Facile interfacial synthesis of gold micronails with adjustable length and roughness and their superior SERS properties for the detection of p-aminothiophenol--颗粒学报PARTICUOLOGY

Li, H., Yao, K., Liu, T., Lu, W., & Zhao, H. (2024). Facile interfacial synthesis of gold micronails with adjustable length and roughness and their superior SERS properties for the detection of p-aminothiophenol. Particuology, 91, 333-340. https://doi.org/10.1016/j.partic.2024.04.005

Facile interfacial synthesis of gold micronails with adjustable length and roughness and their superior SERS properties for the detection of p-aminothiophenol

Hang Li^a, Kaisheng Yao^a *, Tianhang Liu^a, Weiwei Lu^a, Haili Zhao^b *

a School of Chemistry and Chemical Engineering, Henan University of Science and Technozlogy, Luoyang, 471023, China
b School of Physics and Engineering, Henan University of Science and Technology, Luoyang, 471023, China

10.1016/j.partic.2024.04.005

Volume 91, August 2024, Pages 333-340

Received 7 February 2024, Revised 30 March 2024, Accepted 4 April 2024, Available online 24 April 2024, Version of Record 30 April 2024.

E-mail: ksyao@haust.edu.cn; hlzhao921@126.com

Highlights

• Au micronails were one-pot prepared at CHCl₃–H₂O interface and room temperature.

• Surface roughness and length of Au micronails can be adjusted easily.

• Synthetic strategy was achieved without any surfactant or seed.

• Au micronails exhibit strongly enhanced SERS responses and high reproducibility.

Abstract

Au hierarchical architectures with special morphology and structures are strongly desired in varied applications. Herein, a simple synthesis method was developed for the one-step preparation of Au micronails (MNs) at the planar liquid-liquid interface under mild conditions. The well-defined Au MNs were grown and constructed at CHCl₃–H₂O interface at room temperature using aniline in CHCl₃ as reducing agent and HAuCl₄ in H₂O as precursor and no surfactant or seed is required. The intriguing Au MNs with rough surface consist of big heads and thin rods, just like iron nails in outline. Furthermore, through simple changing the reagent concentrations, the length and surface roughness of Au MNs can be adjusted conveniently. The effects of a series of factors on the morphology and structure of the products are studied in detail. With p-aminothiophenol as a molecular probe, the as-obtained Au MNs all exhibit dramatically improved surface enhanced Raman scattering sensitivity and high reproducibility, the enhancement factor and limit of detection of Au MNs are 5.4 × 10⁵ and 1.0 × 10⁻¹⁰, respectively.

Graphical abstract

Keywords

Au micronails; Liquid-liquid interface synthesis; Surface enhanced Raman scattering; P-aminothiophenol

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