title: Platinum electrode noise in the ENG spectrum.
abstract: The noise from Pt electrodes has not been measured before. We measured the impedance and noise between pairs of Pt electrodes in cylindrical cells within frequency bands which contain the electroneurogram band (ENG, 500-10 kHz). The results show that the noise from the Pt-saline interface and also the volume conductor are the same as the thermal noise from the real part of those impedances. This means that Pt electrodes are convenient for neural recording because the total source noise from the electrodes and the volume conductor (tissue) can be estimated from the measured total impedance and calculating the thermal noise associated with the resistive part. This differs from Ag/AgCl electrodes for which the interface noise has been reported to be higher than the thermal noise, and therefore calculation of the total noise will be more difficult.
authors.affiliation: Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, UK. x.liu@ee.ucl.ac.uk
authors.forename: Xiao
authors.initials: X
authors.lastname: Liu
authors.forename: Andreas
authors.initials: A
authors.lastname: Demosthenous
authors.forename: Nick
authors.initials: N
authors.lastname: Donaldson
mesh_terms: D000669:Amplifiers, Electronic; D017097:Electric Impedance; D004560:Electricity; D004567:Electrodes, Implanted; D004582:Electronics, Medical / Q000295:instrumentation; D004594:Electrophysiology / Q000295:instrumentation*; D006801:Humans; D008959:Models, Neurological; D009474:Neurons / Q000502:physiology*; D010984:Platinum
chemical_list: D010984:Platinum
references.citation: IEEE Trans Biomed Eng. 1977 Jan;24(1):59-63
references.pmid: 851475
references.citation: J Neurosci Methods. 2002 Mar 15;114(2):135-48
references.pmid: 11856564
references.citation: Neuromodulation. 2002 Jan;5(1):41-53
references.pmid: 22151781
references.citation: Science. 1934 Feb 16;79(2042):164-5
references.pmid: 17788146
references.citation: Med Biol Eng Comput. 2002 May;40(3):332-8
references.pmid: 12195981
references.citation: Med Res Eng. 1967;6(3):33-4
references.pmid: 6059988
references.citation: Med Biol Eng. 1974 Sep;12(5):606-12
references.pmid: 4465583
references.citation: J Urol. 2005 Oct;174(4 Pt 1):1482-7
references.pmid: 16145476
references.citation: Med Biol Eng Comput. 1996 Nov;34(6):460-6
references.pmid: 9039749
references.citation: Annu Int Conf IEEE Eng Med Biol Soc. 2007;2007:434-6
references.pmid: 18001982
references.citation: Conf Proc IEEE Eng Med Biol Soc. 2004;2004:2360-3
references.pmid: 17270744
references.citation: Biomed Instrum Technol. 2000 Mar-Apr;34(2):125-30
references.pmid: 10820641