Extended-conjugation π-electron systems in carbon nanotubes
Autor: | Kazuhiro Yanagi, Yasumitsu Miyata, Yuta Yamamoto, Shigeo Arai, Kenshi Miyaura, Hisanori Shinohara, Ryo Kitaura, Boanerges Thendie, Hiromichi Kataura |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
lcsh:Medicine
Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry Electrochromic devices 01 natural sciences Article law.invention chemistry.chemical_compound law Thiophene Absorption (electromagnetic radiation) lcsh:Science chemistry.chemical_classification Multidisciplinary Doping lcsh:R Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Polymerization Transmission electron microscopy lcsh:Q 0210 nano-technology |
Zdroj: | Scientific Reports, Vol 8, Iss 1, Pp 1-6 (2018) Scientific Reports |
ISSN: | 2045-2322 |
Popis: | Extending π-electron systems are among the most important topics in physics, chemistry and materials science because they can result in functional materials with applications in electronics and optics. Conventional processes for π-electron extension, however, can generate products exhibiting chemical instability, poor solubility or disordered structures. Herein, we report a novel strategy for the synthesis of π-conjugated polymers within the interiors of carbon nanotubes (CNTs). In this process, thiophene-based oligomers are encapsulated within CNTs as precursors and are subsequently polymerized by thermal annealing. This polymerization increases the effective conjugation length of the thiophenes, as confirmed by transmission electron microscopy and absorption peak red shifts. This work also demonstrates that these polythiophenes can serve as effective markers for individual CNTs during Raman imaging with single-wavelength laser excitation due to their strong absorbance. In addition, stable carrier injection into the encapsulated polythiophenes is found to be possible via electrochemical doping. Such doping has the potential to produce π-electron-based one-dimensional conductive wires and highly stable electrochromic devices. |
Databáze: | OpenAIRE |
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