title: Geometric stability and elastic response of a supported nanoparticle film.
abstract: The mechanical response to compression of a self-assembled gold nanoparticle monolayer and trilayer at the air-liquid interface is examined. Analysis of the film's buckling morphology under compression reveals an anomalously low bending rigidity for both the monolayer and the trilayer, in contrast with continuum elastic plates. We attribute this to the spherical geometry of the nanoparticles and poor coupling between layers, respectively. The elastic energy of the trilayers is first delocalized in wrinkles and then localized into folds, as predicted by linear and nonlinear elastic theory for an inextensible thin film supported on a fluid.
authors.affiliation: Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, USA.
authors.forename: Brian D
authors.initials: BD
authors.lastname: Leahy
authors.forename: Luka
authors.initials: L
authors.lastname: Pocivavsek
authors.forename: Mati
authors.initials: M
authors.lastname: Meron
authors.forename: Kin Lok
authors.initials: KL
authors.lastname: Lam
authors.forename: Desiree
authors.initials: D
authors.lastname: Salas
authors.forename: P James
authors.initials: PJ
authors.lastname: Viccaro
authors.forename: Ka Yee C
authors.initials: KY
authors.lastname: Lee
authors.forename: Binhua
authors.initials: B
authors.lastname: Lin
mesh_terms: D000388:Air; D019245:Compressive Strength; D004548:Elasticity; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D018625:Microscopy, Atomic Force; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D006046:Gold