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Biosensors 2018, 8(4), 113; https://doi.org/10.3390/bios8040113

One-Pot Synthesis of Multi-Branch Gold Nanoparticles and Investigation of Their SERS Performance

1
Institute of Photonics, Faculty of Science, Ningbo University, Ningbo 315211, China
2
XLIM Research Institute, UMR 7252 CNRS/University of Limoges, 123, Avenue Albert Thomas, 87060 Limoges CEDEX, France
3
Center for Terahertz Wave, Key Laboratory of Opto-Electronic Information Science and Technology, Ministry of Education, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
*
Authors to whom correspondence should be addressed.
Received: 30 October 2018 / Revised: 14 November 2018 / Accepted: 16 November 2018 / Published: 20 November 2018
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Abstract

Gold nanoparticles with multiple branches have attracted intensive studies for their application in sensing of low trace molecules. A large number of the merits found on the gold nanoparticles for the above applications are attributed to the strong localized surface plasmon resonance excited by the incident radiation. However, a facile and flexible way of synthesizing the multi-branch gold nanoparticles with tunable localized surface plasmon resonance frequency is still a challenge for the plasmonic research field. Herein, we report an efficient one-pot synthesis of multi-branch gold nanoparticles method that resembles a seed-medicated approach while using no further chemicals except chloroauric acid, ascorbic acid and 4-(2-Hydroxyethyl)-1-piperazinyl]-ethanesulfonic acid. By controlling the amounts of ascorbic acid volumes in the reaction mixture, the morphology and the localized surface plasmon resonance frequency of the synthesized multi-branch gold nanoparticles can be manipulated conveniently. Moreover, using the 4-Mercaptobenzoic acid as the Raman reporter, the multi-branch gold nanoparticles show superior surface-enhanced Raman spectroscopy characteristics that can be potentially used in chemical and biological sensing. View Full-Text
Keywords: gold nanoparticle with branches; one-pot synthesis; LSPR frequency tuning; surface enhanced Raman scattering gold nanoparticle with branches; one-pot synthesis; LSPR frequency tuning; surface enhanced Raman scattering
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Lv, W.; Gu, C.; Zeng, S.; Han, J.; Jiang, T.; Zhou, J. One-Pot Synthesis of Multi-Branch Gold Nanoparticles and Investigation of Their SERS Performance. Biosensors 2018, 8, 113.

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