title: Molecular dynamics study on Au/Fe3O4 nanocomposites and their surface function toward amino acids.
abstract: The deposition of gold nanoparticles on the magnetite (Fe(3)O(4)) surface is demonstrated through a molecular dynamics method. The simulated results show that an intermediate layer composed by such as a surfactant, polymer, or silica plays a key role in the formation of core/shell Fe(3)O(4)/Au nanostructures. The functional groups of the intermediate layer are crucial factors in depositing gold onto the Fe(3)O(4) surface via nonbonding interactions, in which the van der Waals and columbic forces will determine the strength of interaction toward the gold and iron oxide. Such interactions can affect the stability of the metal-coated nanocomposites and hence the functional properties. The nanocomposite is further investigated on the surface adsorption of amino acids (e.g., cysteine), which may be useful for functional exploration in biomedical applications.
authors: School of Materials Science and Engineering, University of New South Wales, Sydney NSW 2052, Australia.
authors: Jeffrey
authors: J
authors: Yue
authors: Xuchuan
authors: X
authors: Jiang
authors: Aibing
authors: A
authors: Yu
mesh_terms: D000327:Adsorption; D000596:Amino Acids / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008280:Magnetics; D053768:Metal Nanoparticles / Q000737:chemistry; D056004:Molecular Dynamics Simulation; D053761:Nanocomposites / Q000737:chemistry*; D055672:Static Electricity; D013499:Surface Properties
chemical_list: D000596:Amino Acids; D006046:Gold; D052203:Ferrosoferric Oxide