Synthesis of silver clusters in silica-based glasses for optoelectronics applications

Borsella, E.; Cattaruzza, Elti; Marchi, G. De; Gonella, Francesco; Mattei, Giovanni; Mazzoldi, P.; Quaranta, A.; Battaglin, Giancarlo; Polloni, R.

doi:10.1016/s0022-3093(98)00878-3

Cited by 92 publications

(52 citation statements)

References 11 publications

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“…Such broadening corresponds to the thermal diffusion of the Ag concentration and has been previously reported for Ag in glass matrix produced by ion-exchange process [25,26]. The broadening of Ag concentration reduces the increase of refractive index in the Agcontaining region, what explains the vanishing of interference fringes upon increase of T ANNEAL .…”

Section: Discussionsupporting

confidence: 65%

“…As a consequence, the SPR for very small particles is red-shifted from that of bulk metal, as observed experimentally. The formation of nanoparticles by annealing at normal atmosphere requires the reduction of Ag ions and their subsequent clustering [26]. In this sense, high annealing temperatures have to be supplied for particle formation compared to annealing at hydrogen atmosphere, where due to the presence of a reducing agent lower temperatures suffice [26].…”

Section: Discussionmentioning

confidence: 99%

“…The formation of nanoparticles by annealing at normal atmosphere requires the reduction of Ag ions and their subsequent clustering [26]. In this sense, high annealing temperatures have to be supplied for particle formation compared to annealing at hydrogen atmosphere, where due to the presence of a reducing agent lower temperatures suffice [26]. Owing to the thermal diffusion of silver through the glass, the concentration of silver is low (~ 0.4 % as shown by RBS), justifying that the optical properties of the glass containing particles can be well described by the Mie theory and interaction between particles can be neglected.…”

Section: Discussionmentioning

confidence: 99%

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Optical and structural properties of silver nanoparticles in glass matrix formed by thermal annealing of field assisted film dissolution

Sancho‐Parramon

Janicki²,

Dubček³

et al. 2010

Optical Materials

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A two-step procedure for the formation of silver nanoparticles embedded in a glass matrix is studied. The procedure consists of: i) the inclusion of silver ions in the glass matrix by electric field assisted dissolution of Ag film deposited on the glass and ii) the aggregation of silver by thermal annealing. The optical properties of the sample, dominated by the surface plasmon resonance of metal nanoparticles in the visible spectral range, are studied by optical spectroscopy. The structural characterization is carried out by grazing-incidence small-angle X-ray scattering measurements performed at the Synchrotron Elettra (Italy) and silver depth profiles are determined using Rutherford backscattering. The results suggest that the depth profile of Ag might be tailored by modification of the parameters of metal film dissolution (electric field and temperature). Variation of thermal annealing parameters (temperature and time) allows control of the nanoparticles size. Thus, the surface plasmon absorption intensity and line shape is changed, enabling tuning of the optical properties of the sample.

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Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Optical and structural properties of silver nanoparticles in glass matrix formed by thermal annealing of field assisted film dissolution

Sancho‐Parramon

Janicki²,

Dubček³

et al. 2010

Optical Materials

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“…The most plausible explanation for this problem is the fact that the emitted silver ions remain in the immediate vicinity of the silver clusters, producing a rather high local concentration of Ag + -ions; for such a situation strong luminescence quenching was observed [12]. In addition, the non-irradiated samples containing Ag nanoparticles still show a relatively intense emission at 520 nm due to the residual free silver ions in the sample, which is present after annealing in reduction atmosphere (where the formation of silver species is limited and emission at 600 nm was not detected [17]) and formation of silver clusters, but also after laser irradiation and repeated annealing (Fig. 3).…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Ionization and photomodification of Ag nanoparticles in soda-lime glass by 150 fs laser irradiation: a luminescence study

Podlipensky

Гребенев

Seifert

et al. 2004

Journal of Luminescence

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“…On the other hand, several reports [13,14,15,16] on different kind of glasses with incorporation of Ag by melting and some other glasses prepared by the sol-gel route, only the nucleation kinetics and growth of the Ag particles were observed; however, the glass structure was not affected, that is, some kind of the SiO 2 crystallizations, never observed. Solgel a low temperature process, also provides easy control of silver concentration and the possibility of adding reducing and oxidizing agents in small concentrations to modify the chemical state of silver.…”

Section: Introductionmentioning

confidence: 91%

Evolución estructural del sistema SiO<sub>2</sub>-Ag preparado por el proceso Sol-Gel con incorporación de partículas de Ag

Romo¹,

Torres²,

Flores³

et al. 2011

Bol. Soc. Esp. Ceram. Vidr.

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Structural evolution of Sol-Gel glasses in powder form and coatings with incorporation of Ag particles at the starting solution showed an evolution from SiO 2 amorphous matrix to the cristobalite phase with the annealing treatment at around 800 ºC for one hour. This structural evolution was obtained at lower Ag concentration up 0.7 %vol. Two series of samples were studied, A) series using HNO 3 and B) series using HCl as catalytic agent; in both series grenetine was used as a dispersing agent to avoid the precipitation of Ag particles. We found the incorporation of silver in the xerogeles matrix promotes the devitrification process at relatively low temperatures with the presence of partial crystallization in form of cistobalite. This structure was produced by controlling the catalytic agent quoted in the preparation process. The EPR and UV-Vis absorption spectra show the presence of Fe 3+ ions as a contaminant in the source of the Ag particles, due to the process to obtain these particles. By means the IR spectra a high (OH -) concentration at higher temperatures was observed in this system, until 600 ºC at difference of the sol-gel glasses made with incorporation of Ag particles by nitrates. The color evolution of the coating samples with the annealing temperature varies from a light brown at 100 ºC to yellow at 500 ºC. Keywords: sol-gel, Ag particles, cristobaliteEvolución estructural del sistema SiO 2 -Ag preparado por el proceso Sol-gel con incorporación de partículas de Ag.La evolución estructural de vidrios de Sol-Gel en forma de polvos y recubrimientos preparados con la incorporación de partículas de Ag a partir de la solución precursora muestra la evolución de la matriz amorfa de SiO 2 a la fase cristobalita utilizando tratamientos térmicos alrededor de 800 °C por un tiempo de una hora. Dicha evolución estructural fue obtenida en concentraciones bajas a partir de 0.7% de Ag. Dos series de muestras fueron estudiadas, la serie A) usando HNO 3 y la serie B) usando HCl como agente catalítico; en ambas series se uso grenetina como agente dispersante para evitar la precipitación de las partículas de Ag. Nosotros encontramos que la incorporación de plata en la matriz de los xerogeles promueve el proceso de desvitrificación a temperaturas relativamente bajas con la presencia de una cristalización parcial en forma de cristobalita. Esta estructura fue producida controlando el agente catalítico mencionado en el proceso de preparación. Los espectros de EPR y absorción UV-Vis muestran la presencia de iones Fe 3+ como un contaminante proveniente de las partículas de Ag, debido al proceso en el que fueron obtenidas las partículas. Por medio de espectroscopía IR se observo que en el sistema hay una alta concentración de (OH -) a temperaturas altas, hasta 600 ºC a diferencia de los vidrios producidos por sol-gel con la incorporación de partículas de Ag en forma de nitratos. La evolución del color en muestras con el recubrimiento con el tratamiento térmico varía de café ligero a 100 ºC hasta amarillo a 500 ºC.

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Synthesis of silver clusters in silica-based glasses for optoelectronics applications

Cited by 92 publications

References 11 publications

Optical and structural properties of silver nanoparticles in glass matrix formed by thermal annealing of field assisted film dissolution

Optical and structural properties of silver nanoparticles in glass matrix formed by thermal annealing of field assisted film dissolution

Ionization and photomodification of Ag nanoparticles in soda-lime glass by 150 fs laser irradiation: a luminescence study

Evolución estructural del sistema SiO<sub>2</sub>-Ag preparado por el proceso Sol-Gel con incorporación de partículas de Ag

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