Results 111 to 120 of about 391 (161)

Peptide ormosils as cellular substrates

Journal of Materials Chemistry, 2007
Peptide-functionalized thin films exhibit significant potential for integration into implantable devices and cell-based technologies. A new type of neuroactive peptide-modified silica was developed using sol–gel reaction chemistry to produce thin films from four different peptide silane precursors.
Jedlicka, Sabrina, Little, Kenneth M, Nivens, David E, Zemlyanov, Dmitry, Rickus, Jenna L   +4 more
openaire   +2 more sources

Tribological properties of ormosil coatings

Journal of Sol-Gel Science and Technology, 1996
Transparent plastics are not scratch resistant. The damage leads to a loss of optical properties. Coatings prepared using either tetraethoxysilane or colloidal silica particles embedded in “glymo” is a way to avoid these disadvantages. Tribological experiments are carried out to better understand the surface modification due to a sliding friction.
P. Etienne, J. Denape, J. Y. Paris, J. Phalippou, R. Sempere   +4 more
openaire   +1 more source

Dynamic studies of Ormosil membranes

Journal of Non-Crystalline Solids, 2008
Abstract With the help of nuclear magnetic resonance (NMR) and quasi-elastic neutron scattering (QENS) we have carried out dynamic studies of Ormosil membranes presenting protonic conductivity properties. These nanocomposite hybrid materials prepared by sol–gel process are based on an organic–inorganic network [polymer chains (poly(propylene glycol),
K. Maver, U. Lavrenčič Štangar, P. Judeinstein, J.M. Zanotti   +3 more
openaire   +1 more source

Multifunctional ORMOSIL and PAA nanoparticles

SPIE Proceedings, 2009
Various problems arising during molecular imaging of different fluoroprobes and metabolites used in PDT can be circumvented by focusing on multifunctional therapy agents. Thus an effective photo sensitizer coupled with other useful roles to play in PDT treatment make nanoparticles as a good vehicle for different delivery assuming multifunctional ...
Anurag Gupta, K. V. R. Rao, Paula Pera, Shouyan J. Wang, Joseph R. Missert, Tymish Ohulchanskyy, Indrajit Roy, Janet Morgan, Paras N. Prasad, Raoul Kopelman, Ravindra K. Pandey   +10 more
openaire   +1 more source

Two Photon Polymerization of Ormosils

AIP Conference Proceedings, 2010
In this work, 3D structures of hybrid polymers—ORMOSILS (organically modified silicates) were produced via Two Photon Polymerization (2PP) of hybrid methacrylates based on silane derivates.Synthetic routes have been used to obtain series of hybrid monomers, their structure and purity being checked by NMR Spectroscopy and Fourier Transform Infrared ...
A. Matei, M. Zamfirescu, F. Jipa, C. Luculescu, M. Dinescu, E. C. Buruiana, T. Buruiana, L. E. Sima, S. M. Petrescu, Claude Phipps   +9 more
openaire   +1 more source

Ormosil coatings of high hardness

Journal of Materials Science, 1995
Organically modified silicates (ormosils) of two systems were coated on polyethyleneterephthalate (PET) substrates. One was the tetraethoxysilane (TEOS)-vinyltriethoxysilane (VTES) system and the other was the TEOS-tetraisopropyltitanate (TIPT)-VTES system. The reactions among the alkoxides were examined by liquid state 29Si nuclear magnetic resonance (
T. Iwamoto, J. D. Mackenzie
openaire   +1 more source

Viscosity and structure of Ormosil solutions

Journal of Sol-gel Science and Technology, 1995
PDMS (polydimethylsiloxane)/TEOS (tetraethoxysilane) system Ormosils (organically modified silicates) can be rubbery or rigid, depending on their chemical composition and processing conditions. In order to determine the relationship between the viscosity and the structure of the Ormosil solutions through the sol-to-gel transition, five kinds of sols ...
Yasukazu Hoshino, John D. Mackenzie
openaire   +1 more source

Effects of Temperature on Properties of Ormosils

MRS Proceedings, 1996
Organically modified silicates, the so-called Ormosils, based on silica (SiO2) and polydimethylsiloxane (PDMS), can have wide variations of mechanical properties depending on their chemical compositions and processing variables. The random network of the SiO2 is structurally modified by the reactive incorporation of PDMS chains to give materials ...
J. D. Mackenzie, Q. Huang, F. Rubio-Alonso, S. J. Kramer   +3 more
openaire   +1 more source

Dermal cells distribution on laser‐structured ormosils

Journal of Tissue Engineering and Regenerative Medicine, 2011
Several dermal substitutes for skin grafting are now commercially available, although their performance still needs improvement. Most artificial dermises have a lower take rate than autologous grafts and require more time for sufficient vascular ingrowth to overlay the skin graft.
L E, Sima, E C, Buruiana, T, Buruiana, A, Matei, G, Epurescu, M, Zamfirescu, A, Moldovan, S M, Petrescu, M, Dinescu   +8 more
openaire   +2 more sources

Optical rubbery ormosils sensor for the detection of ammonia

Fresenius' Journal of Analytical Chemistry, 2001
Rubbery ormosil films with immobilized aminofluorescein (AF) were investigated to develop an optochemical sensor for the determination of ammonia in water. The gel precursors with tetramethoxysilane (TMOS) and dimethyldimethoxysilane (DiMeDMOS) were deposited on glass supports, and characterized in terms of response to pH, and to dissolved ammonia at ...
Chen, X, Dai, YJ, Li, Z, Zhang, ZX, Wang, XR   +4 more
openaire   +3 more sources