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Thermomechanical Response of Self-Assembled Nanoparticle Membranes
ACS Nano (2017)
  • Sean P. McBride, Marshall University
Monolayers composed of colloidal nanoparticles, with a thickness of less than 10 nm, have remarkable mechanical moduli and can suspend over micrometer-sized holes to form free-standing membranes. In this paper, we discuss experiments and coarse-grained molecular dynamics simulations characterizing the thermomechanical properties of these self-assembled nanoparticle membranes. These membranes remain strong and resilient up to temperatures much higher than previous simulation predictions and exhibit an unexpected hysteretic behavior during the first heating−cooling cycle. We show this hysteretic behavior can be explained by an asymmetric ligand configuration from the self-assembly process and can be controlled by changing the ligand coverage or cross-linking the ligand molecules. Finally, we show the screening effect of water molecules on the ligand interactions can largely change the moduli and thermomechanical behavior.
  • Nanoparticles,
  • membranes,
  • nanoparticle membranes,
  • Young's modulus,
  • moduli,
  • thermomechanical,
  • coarse grained,
  • molecular dyanamics
Publication Date
Summer July 17, 2017
Citation Information
Sean P. McBride. "Thermomechanical Response of Self-Assembled Nanoparticle Membranes" ACS Nano (2017)
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