Morphology-Tailored Gold Nanoraspberries Based on Seed-Mediated Space-Confined Self-Assembly

Yan Yu; Yujun Xie; Pan Zeng; Dai Zhang; Rongqing Liang; Wenxing Wang; Qiongrong Ou; Shuyu Zhang

doi:10.3390/nano9091202

Nanomaterials (Aug 2019)

Morphology-Tailored Gold Nanoraspberries Based on Seed-Mediated Space-Confined Self-Assembly

Yan Yu,
Yujun Xie,
Pan Zeng,
Dai Zhang,
Rongqing Liang,
Wenxing Wang,
Qiongrong Ou,
Shuyu Zhang

Affiliations

Yan Yu: Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology (MoE), and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Yujun Xie: Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology (MoE), and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Pan Zeng: Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology (MoE), and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Dai Zhang: Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology (MoE), and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Rongqing Liang: Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology (MoE), and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Wenxing Wang: Department of Chemistry and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
Qiongrong Ou: Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology (MoE), and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Shuyu Zhang: Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology (MoE), and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China

DOI: https://doi.org/10.3390/nano9091202
Journal volume & issue: Vol. 9, no. 9
p. 1202

Abstract

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Raspberry-like structure, providing a high degree of symmetry and strong interparticle coupling, has received extensive attention from the community of functional material synthesis. Such structure constructed in the nanoscale using gold nanoparticles has broad applicability due to its tunable collective plasmon resonances, while the synthetic process with precise control of the morphology is critical in realizing its target functions. Here, we demonstrate a synthetic strategy of seed-mediated space-confined self-assembly using the virus-like silica (V-SiO2) nanoparticles as the templates, which can yield gold nanoraspberries (AuNRbs) with uniform size and controllable morphology. The spikes on V-SiO2 templates serve dual functions of providing more growth sites for gold nanoseeds and activating the space-confined effect for gold nanoparticles. AuNRbs with wide-range tunability of plasmon resonances from the visible to near infrared (NIR) region have been successfully synthesized, and how their geometric configurations affect their optical properties is thoroughly discussed. The close-packed AuNRbs have also demonstrated huge potential in Raman sensing due to their abundant “built-in” hotspots. This strategy offers a new route towards synthesizing high-quality AuNRbs with the capability of engineering the morphology to achieve target functions, which is highly desirable for a large number of applications.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

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