Further, with a further increase in hydrogen concentration, the response value of this sensor continued to show an increasing trend.
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An Ultrasensitive Room-Temperature H<sub>2</sub> Sensor Based on a TiO<sub>2</sub> Rutile-Anatase Homojunction.
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The sentences
Therefore, the potential barrier of the TiO 2 (R/A-X) sample in air showed a trend of first increasing and then decreasing with increasing anatase TiO 2 content.