title: Ultra-sensitive non-aggregation colorimetric sensor for detection of iron based on the signal amplification effect of Fe3+ catalyzing H2O2 oxidize gold nanorods.
abstract: Fe(3+) can catalyze H2O2 to oxidize along on the longitudinal axis of gold nanorods (AuNRs), which caused the aspect ratio of AuNRs to decrease, longitudinal plasmon absorption band (LPAB) of AuNRs to blueshift (Δλ) and the color of the solution to change obviously. Thus, a rapid response and highly sensitive non-aggregation colorimetric sensor for the determination of Fe(3+) has been developed based on the signal amplification effect of catalyzing H2O2 to oxidize AuNRs. This simple and selective sensor with a wide linear range of 0.20-30.00 μM has been utilized to detect Fe(3+) in blood samples, and the results consisted with those obtained by inductively coupled plasma-mass spectroscopy (ICP-MS). Simultaneously, the mechanism of colorimetric sensor for the detection of Fe(3+) was also discussed.
authors.affiliation: Department of Chemistry and Environmental Science, Zhangzhou Normal College, Zhangzhou 363000, PR China. Electronic address: zzsyliujiaming@126.com.
authors.forename: Jia-Ming
authors.initials: JM
authors.lastname: Liu
authors.forename: Xin-Xing
authors.initials: XX
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Jiao
authors.forename: Ma-Lin
authors.initials: ML
authors.lastname: Cui
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Lin
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Zhang
authors.forename: Shu-Lian
authors.initials: SL
authors.lastname: Jiang
mesh_terms: D000042:Absorption; D002384:Catalysis; D003124:Colorimetry / Q000379:methods* / Q000592:standards; D006046:Gold / Q000737:chemistry*; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000097:blood*; D043942:Nanotubes / Q000737:chemistry; D010084:Oxidation-Reduction; D012680:Sensitivity and Specificity; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold; D006861:Hydrogen Peroxide; D007501:Iron
keywords: Catalyzing non-aggregation colorimetric sensor; Gold nanorods; Iron; Longitudinal plasmon absorption band; Signal amplification