Quantitative Kelvin probe force microscopy of current-carrying devices

Fuller E. J., Pan D., Corso B. L., Gul O. T., Gomez J. R., Collins P. G.

Applied Physics Letters, cilt.102, sa.8, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 102 Sayı: 8
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1063/1.4793480
  • Dergi Adı: Applied Physics Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara Hacı Bayram Veli Üniversitesi Adresli: Hayır

Özet

Kelvin probe force microscopy (KPFM) should be a key tool for characterizing the device physics of nanoscale electronics because it can directly image electrostatic potentials. In practice, though, distant connective electrodes interfere with accurate KPFM potential measurements and compromise its applicability. A parameterized KPFM technique described here determines these influences empirically during imaging, so that accurate potential profiles can be deduced from arbitrary device geometries without additional modeling. The technique is demonstrated on current-carrying single-walled carbon nanotubes (SWNTs), directly resolving average resistances per unit length of 70 kΩ/μm in semimetallic SWNTs and 200 kΩ/μm in semiconducting SWNTs. © 2013 American Institute of Physics.