title: Electrochemically synthesized amorphous and crystalline nanowires: dissimilar nanomechanical behavior in comparison with homologous flat films.
abstract: The effects of constrained sample dimensions on the mechanical behavior of crystalline materials have been extensively investigated. However, there is no clear understanding of these effects in nano-sized amorphous samples. Herein, nanoindentation together with finite element simulations are used to compare the properties of crystalline and glassy CoNi(Re)P electrodeposited nanowires (ϕ ≈ 100 nm) with films (3 μm thick) of analogous composition and structure. The results reveal that amorphous nanowires exhibit a larger hardness, lower Young's modulus and higher plasticity index than glassy films. Conversely, the very large hardness and higher Young's modulus of crystalline nanowires are accompanied by a decrease in plasticity with respect to the homologous crystalline films. Remarkably, proper interpretation of the mechanical properties of the nanowires requires taking the curved geometry of the indented surface and sink-in effects into account. These findings are of high relevance for optimizing the performance of new, mechanically-robust, nanoscale materials for increasingly complex miniaturized devices.
authors.affiliation: Institute of Robotics and Intelligent Systems (IRIS), ETH Zürich, CH-8092 Zürich, Switzerland. vidalp@ethz.ch.
authors.forename: M A
authors.initials: MA
authors.lastname: Zeeshan
authors.affiliation: Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain. eva.pellicer@uab.cat.
authors.forename: D
authors.initials: D
authors.lastname: Esqué-de Los Ojos
authors.affiliation: Servei de Microscòpia, Facultat de Ciències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Castro-Hartmann
authors.affiliation: Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain. eva.pellicer@uab.cat.
authors.forename: M
authors.initials: M
authors.lastname: Guerrero
authors.affiliation: Institució Catalana de Recerca i Estudis Avançats (ICREA) and ICN2 - Institut Catala de Nanociencia i Nanotecnologia, Campus UAB, 08193 Bellaterra (Barcelona), Spain.
authors.forename: J
authors.initials: J
authors.lastname: Nogués
authors.affiliation: Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain. eva.pellicer@uab.cat.
authors.forename: S
authors.initials: S
authors.lastname: Suriñach
authors.affiliation: Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain. eva.pellicer@uab.cat.
authors.forename: M D
authors.initials: MD
authors.lastname: Baró
authors.affiliation: Institute of Robotics and Intelligent Systems (IRIS), ETH Zürich, CH-8092 Zürich, Switzerland. vidalp@ethz.ch.
authors.forename: B J
authors.initials: BJ
authors.lastname: Nelson
authors.affiliation: Institute of Robotics and Intelligent Systems (IRIS), ETH Zürich, CH-8092 Zürich, Switzerland. vidalp@ethz.ch.
authors.forename: S
authors.initials: S
authors.lastname: Pané
authors.affiliation: Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain. eva.pellicer@uab.cat.
authors.forename: E
authors.initials: E
authors.lastname: Pellicer
authors.affiliation: Institució Catalana de Recerca i Estudis Avançats (ICREA) and Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain. jordi.sort@uab.cat.
authors.forename: J
authors.initials: J
authors.lastname: Sort