Surface enhanced Raman scattering of TNT and DNT on colloidal nanoparticles of Ag/TiO 2

Porous Substrates for Label-Free Molecular Level Detection of Nonresonant Organic Molecules

“…In fact, despite significant efforts, these classes of compounds usually remain “stealthy” in Raman measurements. For example, the lowest limit of detection reported in literature for DNT is few parts per billion (ppb) in the solid state on metal nanostructured substrates − and hundredths of μM in solution, a modest level far from single molecule ability demonstrated for Raman markers such as rhodamine 6G and crystal violet.…”

Preliminary Study on Double Enhanced Raman Scattering Detection of Gas Phase Trace Explosives

“…The key to realize SERS detection of trace explosives was to study a SERS substrate with simple preparation process, good reproducibility and continuous detection. According to the specific functional structure and characteristics of SERS substrate, it can be divided into the following five categories: (1) SERS substrate with rough noble metal [14][15][16][17][18][19][20]; (2) SERS substrate with periodic array structure [21][22][23][24]; (3) SERS substrate with assembled ordered particle [25][26][27][28]; (4) Core shell SERS substrate [29][30][31][32]; (5) Graphene composite SERS substrate [33][34][35][36][37][38]. Two novel SERS substrates with special functions, diatom cell environmental protection substrate [39] and photocatalytic self-cleaning substrate [40], were also introduced in the literatures.…”