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Structure and electronic properties of AunPt (n = 1–8) nanoalloy clusters: the density functional theory study

Authors
  • Ranjan, Prabhat1
  • Chakraborty, Tanmoy2, 1
  • 1 Manipal University Jaipur, Dehmi Kalan, Jaipur, 303007, India , Jaipur (India)
  • 2 Presidency University, Bengaluru, 560064, India , Bengaluru (India)
Type
Published Article
Journal
Journal of Nanoparticle Research
Publisher
Springer-Verlag
Publication Date
Jan 17, 2020
Volume
22
Issue
2
Identifiers
DOI: 10.1007/s11051-019-4745-5
Source
Springer Nature
Keywords
License
Yellow

Abstract

The study of bimetallic nanoalloy clusters is of considerable interest due to its interesting electronic, optical, magnetic and catalytic properties. The geometrical structure and electronic properties of AunPt (n = 1–8) nanoalloy clusters are studied by using the density functional theory methodology. The result exhibits that the ground-state configurations of AunPt clusters favour planar confirmation in this molecular range. The most stable cluster is Au3Pt, which is having rhombus structure with symmetry group C2v and can be considered as building blocks for developing large clusters. The computed HOMO-LUMO energy gap of Au3Pt nanoalloy cluster is 1.741 eV. The energy gap in this particular range supports the use of bimetallic clusters as nonlinear optical devices and optoelectronic materials. The DFT-based global descriptors viz. HOMO-LUMO energy gap, electronegativity, hardness, softness and electrophilicity index are also studied. The computed HOMO-LUMO energy gap and chemical hardness exhibit a pronounced odd-even oscillation behaviour as a function of cluster size, n.

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