Geyer, Tihamer and Born, Philip and Kraus, Tobias (2012) Switching Between Crystallization and Amorphous Agglomeration of Alkyl Thiol-Coated Gold Nanoparticles. Physical Review Letters, 128302-1-128302-5. DOI: 10.1103/PhysRevLett.109.128302.
Full text not available from this repository.
Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.109.128302
Crystalline and amorphous materials composed of the same atoms exhibit strikingly different proper- ties. Likewise, the behavior of materials composed of mesoscale particles depends on the arrangement of their constituent particles. Here, we demonstrate control over particle arrangement during agglomeration. We obtain disordered and ordered agglomerates of the same alkyl thiol-coated gold nanoparticles depending on temperature and solvent. We find that ordered agglomeration occurs exclusively above the melting temperature of the ligand shells. Many-particle simulations show that the contact mechanics of the ligand shells dominate the order-disorder transition: Purely spherical particle-particle interactions yield order, whereas localized ‘‘stiction’’ between the ligand shells leads to disorder. This indicates that the ‘‘stickiness’’ and the packing of the agglomerates can be switched by the state of the ligand shells. It suggests that contact mechanics govern ordering in a wide range of nanoparticles.
|Title:||Switching Between Crystallization and Amorphous Agglomeration of Alkyl Thiol-Coated Gold Nanoparticles|
|Date:||17 September 2012|
|Journal or Publication Title:||Physical Review Letters|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Keywords:||Nanopartikel, Kristallisation, Strukturbildung|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||Research under Space Conditions|
|DLR - Research area:||Raumfahrt|
|DLR - Program:||R FR - Forschung unter Weltraumbedingungen|
|DLR - Research theme (Project):||R - Vorhaben Materialwissenschaftliche Forschung|
|Institutes and Institutions:||Institute of Materials Physics in Space|
|Deposited By:||Philip Born|
|Deposited On:||02 Oct 2012 08:40|
|Last Modified:||26 Mar 2013 13:42|
Repository Staff Only: item control page