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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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Micro-LED arrays: a tool for two-dimensional neuron stimulation

Poher, V. and Grossman, N. and Kennedy, G.T. and Nikolic, K. and Zhang, H.X. and Gong, Z. and Drakakis, E.M. and Gu, E. and Dawson, M.D. and French, P.M.W. and Degenaar, P. and Neil, M.A.A. (2008) Micro-LED arrays: a tool for two-dimensional neuron stimulation. Journal of Physics D: Applied Physics, 41 (9). 094014. ISSN 0022-3727

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Abstract

Stimulating neuron cells with light is an exciting new technology that is revolutionizing the neurosciences. To date, due to the optical complexity that is involved, photostimulation has only been achieved at a single site using high power light sources. Here we present a GaN based micro-light emitting diode (LED) array that can open the way to multi-site photostimulation of neuron cells. The device is a two-dimensional array of micrometre size LED emitters. Each emitter has the required wavelength, optical power and modulation bandwidth to trigger almost any photosensitizer and is individually addressable. We demonstrate micrometre resolution photoactivation of a caged fluorophore and photostimulation of sensitized living neuron cells. In addition, a complete system that combines the micro-LED array with multi-site electrophysiological recording based on microelectrode array technology and/or fluorescence imaging is presented.