Local charge transport in two-dimensional PbSe nanocrystal arrays studied by electrostatic force microscopy

Nano Lett. 2005 Jul;5(7):1463-8. doi: 10.1021/nl050828p.

Abstract

Two-dimensional PbSe nanocrystal arrays on silicon nitride membranes were investigated using electrostatic force microscopy (EFM) and transmission electron microscopy (TEM). Changes in lattice and transport properties upon annealing in a vacuum were revealed. Local charge transport behavior was directly imaged by EFM and correlated to nanopatterns observed with TEM. Charge transport through nanochannels in complex two-dimensional nanocrystal networks was identified. Our results demonstrate the importance of measurements of local transport details complementary to the conventional current-voltage (I-V) measurements.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Crystallization / methods*
  • Electric Conductivity
  • Electrochemistry / instrumentation
  • Electrochemistry / methods*
  • Electron Transport
  • Lead / analysis
  • Lead / chemistry*
  • Materials Testing
  • Microscopy, Scanning Probe / methods*
  • Nanostructures / analysis
  • Nanostructures / chemistry*
  • Nanostructures / ultrastructure
  • Selenium Compounds / analysis
  • Selenium Compounds / chemistry*
  • Static Electricity
  • Surface Properties

Substances

  • Selenium Compounds
  • lead selenide
  • Lead