title: Detecting single porphyrin molecules in a conically shaped synthetic nanopore.
abstract: We report here the first example of abiotic resistive-pulse sensing of a molecular (as opposed to a particle or macromolecular) analyte. This was accomplished by using a conically shaped nanopore prepared by the track-etch method as the sensing element. It is possible to sense the molecular analyte because the small diameter opening of the conical nanopore (approximately 4.5 nm) is comparable to the diameter of the analyte molecule (approximately 2 nm).
authors.affiliation: Department of Chemistry and Center for Research at the Bio/Nano Interface, University of Florida, Gainesville, Florida 32611-7200, USA.
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Heins
authors.forename: Zuzanna S
authors.initials: ZS
authors.lastname: Siwy
authors.forename: Lane A
authors.initials: LA
authors.lastname: Baker
authors.forename: Charles R
authors.initials: CR
authors.lastname: Martin