Optical Properties of Au/SiO<SUB>2</SUB> Nano-Composite Films Prepared by Induction-Coil-Coupled Plasma Sputtering

Abstract

Au/SiO 2 nano-composite thin films with 3 to 65 vol% Au were prepared by induction-coil-coupled plasma sputtering, and the effect of heat-treatment on the nano-structure and optical property of the films were investigated. The mean diameter of the Au particles in the asdeposited films was about 8 nm and increased from 10 to 30 nm after the heat treatments at 900 C. The optical absorption was greatly improved by the heat-treatment due to the increase of Au particle sizes. At the heat-treatment of 900 C, Au/SiO 2 films containing 3 to 65 vol% Au showed absorption peaks at the wavelength of 540 to 560 nm, while no absorption peak was observed in the as-deposited films containing more than 12 vol% Au. The intensity of the absorption peak for the Au/SiO 2 films heat treated at 900 C increased with increasing Au content, showing a maximum value around the Au content of 37 vol%.

On the synthesis and characterisation of luminescent hybrid particles: Mo6 metal cluster complex/SiO2

“…S13-S15 †), the typical halo patterns of SiO 2 glass at around 22 C were observed. 43,44 The increased cluster content above x ¼ 0.1 in the particles prepared from 2 and 3 led to both the weakening of the halo peak and the appearance of the new reection peaks, which corresponded to those found in diffraction patterns of precipitates A2 and B3, respectively. Namely, in the diffraction prole of 2 x @SiO 2 , there was a broad halo peak around 11.7 C, which narrowed with the increase in cluster loading of the SMPs.…”

Влияние Перколяционного Перехода На Электропроводящие И Оптические Свойства Сверхтонких Металлических Пленок

“…Последний постулат является следствием того, что при постоянной скорости объем осажденного металла пропорционален времени. Таким образом, для Ti получена функция перехода x Ti = 0.029t 2/3 , а для Ptx Pt = 0.014t При уменьшении толщины пленки в спектрах пропускания появляется характерный минимум, обусловленный поглощением на локализованных плазмонах [22]. По мере уменьшения толщины покрытия положение плазмонного резонанса смещается в "…”

“…3. Как видно из рисунка, для наиболее толстого участка пленки спектр пропускания соответствует спектру сплошной пленки Au[22].…”

Preparation of multi‐walled carbon nanotubes/SiO 2 core–shell nanocomposites by a two‐step Stöber process

“…Among a large number of inorganic nanoparticles, silica particles have been widely chosen for both research and industry because of their excellent optical, electrical and thermal properties [27][28][29]. They are widely used in many fields, such as thixotropic agents, thermal insulators, composite fillers, drug delivery, and paints [30].…”