Effect of increased stability of peptide-based coatings in the Casimir regime via nanoparticle doping

Abstract

We find that thin peptide films and coatings doped with metallic nanoparticles are more stable due to the role of electromagnetic fluctuations. It is shown that for the doped freestanding in vacuum peptide film the Casimir attraction becomes larger in magnitude. For dielectric substrates coated with peptide films, the nanoparticle doping leads to a wider range of film thicknesses where the Casimir pressure is attractive and to larger pressure magnitudes at the points of extremum. The doping of peptide coatings with magnetic nanoparticles preserves all the advantages of nonmagnetic ones and simultaneously imparts superparamagnetic properties to the coating which could extend significantly the application areas of bioelectronics.

6 pages, 4 figures

References in corpus (6)

• Observability of thermal effects in the Casimir interaction from graphene-coated substrates
• Magnetic materials and the problem of thermal Casimir force
• Low-temperature behavior of the Casimir free energy and entropy of metallic films
• Impact of magnetic nanoparticles on the Casimir pressure in three-layer systems
• Fluctuation-induced free energy of thin peptide films
• Casimir free energy and pressure for magnetic metal films

Cited by in corpus (4)

• Casimir pressure in peptide films on metallic substrates: Change of sign via graphene coating
• Fluctuation-induced dispersion forces on thin DNA films
• Attractive and repulsive fluctuation-induced pressure in peptide films deposited on semiconductor substrates
• The Casimir free energy of peptide films on a silicon substrate: Impact of dielectric-to-metal transition in silicon and nanoparticles in peptide