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Title: Wetting kinetics of water nano-droplet containing non-surfactant nanoparticles: A molecular dynamics study

In this Letter, dynamic wetting of water nano-droplets containing non-surfactant gold nanoparticles on a gold substrate is examined via molecular dynamics simulations. The results show that the addition of non-surfactant nanoparticles hinders the nano-second droplet wetting process, attributed to the increases in both surface tension of the nanofluid and friction between nanofluid and substrate. The droplet wetting kinetics decreases with increasing nanoparticle loading and water-particle interaction energy. The observed wetting suppression and the absence of nanoparticle ordering near the contact line of nano-sized droplets differ from the wetting behaviors reported from nanofluid droplets of micron size or larger.
Authors:
 [1] ;  [2] ; ;  [3] ;  [1]
  1. Key Laboratory for Thermal Science and Power Engineering of MOE, Beijing Key Laboratory for CO2 Utilization and Reduction Technology, Tsinghua University, Beijing 100084 (China)
  2. (United States)
  3. Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania 19104 (United States)
Publication Date:
OSTI Identifier:
22253734
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 25; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; DROPLETS; GOLD; KINETICS; MOLECULAR DYNAMICS METHOD; NANOSTRUCTURES; PARTICLE INTERACTIONS; SIMULATION; SUBSTRATES; SURFACE TENSION; SURFACTANTS; WATER