title: Inkjet-printed multicolor arrays of highly luminescent nanocrystal-based nanocomposites.
abstract: Inkjet technology is a compelling method for the flexible and cost-effective printing of functional inks. We show that nanocomposite solutions based on polystyrene and differently sized core/shell-type nanocrystals (NCs) formed by a CdSe core coated with a shell of ZnS (CdSe@ZnS) in a single solvent, chloroform, can be reliably dispensed into luminescent, multicolor pixel arrays. This study demonstrates the relevance of parameters like polymer concentration and nozzle diameter, highlighting how the optimal conditions to print NCs embedded in 5 wt% polystyrene nanocomposite are given by a 70-microm-diameter nozzle. The obtained structures show that the bright size-dependent emission of the NCs in the nanocomposite is retained in the printed pixels.
authors.affiliation: Microsystems Laboratory, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
authors.forename: Joo Yeon
authors.initials: JY
authors.lastname: Kim
authors.forename: Chiara
authors.initials: C
authors.lastname: Ingrosso
authors.forename: Vahid
authors.initials: V
authors.lastname: Fakhfouri
authors.forename: Marinella
authors.initials: M
authors.lastname: Striccoli
authors.forename: Angela
authors.initials: A
authors.lastname: Agostiano
authors.forename: M Lucia
authors.initials: ML
authors.lastname: Curri
authors.forename: Jurgen
authors.initials: J
authors.lastname: Brugger
mesh_terms: D003116:Color; D016287:Computer Peripherals; D003460:Crystallization / Q000379:methods; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D046228:Microarray Analysis / Q000295:instrumentation / Q000379:methods*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D011327:Printing / Q000379:methods*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances