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31 May 2004

Volume 84, Issue 22, pp. 4361-4576

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Appl. Phys. Lett. 84, 4409 (2004); http://dx.doi.org/10.1063/1.1757648 (3 pages)

Azita Soleymani, Piroz Zamankhan, and William Polashenski
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Neurons culturing and biophotonic sensing using porous silicon

S. Ben-Tabou de Leon, A. Sa’ar, R. Oren, M. E. Spira, and S. Yitzchaik

Appl. Phys. Lett. 84, 4361 (2004); http://dx.doi.org/10.1063/1.1741032 (3 pages) | Cited 15 times

Online Publication Date: 12 May 2004

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We report on culturing of Aplysia neurons on porous silicon substrates. Good adhesion of the neurons to the porous silicon substrate and a formation of neuron-semiconductor contact have been accomplished. Cultured neurons survived for at least one week on porous silicon showing normal passive membrane properties and generation of action potentials. We have investigated the possibility of using the photoluminescence from porous silicon for transducing neuronal activity into photonic signals. We found that photoluminescence quenching occurs for cathodic current polarization using aqueous salt-based liquid solution contact. The quenching process is due to diffusion of electrons into the porous silicon, giving rise to Auger nonradiative recombination in the silicon nanocrystallites. The decay time of the photoluminescence was found to be relatively slow due to diffusive nature of the process. © 2004 American Institute of Physics.
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87.16.D- Membranes, bilayers, and vesicles
87.85.J- Biomaterials
78.55.-m Photoluminescence, properties and materials
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