomes submissions on the following topics of Nanoscience and Nanotechnology: Nanoelectronics and photonics Advanced Nanomaterials Nanofabrication and measurement Nanobiotechnology and nanomedicine Nanotechnology for energy Sensors and actuator Computational nanoscience and technology.