One-step sol–gel preparation of PDMS–silica ORMOSILs as environment-resistant and crack-free thick antireflective coatings

PDMS-SiO2-TiO2-CaO hybrid materials – Cytocompatibility and nanoscale surface features

“…1) the Young contact angle θY was found to be 91.2°. This result is in agreement with the ones reported in the literature [52], considering the amount of PDMS used in the present work in the preparation of the samples and the values of contact angle referred for PDMS itself, 100° < θY < 110° [52,65].…”

“…These results agree with the assumption that longer PDMS chains link silica domains, creating a hydrophobic surface as confirmed by NMR and SAXS measurements, also in agreement with a structural model proposed by Zhang et al [52,51] where PDMS chains act as bridges between the surface of silica nano particles. …”

A biocompatible hybrid material with simultaneous calcium and strontium release capability for bone tissue repair

“…Heterogeneities diameter, D, was calculated assuming that they have a spherical geometry and using the following equation D = 2(5/3) 1/2 Rg. The values in Table 1 show that the heterogeneities diameter, D, similar in both C10 and C5S5 samples (around 100 Å diameter), are close to the values published for secondary particles in PDMS-SiO 2 hybrid systems [16,39]. The fractal dimension β, characteristic of the power law regime associated to those heterogeneities, indicate that they can be described by a mass fractal, with β ≈3.…”

Synthesis and characterization of silica nanostructures for cotton leaf worm control

“…The FTIR spectra of synthesized SiO 2 nanostructures are almost the same as commercial SiO 2 . The strong and weak bands are centered at 1079, 799, and 459 cm -1 ; these bands are attributed to the Si-O-Si bond corresponding to bending and stretching vibrations, respectively [28]. The absorption bands at 2856 cm -1 and at 2927 cm -1 for SiO 2 -CTAB sample are assigned to -CH 2 group of CTAB.…”