Highly reusable nanoporous silver sheet for sensitive SERS detection of pesticides

Abstract

<p>Reusing nanoporous Ag sheets 20 times after simple ultrasonic cleaning for sensitive SERS detection of organochlorine pesticides.</p>

Towards practical and sustainable SERS: a review of recent developments in the construction of multifunctional enhancing substrates

“…Depending on their functionality, the multifunctional SERS substrates were categorized into flexible substrates for in-situ analysis of surface residues, separation-of certain complex real-life samples to be performed. Moving forward, the next step is to develop multifunctional substrates ARTICLE Please do not adjust margins Please do not adjust margins [224] 1 µM lindane or rhodamine B water solution solvent treatment Immerse in ethanol for 5 mins -sonicate in water for 8 mins analyte fully removed; SERS activity fully maintained for 22 cycles graphene-veiled Au(Ag) nanoarray [228] 10 -5 M rhodamine 6G, 10 -2 M amoxicillin, unspecified amount of rhodamine B and methylene blue water solutions annealing heated at 300 °C for 30 mins analyte fully removed; SERS activity maintained for 15 cycles with rhodamine 6G; fluctuation in SERS activity due to change in particle morphology; 2 cycles demonstrated for amoxicillin, rhodamine B and methylene blue Au nanorod array on Si wafer [230] 10 mg/L thiabendazole methanol solution plasma treatment for 1 min SERS activity fully maintained for 7 cycles; RSD between regeneration cycles was 4.87%…”

“…115,221,222 To increase the effectiveness of this approach and shorten the treatment time, the washing process is sometimes accompanied by sonication. [223][224][225] This approach has typically been demonstrated with model dye molecules, such as rhodamine 6G and malachite green, 222,224,225 which are adsorbed on the surface of the enhancing substrate through weak electrostatic attraction but has also been demonstrated with less effectiveness for more strongly adsorbing analytes, such as thiram. 115,221 Strongly adsorbed analytes can be fully removed from the enhancing surface via thermal treatment.…”

Ag nanoparticles on ZnO nanoplates as a hybrid SERS-active substrate for trace detection of methylene blue

“…It allows one to understand the adsorptive behavior of the probe molecules on the nanostructured surface. 12 Recent studies show that SERS is an ultra-sensitive vibrational spectroscopy in the field of food safety, capable of detecting pesticide residues, 13 abamectin, 14 malachite green, 10 DNA, 15 melamine, 16 podamine, 4 methylene blue, 7 etc. with high sensitivity and excellent selectivity.…”

Biosensing Chlorpyrifos in Environmental Water Samples by a Newly Developed Carbon Nanoparticle-Based Indirect Lateral Flow Assay

“…Adequate screening and measuring at the point of need will save valuable time in decision-making and lab workloads (as negative samples do not need to be sent to the laboratory for confirmation). Pesticide detection assays for point of need application come in many formats, e.g., enzymatic lab-in-a-syringe detection [ 54 ], screen-printed electrodes (SPEs) for electrochemical (bio)sensing [ 55 ], surface-enhanced Raman spectroscopy (SERS) [ 56 ], and portable optical biosensors [ 57 ], each having its own advantages and disadvantages. However, it does not get much simpler in both equipment and handling than an LFD.…”