5 research outputs found
Molecular-Controlled Fracture and Release of Templated Nanoporous Organosilicate Thin Films
Molecular interactions between templating porogen particles and the underlying substrate can be exploited to create a controlled release mechanism while maintaining the bulk properties of the matrix material. Furthermore, these interactions can be reversed by priming the substrate with a hydrophobic layer to produce a strong interface with a nanoporous layer
Defects in Cu(In,Ga)Se2 chalcopyrite semiconductors : A comparative study of material properties, defect states, and photovoltaic performance
Homogeneous Surface Oxidation of Organosilicates by Controlled Combustion of Adsorbed Fuels: A Facile Method for Low-Temperature Processing
We
have developed a method for the oxidation of organosilicate
materials at temperatures considerably lower than those typically
required for uncatalyzed oxidation. The process utilizes a combustible
fuel delivered to the surface in an oxidizing environment to locally
oxidize materials with carbon–silicon bonds. It also provides
a level of control that cannot be achieved
through standard high-energy top-to-bottom oxidative procedures such
as UV–ozone and O<sub>2</sub> plasmas. While the latter processes
attack the outer interface, local oxidation can be achieved using
our process by manipulating the distribution of the combustible fuel.
We use this technique to generate oxidized porous organosilicate films
with either a sharp oxidation front or uniform oxidation where the
relative carbon content can be controlled through the film thickness
depending on processing conditions. Further, we show that this process
can also be used to seal bulk interconnected microporosity in films
(<1
nm) without substantially changing the refractive index of the material.
For both the nominally dense and porous films, the surface oxidation
is accompanied by an increase in the Young’s modulus and the
oxidized films can be readily functionalized using standard silane
chemistry to provide a variety of chemical functionalities