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    • Jim McMahon

    CEO, ZebraCom

    Jim McMahon is CEO of ZebraCom (Simi Valley, CA), a public relations firm for industrial and high-tech companies.

    (Courtesy of the Busani Research Group)
    FIGURE 1. The Busani Research Group’s AFM probe for semiconductor patterning, equipped with an aluminum nitrate laser nanowire used as a lithographic tip, allows traditional laser scanning to be performed along with spectroscopy to record the fluorescence signal of the material.
    Detectors & Imaging

    Combining laser scanning and spectroscopy for enhanced nanolithography patterning

    Jim McMahon
    April 25, 2023
    An AFM probe for semiconductor patterning, equipped with an aluminum nitrate laser nanowire used as a lithographic tip, allows traditional laser scanning to be performed along...
    Microscopy

    NANOPOSITIONING: Piezo motors and actuators drive bio-optics precision

    Jim McMahon
    July 1, 2010
    Precision and accuracy are at the heart of biomedical instrumentation, including imaging and treatment tools—and the motors these instruments incorporate have much to do with ...
    FIGURE 1. Tangential slices of rat occipital cortex, stained with NK3630 dye, change color (absorption) as the transmembrane potential of the neurons varies. Imaging was performed by a 464-element photodiode array at a rate of 1600 frames /s. The oscillations (4–12 Hz) were induced by perfusing slices with 100 mM carbachol and 10 mM bicuculline. The optical signal on each optical detector is a summation of depolarization/hyperpolarization of about 1000 neurons. The optical signal of the oscillations was about 0.01% of the resting light intensity. The signal on each detector is normalized to its own max-min and assigned to a color according to a linear color scale. The oscillations were organized spatially as propagating waves. Wave patterns shown in the movies were formed spontaneously.
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    NEUROLOGY/BRAIN IMAGING: A new tool for brain discovery

    Jim McMahon
    Nov. 1, 2009
    The ability to measure micron-level neuronal activity patterns in the mammalian neocortex is enabling insight into brain sensory and motor processing functions related to cardiac...