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. 2010 Apr 22;10(4):4083–4099. doi: 10.3390/s100404083

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© 2010 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 6. — (a) Comparison of the response of a SnO₂ nanowire, operated at T = 175 °C in dark conditions and at room temperature (T = 25 °C) under UV illumination (E_ph = 3.67 ± 0.05 eV, Φ_ph = 30 × 10²² ph/m²s) to a pulse of 5 ppm [30]. (b) Comparison of the sensor response when operated with conventional heating (T = 175 °C) and UV illumination. The selection of the appropriate photon flux leads to sensor performances comparable to those of conventional heated sensors (Reprinted from reference [31] with permission from American Institute of Physics).