NIR persistent luminescence nanoparticles based turn-on aptasensor for autofluorescence-free determination of 17β-estradiol in milk

Dual-Mode Lateral Flow Immunoassay Based on “Pompon Mum”-Like Fe3O4@MoS2@Pt Nanotags for Sensitive Detection of Viral Pathogens

“…A similar phenomenon was also reported in Fe 3 O 4 nanoring 53 and MoS 2 nanosheet. 54 FT-IR spectra of the samples were further measured as displayed in Figure S4b. The bands at 584 and ∼3125 cm −1 were attributed to the stretching vibration of FeO and O−H groups, respectively.…”

Nanostructured wearable electrochemical and biosensor towards healthcare management: a review

“…A recent report by Bacchu et al , 148 showed that the biosensor, g-C 3 N 4 /APTES/SPE (g-C 3 N 4 = graphitic carbon nitride, APTES = 3-aminopropyltriethoxysilane, SPE = screen-printed electrode) is very effective and can detect estradiol with a wide range of linearity from 1 × 10 −6 to 1 × 10 −18 mol L −1 , LOD of 9.9 × 10 −19 mol L −1 , high selectivity, and stability. Other biosensors, such as aptamer-based label-free biosensors, 149–153 near-infrared (NIR) phosphorescence aptasensor, 154 split aptamer regulated CRISPR/Cas12a (CRISPR = Clustered Regularly Interspaced Short Palindromic Repeats, Cas12a = RNA-guided endonuclease) biosensor, 155,156 Hydrogel optical waveguide spectroscopy a label-free biosensor, 157 highly sensitive laccase-based biosensor, i.e. , Lac/rGO-RhNP/GCE electrode, 158 Lac/PLLY/CA-GR/GCE, 159 , (Lac = Laccase, CA-GR = critic acid@graphene, PLLY = poly l-lysine), Impedance-based E-screen cell biosensor 160 were reported with excellent performance for different kinds of samples with 17β-estradiol.…”

Poly(allylamine)-copper(ii) coordination complex grafted on core@shell upconversion nanoparticles for ultrafast and sensitive determination of the phytohormone salicylic acid in plant extracts

“…The NIR-activated nanoprobes have demonstrated many advantages for selective determination of analytes in complex food matrices because this low-energy irradiation avoids de undesired background fluorescence and induce less damage to samples. 22 The upconversion nanoparticles (UCNPs) can sequentially absorb and convert NIR-photons (usually at 808 or 975 nm) into higher-energy emissions across the UV, visible and NIR range. 23 Therefore, UCNPs present higher chemical and photophysical stability and longer lifetime emissions concerning traditional fluorescent organic probes.…”