title: New perspectives for direct PDMS microfabrication using a CD-DVD laser.
abstract: A simple and inexpensive alternative to high-power lasers for the direct fabrication of microchannels and rapid prototyping of poly-dimethylsiloxane (PDMS) is presented. By focusing the infrared laser beam of a commercial, low-power CD-DVD unit on absorbing carbon micro-cluster additives, highly localized PDMS combustion can be used to etch the polymer, which is otherwise transparent at such wavelengths. Thanks to a precise and automated control of laser conditions, laser-induced incandescence is originated at the material surface and produces high-resolution micropatterns that present properties normally induced with lasers of much greater energies in PDMS: formation of in situ nanodomains, local fluorescence and waveguide patterns. An extensive study of the phenomenon and its performance for PDMS microfabrication are presented.
authors.affiliation: Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Circuito Exterior S/N, Ciudad Universitaria, Delegación Coyoacán, C.P. 04510, D. F. México, México. mathieu_h@ciencias.unam.mx.
authors.forename: M
authors.initials: M
authors.lastname: Hautefeuille
authors.forename: L
authors.initials: L
authors.lastname: Cabriales
authors.forename: R
authors.initials: R
authors.lastname: Pimentel-Domínguez
authors.forename: V
authors.initials: V
authors.lastname: Velázquez
authors.forename: J
authors.initials: J
authors.lastname: Hernández-Cordero
authors.forename: L
authors.initials: L
authors.lastname: Oropeza-Ramos
authors.forename: M
authors.initials: M
authors.lastname: Rivera
authors.forename: M P
authors.initials: MP
authors.lastname: Carreón-Castro
authors.forename: M
authors.initials: M
authors.lastname: Grether
authors.forename: E
authors.initials: E
authors.lastname: López-Moreno
mesh_terms: D055598:Chemical Phenomena; D016250:Compact Disks; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D007834:Lasers; D055616:Microtechnology / Q000295:instrumentation*
chemical_list: D004129:Dimethylpolysiloxanes; C013830:baysilon