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Volume 12
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10.3390/nano12234232
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Article

Multifunctional Plasmon-Tunable Au Nanostars and Their Applications in Highly Efficient Photothermal Inactivation and Ultra-Sensitive SERS Detection

by
Tianxiang Zhou
1,
Jie Huang
1,
Wenshi Zhao
1,2,3,
Rui Guo
1,
Sicheng Cui
1,
Yuqing Li
1,
Xiaolong Zhang
1,
Yang Liu
1,* and
Qi Zhang
1,*
1
Key Laboratory of Functional Materials Physics and Chemistry (Ministry of Education), College of Physics, Jilin Normal University, Changchun 130103, China
2
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
3
University of Chinese Academy of Sciences, Beijing 100049, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2022, 12(23), 4232; https://doi.org/10.3390/nano12234232
Submission received: 1 November 2022 / Revised: 22 November 2022 / Accepted: 24 November 2022 / Published: 28 November 2022
(This article belongs to the Special Issue Advanced Nanomaterials for LSPR and SERS Applications)
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Abstract

The development and application in different fields of multifunctional plasmonic nanoparticles (NPs) have always been research hotspots. Herein, multi-tip Au nanostars (NSs) with an anisotropic structure were fabricated for the photothermal therapy (PTT) of bacteria and surface-enhanced Raman scattering (SERS) detection of pollutants. The size and localized surface plasmon resonance (LSPR) characteristics of Au NSs were adjusted by varying Au seed additions. In addition, photothermal conversion performance of Au NSs with various Au seed additions was evaluated. Photothermal conversion efficiency of Au NSs with optimal Au seed additions (50 μL) was as high as 28.75% under 808 nm laser irradiation, and the heat generated was sufficient to kill Staphylococcus aureus (S. aureus). Importantly, Au NSs also exhibited excellent SERS activity for the 4-mercaptobenzoic acid (4-MBA) probe molecule, and the local electromagnetic field distribution of Au NSs was explored through finite-difference time-domain (FDTD) simulation. As verified by experiments, Au NSs’ SERS substrate could achieve a highly sensitive detection of a low concentration of potentially toxic pollutants such as methylene blue (MB) and bilirubin (BR). This work demonstrates a promising multifunctional nanoplatform with great potential for efficient photothermal inactivation and ultra-sensitive SERS detection.
Keywords: localized surface plasmon resonance; Au nanostars; photothermal therapy; surface-enhanced Raman scattering; FDTD localized surface plasmon resonance; Au nanostars; photothermal therapy; surface-enhanced Raman scattering; FDTD
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MDPI and ACS Style

Zhou, T.; Huang, J.; Zhao, W.; Guo, R.; Cui, S.; Li, Y.; Zhang, X.; Liu, Y.; Zhang, Q. Multifunctional Plasmon-Tunable Au Nanostars and Their Applications in Highly Efficient Photothermal Inactivation and Ultra-Sensitive SERS Detection. Nanomaterials 2022, 12, 4232. https://doi.org/10.3390/nano12234232

AMA Style

Zhou T, Huang J, Zhao W, Guo R, Cui S, Li Y, Zhang X, Liu Y, Zhang Q. Multifunctional Plasmon-Tunable Au Nanostars and Their Applications in Highly Efficient Photothermal Inactivation and Ultra-Sensitive SERS Detection. Nanomaterials. 2022; 12(23):4232. https://doi.org/10.3390/nano12234232

Chicago/Turabian Style

Zhou, Tianxiang, Jie Huang, Wenshi Zhao, Rui Guo, Sicheng Cui, Yuqing Li, Xiaolong Zhang, Yang Liu, and Qi Zhang. 2022. "Multifunctional Plasmon-Tunable Au Nanostars and Their Applications in Highly Efficient Photothermal Inactivation and Ultra-Sensitive SERS Detection" Nanomaterials 12, no. 23: 4232. https://doi.org/10.3390/nano12234232

APA Style

Zhou, T., Huang, J., Zhao, W., Guo, R., Cui, S., Li, Y., Zhang, X., Liu, Y., & Zhang, Q. (2022). Multifunctional Plasmon-Tunable Au Nanostars and Their Applications in Highly Efficient Photothermal Inactivation and Ultra-Sensitive SERS Detection. Nanomaterials, 12(23), 4232. https://doi.org/10.3390/nano12234232

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