The fabrication of paper separation channel based SERS substrate and its recyclable separation and detection of pesticides

Silver Nanoparticle-Decorated Chitosan Aerogels as Three-Dimensional Porous Surface-Enhanced Raman Scattering Substrates for Ultrasensitive Detection

“…4 Numerous efforts are devoted to designing two-dimensional (2D) SERS substrates with an extremely high enhancement effect, signal uniformity, and environmental stability. Planar nanostructured materials, such as silicon wafer, 5 paper, 6,7 polydimethylsiloxane membranes, 8 anodic porous alumina, 9 and porous silicon, 10−12 deposited with Au or Ag nanoparticles (NPs), are successfully used as SERS substrates. However, a 2D SERS substrate can only collect signals in the direction of the plane and is often limited by the coffee ring effect.…”

“…Numerous efforts are devoted to designing two-dimensional (2D) SERS substrates with an extremely high enhancement effect, signal uniformity, and environmental stability. Planar nanostructured materials, such as silicon wafer, paper, , polydimethylsiloxane membranes, anodic porous alumina, and porous silicon, − deposited with Au or Ag nanoparticles (NPs), are successfully used as SERS substrates. However, a 2D SERS substrate can only collect signals in the direction of the plane and is often limited by the coffee ring effect. , Compared with 2D substrates, the ultrahigh specific surface area and three-dimensional (3D) porous microstructure of a 3D SERS substrate adsorbs more probe molecules and induces SPR more easily. − Therefore, increasing amounts of 3D porous materials are being developed and applied as SERS substrates.…”

Deltamethrin and fenvalerate in vegetables and rice

“…In view of this, several analytical techniques have been reported for the detection of both DLM and FV, including gas chromatography, 11 high-performance liquid chromatography, 12 mass spectrometry, 13 immunoassay-based methods, 14 and surface-enhanced Raman spectroscopy. 15 However, these techniques have certain limitations, such as high sample volume, requirement of skilled technicians, time, difficulty, complicated sample preparation, and difficulty to apply for on-site analysis. 16 To overcome these issues, developing a rapid and facile technique for detecting pyrethroids in the environment is highly demanded.…”

Development of a High-Throughput Low-Cost Approach for Fabricating Fully Drawn Paper-Based Analytical Devices Using Commercial Writing Tools

“…The disadvantages of these methods are the limited spatial resolution achieved and the need for post-fabrication treatment (by heating or UV irradiation). On the other hand, home-made pens or empty cartridges of commercial pens filled with various hydrophobic materials prepared in-house have been reported for the creation of hydrophobic patterns, including: trichloro perfluoroalkylsilane [27]; nail polish [28]; waterbased alkyl ketene dimer [29,30]; modified commercial permanent ink [31]; and solubilized poly(methyl methacrylate) [32]. However, all these methods require a lengthy preparation step, careful optimization of the composition of the functional material to be used and heating (after the fabrication of the PADs) to eliminate residual solvents.…”