1/f noise in gold nanoparticle chemosensors -: art. no. 073506

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 I If noise was smaller in devices with a larger device area, indicating that the l If 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. (C) 2005 American Institute of Physics.