Semiconducting enrichment of arc discharge single-walled carbon nanotubes by density gradient ultracentrifugation
| Autor: | Linda Scharfenberg, Michael Mertig |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Sonication Sorting Analytical chemistry Surfaces and Interfaces Carbon nanotube Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Electric arc Semiconductor law Materials Chemistry Density gradient ultracentrifugation Electrical and Electronic Engineering Spectroscopy business Dispersion (chemistry) |
| Zdroj: | physica status solidi (a). 212:1395-1398 |
| ISSN: | 1862-6300 |
| DOI: | 10.1002/pssa.201431771 |
| Popis: | Due to their intrinsic properties, single-walled carbon nanotubes (SWCNTs) are promising candidates for source-drain channels in field-effect transistors (FETs). However, their application in transistors requires semiconducting tubes, and thus, sorting of SWCNTs according to those. The basis for an efficient sorting is the dispersion of the material that usually includes but is not limited to applying tip sonication in the presence of appropriate amphiphilic molecules. We present a high semiconducting enrichment of surfactant-wrapped arc discharge SWCNTs via sorting according to electronic type by applying density gradient ultracentrifugation (DGU). We utilized a common combination of anionic surfactants, but optimized the sonication time during the dispersion step of the SWCNTs and the duration of performing DGU. Furthermore, we used UV–Vis spectroscopy to determine the differences in the content of metallic (m) and semiconducting (sc) SWCNTs of different samples. By the refinement of the conditions, we have achieved an enrichment of sc-SWCNTs up to 98% in two sorting steps. |
| Databáze: | OpenAIRE |
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