title: Solution-assisted assembly of organic semiconducting single crystals on surfaces with patterned wettability.
abstract: Two efficient approaches to assembling organic semiconducting single crystals are described. The methods rely on solvent wetting and dewetting on substrates with patterned wettability to selectively direct the deposition or removal of organic crystals. Substrates were functionalized with different self-assembled monolayers (SAMs) to achieve the desired wettabilities. The assembly of different organic crystals over centimeter-squared areas on Au, SiO2, and flexible plastic substrates was demonstrated. By designing line features on the substrate, the alignment of crystals, such as CuPc needles, was also achieved. As a demonstration of the potential application of this assembly approach, arrays of single-crystal organic field-effect transistors were fabricated by patterning organic single crystals directly onto and between transistor source and drain electrodes.
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA.
authors.forename: Shuhong
authors.initials: S
authors.lastname: Liu
authors.forename: Wechung Maria
authors.initials: WM
authors.lastname: Wang
authors.forename: Stefan C B
authors.initials: SC
authors.lastname: Mannsfeld
authors.forename: Jason
authors.initials: J
authors.lastname: Locklin
authors.forename: Peter
authors.initials: P
authors.lastname: Erk
authors.forename: Marcos
authors.initials: M
authors.lastname: Gomez
authors.forename: Frauke
authors.initials: F
authors.lastname: Richter
authors.forename: Zhenan
authors.initials: Z
authors.lastname: Bao