A nitrile-mediated aptasensor for optical anti-interference detection of acetamiprid in apple juice by surface-enhanced Raman scattering

A gold nanoparticle-based visual aptasensor for rapid detection of acetamiprid residues in agricultural products using a smartphone

“…To verify the reliability of the method, real environmental and agricultural products samples including cabbage, cucumber, and river water samples were pretreated and spiked with the quantitatively standard acetamiprid solution according to the previous report. 27,28 Briefly, filter the river water after standing still, and then pass it through a 0.22 μM membrane. The cucumber and cabbage samples were made into a paste with a homogenizer, added with an appropriate amount of buffer, and centrifuged at 4000 rpm for 20 minutes.…”

A label-free dual-modal aptasensor for colorimetric and fluorescent detection of sulfadiazine

“…11,12 As the detection probes, aptamers are characterized by the wide target range, low cost, high stability, and simple synthesis. 13 Aptasensors using aptamers as detection probes have been developed for the detection of analytes, and can be broadly classified into the colorimetric, 14 fluorescent, 15 surface-enhanced Raman scattering, 16 and electrochemical, 17 ones according to the specific detection method. Nanomaterials, such as gold nanoparticles (AuNPs), 18 graphene oxide, 19 and metal–organic frameworks, 20 have been frequently used to fabricate aptasensors, among which AuNPs are preferred due to their unique properties.…”

An aptamer SERS/RRS/Abs trimode biosensor for trace Pb 2+ based- liquid crystal@nanosilver catalytic amplification

“…We knew that some small organic compounds and metal ions had small scattering crosssections, and their SERS method had low sensitivity and selectivity. It was of great signi cance to couple with some selective biochemical reactions such as Apt and enzyme reactions [13]. Liu [14] established SERS detection method for determining 10 pm-1 µM insulin-like growth factor 2 receptor protein based on Apt reaction and gold/silver nano substrate.…”