title: Viscoplastic and granular behavior in films of colloidal nanocrystals.
abstract: Nanoindentation measurements of electrophoretically deposited films of colloidal CdSe nanocrystals, capped by organic ligands, show the films have an elastic stiffness modulus of approximately 10 GPa and exhibit viscoplasticity. This mechanical response suggests polymeric features that are attributable to the ligands. After particle cross-linking and partial ligand removal, the films exhibit more features of granularity.
authors.affiliation: Department of Mechanical Engineering, Columbia University, New York, New York 10027, USA.
authors.forename: Dongyun
authors.initials: D
authors.lastname: Lee
authors.forename: Shengguo
authors.initials: S
authors.lastname: Jia
authors.forename: Sarbajit
authors.initials: S
authors.lastname: Banerjee
authors.forename: Joze
authors.initials: J
authors.lastname: Bevk
authors.forename: Irving P
authors.initials: IP
authors.lastname: Herman
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Kysar