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Title: Size-dependent thermopower of nickel nanoparticles

Nickel nanoparticles (Ni-NPs) were prepared by thermal decomposition method using Trioctylphosphine (TOP) and Oleylamine (OA). The average particle size (D) estimated from X-ray diffraction (XRD) using Scherrer equation, to be 1-10nm, systematically decreases with increasing concentration of TOP at constant OA concentration. The observed thermopower strongly depends on particle size particularly at low temperatures reaching a very high value of ∼ 10{sup 5} μV/K (at 20 K), and is attributed to the enhanced grain-boundary scattering combined with quantum confinement.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics, ISLE, IPS Academy, Rajendra Nagar, Indore-452012, Madhya Pradesh (India)
  2. Department of Physics, Government Holkar Science College, A. B. Road, Indore 452017, Madhya Pradesh (India)
  3. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452017, Madhya Pradesh (India)
Publication Date:
OSTI Identifier:
22269307
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY; CHEMICAL PREPARATION; GRAIN BOUNDARIES; NANOSTRUCTURES; NICKEL; PARTICLE SIZE; PARTICLES; PYROLYSIS; X-RAY DIFFRACTION