SERS detection and characterization of uranyl ion sorption on  silver nanorods wrapped with Al2O3 layers

RETRACTED ARTICLE: Attomolar SERS detection of organophosphorous pesticides using silver mirror–like micro-pyramids as active substrate

“…Nowadays, methods for real time and rapid pesticide detection in food are of particular interest for consumers and researchers. Surface-enhanced Raman spectroscopy (SERS) provides not only ultrasensitive and fast detection, but also a rich vibrational spectroscopic information crucial for identification of chemical compounds [8][9][10][11][12].…”

Rapid and sensitive detection of uranyl ion with citrate-stabilized silver nanoparticles by the surface-enhanced Raman scattering technique

“…The limit of detection (LOD) (60 nM) was calculated by three standard deviations of the blank measurements, showing a good sensitivity. Table 1 lists the comprehensive comparison results of the proposed wet-state method with others reported in the literature [20,34,[37][38][39]. The LOD of our proposed SERS method is higher than those obtained based on DNAzyme or complex nanostructures, while the advantages such as simplicity, rapidness and convenience make it a forceful competitor in real-time environmental monitoring.…”

“…Surface-enhanced Raman scattering (SERS) technique [9][10][11][12][13] has the advantages of simplicity, convenience, high sensitivity, non-requirement of pretreatment of analysed sample and has great potential in the rapid and sensitive detection of inorganic ions, organic molecules, even biomacromolecules [14 -17]. Many efforts have been made for SERS detection of uranyl ion by fabricating different types of SERS substrates, such as silver-doped sol-gel [18], gold nanostars [19], Al 2 O 3 -coated silver nanorod [20], silver nanoparticles conjugated reduced graphene oxide nanosheets [21] and so on. SERS measurements of those based on ordered nanostructure substrates (dry-state substrate) fabricated by self-assembly or vapour deposition methods usually need drying the sample onto the substrate, which is difficult to obtain quantitative detection due to the coffee-ring effect and substrate-self defect.…”

Research progress of SERS on uranyl ions and uranyl compounds: a review

“…So far, a number of articles have focused on the trace analysis of uranyl ions and uranyl compounds based on the SERS technique since S. Dai et al first put forward the SERS effect of uranyl ions. 33 Most of the SERS substrates are gold or silver nanostructures, including silver-doped sol-gel films, 33,34 silver and gold nanoparticles, [35][36][37] surfacefunctionalized silver and gold nanoparticles, [38][39][40][41][42][43][44][45][46][47][48] nanofabricated ellipse-sphere dimer, 49 silver nanorods, 50,51 inert materialwrapped silver nanorods, 52,53 Ag 2 O aggregates, 54 and DNAmodified silver and gold nanostructures. [55][56][57][58][59] In order to improve the SERS intensity of uranyl ions as much as possible, it is essential to elucidate the SERS mechanisms of uranyl ions on gold and silver nanostructures.…”