Graphene Oxide-Coated Metal–Insulator–Metal SERS Substrates for Trace Melamine Detection

Wang，Zhenming1; Liu，Jianxun1; Wang，Jiawei1; Ma，Zongjun1; Kong，Delai1; Jiang，Shouzhen2; Luo，Dan1; Liu，Yan Jun1

2022-04-01

10.3390/nano12071202

Nanomaterials   影响因子和分区

2079-4991

Surface-enhanced Raman spectroscopy (SERS) has long been an ultrasensitive technique for trace molecule detection. However, the development of a sensitive, stable, and reproducible SERS substrate is still a challenge for practical applications. Here, we demonstrate a cost-effective, centimeter-sized, and highly reproducible SERS substrate using the nanosphere lithography technique. It consists of a hexagonally packed Ag metasurface on a SiO/Au/Si substrate. A seconds-lasting etching process of a self-assembled nanosphere mask manipulates the geometry of the deposited Ag metasurface on the SiO/Au/Si substrate, which attains the wavelength matching between the optical absorbance of the Ag/SiO/Au/Si substrate and the excitation laser wavelength as well as the enhancement of Raman signals. By spin-coating a thin layer of graphene oxide on the substrate, a SERS performance with 1.1 × 10 analytical enhancement factor and a limit of detection of 10 M for melamine is achieved. Experimental results reveal that our proposed strategy could provide a promising platform for SERS-based rapid trace detection in food safety control and environmental monitoring.

hot spot metasurface self-assembly sensitivity SERS surface plasmon

SCI

英语

第一 ; 通讯

Natural Science Foundation of Guangdong Province[2019A1515110864];National Natural Science Foundation of China[62075093];

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000781304800001

MDPI

2-s2.0-85127378080

Scopus

1.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Provincial Key Laboratory of Optics and Photonic Device,School of Physics and Electronics,Shandong Normal University,Jinan,250014,China

Wang，Zhenming,Liu，Jianxun,Wang，Jiawei,等. Graphene Oxide-Coated Metal–Insulator–Metal SERS Substrates for Trace Melamine Detection[J]. Nanomaterials,2022,12(7).

Wang，Zhenming.,Liu，Jianxun.,Wang，Jiawei.,Ma，Zongjun.,Kong，Delai.,...&Liu，Yan Jun.(2022).Graphene Oxide-Coated Metal–Insulator–Metal SERS Substrates for Trace Melamine Detection.Nanomaterials,12(7).

Wang，Zhenming,et al."Graphene Oxide-Coated Metal–Insulator–Metal SERS Substrates for Trace Melamine Detection".Nanomaterials 12.7(2022).