Importance of lattice contraction in surface plasmon resonance shift for free and embedded silver particles

Silica-supported silver nanoparticles: Tailoring of structure-property relationships

“…1,24 Moreover, the observed peak broadening could be attributed to a gradually wider size and shape distribution when the silver percentage is increased. 4,20,23 This phenomenon was likely to be responsible also for the marked peak asymmetry in the samples featuring a higher Ag content. 25,31 Finally, the peak shift towards higher wavelengths could be ascribed to the absorption by larger coalescence aggregates 16,22,23,25 and to the increasing interaction between more and more densely packed Ag nanoparticles.…”

“…6,8,[16][17][18][19] As a general rule, material features are strongly dependent on silver nanoparticle dimensions, size distribution and shape, as well as on the Ag amount and its dispersion. 4,8,15,20,21 Further characteristics influencing the system properties are the chemical nature of the supporting/embedding matrix and its structural and morphological characteristics. 1,13,20,22 In fact, the mutual interactions between silver nanoparticles and their surroundings 5 result in peculiar features that are not displayed by the metal alone.…”

“…4,8,15,20,21 Further characteristics influencing the system properties are the chemical nature of the supporting/embedding matrix and its structural and morphological characteristics. 1,13,20,22 In fact, the mutual interactions between silver nanoparticles and their surroundings 5 result in peculiar features that are not displayed by the metal alone. [20][21][22][23][24][25] Although the possibility of tailoring material properties represents a major advantage for its applications, it often constitutes a drawback from a synthetic point of view, since it requires the use of suitable preparation and processing techniques to obtain the desired functional performances.…”

“…1,13,20,22 In fact, the mutual interactions between silver nanoparticles and their surroundings 5 result in peculiar features that are not displayed by the metal alone. [20][21][22][23][24][25] Although the possibility of tailoring material properties represents a major advantage for its applications, it often constitutes a drawback from a synthetic point of view, since it requires the use of suitable preparation and processing techniques to obtain the desired functional performances. 26 In particular, as concerns Ag/SiO 2 nanosystems, many synthesis routes have been employed including sol-gel and impregnation, 1,13,16,24 ion implantation, 27,28 evaporation, 4,29,30 combined thermal and electron-beam deposition, 31 and sputtering.…”

Chitosan capped Silver nanoparticles used as Pressure sensors

“…This Phenomenon is observed at the interface between metal and dielectric medium due to the interaction of metal electrons with incident light provided the size of the metal particles is above the critical value [31]. Numerous theoretical models and experimental results are published in an effort to understand the effect of particle size on the surface Plasmon resonance peak in nanomaterials, still the subject is not clearly resolved [32,33,34,35] X-ray diffraction patterns were recorded for both uncapped and capped silver nanoparticles samples in the range 2θ = 10 o to 90 o using Cukα ( λ = 1.54056 Å ) radiation are shown in Fig.4. If we compare the sharpness of the peaks of these two spectra we observe that the peaks are very sharp in case of uncapped silver nanoparticles as compared to capped ones, indicating the size of uncapped silver nanoparticles is high and this is because of absence of chitosan molecules on the surface.…”