A Switching-Type Positive Temperature Coefficient Behavior Exhibited by PPy/(PhSe)<sub>2</sub> Nanocomposite Prepared by Chemical Oxidative Polymerization
Tabee Jan, Masood Ahmad Rizvi, Syed Kazim Moosvi, Mohd. Hanief Najar, Sajjad Husain Mir, Ghulam Mustafa Peerzada
Abstract
barrier. The maximum barrier height was found to be 0.224 eV. The nanocomposite material was found to exhibit a switching-type positive temperature coefficient (PTC) behavior with a Curie temperature of 400 K. This has been explained by a CBH model wherein PPy chains expand upon heating, thereby reducing the barrier height to facilitate current flow. However, above 400 K, disruption of PPy chains allows to reflect a PTC behavior. This has been in agreement with TG data.
Topics & Concepts
Materials sciencePolymerizationNanocompositePolypyrroleDielectricAnalytical Chemistry (journal)ThermogravimetryFourier transform infrared spectroscopyChemical engineeringChemistryComposite materialPolymerOrganic chemistryInorganic chemistryEngineeringOptoelectronicsConducting polymers and applicationsAdvanced Sensor and Energy Harvesting MaterialsTransition Metal Oxide Nanomaterials