title: Suitability of hyperbranched polyester for sensoric applications--investigation with reflectometric interference spectroscopy.
abstract: Hyperbranched polyesters (HBP) with different end groups (P-OH, P-COOH, P-OAc) were prepared as thin films. Their surface properties were investigated using zeta potential and contact angle measurements. The differences in surface properties between P-OH and P-COOH, on the one hand, and P-OAc, on the other hand, predicted different behavior in sensoric applications. Therefore, the vapor of the homologous series of alcohols from methanol to pentanol was exposed to the thin films. Changes in thickness were observed with reflectometric interference spectroscopy (RIfS). First investigations in a current analytical problem for the detection and discrimination of refrigerants (freons) using P-OH as sensitive layer have been shown. Polydimethylsiloxane (PDMS) and poly(ether urethane) (PUT) were used as reference sensor materials for the RIfS measurements.
authors.affiliation: Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany.
authors.forename: Georg
authors.initials: G
authors.lastname: Belge
authors.forename: Detlev
authors.initials: D
authors.lastname: Beyerlein
authors.forename: Carmen
authors.initials: C
authors.lastname: Betsch
authors.forename: Klaus-J
authors.initials: KJ
authors.lastname: Eichhorn
authors.forename: Günter
authors.initials: G
authors.lastname: Gauglitz
authors.forename: Karina
authors.initials: K
authors.lastname: Grundke
authors.forename: Brigitte
authors.initials: B
authors.lastname: Voit