Enhanced Electrical Transport in Carbon Nanotube Thin Films through Defect Modulation
| Autor: | Brian J. Landi, Nathanael D. Cox, Andrew R. Bucossi, Andrew Merrill, Ivan Puchades, Sheila M. Goodman, Jamie E. Rossi, Cory D. Cress |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Physics::Instrumentation and Detectors Annealing (metallurgy) Physics::Medical Physics Analytical chemistry 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences Fluence law.invention Ion Condensed Matter::Materials Science law Electrical resistivity and conductivity Irradiation Physical and Theoretical Chemistry Thin film business.industry 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Optoelectronics 0210 nano-technology business Forming gas |
| Zdroj: | The Journal of Physical Chemistry C. 120:15488-15495 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b04881 |
| Popis: | The electrical properties of single-wall carbon nanotube (SWCNT) thin films were enhanced through defect introduction and subsequent thermal annealing in forming gas. The defect density in the SWCNT thin films was modulated using ion irradiation with 150 keV 11B+ over the fluence range of 1 × 1013 and 1 × 1015 ions/cm2. Following thermal annealing at 1000 °C in forming gas, partial recovery in the optical absorbance and Raman spectra is observed at all fluences studied, with 100% recovery observed in samples exposed to a fluence less than 5 × 1013 ions/cm2. By comparison, annealing yields near complete recovery of the electrical conductivity at all fluences studied (up to 1 × 1015 ions/cm2). Remarkably, radiation exposure up to a fluence of 1 × 1014 ions/cm2 followed by thermal annealing improves the electrical conductivity, exceeding the as-purified value by as much as ∼4×. These results implicate the origin of the enhanced SWCNT network conductance with the formation of transport-enhancing inter-SWCNT b... |
| Databáze: | OpenAIRE |
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