Quantum Size Effects on the Chemical Sensing Performance of Two-Dimensional Semiconductors

@inproceedings{Nah2012QuantumSE,
  title={Quantum Size Effects on the Chemical Sensing Performance of Two-Dimensional Semiconductors},
  author={Junghyo Nah and S. Bala Kumar and Hui Fang and Yu-Ze Chen and Elena Plis and Yu-Lun Chueh and Sanjay Krishna and Jing Guo and Ali Javey},
  year={2012}
}
We investigate the role of quantum confinement on the performance of gas sensors based on twodimensional InAs membranes. Pd-decorated InAs membranes configured as H2 sensors are shown to exhibit strong thickness dependence, with ∼100× enhancement in the sensor response as the thickness is reduced from 48 to 8 nm. Through detailed experiments and modeling, the thickness scaling trend is attributed to the quantization of electrons which favorably alters both the position and the transport… CONTINUE READING
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