کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1505679 | 993769 | 2009 | 5 صفحه PDF | دانلود رایگان |
Electrical transport experiments are performed on individual α-MnO2 and β-MnO2 nanorods. Both of α-MnO2 and β-MnO2 nanorods are synthesized via hydrothermal routes. A three-region method is used to analyze their nonlinear current–voltage characteristics. Under low biases, the effective contact barrier height is roughly estimated to be 0.05 eV for α-MnO2 and 0.15 eV for β-MnO2, respectively. As the applied bias is high enough, the contact barriers are significantly tilted and the current is largely tunneling. The conductance of α-MnO2 and β-MnO2 nanorods at room temperature is roughly estimated to be 5.98 and 1.74 × 10−3 cm−1 Ω−1, respectively. And the thermal-activation energy is roughly estimated to be 0.047 and 0.226 eV, respectively. Our results are probably the bases for their applications in nanosized electrical devices.
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Journal: Solid State Sciences - Volume 11, Issue 12, December 2009, Pages 2106–2110