A novel route to control refractive index of sol-gel derived nano-porous silica films used as broadband antireflective coatings

Changes in Fluorescent Emission Due to Non‐covalent Interactions as a General Detection Procedure for Thin‐Layer Chromatography

“…According to these values, when changing the refractive index from that of vacuum (n = 1) to that of one of these long chain alkanes, we would obtain a two-fold increase in the radiative decay rate in all cases. Although not as low as vacuum, silica gel has low refractive index; [19,20] typical values for mesoporous silica gel films are around n = 1.18 and, in this case, when the fluorophore is surrounded by these alkanes with n values between 1.42 and 1.45, k r would be increased by a factor of 1.5 according to Equation (9). On the other hand, Figure 5 shows, as an example under our working conditions, experimental data in which, approximately, we obtain between a two-and a fivefold fluorescence increase in the presence of analyte.…”

Formation and investigation of porous SiO2films on Si

“…The rectangular-shaped particles of size ∼50 × 50 nm 2 and ∼50 nm in height are crystallized on the rough surface. The regularly-shaped nanosized particles are characteristic of silica layers produced by the sol-gel spin-on technique and annealed in Ar, in contrast to amorphous silica layers obtained by dip coating and annealed in air [15].…”

Preparation of sol–gel ZrO2–SiO2 highly reflective multilayer films and laser-induced damage threshold characteristic

“…For the preparation of silica sols [8], TEOS, NH 3 . H 2 O, and ethanol were mixed at room temperature with proper molar ratio and then aged at room temperature for ∼10 days.…”

“…Up to now, much work has been devoted to the description of the preparation and optical properties of multilayer system made of successive thin films of ZrO 2 -SiO 2 [3][4][5][6][7][8] . In the present work, sol-gel (ZrO 2 /SiO 2 ) 12 ZrO 2 films were prepared by spin coating method.…”