Geometric stability and elastic response of a supported nanoparticle film.
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.
Leahy
Brian D
BD
Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, USA.
Pocivavsek
Luka
L
Meron
Mati
M
Lam
Kin Lok
KL
Salas
Desiree
D
Viccaro
P James
PJ
Lee
Ka Yee C
KY
Lin
Binhua
B
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
D006046:Gold