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Results 2326–2350 of 2,458

Tunable light source for use in photoacoustic spectrometers

Patent • #6,975,402. The present invention provides a photoacoustic spectrometer that is field portable and capable of speciating complex organic molecules in the gas phase. The spectrometer has a tunable light source that has the ability to resolve the fine structure of these molecules over a large wavelength range. The inventive light...

Tunable metal-organic framework compositions and methods thereof

Patent • #11,007,516. The present invention relates to a metal-organic framework composition, as well as constructs and methods thereof. In one particular example, the composition provides a platform having an emission signal in the deep red to near-infrared (NIR) region.

Tunable negative coefficient thermal expansion materials and composites

Patent • #11840459. The present disclosure is directed to variable composition ceramics. Zr(2−x)Hf(x)WP2O12 and Hf2WP2O12 exhibit large negative thermal expansion that is linear over a large temperature range up to at least 900° C., These new ceramic material particles may be mixed with polymers to make a composite suitable for use in...

Tunable plasmonic crystal

Patent • #9,105,791. A tunable plasmonic crystal comprises several periods in a two-dimensional electron or hole gas plasmonic medium that is both extremely subwavelength (.about..lamda./100) and tunable through the application of voltages to metal electrodes. Tuning of the plasmonic crystal band edges can be realized in materials such as semiconductors and graphene...

Tunable surface plasmon devices

Patent • #8,009,356. A tunable extraordinary optical transmission (EOT) device wherein the tunability derives from controlled variation of the dielectric constant of a semiconducting material (semiconductor) in evanescent-field contact with a metallic array of sub-wavelength apertures. The surface plasmon resonance wavelength can be changed by changing the dielectric constant of the dielectric...

Tunable Surface Plasmon Infrared Modulator

Featured Opportunity • There is a need for improved active infrared optical elements such as modulators. Extraordinary optical transmission (EOT) through subwavelength apertures allows for tailored filtering based on plasmon resonance. Until now EOT devices have not fully achieved the need for variable attenuation capabilities. Sandia has developed an EOT device with a...

Tuneable photonic device including an array of metamaterial resonators

Patent • #9,594,266. A photonic apparatus includes a metamaterial resonator array overlying and electromagnetically coupled to a vertically stacked plurality of quantum wells defined in a semiconductor body. An arrangement of electrical contact layers is provided for facilitating the application of a bias voltage across the quantum well stack. Those portions of...

Tuning and synthesis of metallic nanostructures by mechanical compression

Patent • #9,180,420. The present invention provides a pressure-induced phase transformation process to engineer metal nanoparticle architectures and to fabricate new nanostructured materials. The reversible changes of the nanoparticle unit cell dimension under pressure allow precise control over interparticle separation in 2D or 3D nanoparticle assemblies, offering unique robustness for interrogation of...

Tuning and synthesis of semiconductor nanostructures by mechanical compression

Patent • #9,187,646. A mechanical compression method can be used to tune semiconductor nanoparticle lattice structure and synthesize new semiconductor nanostructures including nanorods, nanowires, nanosheets, and other three-dimensional interconnected structures. II-VI or IV-VI compound semiconductor nanoparticle assemblies can be used as starting materials, including CdSe, CdTe, ZnSe, ZnS, PbSe, and PbS.

Tuning method for microresonators and microresonators made thereby

Patent • #9,203,134. A micromechanical resonator is disclosed. The resonator includes a resonant micromechanical element. A film of annealable material can be deposited on a facial surface of the element. The resonance of the element can be tuned by annealing the deposited film. Also disclosed are methods of applying a film on...

Turbo-alternator-compressor design for supercritical high density working fluids

Patent • #8,397,506. Techniques for generating power are provided. Such techniques involve a thermodynamic system including a housing, a turbine positioned in a turbine cavity of the housing, a compressor positioned in a compressor cavity of the housing, and an alternator positioned in a rotor cavity between the turbine and compressor cavities....

Twistact

Featured Opportunity • A fundamentally new type of rotary electrical contact that addresses short operating lifetime due to sliding-contact wear and electrical arcing associated with contact bounce Researchers at Sandia National Laboratories developed a fundamentally new type of rotary electrical contact that addresses the two limitations of conventional brush/slip ring technology: (1) short...

Two antenna, two pass interferometric synthetic aperture radar

Patent • #6,911,932. A multi-antenna, multi-pass IFSAR mode utilizing data driven alignment of multiple independent passes can combine the scaling accuracy of a two-antenna, one-pass IFSAR mode with the height-noise performance of a one-antenna, two-pass IFSAR mode. A two-antenna, two-pass IFSAR mode can accurately estimate the larger antenna baseline from the data...

Two-color infrared detector

Patent • #8,723,161. A two-color detector includes a first absorber layer. The first absorber layer exhibits a first valence band energy characterized by a first valence band energy function. A barrier layer adjoins the first absorber layer at a first interface. The barrier layer exhibits a second valence band energy characterized by...

Two-dimensional APDs and SPADs and related methods

Patent • #9,391,225. Avalanche photodiodes (APDs) and single photon avalanche detectors (SPADs) are provided with a lateral multiplication region that provides improved amplification through increased impact ionization.

Two-fluid hydrodynamic printing

Patent • #10,130,961. Hydrodynamic focusing of two fluid steams provides a novel micro printing technology for printed electronics and other high performance applications.

Two-Sensor System for Absolute Age and Temperature History

Featured Opportunity • Summary Numerous commercial and military applications require knowing the absolute age and/or temperature history of a device or system starting from the time it is assembled or commissioned. Ideally this information could be obtained simply and without power. The Sandia-developed age and temperature history sensor is a physical materials system...

Two-terminal electronic charge resistance switching device

Patent • #10,950,790. A two-terminal memory device and methods for its use are provided. In the device, a bottom electrode is electrically continuous with a first operating terminal, and a control gate electrode is electrically continuous with a second operating terminal. A stack of insulator layers comprising a hopping conduction layer and...

Two-terminator RF adapter for background/environment noise measurement

Patent • #12078656. A two-terminator RF adapter for background noise measurement in a test environment comprises a system test port comprising a system test port termination and a system test port connector to connect to a system under test; and a data acquisition port, comprising a data acquisition port termination and a...

Ultra-Fast Digital X-Ray Imager

Featured Opportunity • High Energy Density (HED) physics and inertial confinement fusion experiments rely on successively monitored images for data collection High Energy Density (HED) physics and inertial confinement fusion experiments rely on successively monitored images for data collection. Currently, gated X-ray imaging and spectroscopy in the 0.1-10 nanosecond (ns) time scale in...

Ultra-high reliability wireless communication systems and methods

Patent • #10,952,123. Systems and methods for ultra-high reliability (UHR) wireless communications systems and methods are disclosed. The disclosed UHR wireless communications systems and methods make the networked components on a communications infrastructure robust to interference caused by unintentional jamming, intermittent connectivity, weather, and physical barriers.

Ultra-high strength multphase high-entropy alloys

Patent • #12180567. Refractory-reinforced multiphase high entropy alloys (RHEAs) advantageously providing high strength and fracture toughness in an as-AM deposited condition and other conditions are described.
Results 2326–2350 of 2,458