title: Field-effect transistors based on self-organized molecular nanostripes.
abstract: Charge transport properties in organic semiconductors depend strongly on molecular order. Here we demonstrate field-effect transistors where drain current flows through a precisely defined array of nanostripes made of crystalline and highly ordered molecules. The molecular stripes are fabricated across the channel of the transistor by a stamp-assisted deposition of the molecular semiconductors from a solution. As the solvent evaporates, the capillary forces drive the solution to form menisci under the stamp protrusions. The solute precipitates only in the regions where the solution is confined by the menisci once the critical concentration is reached and self-organizes into molecularly ordered stripes 100-200 nm wide and a few monolayers high. The charge mobility measured along the stripes is 2 orders of magnitude larger than the values measured for spin-coated thin films.
authors.affiliation: CNR, Institute for the Study of Nanostructured Materials, Nanotechnology of Multifunctional Materials Research Division, Via P. Gobetti 101, I-40129 Bologna, Italy.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Cavallini
authors.forename: Pablo
authors.initials: P
authors.lastname: Stoliar
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Moulin
authors.forename: Mathieu
authors.initials: M
authors.lastname: Surin
authors.forename: Philippe
authors.initials: P
authors.lastname: Leclère
authors.forename: Roberto
authors.initials: R
authors.lastname: Lazzaroni
authors.forename: Dag Werner
authors.initials: DW
authors.lastname: Breiby
authors.forename: Jens Wenzel
authors.initials: JW
authors.lastname: Andreasen
authors.forename: Martin M
authors.initials: MM
authors.lastname: Nielsen
authors.forename: Prashant
authors.initials: P
authors.lastname: Sonar
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Grimsdale
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
authors.forename: Fabio
authors.initials: F
authors.lastname: Biscarini
mesh_terms: D003460:Crystallization / Q000379:methods*; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005461:Fluorine / Q000737:chemistry*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D013876:Thiophenes / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D013876:Thiophenes; C019101:alpha-terthienyl; D005461:Fluorine