Inventions & Patents
M. Sowwan, A.J. Porkovich, J. Vernieres, and Z. Ziadi
A system and method of nanoparticle deposition for achieving an acetone sensitive response based on ruthenium decorated CuO nanowires at temperatures of 200°C and 250°C is disclosed. This method is useful for building sensors. The method used to build the sensor is easily integrable into silicon technology broadly, and into a CMOX compatible device specifically. Additionally, it is expected that this method of nanoparticle deposition can be transferred to other MOx nanowire sensors, such as but not limited to zinc oxide nanowire.
J.-H. Kim, M. Bohra, V. Singh, A. Galea, P. Grammatikopoulos, and M. Sowwan
A two-dimensional nano-sheet that is foldable in response to a surrounding pH value includes a polyethyleneimine (PEI) chain taking a two-dimensional form; and a plurality of domains made of gold, attached to the PEI chain, the plurality of domains of gold forming a percolating gold film on the PEI chain.
S. Steinhauer, V. Singh, and M. Sowwan
A method for manufacturing nanoparticle decorated nanowires by a vacuum deposition system having a deposition chamber and an aggregation chamber connected thereto includes: mounting a metal member in the deposition chamber; performing thermal oxidization of the metal member in the deposition chamber in an oxygen atmosphere so as to grow metal oxide nanowires on a surface of the metal member; without breaking vacuum in the vacuum deposition system, generating a vapor of a catalytic metal particles clusters in the aggregation chamber that is connected to the deposition chamber; and without breaking vacuum in the vacuum deposition system, transporting the generated catalytic metal particles clusters to the deposition chamber so as to decorate the metal oxide nanowires with catalytic metal nanoparticles made of the catalytic metal particles.
4. Engineering high-performance palladium core magnesium oxide porous shell nanocatalysts via heterogeneous gas-phase synthesis
M. Sowwan, C. Cassidy, and V. Singh
A novel catalyst includes a plurality of nanoparticles, each nanoparticle including a core made of a catalytic metal and a porous shell surrounding the core, made of metal oxide, the porous shell preserving a catalytic function of the core and reducing reduction of the core and coalescence of the nanoparticles.
3. Design and assembly of graded-oxide tantalum porous films from size-selected nanoparticles and dental and biomedical implant application thereof
A porous film made of size-selected tantalum nanoparticles is formed on a substrate, the porous film having a graded oxidation profile perpendicular to a surface of the substrate.
V. Singh, C. Cassidy, and M. Sowwan
A method of forming crystallized semiconductor particles includes: forming amorphous semiconductor particles in a vacuumed aggregation chamber; transporting the amorphous semiconductor particles formed in the vacuumed aggregation chamber to a vacuumed deposition chamber within which a substrate is held; and applying a vapor of a metal catalyst to the amorphous semi-conductor particles while still in transit to the substrate in the vacuumed deposition chamber to induce crystallization of at least portion of the amorphous semiconductor particles via the metal catalyst in the transit, thereby depositing the crystallized semiconductor particles with the metal catalyst attached thereto onto the substrate.
J. Vernieres, M. Benelmekki, J.-H. Kim, R. E. Diaz, and M. Sowwan
A soft magnetic nanoparticle comprising an iron aluminide nanoalloy of the DO3 phase as a core encapsulated in an inert shell made of alumina.