Surface and interface controlled yielding and plasticity in fivefold twinned Ag nanowires

Incoherent structural relaxation of fivefold twinned nanowires

Nucleation-controlled distributed plasticity in penta-twinned silver nanowires.

A unique size-dependent strain hardening mechanism, that achieves both high strength and ductility, is demonstrated for penta-twinned Ag nanowires (NWs) through a combined experimental-computational approach. Thin Ag NWs are found to deform via the surface nucleation of stacking fault decahedrons (SFDs) in multiple plastic zones distributed along the NW. Twin boundaries lead to the formation of...

Strain Hardening and Size Effect in Five-fold Twinned Ag Nanowires.

Metallic nanowires usually exhibit ultrahigh strength but low tensile ductility owing to their limited strain hardening capability. Here we study the unique strain hardening behavior of the five-fold twinned Ag nanowires by nanomechanical testing and atomistic modeling. In situ tensile tests within a scanning electron microscope revealed strong strain hardening behavior of the five-fold twinned...

Recoverable plasticity in penta-twinned metallic nanowires governed by dislocation nucleation and retraction

There has been relatively little study on time-dependent mechanical properties of nanowires, in spite of their importance for the design, fabrication and operation of nanoscale devices. Here we report a dislocation-mediated, time-dependent and fully reversible plastic behaviour in penta-twinned silver nanowires. In situ tensile experiments inside scanning and transmission electron microscopes s...

Surface Plasmon Resonance from Bimetallic Interface in Au–Ag Core–Shell Structure Nanowires

Transverse surface plasmon resonances (SPR) in Au-Ag and Ag-Au core-shell structure nanowires have been investigated by means of quasi-static theory. There are two kinds of SPR bands resulting from the outer surface of wall metal and the interface between core and wall metals, respectively. The SPR corresponding to the interface, which is similar to that of alloy particle, decreases and shifts ...