We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic... more We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic-layer-deposition of TiO2 on a custom made, defect-free, nanoporous alumina membrane. The nanoporous alumina membrane (NAM) templates were fabricated via a modified two step anodization of aluminum using sulfuric acid as an electrolyte.
In the collagen-tailed forms of cholinesterases, each subunit of a specific triple helical collag... more In the collagen-tailed forms of cholinesterases, each subunit of a specific triple helical collagen, ColQ, may be attached through a proline-rich domain (PRAD) situated in its N-terminal noncollagenous region, to tetramers of acetylcholinesterase (AChE) or butyrylcholinesterase (BChE). This heteromeric assembly ensures the functional anchoring of AChE in extracellulare matrices, for example, at the neuromuscular junction. In this study, we analyzed the influence of deletions in the noncollagenous C-terminal region of ColQ on its capacity to form a triple helix. We show that an 80-residue segment located downstream of the collagenous regions contains the trimerization domain, that it can form trimers without the collagenous regions, and that a pair of cysteines located at the N-boundary of this domain facilitates oligomerization, although it is not absolutely required. We further show that AChE subunits can associate with nonhelical collagen ColQ monomers, forming ColQ-associated tet...
2010 20th International Conference on Electronics Communications and Computers (CONIELECOMP), 2010
Zinc oxide thin films are becoming increasingly popular for their wide range of properties and th... more Zinc oxide thin films are becoming increasingly popular for their wide range of properties and the ability to deposit these films on organic substrates for applications such as biotemplating, OLEDs, or deposition on fabrics for functionalization purposes including power generation from the flexing and deformation of wearable textiles. However, since many fabrics and other organic substrates can not survive the typically high temperatures of thin film growth, it is important to characterize and understand the dependence of the properties of these films as a function of temperature deposition and subsequent thermal treatments. We report on the properties of zinc oxide thin films grown by Atomic Layer Deposition (ALD) and the dependence of surface roughness, film stress, surface energy and crystalline structure on deposition temperature.
Ferroelectric BaTiO3 thin films were integrated directly on metallic Ni tapes by using pulsed las... more Ferroelectric BaTiO3 thin films were integrated directly on metallic Ni tapes by using pulsed laser for energy harvesting applications. Microstructure studies from x-ray diffraction and electron microscopy indicate that the as-grown BaTiO3 thin films have pure BaTiO3 crystal phase which consists of the crystalline assemblage of nanopillars with average cross sections from 100 nm to 200 nm directly on the
2013 7th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, 2013
ABSTRACT We develop fully dynamic expressions for the parallel and transverse components of the p... more ABSTRACT We develop fully dynamic expressions for the parallel and transverse components of the polarizability tensor characterizing circular cylinders of arbitrary electrical size and material properties. Our results show the importance of spatial dispersion effects in modeling cylindrical rods within the dipolar approximation, and extend the range of validity of existing models to arbitrary incidence angle and moderately large electrical sizes. We have also derived passivity conditions for all the components of the polarizability tensor and arbitrary incidence angle, which are satisfied by our expressions. Finally, we numerically study the effect of size and material variation on the relevant polarizability components, and we apply our formulation to analyze the effective parameters of uniaxial metamaterials composed of arrays of cylindrical rods. We expect that this result may be applied to the correct modeling of artificial uniaxial materials and their applications.
We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic... more We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic-layer-deposition of TiO 2 on a custom made, defect-free, nanoporous alumina membrane. The nanoporous alumina membrane (NAM) templates were ...
ABSTRACT We report radial, p–n junction, sub-micrometre, pillar array textured solar cells, fabri... more ABSTRACT We report radial, p–n junction, sub-micrometre, pillar array textured solar cells, fabricated on an n-type Czochralski silicon wafer. Relatively simple processing schemes such as metal-assisted chemical etching and spin on dopant techniques were employed for the fabrication of the proposed solar cells. Atomic layer deposition (ALD) grown aluminum oxide (Al2O3) was employed as a surface passivation layer on the B-doped emitter surface. In spite of the fact that the sub-micrometre pillar array textured surface has a relatively high surface-to-volume ratio, we observed an open circuit voltage (VOC) and a short circuit current density (JSC) as high as 572 mV and 29.9 mA cm−2, respectively, which leads to a power conversion efficiency in excess of 11.30%, for the optimized structure of the solar cell described herein. Broadband omnidirectional antireflection effects along with the light trapping property of the sub-micrometre, pillar array textured surface and the excellent passivation quality of the ALD-grown Al2O3 on the B-doped emitter surface were responsible for the enhanced electrical performance of the proposed solar cells.
We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic... more We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic-layer-deposition of TiO2 on a custom made, defect-free, nanoporous alumina membrane. The nanoporous alumina membrane (NAM) templates were fabricated via a modified two step anodization of aluminum using sulfuric acid as an electrolyte.
In the collagen-tailed forms of cholinesterases, each subunit of a specific triple helical collag... more In the collagen-tailed forms of cholinesterases, each subunit of a specific triple helical collagen, ColQ, may be attached through a proline-rich domain (PRAD) situated in its N-terminal noncollagenous region, to tetramers of acetylcholinesterase (AChE) or butyrylcholinesterase (BChE). This heteromeric assembly ensures the functional anchoring of AChE in extracellulare matrices, for example, at the neuromuscular junction. In this study, we analyzed the influence of deletions in the noncollagenous C-terminal region of ColQ on its capacity to form a triple helix. We show that an 80-residue segment located downstream of the collagenous regions contains the trimerization domain, that it can form trimers without the collagenous regions, and that a pair of cysteines located at the N-boundary of this domain facilitates oligomerization, although it is not absolutely required. We further show that AChE subunits can associate with nonhelical collagen ColQ monomers, forming ColQ-associated tet...
2010 20th International Conference on Electronics Communications and Computers (CONIELECOMP), 2010
Zinc oxide thin films are becoming increasingly popular for their wide range of properties and th... more Zinc oxide thin films are becoming increasingly popular for their wide range of properties and the ability to deposit these films on organic substrates for applications such as biotemplating, OLEDs, or deposition on fabrics for functionalization purposes including power generation from the flexing and deformation of wearable textiles. However, since many fabrics and other organic substrates can not survive the typically high temperatures of thin film growth, it is important to characterize and understand the dependence of the properties of these films as a function of temperature deposition and subsequent thermal treatments. We report on the properties of zinc oxide thin films grown by Atomic Layer Deposition (ALD) and the dependence of surface roughness, film stress, surface energy and crystalline structure on deposition temperature.
Ferroelectric BaTiO3 thin films were integrated directly on metallic Ni tapes by using pulsed las... more Ferroelectric BaTiO3 thin films were integrated directly on metallic Ni tapes by using pulsed laser for energy harvesting applications. Microstructure studies from x-ray diffraction and electron microscopy indicate that the as-grown BaTiO3 thin films have pure BaTiO3 crystal phase which consists of the crystalline assemblage of nanopillars with average cross sections from 100 nm to 200 nm directly on the
2013 7th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, 2013
ABSTRACT We develop fully dynamic expressions for the parallel and transverse components of the p... more ABSTRACT We develop fully dynamic expressions for the parallel and transverse components of the polarizability tensor characterizing circular cylinders of arbitrary electrical size and material properties. Our results show the importance of spatial dispersion effects in modeling cylindrical rods within the dipolar approximation, and extend the range of validity of existing models to arbitrary incidence angle and moderately large electrical sizes. We have also derived passivity conditions for all the components of the polarizability tensor and arbitrary incidence angle, which are satisfied by our expressions. Finally, we numerically study the effect of size and material variation on the relevant polarizability components, and we apply our formulation to analyze the effective parameters of uniaxial metamaterials composed of arrays of cylindrical rods. We expect that this result may be applied to the correct modeling of artificial uniaxial materials and their applications.
We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic... more We report the the micromanufacture and testing of dye-sensitized-solar-cells employing the atomic-layer-deposition of TiO 2 on a custom made, defect-free, nanoporous alumina membrane. The nanoporous alumina membrane (NAM) templates were ...
ABSTRACT We report radial, p–n junction, sub-micrometre, pillar array textured solar cells, fabri... more ABSTRACT We report radial, p–n junction, sub-micrometre, pillar array textured solar cells, fabricated on an n-type Czochralski silicon wafer. Relatively simple processing schemes such as metal-assisted chemical etching and spin on dopant techniques were employed for the fabrication of the proposed solar cells. Atomic layer deposition (ALD) grown aluminum oxide (Al2O3) was employed as a surface passivation layer on the B-doped emitter surface. In spite of the fact that the sub-micrometre pillar array textured surface has a relatively high surface-to-volume ratio, we observed an open circuit voltage (VOC) and a short circuit current density (JSC) as high as 572 mV and 29.9 mA cm−2, respectively, which leads to a power conversion efficiency in excess of 11.30%, for the optimized structure of the solar cell described herein. Broadband omnidirectional antireflection effects along with the light trapping property of the sub-micrometre, pillar array textured surface and the excellent passivation quality of the ALD-grown Al2O3 on the B-doped emitter surface were responsible for the enhanced electrical performance of the proposed solar cells.
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