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Preparation and plasmon resonance properties of Au nanorods and Aunanorods@SiO2

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Abstract

Au nanorods were prepared through seed growth method. Their lengths and diameters were controlled by adjusting Ag+ content in the growth solution. Ethyl orthosilicate were hydrolyzed in alkali solutions to obtain SiO2-coated Au nanostructures. Au nanorods with ideal morphologies and sizes could only be obtained under the presence of a certain Ag+ concentration in the growth solution. Without Ag+, only some irregular nanoparticles were generated without nanorods. Longitudinal plasma absorption of Au nanorods shifts first to red shift and then to blue with the increase of Ag+ in the growth solution, while transverse plasma absorption hardly changes. However, longitudinal plasma absorption of silica-coated Au nanorods has a blue shift with the increase of the thickness of silica, while the transverse plasma has a slight red shift. Therefore, by coating Au nanorods with silica and by adjusting their aspect ratio by using different Ag+ concentration in the growth solution, Au nanoparticles can be synthesized for applications requiring absorption in specific UV regions.

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Funding

This work was supported by The Natural Science Foundation of National Natural Science Foundation of China (51702006), Shaanxi Education Department Project (17JS009), Ph.D. Research Project of Baoji University of Arts And Sciences (ZK2017027), the Doctoral Scientific Research Foundation of East China University of Technology (DHBK2018039), and the Project of Educational Commission of Jiangxi Province of China (GJJ180408).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, 721013, Shaanxi Province, China

    Li-qing Meng, Hui-qin Li, Wei-wei Zhao & Zong-xiao Li

  2. Xi’An Traffic Engineering Institute, Xian, 710300, Shaanxi Province, China

    Zong-xiao Li

  3. Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang, 330013, Jiangxi Province, China

    Chong Lin

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  1. Li-qing Meng
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Correspondence to Zong-xiao Li.

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Meng, Lq., Li, Hq., Zhao, Ww. et al. Preparation and plasmon resonance properties of Au nanorods and Aunanorods@SiO2. Gold Bull 53, 31–37 (2020). https://doi.org/10.1007/s13404-020-00271-4

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  • DOI: https://doi.org/10.1007/s13404-020-00271-4

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