Doped N/Ag Carbon Dot Catalytic Amplification SERS Strategy for Acetamiprid Coupled Aptamer with 3,3′-Dimethylbiphenyl-4,4′-diamine Oxidizing Reaction

Abstract

The as-prepared co-doped N/Ag carbon dot (CDNAg) has strong catalysis of H2O2 oxidation of 3,3′-dimethylbiphenyl-4,4′-diamine (DBD). It forms an oxidation product (DBDox) with surface-enhanced Raman scattering (SERS) activity at 1605 cm−1 in the silver nanosol substrate, and a CDNAg catalytic amplification with SERS analytical platform can be structured based on aptamer (Apt) with the DBD oxidizing reaction. For example, the aptamer (Apt) of acetamiprid (ACT) can be adsorbed on the surface of CDNAg, resulting in inhibited catalytic activity, the reduced generation of DBDox, and a weakened SERS intensity. When the target molecule ACT was added, it formed a stable Apt-ACT complex and free CDNAg that restored catalytic activity and linearly enhanced the SERS signal. Based on this, we proposed a new quantitative SERS analysis method for the determination of 0.01–1.5 μg ACT with a detection limit of 0.006 μg/L.

Retracted: A review on the determination of veterinary drug residues in food products

“…Additionally, there are many compounds in both food industry and environment, such as acetamiprid, imidacloprid, thiamethoxam and thiacloprid. Fortunately, this SERS technology could be employed to detect these substances (Creedon et al, 2020; Feng et al, 2019; Xu et al, 2020) with the good results. Therefore, the SERS technique has a wide application in many fields.…”

Spectroscopic studies of the optical properties of carbon dots: recent advances and future prospects

“…Recently, CDs have been reported to show strong catalysis to generate gold and silver nanomaterials as efficient SERS substrates for quantitative analysis. [124][125][126] In addition, CDs have also been used to support Au and Ag materials for efficient SERS substrates to enhance their SERS activity. For example, Qu and co-workers fabricated a honeycomb architecture composed of CQDs to support gold nanoparticles as a SERS substrate, exhibiting 8-11 times higher SERS activity than the traditional Au nanoparticle SERS substrate.…”

In situ and rapid determination of acetamiprid residue on cabbage leaf using surface‐enhanced Raman scattering

“…Due to the advantages of high sensitivity, low detection limit and great selectivity, the SERS technique has been widely applied in food quality monitoring, such as the detection of chemical components, 12 fungal pathogens, 13,14 mycotoxins, 11 chemical or food additive residues 15,16 and pesticide residues 17–22 . For the past few years, SERS has been used as an alternative method for the detection of acetamiprid residues in agricultural products and foods 23–28 . Many researchers focused on developing various high‐performance SERS‐active substrates for acetamiprid residue detection, and residue analysis of acetamiprid was achieved by immersing the substrates in an extract solution of acetamiprid or directly adding acetamiprid to the surface of the substrates.…”