Refractive index and temperature sensing in anisotropic silver nanostructures with stable photo-physical properties

Growth Kinetics and Sensing Features of Colloidal Silver Nanoplates

“…These colloids reach plasmon sensitivity values as high as 450 nm/RIU, and each single particle has aspect ratios as high as 20. Recent literature data [30] indicate that such a sensitivity remains unchanged even after 2.5 years, a major requirement for most industrial applications. Finally, the comparison of the experimental data with an established model has demonstrated that plasmon sensitivity does not depend directly on the nanoparticle shape and aspect ratio but merely on the position of the resonance.…”

Gold nanostructures for the sensing of pH using a smartphone

“…The linear optical absorption properties of the anisotropic-shaped metal nanoparticles, which arise due to different higher order multipolar plasmon resonances, have been studied theoretically and experimentally earlier by various researchers in great detail. [21][22][23][24] However, the plasmon oscillation at the shorter wavelength region observed in S3 and S4 of this work is due to quadrupole resonance. 21 On the other hand, the plasmon absorption band observed at the higher wavelength is due to the dipole resonance.…”

“…21 The dipole resonance is more sensitive than the quadrupolar resonance in response to environmental changes, such as shape and size of GNs, refractive index (RI) of the surrounding medium and attachment of any ligands. [22][23][24] The digital photographs of the specimens, taken under visible light illumination, are shown in the adjacent vertical panel (right hand side) of Fig. 1a-e, which show the color of the specimens.…”

PVP‐Capped Gold Nanoparticles: Thermal Nonlinear Refraction Probed by Spatial Self‐Phase Modulation

“…[10][11][12][13] SSPM has also been employed for studying the nonlinear optical properties of thermal origin of 2D nanostructured materials, for instance Bi 2 Se 3 -Bi 2 Te 3 heterostructures, [14] iron phosphorus trichalcogenides, [15] graphene oxide, [16] antimonene, [17] ultrathin niobium carbide sheets, [18] germanium selenide nanoflakes, [19] and fullerenes [20] and NbSe 2 [21] besides perovskite quantum dots [22] and silver nanocrystals of divers geometry. [23] Due to the high biocompatibility and optical properties, gold nanoparticles (AuNPs) of different shapes have been tested for numerous applications as theranostics, [24] biosensing and imaging, [25] cancer therapy, [26] and drug delivery. [27] For applications involving clinical trials in human beings and animals models, important issues are the stability and biocompatibility of the nanoparticles.…”

“…[ 10–13 ] SSPM has also been employed for studying the nonlinear optical properties of thermal origin of 2D nanostructured materials, for instance Bi 2 Se 3 ‐Bi 2 Te 3 heterostructures, [ 14 ] iron phosphorus trichalcogenides, [ 15 ] graphene oxide, [ 16 ] antimonene, [ 17 ] ultrathin niobium carbide sheets, [ 18 ] germanium selenide nanoflakes, [ 19 ] and fullerenes [ 20 ] and NbSe 2 [ 21 ] besides perovskite quantum dots [ 22 ] and silver nanocrystals of divers geometry. [ 23 ]…”