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Linking the Chemistry and Physics of Electronic Charge Transfer in Insulators: Theory and Experiment

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The surface states model is successful in predicting many salient features of charge transfer in insulative materials, which is critical to electrophotography. This paper will discuss how the surface chemistry controls the physics, the chemical potentials, and how it fits the surface states model. The interrelationship of acid-base Ka/Kb values of the materials in contact, measured by IGC (inverse gas chromatography), the HOMO (highest occupied molecular orbitals) and LUMO (lowest unoccupied molecular orbitals) and their excited states calculated using DFT (density functional theory) quantum mechanical modeling, the chemical potentials measured by the Kelvin method, and triboelectric charging data are studied. It will be shown that a precursor complex of the contacting materials, prior to the charge transfer event, can be calculated by DFT to predict both qualitatively and quantitatively triboelectric charging. The work focuses on PTFE, Kynar and PMMA polymers, as well as silica, titania and alumina.

Document Type: Research Article

Publication date: January 1, 2012

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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