3 years ago

Water-Processable Multiwalled Nanotube: Phenol-Induced Reversible Oxidation Process and Ambipolar Charge Transport Property

Water-Processable Multiwalled Nanotube: Phenol-Induced Reversible Oxidation Process and Ambipolar Charge Transport Property
Ju Huang, Yan-Yun Jiang
Due to the fascinating electronic, thermal, and mechanical properties of single-walled carbon nanotubes (SWCNTs), extensive efforts have been devoted to the development of SWCNT-based materials. These materials' semiconducting properties and related applications, such as field-effect transistors (FETs), have been investigated by researchers for many years. However, despite the significant progress achieved, it remains challenging to separate semiconducting and metallic nanotubes from the mixtures of as-grown SWCNTs. In a few studies, composites of water-processable phenol formaldehyde resin/multiwalled carbon nanotubes (MWCNTs) have been found to exhibit a quasireversible oxidation process and to behave as semiconductors or field-effect transistors. This finding has rarely been reported for MWCNTs, and it differs greatly from findings regarding intrinsic semiconductive SWCNTs. Significantly, field-effect transistors fabricated with MWCNT composites as their semiconductor active layers have shown ambipolar charge transport characteristics. The results provide a high value-added application pathway for the application of polymer/MWCNTs as the FET materials for electronic devices that offer higher performance at a lower cost. A multiwalled carbon nanotube (MWCNT) suspension is doped with water-soluble sulfobutylated phenol formaldehyde resin (BSPF), for the first time. BSPF shows highly enhance dispersion stability and the BSPF-MWCNT composites display a reversible oxidation process. More significantly, the field-effect transistor devices using BSPF-MWCNTs film as an active layer exhibit both p-type and n-type field-effect characteristics.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/mame.201700575

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