Competitive Lateral Flow Immunoassay Relying on Au-SiO2 Janus Nanoparticles with an Asymmetric Structure and Function for Furazolidone Residue Monitoring

	Competitive Lateral Flow Immunoassay Relying on Au-SiO2 Janus Nanoparticles with an Asymmetric Structure and Function for Furazolidone Residue Monitoring
	Su, Lihong; Wang, Lulu; Xu, Jingke; Wang, Zonghan; Yao, Xiaolin; Sun, Jing; Wang, Jianlong; Zhang, Daohong
刊名	JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
	2021
卷号	69 期号:1
关键词	Au-SiO2 Janus nanoparticle asymmetric structure lateral flow immunoassay furazolidone
英文摘要	Gold nanoparticles (AuNPs) are the most commonly used signal materials in lateral flow immunoassay (LFIA). However, the assay sensitivity of traditional AuNP-based LFIA is usually limited by the incomplete competition between free target analytes and immobilized antigens for the binding of Au-NP-labeled antibodies. To unfreeze this limitation, here, asymmetric Au-SiO2 Janus NPs (about 66 nm) were designed and synthesized. Au-SiO2 Janus NPs can assemble into snowman-like anisotropic structures and combine two different physicochemical properties at their opposite sides, where the AuNP side mainly possesses the antibody conjugating and signal providing functions and the SiO2 side primarily offers the stable function. In virtue of the unique asymmetric nanostructure, only the AuNP side can interact with target analytes by specific antigen-antibody interactions, which could significantly improve the efficiency of competition. Selecting furazolidone as a model analyte, the immunoassay biosensor showed a limit of detection as low as 0.08 ng/mL, 10-fold decreased than that of the AuNPs-LFIA. Moreover, the Au-SiO2 Janus NP lateral flow immunoassay was well applied in chicken, pork, honey, and beef food samples with visual detection limits of 0.8 ng/g, 0.16 ng/g, 0.4 ng/mL, and 0.16 ng/g, respectively. The Au-SiO2 Janus NPs possess the advantages of both materials, which will broaden their applications as a potential alternative in the rapid and sensitive detection of antibiotic residues.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/60872]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Su, Lihong,Wang, Lulu,Xu, Jingke,et al. Competitive Lateral Flow Immunoassay Relying on Au-SiO2 Janus Nanoparticles with an Asymmetric Structure and Function for Furazolidone Residue Monitoring[J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2021,69(1).
APA	Su, Lihong.,Wang, Lulu.,Xu, Jingke.,Wang, Zonghan.,Yao, Xiaolin.,...&Zhang, Daohong.(2021).Competitive Lateral Flow Immunoassay Relying on Au-SiO2 Janus Nanoparticles with an Asymmetric Structure and Function for Furazolidone Residue Monitoring.JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,69(1).
MLA	Su, Lihong,et al."Competitive Lateral Flow Immunoassay Relying on Au-SiO2 Janus Nanoparticles with an Asymmetric Structure and Function for Furazolidone Residue Monitoring".JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 69.1(2021).