Justin Mallek

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Selective thermal emission in a useful range of energies from a material operating at high temperatures is required for effective solar thermophotovoltaic energy conversion. Three-dimensional metallic photonic crystals can exhibit spectral emissivity that is modified compared with the emissivity of unstructured metals, resulting in an emission spectrum(More)
The performance of carbon nanotube network (CNN) devices is usually limited by the high resistance of individual nanotube junctions (NJs). We present a novel method to reduce this resistance through a nanoscale chemical vapor deposition (CVD) process. By passing current through the devices in the presence of a gaseous CVD precursor, localized nanoscale(More)
Direct visualization of the dynamics of structural glasses and amorphous solids on the sub-nanometer scale provides rich information unavailable from bulk or conventional single molecule techniques. We study the surface of hafnium diboride, a conductive ultrahigh temperature ceramic material that can be grown in amorphous films. Our scanning tunneling(More)
transconductance amplifier, Regulated telescopic OTA. Abstract—A fully-differential Regulated Telescopic Operational Transconductance Amplifier (OTA) is proposed. In fact, the conventional OTA is a version of simple telescopic circuit with the gate voltage of the cascode transistor is controlled by a feedback amplifier. To obtain more DC gain, the feedback(More)
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