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Mechanics of Gold Nanoparticle Superlattices at High Hydrostatic Pressures

Journal Article · · Journal of Physical Chemistry. C

Pressure-driven assembly of ligand-grafted gold nanoparticle superlattices is a promising approach for fabricating gold nanostructures, such as nanowires and nanosheets. Optimizing this fabrication method will require extending our understanding of superlattice mechanics to regimes of high pressures. We use molecular dynamics simulations to characterize the response of alkanethiol-grafted gold nanoparticle superlattices to applied hydrostatic pressures up to 15 GPa. At low applied pressures, intrinsic voids govern the mechanics of compaction. As applied pressures increase, the void collapse and ligand compression depend significantly on the ligand length. These microstructural observations correlate directly with trends in bulk modulus and elastic constants. For short ligands, core–core contact between gold nanoparticles is observed at high pressures, which augurs irreversible response and eventual sintering. In conclusion, this presintering behavior was unexpected under hydrostatic loading and is observed only for the shortest ligands.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1544800
Report Number(s):
SAND--2019-7838J; 677235
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 28 Vol. 123; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (55)

Crystallinity dynamics of gold nanoparticles during sintering or coalescence journal December 2015
Pressure-Driven Assembly of Spherical Nanoparticles and Formation of 1D-Nanostructure Arrays journal July 2010
Polymer grafted nanoparticles: Effect of chemical and physical heterogeneity in polymer grafts on particle assembly and dispersion journal February 2013
Fabrication and Mechanical Properties of Large-Scale Freestanding Nanoparticle Membranes journal June 2010
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Conformational Equilibria of Organic Adsorbates on Nanostructures in Aqueous Solution: MD Simulations journal October 2015
Polymer-Grafted Nanoparticle Membranes with Controllable Free Volume journal September 2017
Ligand-Mediated Interactions between Nanoscale Surfaces Depend Sensitively and Nonlinearly on Temperature, Facet Dimensions, and Ligand Coverage journal January 2016
Soft Skyrmions, Spontaneous Valence and Selection Rules in Nanoparticle Superlattices journal May 2017
Colloidal Stability of Apolar Nanoparticles: The Role of Particle Size and Ligand Shell Structure journal May 2018
Templated Techniques for the Synthesis and Assembly of Plasmonic Nanostructures journal June 2011
Optimization of the OPLS-AA Force Field for Long Hydrocarbons journal March 2012
Structures and Properties of Self-Assembled Monolayers of Bistable [2]Rotaxanes on Au (111) Surfaces from Molecular Dynamics Simulations Validated with Experiment journal February 2005
Thiol-Functionalized, 1.5-nm Gold Nanoparticles through Ligand Exchange Reactions:  Scope and Mechanism of Ligand Exchange journal February 2005
The Role of Order, Nanocrystal Size, and Capping Ligands in the Collective Mechanical Response of Three-Dimensional Nanocrystal Solids journal July 2010
Nanostructured Gold Architectures Formed through High Pressure-Driven Sintering of Spherical Nanoparticle Arrays journal September 2010
Development and Testing of the OPLS All-Atom Force Field on Conformational Energetics and Properties of Organic Liquids journal January 1996
Many-Body Effects in Nanocrystal Superlattices: Departure from Sphere Packing Explains Stability of Binary Phases journal March 2015
Development of Many−Body Polarizable Force Fields for Li-Battery Components:  1. Ether, Alkane, and Carbonate-Based Solvents journal March 2006
Molecular Dynamics Simulation Study of Self-Assembled Monolayers of Alkanethiol Surfactants on Spherical Gold Nanoparticles journal November 2007
Structure of Mixed-Monolayer-Protected Nanoparticles in Aqueous Salt Solution from Atomistic Molecular Dynamics Simulations journal September 2013
Mechanical Properties of Au Supracrystals Tuned by Flexible Ligand Interactions journal February 2014
Structure and Thermodynamics of Self-Assembled Monolayers on Gold Nanocrystallites journal August 1998
Structures of self-assembled monolayer films of organosulfur compounds adsorbed on gold single crystals: electron diffraction studies journal May 1988
Effects of Functional Groups and Ionization on the Structure of Alkanethiol-Coated Gold Nanoparticles journal September 2014
Mechano-Chemical Stability of Gold Nanoparticles Coated with Alkanethiolate SAMs journal January 2008
Mechanical Properties of Face-Centered Cubic Supercrystals of Nanocrystals journal July 2010
Fluctuation-Driven Anisotropic Assembly in Nanoscale Systems journal May 2013
Orientational Ordering of Passivating Ligands on CdS Nanorods in Solution Generates Strong Rod–Rod Interactions journal December 2013
Deviatoric Stress-Driven Fusion of Nanoparticle Superlattices journal August 2014
Shape-Anisotropy Driven Symmetry Transformations in Nanocrystal Superlattice Polymorphs journal February 2011
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
Elastic membranes of close-packed nanoparticle arrays journal July 2007
Anisotropic self-assembly of spherical polymer-grafted nanoparticles journal March 2009
Topological structure prediction in binary nanoparticle superlattices journal January 2017
Small is different: energetic, structural, thermal, and mechanical properties of passivated nanocluster assemblies journal January 2004
Assessing the relevance of building block crystallinity for tuning the stiffness of gold nanocrystal superlattices journal January 2013
Understanding interactions between capped nanocrystals: Three-body and chain packing effects journal September 2009
Explicit all-atom modeling of realistically sized ligand-capped nanocrystals journal March 2012
Strain fluctuations and elastic constants journal March 1982
Reversible multiple time scale molecular dynamics journal August 1992
Constant pressure molecular dynamics algorithms journal September 1994
Coating thickness and coverage effects on the forces between silica nanoparticles in water journal May 2014
AIREBO-M: A reactive model for hydrocarbons at extreme pressures journal January 2015
Elastic properties of gold supracrystals: Effects of nanocrystal size, ligand length, and nanocrystallinity journal April 2016
Embedded-atom-method functions for the fcc metals Cu, Ag, Au, Ni, Pd, Pt, and their alloys journal June 1986
First-principles and classical molecular dynamics simulation of shocked polymers journal February 2010
Ligand structure and mechanical properties of single-nanoparticle-thick membranes journal June 2015
Spontaneous Asymmetry of Coated Spherical Nanoparticles in Solution and at Liquid-Vapor Interfaces journal June 2010
High Strength, Molecularly Thin Nanoparticle Membranes journal December 2014
The Impact of Nanoscience on Heterogeneous Catalysis journal March 2003
Oriented Assembly of Metamaterials journal July 2009
Self-Assembled Plasmonic Nanoparticle Clusters journal May 2010
Nonadditivity of nanoparticle interactions journal October 2015

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