AuNP array coated substrate for sensitive and homogeneous SERS-immunoassay detection of human immunoglobulin G. Issue 37 (28th June 2021)

• Record Type: Journal Article
• Authors: Qu, Qi; Wang, Jing; Zeng, Chuan; Wang, Mengfan; Qi, Wei; He, Zhimin
• Is Part Of: RSC advances. Volume 11:Issue 37(2021)
• Page Start: 22744
• Page End: 22750
• Publication Date: 2021-06-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra02404c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : An AuNP array coated substrate was developed for the SERS-immunoassay detection of human immunoglobulin G. Abstract : Owing to the high sensitivity, fast responsiveness and high specificity, immunoassays using surface-enhanced Raman scattering (SERS) as the readout signal displayed great potential in disease diagnosis. In this study, we developed a SERS-immunoassay method for the detection of human immunoglobulin G (HIgG). Upon involving well-ordered AuA on a SERSIA substrate, the LSPR effect was further enhanced to generate a strong and uniform Raman signal through the formation of sandwich structure with the addition of target HIgG and SERSIA tag. Optimization of the assay provided a wide linear range (0.1–200 μg mL −1 ) and low limit of detection (0.1 μg mL −1 ). In addition, the SERS-immunoassay method displayed excellent specificity and was homogeneous, which guaranteed the practical use of this method in the quantitative detection of HIgG. To validate this assay, human serum was analysed, which demonstrated the potential advantages of SERS-immunoassay technology in clinical diagnostics.