T.E. Mcknight

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Exposing a column of ferrofluid to coincident magnetic and thermal fields produces a pressure gradient in the magnetic fluid. As the column of ferrofluid heats up, it loses its attraction to the magnetic field and is displaced by cooler fluid. Subsequently, it is possible to generate a ferrofluid pump with no moving mechanical parts. Until recently,(More)
A bright neutron source such as the spallation neutron source (SNS) places extreme requirements on detectors including excellent 2-D spatial imaging and high dynamic range. Present imaging detectors have either shown position resolutions that are less than acceptable or they exhibit excessive paralyzing dead times due to the brightness of the source. A(More)
We present a discussion of the use of vertically- aligned carbon nanofibers (VACNFs) as nanoscale elements that directly interface to biological whole-cell systems. VACNFs are compatible with a large subset of microfabrication processes, thereby enabling their incorporation into mesoscale hybrid systems that provide addressability of the VACNFs as either(More)
In this letter, we have successfully integrated vertically aligned carbon nanofibers (VACNFs) onto active matrix thin-film transistor (TFT) and demonstrate a new microelectrode array (MEA) platform. The materials and processes of the bottom gate inverted staggered TFT structure were designed to be compatible with the requisite high-temperature(More)
Vertically aligned carbon nanofibers with tethered plasmids have been developed as a novel tool for the direct physical introduction of nucleic acids (tethered genes) into living cells. Immobilization of DNA to a scaffold, or "tethering", can influence the accessibility and transcriptional activity of the DNA template. Therefore, it is necessary to(More)
A reagentless amperometric enzymatic biosensor is constructed using Vertically Aligned Carbon Nanofiber (VACNF) for the detection of alcohol. Yeast alcohol dehydrogenase (YADH), and its cofactor nicotinamide adenine dinuleotide (NAD<sup>+</sup>) are immobilized by covalent attachment and adsorption to the carbon substrate. Electrochemical techniques are(More)
This paper describes the integration of vertically aligned carbon nanofibers (VACNF) with the CMOS integrated circuits fabricated with commercial CMOS processes. The growth temperature of VACNF is about 700degC (Merkulov et al., 2001) which is well above the maximum operating temperature of CMOS circuits. In order to integrate VACNF with CMOS circuits, a(More)
Biological cells represent an engineering ideal. They are the fundamental unit of all biological systems, perform virtually any function, and operate with efficiencies unmatched by man-made creations. These capabilities result from the optimized arrangement of chemical and physical features across nanometer and micron lengths. Emerging capabilities to(More)
A magnetocaloric pump provides a simple means of pumping fluid using only external thermal and magnetic fields. The principle, which can be traced back to the early work of Rosensweig, is straightforward. Magnetic materials tend to lose their magnetization as the temperature approaches the material's Curie point. Exposing a column of magnetic fluid to a(More)
We have designed, built, and tested a 2-D pixellated thermal neutron detector. The detector is modeled after the MicroMegas-type structure previously published for collider-type experiments. The detector consists of a 4/spl times/4 square array of 1 cm/sup 2/ pixels each of which is connected to an individual preamplifier-shaper-data acquisition system. The(More)
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