Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Stress-Induced Structural Transformations in Au Nanocrystals

Journal Article · · Nano Letters
Nanocrystals can exist in multiply twinned structures like icosahedron or single crystalline structures like cuboctahedron. Transformations between these structures can proceed through diffusion or displacive motion. Experimental studies on nanocrystal structural transformations have focused on high-temperature diffusion-mediated processes. Limited experimental evidence of displacive motion exists. We report structural transformation of 6 nm Au nanocrystals under nonhydrostatic pressure of 7.7 GPa in a diamond anvil cell that is driven by displacive motion. X-ray diffraction and transmission electron microscopy were used to detect the structural transformation from multiply twinned to single crystalline. Single crystalline nanocrystals were recovered after unloading, then quickly reverted to the multiply twinned state after dispersion in toluene. Furthermore, the dynamics of recovery was captured using TEM which showed surface recrystallization and rapid twin boundary motion. Molecular dynamics simulations showed that twin boundaries are unstable due to defects nucleated from the interior of the nanocrystal.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1845094
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 10 Vol. 20; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (50)

Shape-Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics? journal December 2008
Seed-Mediated Growth of Colloidal Metal Nanocrystals journal December 2016
Understanding of Strain Effects in the Electrochemical Reduction of CO 2 : Using Pd Nanostructures as an Ideal Platform journal February 2017
On the Thermodynamics and Experimental Control of Twinning in Metal Nanocrystals journal June 2017
Atomic resolution electron microscopy of small metal clusters journal March 1991
Theoretical study of the icosahedral to cuboctahedral structural transition in Rh and Pd clusters journal August 2000
A facile synthesis of monodisperse Au nanoparticles and their catalysis of CO oxidation journal September 2008
Transition from multiply twinned icosahedral to cuboctahedral symmetry in particles of arbitrary size journal August 1994
Density-mediated transport and the glass transition: high pressure viscosity measurements in the diamond anvil cell journal September 1994
Self-diffusion in liquid Fe at high pressure journal April 2002
Nanotwinning: Generation, properties, and application journal July 2020
Size-dependent cuboctahedron-icosahedron transformations of Co-based bimetallic by molecular dynamics simulation journal December 2018
Pressure Induced Nanoparticle Phase Behavior, Property, and Applications journal April 2019
Chemistry and Properties of Nanocrystals of Different Shapes journal April 2005
Deviatoric Stress Driven Formation of Large Single-Crystal PbS Nanosheet from Nanoparticles and in Situ Monitoring of Oriented Attachment journal September 2011
Lattice Contraction and Surface Stress of fcc Nanocrystals journal July 2001
Laser-Induced Shape Transformation of Gold Nanoparticles below the Melting Point:  The Effect of Surface Melting journal March 2005
Surface Diffusion and Coalescence of Mobile Metal Nanoparticles journal May 2005
Transition between Icosahedral and Cuboctahedral Nanoclusters of Lead journal November 2006
Transition from Five-Fold Symmetric to Twinned FCC Gold Particles by Thermally Induced Growth journal December 1998
Sintering of Passivated Gold Nanoparticles under the Electron Beam journal March 2006
Modulating Physical Properties of Isolated and Self-Assembled Nanocrystals through Change in Nanocrystallinity journal January 2013
Real-Time TEM and Kinetic Monte Carlo Studies of the Coalescence of Decahedral Gold Nanoparticles journal October 2009
Atomic packing and short-to-medium-range order in metallic glasses journal January 2006
Superfast assembly and synthesis of gold nanostructures using nanosecond low-temperature compression via magnetic pulsed power journal March 2017
Stress-induced phase transformation and optical coupling of silver nanoparticle superlattices into mechanically stable nanowires journal June 2014
Palladium–platinum core-shell icosahedra with substantially enhanced activity and durability towards oxygen reduction journal July 2015
Tailoring properties and functionalities of metal nanoparticles through crystallinity engineering journal August 2007
Dynamics of Transformation from Platinum Icosahedral Nanoparticles to Larger FCC Crystal at Millisecond Time Resolution journal December 2017
A systematic computational study of the structure crossover and coordination number distribution of metallic nanoparticles journal January 2017
The transformation of cuboctahedral to icosahedral nanoparticles: atomic structure and dynamics journal January 2020
Crossover among structural motifs in transition and noble-metal clusters journal March 2002
X‐Ray Measurement of Stacking Fault Widths in fcc Metals journal November 1961
Melting of icosahedral gold nanoclusters from molecular dynamics simulations journal June 2005
The lattice strains in a specimen (cubic system) compressed nonhydrostatically in an opposed anvil device journal May 1993
Thermally induced solid-solid structural transition of copper nanoparticles through direct geometrical conversion journal April 2013
Nanothermodynamics of iron clusters: Small clusters, icosahedral and fcc-cuboctahedral structures journal May 2017
Phase instabilities in small particles journal August 1990
Elastic strains and the energy balance for multiply twinned particles journal July 1984
Molecular Dynamics Simulation of Icosahedral Transformations in Solid Cu—Co Clusters journal February 2009
Simulating functional magnetic materials on supercomputers journal June 2009
Structural distortions in 5–10 nm silver nanoparticles under high pressure journal October 2008
Nucleation of Dislocations in 3.9 nm Nanocrystals at High Pressure journal March 2020
Structural instability of ultrafine particles of metals journal February 1986
Shellwise Mackay Transformation in Iron Nanoclusters journal August 2007
Structural properties of nanoclusters: Energetic, thermodynamic, and kinetic effects journal May 2005
Distorted f.c.c. arrangement of gold nanoclusters: a model of spherical particles with microstrains and stacking faults journal March 2008
A dense non-crystallographic packing of equal spheres journal September 1962
Oriented attachment induces fivefold twins by forming and decomposing high-energy grain boundaries journal November 2019
Stability of Multiply-Twinned Particles journal October 1969