Three-Dimensional and Microstructural Fingerprinting of Gold Nanoparticles at Fluid-Mineral Interfaces
نویسندگان
چکیده
Abstract Recent studies have identified gold nanoparticles in ores a range of deposit types, but little is known about their formation processes. In this contribution, gold-bearing magnetite from the well-documented, world-class Beiya Au deposit, China, was investigated terms microstructure and crystallography at nanoscale. We present first three-dimensional (3D) focused ion beam/scanning electron microscopy (FIB/SEM) tomography distribution nanopores low-Si magnetite. The porous magnetite, which overprints an earlier generation silician formed by coupled dissolution-reprecipitation reaction (CDRR). extrinsic changes thermodynamic conditions (e.g., S content temperature) hydrothermal fluids resulted CDRR disequilibrium Au-Bi melts. crystallized Au-supersaturated originating melts grew two ways depending on intrinsic crystal structure pore textures: (1) heteroepitaxial growth utilizing (111) lattice planes (2) randomly oriented nucleation growth. Therefore, study unravels how factors drove fluid-mineral interfaces.
منابع مشابه
Gold Aerogels: Three-Dimensional Assembly of Nanoparticles and Their Use as Electrocatalytic Interfaces
Three-dimensional (3D) porous metal nanostructures have been a long sought-after class of materials due to their collective properties and widespread applications. In this study, we report on a facile and versatile strategy for the formation of Au hydrogel networks involving the dopamine-induced 3D assembly of Au nanoparticles. Following supercritical drying, the resulting Au aerogels exhibit h...
متن کاملhistological evaluation of the effect of three medicaments; trichloracetic acid, formocresol and mineral trioxide aggregate on pulpotomized teeth of dogs
چکیده ندارد.
15 صفحه اولThree dimensional tracking of gold nanoparticles using digital holographic microscopy
The tracking of nano-scale biological markers in motion is a challenging project, that could lead to a better understanding of dynamics in biological systems. Since digital holography gives access to the whole light field in a volume from a single hologram [1, 2], this technique is suitable to reconstruct the field scattered by gold particles in three dimensions, and then determine their positi...
متن کاملSolvent-mediated interactions between nanoparticles at fluid interfaces.
We investigate the solvent-mediated interactions between nanoparticles adsorbed at a liquid-vapor interface in comparison to the solvent-mediated interactions in the bulk liquid and vapor phases of a Lennard-Jones solvent. Molecular dynamics simulation data for the latter are in good agreement with results from integral equations in the reference functional approximation and a simple geometric ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: American Mineralogist
سال: 2021
ISSN: ['0003-004X', '1945-3027']
DOI: https://doi.org/10.2138/am-2021-7696