title: Parallel sub-micrometre channels with different dimensions for laser scattering detection.
abstract: A novel and simple approach for the realization of polymer sub-micrometre channels is introduced by exploiting replica molding of Pt wires deposited by focused ion beam. We fabricate arrays of parallel channels with typical dimensions down to 600 nm and with variable height. We characterize the pressure-driven transport of polymer colloids through the channels in terms of the translocation frequency, amplitude and duration by implementing a laser scattering detection technique. We propose a prototype application of the presented platform such as the in situ sizing and sensing of populations of particles with different dimensions down to 50 nm.
authors.affiliation: University of Cambridge, Cavendish Laboratory, Cambridge, CB3 0HE, United Kingdom.
authors.forename: Stefano
authors.initials: S
authors.lastname: Pagliara
authors.forename: Catalin
authors.initials: C
authors.lastname: Chimerel
authors.forename: Richard
authors.initials: R
authors.lastname: Langford
authors.forename: Dirk G A L
authors.initials: DG
authors.lastname: Aarts
authors.forename: Ulrich F
authors.initials: UF
authors.lastname: Keyser