title: Direct laser patterning of soft matter: photothermal processing of supported phospholipid multilayers with nanoscale precision.
abstract: Direct laser patterning of supported phospholipid multilayers is investigated. Spin coating is used to fabricate stacked bilayers of 1,2-dioleoyl-sn-glycero-3-phosphate (DOPA). Photothermal processing with a focused laser beam at lambda = 514 nm allows removal of the coating at predefined positions without causing any significant change in adjacent areas. Moreover, processing with nanoscale precision is feasible despite the soft and fluid nature of phospholipid films. In particular, holes with diameters from 1.8 microm down to 300 nm and below are fabricated by using a 1/e(2) laser spot size of about 2.5 microm. In addition, patterning is also very flexible and can be carried out over macroscopic length scales and at short processing times. Considering these features photothermal laser processing constitutes a powerful tool for micro- and nanopatterning of phospholipid films.
authors.affiliation: Fachbereich Chemie Physikalische Chemie and CeNIDE-Center for Nanointegration Duisburg-Essen, Universität Duisburg-Essen, Essen, Germany.
authors.forename: Mareike
authors.initials: M
authors.lastname: Mathieu
authors.forename: Daniel
authors.initials: D
authors.lastname: Schunk
authors.forename: Steffen
authors.initials: S
authors.lastname: Franzka
authors.forename: Christian
authors.initials: C
authors.lastname: Mayer
authors.forename: Eckart
authors.initials: E
authors.lastname: Hasselbrink
authors.forename: Nils
authors.initials: N
authors.lastname: Hartmann
mesh_terms: D007834:Lasers; D036103:Nanotechnology; D010743:Phospholipids / Q000737:chemistry*
chemical_list: D010743:Phospholipids