1/f noise in gold nanoparticle chemosensors

Kurdak, C.; Kim, J.; Kuo, A.; Lucido, J. J.; Farina, L. A.; Bai, X.; Rowe, M. P.; Matzger, A. J.
February 2005
Applied Physics Letters;2/14/2005, Vol. 86 Issue 7, p073506
Academic Journal
We present a systematic study of low-frequency noise in Au nanoparticle chemosensors. All the sensors we have studied exhibit 1/f-type noise at low frequencies. The magnitude of the 1/f noise was smaller in devices with a larger device area, indicating that the 1/f noise is caused by intrinsic processes. The noise amplitude was found to be strongly temperature dependent between 40–300 K, with a local peak at around 100 K, and weakly dependent below 40 K. The noise data could not be fit by a single activated process indicating that multiple noise processes must be present in our sensors.


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