Fabrication of paper-based SERS substrates by spraying silver and gold nanoparticles for SERS determination of malachite green, methylene blue, and crystal violet in fish

Recent Advances and Applications in Paper-Based Devices for Point-of-Care Testing

“…Yang's group has explored SERS chips with Ag/Au NPs to detect malachite green, methylene blue and crystal violet with LODs of 4.3 × 10 −9 , 2.0 × 10 −8 , and 8.1 × 10 −8 mol/L, respectively. [246]. Other applications in food [247][248][249][250] are shown in Table 3.…”

Finite-difference time-domain to screen Au NPs as SERS active substrate for the sensitive determination of prohibited drugs in fish via solvent cleaning

“…The sensitivity of SERS detection is closely related to the active substrate. Therefore, numerous types of novel SERS substrates were developed, such as silver or gold coupled with transparent flexible support, 4,5 paper-based SERS substrates, 6,7 and carbon materials wrapped noble metal composites. 8–10 Moreover, mesoporous Au nanoparticles 11 and flowerlike Au nanostructures 12 were also employed.…”

Optimum fabrication parameters for preparing high performance SERS substrates based on Si pyramid structure and silver nanoparticles

“…Some authors have shown that strong localized surface plasmon resonance (LSPR) occurs at the nanoscale of noble metals, which can greatly improve the SERS signal (SERS hot spots). [4][5][6][7][8][9][10][11][12][13][14][15][16][17] There are two mechanisms for increasing SERS signal widely accepted. Those are electromagnetic (EM) enhancement and chemical enhancement.…”

“…In fact, there are so many methods to fabricate AgNPs reported for years. 14,[25][26][27] Each method has own advantages or disadvantages. The thermal evaporation method to create AgNPs from initial Ag lm is simple and has no impurities affect.…”