Origin of 1/f(alpha) noise in membrane channel currents

The transport characteristics of nanofabricated synthetic pores of similar dimensions to those of biological channels is reported. By comparison of the ion current through single synthetic and biological channels we show that the 1/f(alpha) noise indeed originates from the channel's opening-clo...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2002-10, Vol.89 (15), p.158101-158101
Main Authors: Siwy, Z, Fuliński, A
Format: Article
Language:English
Subjects:
Animals
Grasshoppers
Ion Channels - chemistry
Membranes, Artificial
Nanotechnology - methods
Potassium Channels - chemistry
Potassium Channels - physiology
Spectrum Analysis
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The transport characteristics of nanofabricated synthetic pores of similar dimensions to those of biological channels is reported. By comparison of the ion current through single synthetic and biological channels we show that the 1/f(alpha) noise indeed originates from the channel's opening-closing process. Strong evidence has been provided that the latter is related to the underlying motions of channel wall constituents.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.89.158101