US – Page 125 – TechConnect Briefs

Decoupled Temperature and Moisture Sensor Made of CNT-Based Nanomaterials on Flexible Plastic Substrates

Diao L., Lamb J., Gibbons S., Shih W-S, Giedd R., Brewer Science, US

The moisture sensor is based on resistance change in the IDE structure. For the prototyped humidity sensors, a resistance change of more than 20% was observed while monitoring a moisture increase of 15% at room [...]

National Science Foundation’s Organic and Flexible Electronics Programs in the Engineering Directorate

Kaul A.B., National Science Foundation, US

Organic semiconductors display fascinating properties which has enabled their application in low-cost, high-efficiency organic photovoltaics (OPV), as well as in flexible and printed electronics for OLEDs for solid state lighting and displays. In particular, the [...]

Fluorescent Microspheres as Tags for Anti-Counterfeiting of Textiles

Ivanova O.S., Campbell T.A., Virginia Tech, US

The goal of this project is to create an anti-counterfeiting system for textiles that takes advantage of advanced materials and mobile readers. Current anti-counterfeiting systems are challenged in achieving the desired characteristics of lack of [...]

Plasmonic Enhanced Chiral Metamaterials

Alali F., Kim Y.H., Furlani E.P., University at Buffalo, US

Metamaterials are artificial materials that are engineered to produce various interesting phenomena such as negative refractivity and sub-diffraction-limit imaging. The majority of metamaterials for THz applications have been fabricated using “top-down” techniques. These methods tend [...]

Mid-infrared Silicon Microphotonic Cavities with High Resonance of Q~10^5

Lin P-T, Singh V., Cai Y., Patel N.S., Kimerling L., Agarwal A.M., Massachusetts Institute of Technology, US

One dimensional photonic crystal 1D-PhC silicon waveguide resonators with quality factor, Q~10^5, are demonstrated at mid-infrared wavelengths between 2 um to 5 um. Silicon has several advantages for mid-infrared applications including its broad mid-infrared transmission [...]

Mid-infrared Silicon Platform for Chip-scale Chemical Sensors

Lin H.-Y.G., Lin P-T, Lin H.-Y.G., Lin P-T, Singh V., Patel N.S., Hu J., Richardson K., Luzinov I., Hensley J., Kimerling L., Murthy Agarwal A., Massachusetts Institute of Technology, US

Mid-Infrared optofluidics based silicon sensor platforms are demonstrated. Silicon is a great candidate for mid-infrared optofluidics for the following reasons: (1) Silicon has a broad transmission window up to 7 um (2) Silicon offers CMOS [...]

Analysis of Pulsed-laser Plasmon-enhanced Photothermal Energy Transfer with Applications

Alali F., Karampelas I., Kim Y.H., Furlani E.P., University at Buffalo, US

The ability to control the generation and transport of thermal energy with precision at the nanoscale has drawn increased interest in recent years, especially for emerging applications in fields such as nanoparticle synthesis, imaging and [...]

Photoconductivity of Reduced Graphene Films

Loomis J., Panchapakesan B., University of Louisville, US

In this paper, we report large photocurrents in air-assisted depositions of reduced graphene films (derived from reduced single layer graphene oxide) upon illumination with near-infrared (NIR) light. NIR-induced charge carrier generation and subsequent separation at [...]

Mid-IR integrated nanophotonics for chip-scale quantum optics applications

Buchwald W., University of Massachusetts Boston, US

A mid-IR nanophotonic architecture based on inter-sub-band transitions, along with experimental verification of the use of surface depletion as a means to control the host materials absorption properties is presented. Finite element simulations suggest this [...]

Report on the Atomically Precise, No Interface, Device Regime Workshop

Randall J.N., Ballard J.B., Owen J.H.G., Manning S.D., Zyvex Labs, US

The paper will present the findings of a workshop held in June 2012 at NIST to explore a new device regime with no materials interfaces and atomically precise placement of dopant atoms. The participants concluded [...]