How relevant can the SERS effect in isolated nanoparticles be?

SERS studies of isolated and agglomerated gold nanoparticles functionalized with a dicarboxybipyridine‐trimercaptotriazine‐ruthenium dye

“…This band is always observed in the case of aggregation, and its absence corroborates the nanoparticles stabilization promoted by the [Ru(dcb) 2 (tmt)] 3− complexes. Direct evidence of the isolated nanoparticles in this system has already been obtained using dark‐field hyperspectral microscopy (Cytoviva) . For the systems containing the [Ru(dcb) 2 (tmt)] 3− complex, the dark‐field spectral imaging is essentially consist of isolated nanoparticles, and their spectra exhibited exclusively the characteristic surface plasmon band around 550 nm.…”

“…As a matter of fact, the [Ru(dcb) 2 tmt] n− dye is capable of binding gold nanoparticles via the sulfur ligand and stabilizing the AuNP colloids based on the electrostatic repulsions from the negatively charge complex . In addition, it displays strong metal‐to‐ligand CT bands in the visible, providing an excellent SERS probe.…”

“…In addition, it displays strong metal‐to‐ligand CT bands in the visible, providing an excellent SERS probe. By means of dark‐field hyperspectral and Raman confocal microscopy, it has been possible to distinguish between the isolated and agglomerated [Ru(dcb) 2 tmt] n− ‐AuNPs, from their distinct extinction spectra . However, a detailed Raman spectral study comparing the SERS response of such isolated and agglomerated nanoparticles has never been reported.…”

Preparation of Quasi-Three-Dimensional Porous Ag and Ag-NiO Nanofibrous Mats for SERS Application

“…Therefore the discovery of SERS has resulted in a new sensor research field. SERS based sensors demonstrated several benefits, especially in ultra-sensitivity (enhanced signals) and excellent selectivity (fingerprint spectrum) in real applications, compared with traditional analytical methods [ 9 , 10 , 11 , 12 ]. SERS has already been applied in analytes detection with single molecule sensitivity [ 13 ].…”

Asfalteno: um desafio para indústria de petróleo e a busca de soluções pela nanociência

“…A imagem hiperespectral do filme contendo os AuNRs apresenta principalmente partículas espalhando no vermelho, algumas no verde e outras poucas no amarelo e inversamente do comprimento de onda da radiação incidente, enquanto que o espalhamento, depende à quarta potência161 . Então, o espalhamento está sempre deslocado para maiores comprimentos de onda, como pode-se observar nos espectros eletrônicos de extinção e espalhamento dos nanobastões nasFigura 39 Figura 66 respectivamente, compilado na Tabela 6.…”