Abstract: Solid porous composite ZSM-5 materials comprising a generally vertical orientation of an array of pentacil-zeolite crystals on a porous substrate.

Abstract: Metal oxide nanoarrays, such as titanium oxide nanoarrays, having a platinum group metal dispersed thereon and methods of making such nanoarrays are described. The platinum group metal can be dispersed on the metal oxide nanoarray as single atoms. The nanoarrays can be used to catalyze oxidation of combustion exhaust.

Abstract: Manganese-cobalt (Mn—Co) spinel oxide nanowire arrays are synthesized at low pressure and low temperature by a hydrothermal method. The method can include contacting a substrate with a solvent, such as water, that includes Mn04- and Co2 ions at a temperature from about 60° C. to about 120° C. The method preferably includes dissolving potassium permanganate (KMn04) in the solvent to yield the Mn04- ions. the substrate is The nanoarrays are useful for reducing a concentration of an impurity, such as a hydrocarbon, in a gas, such as an emission source. The resulting material with high surface area and high materials utilization efficiency can be directly used for environment and energy applications including emission control systems, air/water purifying systems and lithium-ion batteries.

Abstract: Metal oxide nanoarrays, such as titanium oxide nanoarrays, having a platinum group metal dispersed thereon and methods of making such nanoarrays are described. The platinum group metal can be dispersed on the metal oxide nanoarray as single atoms. The nanoarrays can be used to catalyze oxidation of combustion exhaust.

Abstract: Manganese-cobalt (Mn—Co) spinel oxide nanowire arrays are synthesized at low pressure and low temperature by a hydrothermal method. The method can include contacting a substrate with a solvent, such as water, that includes Mn04- and Co2 ions at a temperature from about 60° C. to about 120° C. The method preferably includes dissolving potassium permanganate (KMn04) in the solvent to yield the Mn04- ions. the substrate is The nanoarrays are useful for reducing a concentration of an impurity, such as a hydrocarbon, in a gas, such as an emission source. The resulting material with high surface area and high materials utilization efficiency can be directly used for environment and energy applications including emission control systems, air/water purifying systems and lithium-ion batteries.

Abstract: A method of making a titanium dioxide nanowire array includes contacting a substrate with a solvent comprising a titanium (III) precursor, an acid, and an oxidant while microwave heating the solvent, thereby forming a hydrogen titanate H2Ti2O5.H2O nanowire array. The hydrogen titanate nanowire array is annealed to form a titanium dioxide nanowire array. The substrate is seeded with titanium dioxide before starting the hydrothermal synthesis of the hydrogen titanate nanowire array. The titanium dioxide nanowire array is loaded with a platinum group metal to form an exhaust gas catalyst. The titanium dioxide nanowire array can be used to catalyze oxidation of combustion exhaust.

Abstract: Manganese-cobalt (Mn—Co) spinel oxide nanowire arrays are synthesized at low pressure and low temperature by a hydrothermal method. The method can include contacting a substrate with a solvent, such as water, that includes MnO4- and Co2 ions at a temperature from about 60° C. to about 120° C. The method preferably includes dissolving potassium permanganate (KMnO4) in the solvent to yield the MnO4— ions. the substrate is The nanoarrays are useful for reducing a concentration of an impurity, such as a hydrocarbon, in a gas, such as an emission source. The resulting material with high surface area and high materials utilization efficiency can be directly used for environment and energy applications including emission control systems, air/water purifying systems and lithium-ion batteries.

Abstract: Metal oxide nanoarrays, such as titanium oxide nanoarrays, having a platinum group metal dispersed thereon and methods of making such nanoarrays are described. The platinum group metal can be dispersed on the metal oxide nanoarray as single atoms. The nanoarrays can be used to catalyze oxidation of combustion exhaust.

Abstract: A method of making a titanium dioxide nanowire array includes contacting a substrate with a solvent comprising a titanium (III) precursor, an acid, and an oxidant while microwave heating the solvent, thereby forming a hydrogen titanate H2Ti2O5.H2O nanowire array. The hydrogen titanate nanowire array is annealed to form a titanium dioxide nanowire array. The substrate is seeded with titanium dioxide before starting the hydrothermal synthesis of the hydrogen titanate nanowire array. The titanium dioxide nanowire array is loaded with a platinum group metal to form an exhaust gas catalyst. The titanium dioxide nanowire array can be used to catalyze oxidation of combustion exhaust.

Abstract: Materials, methods of making, and methods of using an apparatus for sensing. The apparatus includes an optical sensing platform; and metal oxide based nanowires incorporated into the optical sensing platform.

Abstract: A metal oxide nanorod array structure according to embodiments disclosed herein includes a monolithic substrate having a surface and multiple channels, an interface layer bonded to the surface of the substrate, and a metal oxide nanorod array coupled to the substrate surface via the interface layer. The metal oxide can include ceria, zinc oxide, tin oxide, alumina, zirconia, cobalt oxide, and gallium oxide. The substrate can include a glass substrate, a plastic substrate, a silicon substrate, a ceramic monolith, and a stainless steel monolith. The ceramic can include cordierite, alumina, tin oxide, and titania. The nanorod array structure can include a perovskite shell, such as a lanthanum-based transition metal oxide, or a metal oxide shell, such as ceria, zinc oxide, tin oxide, alumina, zirconia, cobalt oxide, and gallium oxide, or a coating of metal particles, such as platinum, gold, palladium, rhodium, and ruthenium, over each metal oxide nanorod.

Abstract: A method of making a nanotube array structure includes forming a nanorod array template on a substrate, coating a nanotube material over the nanorod array template, forming a coated template, annealing the coated template, and drying the coated template. The method then includes heating the coated template to an elevated temperature, relative to ambient temperature, at a heating rate while flowing a gas mixture including a reducing gas over the substrate at a flow rate, the reducing gas reacting with the nanorod array template and forming a gaseous byproduct and the nanotube array structure in which nanotubes may be substantially aligned with adjacent nanotubes. The nanotube array structure can be used, for example, in sensor, catalyst, transistor, or solar cell applications.

Abstract: A metal oxide nanorod array structure according to embodiments disclosed herein includes a monolithic substrate having a surface and multiple channels, an interface layer bonded to the surface of the substrate, and a metal oxide nanorod array coupled to the substrate surface via the interface layer. The metal oxide can include ceria, zinc oxide, tin oxide, alumina, zirconia, cobalt oxide, and gallium oxide. The substrate can include a glass substrate, a plastic substrate, a silicon substrate, a ceramic monolith, and a stainless steel monolith. The ceramic can include cordierite, alumina, tin oxide, and titania. The nanorod array structure can include a perovskite shell, such as a lanthanum-based transition metal oxide, or a metal oxide shell, such as ceria, zinc oxide, tin oxide, alumina, zirconia, cobalt oxide, and gallium oxide, or a coating of metal particles, such as platinum, gold, palladium, rhodium, and ruthenium, over each metal oxide nanorod.

Abstract: A method of providing miniaturized size down to nanoscale electronic materials, which may be easily incorporated into the future ever-scaling down power electronics, microelectronics and nanoelectronics device systems, is disclosed. A linear or nonlinear nanoparticle (nanowire) junction design that allows precise controllability over an electronic device (e.g., a varistor) performance, which is typically difficult for the traditional sintered bulk varistor, is also disclosed. A localized doping and chemical modulation, across junctions allows flexible and tunable design over the nanoscale grain boundary band engineering is further disclosed. Furthermore, a method of operating memory, using electrostatic potential modulated coding and decoding across periodic nanoparticle grain boundary linearly, is also disclosed.

Abstract: A method of providing miniaturized size down to nanoscale electronic materials, which may be easily incorporated into the future ever-scaling down power electronics, microelectronics and nanoelectronics device systems, is disclosed. A linear or nonlinear nanoparticle (nanowire) junction design that allows precise controllability over an electronic device (e.g., a varistor) performance, which is typically difficult for the traditional sintered bulk varistor, is also disclosed. A localized doping and chemical modulation, across junctions allows flexible and tunable design over the nanoscale grain boundary band engineering is further disclosed. Furthermore, a method of operating memory, using electrostatic potential modulated coding and decoding across periodic nanoparticle grain boundary linearly, is also disclosed.

Abstract: A method of providing miniaturized size down to nanoscale electronic materials, which may be easily incorporated into the future ever-scaling down power electronics, microelectronics and nanoelectronics device systems, is disclosed. A linear or nonlinear nanoparticle (nanowire) junction design that allows precise controllability over an electronic device (e.g., a varistor) performance, which is typically difficult for the traditional sintered bulk varistor, is also disclosed. A localized doping and chemical modulation, across junctions allows flexible and tunable design over the nanoscale grain boundary band engineering is further disclosed. Furthermore, a method of operating memory, using electrostatic potential modulated coding and decoding across periodic nanoparticle grain boundary linearly, is also disclosed.

Abstract: A method and corresponding system for providing a uniform nanowire array including uniform nanowires composed of at least three elements is presented. An embodiment of the method includes growing an array of two-element nanowires, and thereafter uniformly doping or alloying each two-element nanowire, with respect to each other two-element nanowire, with at least one doping or alloying element through a wet chemical synthesis with a precursor solution, to produce the uniform array of nanowires composed of at least three elements. The two-element nanowire can include Zn and O, and the at least one doping or alloying element can be Mg, Cd, Mn, Cu, Be, Fe, and Co. Applications of the three-element nanowire array include solar cells and light emitting diodes with improved efficiencies over existing technologies.