Grafting of trialkoxysilane on the surface of nanoparticles by conventional wet alcoholic and supercritical carbon dioxide deposition methods

Ultrabubble: A Laminated Ultrasound Contrast Agent with Narrow Size Range

“…[21] In contrast, quite ordered hydrophobic or oleophobic films have been derived from long-methylene-chain trialkoxysilanes like OTES, self assembled on planar surfaces, although on nano-and microparticles, the self-assembly is not preferred in solvent deposition, and the integrity of any layer formation is reported as difficult to control. [22] In the case of the capsule synthesis here, the resultant hollow capsules could be distinguished in the SEM as rigid sphere, microballon, or microcapsule ( Fig. 1d and e).…”

Spectroscopic characterisation of hydroxyapatite and nanocrystalline apatite with grafted aminopropyltriethoxysilane: nature of silane–surface interaction

“…6b) exhibited broader apatitic phosphate bands without shifting and a decrease of the relative intensity of OH -vibration bands of the apatitic structure (disappearance for NCA). For the NCA sample, which exhibited higher silane content, specific APTES bands were observed: new broad bands at 2950 and 2850 cm -1 ascribed to asymmetric and symmetric stretching modes of CH 2 and CH 3 groups of the aminopropyl chain, respectively [8]; weak bands at 1460 and 1330 cm -1 corresponding to asymmetric and symmetric C-H bending deformation bands, respectively [8]; and a series of bands related to N-H stretching modes of the primary amine in the range of 3500-3000 cm -1 and a band owed to the N-H group deformation at 1620 cm -1 , both of which can be overlapped by water vibrations [8,16,35]. The characteristic bands of grafted silane were less intense on the HAP-Si and HAPD-Si spectra than on the NCA-Si spectrum because of the lower quantities of grafted silane.…”

Nanomaterials based upon silylated layered double hydroxides

“…The excellent anionic exchange capacity makes these materials suitable for adsorbents, ion exchangers, pharmaceutics, catalysts or catalyst supports, etc. [7][8][9][10][11][12][13]. There are many studies on the modification of the surfaces of cationic clays, for example, smectite group minerals and minerals from the serpentine group [14][15][16].…”