<i>In situ</i>bending of an Au nanowire monitored by micro Laue diffraction

Leclère, C.; Cornelius, Thomas W.; Ren, Zhe; Davydok, Anton; Micha, Jean‐Sébastien; Robach, Odile; Richter, Gunther; Belliard, Laurent; Thomas, O.

doi:10.1107/s1600576715001107

Cited by 38 publications

(54 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10f. These variances in shape are in agreement with other BCD results [84] and electron microscopy observations [49,65,82].…”

Section: Role Of Nanowire Faceting and Coatings On Surface Diffusionsupporting

confidence: 93%

“…These experimentally observed shapes were primarily informed by interpreting 2D images, or alternatively, viewing the shape from the wire axis; however, the latter method requires destructive methods and may not provide the full surface crystallography. On the other hand, BCD allows for determining both the nanowire cross-section and crystalline orientation nondestructively and with a spatial resolution of ~10 nm [63,83,84]. For the following section, we review possible surface diffusion mechanisms that can occur on our experimentally determined geometry of the NW.…”

Section: Role Of Nanowire Faceting and Coatings On Surface Diffusionmentioning

confidence: 99%

See 1 more Smart Citation

Controlling dislocation nucleation-mediated plasticity in nanostructures via surface modification

et al. 2019

Self Cite

View full text Add to dashboard Cite

A straightforward strategy for reaching the ultimate strength of crystalline metals is to synthesize materials with a scarcity of defects. Bottom-up synthesis of nanostructures is an ideal means of approaching this limit, where nucleation of dislocations is a requirement in otherwise perfect crystals to facilitate plastic flow and mitigate brittle fracture. In this deformation mechanism regime where thermal fluctuations assist in the nucleation process, surface self-diffusion emerges as the rate-limiting step needed to promote displacive activity. We conducted tensile experiments in situ on pristine Au nanowires in addition to nanowires with thin Al 2 O 3 coatings produced by atomic layer deposition. Distributions of yield strengths of nanowires with fully conformal coatings show a pronounced reduction in scatter and a measurable shift toward higher values.The presence of coatings did not curtail the ability of the nanowires to sustain significant amounts of plastic strain. In all conditions, nucleation of partial dislocations governed incipient plasticity. Analyses of the data using a thermal activation model in tandem with Bragg coherent X-ray diffraction point to the potent effect of control over the near surface zone in mediating diffusion, and thereby dislocation nucleation and the ensuing plastic response of the nanostructures.

show abstract

“…10f. These variances in shape are in agreement with other BCD results [84] and electron microscopy observations [49,65,82].…”

Section: Role Of Nanowire Faceting and Coatings On Surface Diffusionsupporting

confidence: 93%

Section: Role Of Nanowire Faceting and Coatings On Surface Diffusionmentioning

confidence: 99%

Controlling dislocation nucleation-mediated plasticity in nanostructures via surface modification

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The mechanical behavior of the nanosized gold crystal was inferred from lattice strain measurements demonstrating the plastic character of the deformation. The obtained results are in good agreement both with previous works on similar nanowires and finite element calculations for quasi one-dimensional objects of the same size [24].…”

Section: Introductionsupporting

confidence: 91%

<em>In-Situ</em> Coherent X-Ray Diffraction during Three-Point Bending of a Au Nanowire: Visualization and Quantification

Davydok¹,

Cornelius²,

Ren³

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

The three-point bending behavior of a single Au nanowire deformed with an atomic force microscope was monitored by coherent X-ray diffraction using a sub-micrometer sized hard X-ray beam. While three-dimensional reciprocal-space maps were recorded before and after deformation by standard rocking curves, they were measured by scanning the energy of the incident X-ray beam during deformation at different loading stages. The mechanical behavior of the nanowire is visualized in reciprocal space and a complex deformation mechanism is described. In addition to the expected bending of the nanowire, torsion is detected. Bending and torsion angles are quantified from the high resolution diffraction data.

show abstract

“…However, especially in grazing-incidence XR experiments, the information is usually averaged over the area illuminated by the beam footprint, which is covering a surface larger than that accessible by means of AFM. Therefore, a combination of XR with the local—nanometer scale—and mechanical information by AFM became powerful over the last decade [98,99,100,101,102,103]. So far, in situ correlative XR-AFM can give insights of dynamic processes, such as phase transitions or chemical reactions, as well as use the AFM tip to apply an external force or employ it to align a nano-object with the XR beam.…”

Section: Forthcoming Steps: Coupling Afm With X-ray Techniquesmentioning

confidence: 99%

Structure and Nanomechanics of Model Membranes by Atomic Force Microscopy and Spectroscopy: Insights into the Role of Cholesterol and Sphingolipids

et al. 2016

View full text Add to dashboard Cite

Biological membranes mediate several biological processes that are directly associated with their physical properties but sometimes difficult to evaluate. Supported lipid bilayers (SLBs) are model systems widely used to characterize the structure of biological membranes. Cholesterol (Chol) plays an essential role in the modulation of membrane physical properties. It directly influences the order and mechanical stability of the lipid bilayers, and it is known to laterally segregate in rafts in the outer leaflet of the membrane together with sphingolipids (SLs). Atomic force microscope (AFM) is a powerful tool as it is capable to sense and apply forces with high accuracy, with distance and force resolution at the nanoscale, and in a controlled environment. AFM-based force spectroscopy (AFM-FS) has become a crucial technique to study the nanomechanical stability of SLBs by controlling the liquid media and the temperature variations. In this contribution, we review recent AFM and AFM-FS studies on the effect of Chol on the morphology and mechanical properties of model SLBs, including complex bilayers containing SLs. We also introduce a promising combination of AFM and X-ray (XR) techniques that allows for in situ characterization of dynamic processes, providing structural, morphological, and nanomechanical information.

show abstract

In situbending of an Au nanowire monitored by micro Laue diffraction

Cited by 38 publications

References 31 publications

Controlling dislocation nucleation-mediated plasticity in nanostructures via surface modification

Controlling dislocation nucleation-mediated plasticity in nanostructures via surface modification

<em>In-Situ</em> Coherent X-Ray Diffraction during Three-Point Bending of a Au Nanowire: Visualization and Quantification

Structure and Nanomechanics of Model Membranes by Atomic Force Microscopy and Spectroscopy: Insights into the Role of Cholesterol and Sphingolipids

Contact Info

Product

Resources

About