Constructing a Highly Sensitivity SERS Sensor Based on a Magnetic Metal–Organic Framework (MOF) to Detect the Trace of Thiabendazole in Fruit Juice

Abstract

Substrate materials possessing high sensitivity and storage stability are vital for the practical analytical applications of surface-enhanced Raman scattering (SERS) techniques.

An adhesive SERS substrate based on a stretched silver nanowire-tape for the in situ multicomponent analysis of pesticide residues

“…The LOD was determined using the formula of LOD = 3 S b / k , where S b represents the standard deviation of Raman intensity of blank samples, and k is the slope of the calibration curve. 36,39 Similarly, both the peaks at 780 (in-plane C–N bending and C–S stretching) and 1009 cm −1 (C–C stretching and C–N stretching) 40,41 were used to facilitate the relationship between SERS intensities and TBZ concentrations from 1 × 10 −5 to 1 mg mL −1 , demonstrating a LOD of 6.16 × 10 −6 mg mL −1 (equivalent to 8.19 × 10 −2 ng cm −2 ) (Fig. 7c and d).…”

“…Assignment of selected Raman shifts of 4-MBA,45 2-NAT,46 CV, 47 R6G,48 MB,49 TBZ,40,41 and TMTD37,38 molecules …”

An accuracy improved ratiometric SERS sensor for rhodamine 6G in chili powder using a metal–organic framework support

“…2A, the characteristic peaks of 4-MBA at 1077 cm −1 (n (C-S) aromatic stretching), 1585 cm −1 (n (C-C) stretching) and that of R6G at 612 cm −1 (C-C-C ring in-plane vibration movement), 773 cm −1 (d oop (C-H) stretching), 1313 cm −1 (xanthene core and amide group), 1363 cm −1 (xanthene core and amide group), 1511 cm −1 (y s(C-C) stretching) could be obviously observed in the SERS spectra by using Au@Ag NRs as SERS substrate. [32][33][34] Additionally, the SERS performance for R6G detection of Au-MBA@Ag Fig. 2 (A) SERS spectra of Au@Ag-MBA, Au@Ag-R6G and Au-MBA@Ag-R6G.…”

Ultrasensitive detection of thiram based on surface-enhanced Raman scatteringviaAu@Ag@Ag core/shell/shell bimetallic nanorods

“…The obtained juice was then centrifuged at 10 000 rpm and the supernatant was taken to attain pulp-free juice. 32 Next, standard solutions of thiram with different concentrations were added to the orange juice supernatant for subsequent material preparation. The remaining preparation steps for the Au@Ag@thiram-real-samples@Ag NRs together with the utilized reagent concentration and doses were the same as those exploited for synthesizing the Au@Ag@thiram@Ag NRs.…”