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Discrete plasticity in sub-10-nm-sized gold crystals

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms1149· OSTI ID:1623835
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [7];  [8]
  1. Univ. of Pittsburgh, PA (United States). Dept. of Mechanical Engineering and Materials Science; Wuhan Univ. (China). MOE Key Laboratory of Artificial Micro- and Nano-structures. Center for Electron Microscopy. School of Physics and Technology; DOE/OSTI
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Civil and Environmental Engineering
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Materials Science and Engineering Center
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
  5. Shenyang National Lab. for Materials Science (China). Inst. of Metal Research
  6. Wuhan Univ. (China). MOE Key Laboratory of Artificial Micro- and Nano-structures. Center for Electron Microscopy. School of Physics and Technology
  7. Washington Univ., St. Louis, MO (United States). Dept. of Biomedical Engineering
  8. Univ. of Pittsburgh, PA (United States). Dept. of Mechanical Engineering and Materials Science

Although deformation processes in submicron-sized metallic crystals are well documented, the direct observation of deformation mechanisms in crystals with dimensions below the sub10-nm range is currently lacking. Here, through in situ high-resolution transmission electron microscopy (HRTEM) observations, we show that (1) in sharp contrast to what happens in bulk materials, in which plasticity is mediated by dislocation emission from Frank-Read sources and multiplication, partial dislocations emitted from free surfaces dominate the deformation of gold (Au) nanocrystals; (2) the crystallographic orientation (Schmid factor) is not the only factor in determining the deformation mechanism of nanometre-sized Au; and (3) the Au nanocrystal exhibits a phase transformation from a face-centered cubic to a body-centered tetragonal structure after failure. These findings provide direct experimental evidence for the vast amount of theoretical modelling on the deformation mechanisms of nanomaterials that have appeared in recent years.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1623835
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Near-ideal theoretical strength in gold nanowires containing angstrom scale twins journal April 2013
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Recoverable plasticity in penta-twinned metallic nanowires governed by dislocation nucleation and retraction journal January 2015
Mechanical work makes important contributions to surface chemistry at steps journal February 2015
A highly flexible and sensitive piezoresistive sensor based on MXene with greatly changed interlayer distances journal October 2017
Discrete shear band plasticity through dislocation activities in body-centered cubic tungsten nanowires journal March 2018
Key role of excess atomic volume in structural rearrangements at the front of moving partial dislocations in copper nanocrystals journal March 2019
Electron beam-assisted healing of nanopores in magnesium alloys journal May 2013
Surface Plasmon Resonance-Induced Stiffening of Silver Nanowires journal May 2015
Unconventional seed-mediated growth of ultrathin Au nanowires in aqueous solution journal January 2015
Consecutive crystallographic reorientations and superplasticity in body-centered cubic niobium nanowires journal July 2018
A Review on Size‐Dependent Mechanical Properties of Nanowires journal May 2019
Fracture of Sub-20nm Ultrathin Gold Nanowires journal August 2011
Nucleation-Controlled Plasticity of Metallic Nanowires and Nanoparticles journal July 2018
Syntheses and Properties of Metal Nanomaterials with Novel Crystal Phases journal April 2018
Controllable Elasticity Storage and Release in CuO−Pt Core-Shell Nanowires journal October 2018
Nucleation-Controlled Distributed Plasticity in Penta-twinned Silver Nanowires journal July 2012
Mechanically Assisted Self-Healing of Ultrathin Gold Nanowires journal April 2018
Advances in Discrete Dislocation Dynamics Modeling of Size-Affected Plasticity book January 2016
Mechanical properties of nanoporous gold subjected to tensile stresses in real-time, sub-microscopic scale journal June 2019
In Situ TEM Investigation of the Mechanical Behavior of Micronanoscaled Metal Pillars journal September 2012
In situ atomic-scale analysis of Rayleigh instability in ultrathin gold nanowires journal August 2017
Direct Observations of Confined Layer Slip in Cu/Nb Multilayers journal October 2012
In situ experimental mechanics of nanomaterials at the atomic scale journal February 2013
Atomic-scale dynamic process of deformation-induced stacking fault tetrahedra in gold nanocrystals journal August 2013
Merging of metal nanoparticles driven by selective wettability of silver nanostructures journal January 2014
Reversible cyclic deformation mechanism of gold nanowires by twinning–detwinning transition evidenced from in situ TEM journal January 2014
Oxidation-assisted ductility of aluminium nanowires journal June 2014
Liquid-like pseudoelasticity of sub-10-nm crystalline silver particles journal October 2014
Measuring surface dislocation nucleation in defect-scarce nanostructures journal May 2015
Slip-activated surface creep with room-temperature super-elongation in metallic nanocrystals journal November 2016
In situ TEM electrochemistry of anode materials in lithium ion batteries journal January 2011
Plasticity of metal nanowires journal January 2012
Building up strain in colloidal metal nanoparticle catalysts journal January 2015
Room-temperature superplasticity in Au nanowires and their atomistic mechanisms journal January 2019
Surface dislocation nucleation controlled deformation of Au nanowires journal November 2014
Mechanical behaviors of nanowires journal September 2017
Inherent hydrostatic tensile strength of tungsten nanocrystals journal February 2017
Size effect on deformation and fracture of Cu/Ag bi-metal multilayer nano-pillar journal February 2018
Size effects on elasticity, yielding, and fracture of silver nanowires: In situ experiments journal January 2012
Anomalous Tensile Detwinning in Twinned Nanowires journal December 2017
Size-Dependent Grain-Boundary Structure with Improved Conductive and Mechanical Stabilities in Sub-10-nm Gold Crystals journal May 2018
Surface- and Strain-Mediated Reversible Phase Transformation in Quantum-Confined ZnO Nanowires journal November 2019
Orientation domains in a monoclinic Mg–Al–O phase journal May 2018
Mechanics of Crystalline Nanowires: An Experimental Perspective journal January 2017
On the Critical Resolved Shear Stress and its Importance in the Fatigue Performance of Steels and other Metals with Different Crystallographic Structures journal October 2018

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