Pressure Processing of Nanocube Assemblies Toward Harvesting of a Metastable PbS Phase

Adv Mater. 2015 Aug 19;27(31):4544-9. doi: 10.1002/adma.201502070. Epub 2015 Jul 14.

Abstract

This materials-by-design approach combines nanocrystal assembly with pressure processing to drive the attachment and coalescence of PbS nanocubes along directed crystallographic dimensions to form a large 3D porous architecture. This quenchable and strained mesostructure holds the storage of large internal stress, which stabilizes the high-pressure PbS phase in atmospheric conditions. Nanocube fusion enhances the structural stability; the large surface area maintains the size-dependent properties.

Keywords: metastable phases; nanocrystal assemblies; porous architectures; pressure processing.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Lead* / chemistry
  • Microscopy, Electron, Scanning
  • Microscopy, Electron, Transmission
  • Nanoparticles* / chemistry
  • Nanotechnology / methods
  • Particle Size
  • Phase Transition*
  • Porosity
  • Pressure*
  • Scattering, Small Angle
  • Stress, Mechanical
  • Sulfides* / chemistry
  • X-Ray Diffraction

Substances

  • Sulfides
  • lead sulfide
  • Lead