title: Highly monodisperse multiple twinned AuCu-Pt trimetallic nanoparticles with high index surfaces.
abstract: Trimetallic nanoparticles possess different properties than their mono- and bi-metallic counterparts, opening a wide range of possibilities for diverse potential applications with the notion to study possible morphology, atomic ordering, reduce precious metal consumption and many others. In this paper, we present a comprehensive experimental study on AuCu-Pt trimetallic nanoparticles with an average diameter of 15 ± 1.0 nm, synthesized in a one-pot synthesis method and characterized by the Cs-corrected scanning transmission electron microscopy technique that allowed us to probe the structure at the atomic level resolution. A new way to control the nanoparticle morphology by the presence of third metal (Pt) is also discussed by the overgrowth of Pt on the as prepared AuCu core by Frank-van der Merwe (FM) layer-by-layer and Stranski-Krastanov (SK) island-on-wetting-layer growth modes. With the application of this research, we are now a step closer to produce optimum catalysts in which the active phase forms only surface monolayers. In addition, the nanoalloy exhibits high index facet surfaces with {211} and {321} families that are highly open-structure surfaces and are interesting for the catalytic applications.
authors: Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA. miguel.yacaman@utsa.edu.
authors: Subarna
authors: S
authors: Khanal
authors: Nabraj
authors: N
authors: Bhattarai
authors: David
authors: D
authors: McMaster
authors: Daniel
authors: D
authors: Bahena
authors: J Jesus
authors: JJ
authors: Velazquez-Salazar
authors: Miguel
authors: M
authors: Jose-Yacaman
mesh_terms: D003300:Copper / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D017348:Microscopy, Electron, Scanning Transmission; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D010984:Platinum; D006046:Gold; D003300:Copper