Delayed ignition of autocatalytic combustion precursors: Low-temperature nanomaterial binder approach to electronically functional oxide films

Myung Gil Kim, Jonathan W. Hennek, Hyun Sung Kim, Mercouri G Kanatzidis, Antonio Facchetti, Tobin J Marks

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Delayed ignition of combustion synthesis precursors can significantly lower metal oxide film formation temperatures. From bulk In 2O 3 precursor analysis, it is shown here that ignition temperatures can be lowered by as much as 150 °C. Thus, heat generation from ∼60 nm thick In 2O 3 films is sufficient to form crystalline In 2O 3 films at 150 °C. Furthermore, we show that the low processing temperatures of sufficiently thick combustion precursor films can be applied to the synthesis of metal oxide nanocomposite films from nanomaterials overcoated/impregnated with the appropriate combustion precursor. The resulting, electrically well-connected nanocomposites exhibit significant enhancements in charge-transport properties vs conventionally processed oxide films while maintaining desirable intrinsic electronic properties. For example, while ZnO nanorod-based thin-film transistors exhibit an electron mobility of 10 -3-10 -2 cm 2 V -1 s -1, encasing these nanorods within a ZnO combustion precursor-derived matrix enhances the electron mobility to 0.2 cm 2 V -1 s -1. Using commercially available ITO nanoparticles, the intrinsically high carrier concentration is preserved during nanocomposite film synthesis, and an ITO nanocomposite film processed at 150 °C exhibits a conductivity of ∼10 S cm -1 without post-reductive processing.

Original languageEnglish
Pages (from-to)11583-11593
Number of pages11
JournalJournal of the American Chemical Society
Volume134
Issue number28
DOIs
Publication statusPublished - Jul 18 2012

Fingerprint

Nanocomposites
Nanocomposite films
Nanostructures
Nanostructured materials
Oxides
Oxide films
Binders
Ignition
Electron mobility
Nanorods
Nanotubes
Temperature
Metals
Combustion synthesis
Heat generation
Electrons
Thin film transistors
Processing
Electronic properties
Transport properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Delayed ignition of autocatalytic combustion precursors : Low-temperature nanomaterial binder approach to electronically functional oxide films. / Kim, Myung Gil; Hennek, Jonathan W.; Kim, Hyun Sung; Kanatzidis, Mercouri G; Facchetti, Antonio; Marks, Tobin J.

In: Journal of the American Chemical Society, Vol. 134, No. 28, 18.07.2012, p. 11583-11593.

Research output: Contribution to journalArticle

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