A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Radial Alignment of Carbon Nanotubes via Dead-End Filtration
Tekijät: Rust C, Schill E, Garrity O, Spari M, Li H, Bacher A, Guttmann M, Reich S, Flavel BS
Kustantaja: WILEY-V C H VERLAG GMBH
Julkaisuvuosi: 2023
Journal: Small
Tietokannassa oleva lehden nimi: SMALL
Lehden akronyymi: SMALL
Artikkelin numero: 2207684
Vuosikerta: 19
Numero: 19
Sivujen määrä: 9
ISSN: 1613-6810
DOI: https://doi.org/10.1002/smll.202207684
Tiivistelmä
Dead-end filtration is a facile method to globally align single wall carbon nanotubes (SWCNTs) in large area films with a 2D order parameter, S-2D, approaching unity. Uniaxial alignment has been achieved using pristine and hot-embossed membranes but more sophisticated geometries have yet to be investigated. In this work, three different patterns with radial symmetry and an area of 3.8 cm(2) are created. Two of these patterns are replicated by the filtered SWCNTs and S-2D values of approximate to 0.85 are obtained. Each of the radially aligned SWCNT films is characterized by scanning cross-polarized microscopy in reflectance and laser imaging in transmittance with linear, radial, and azimuthal polarized light fields. The former is used to define a novel indicator akin to the 2D order parameter using Malu's law, yielding 0.82 for the respective film. The films are then transferred to a flexible printed circuit board and terminal two-probe electrical measurements are conducted to explore the potential of those new alignment geometries.
Dead-end filtration is a facile method to globally align single wall carbon nanotubes (SWCNTs) in large area films with a 2D order parameter, S-2D, approaching unity. Uniaxial alignment has been achieved using pristine and hot-embossed membranes but more sophisticated geometries have yet to be investigated. In this work, three different patterns with radial symmetry and an area of 3.8 cm(2) are created. Two of these patterns are replicated by the filtered SWCNTs and S-2D values of approximate to 0.85 are obtained. Each of the radially aligned SWCNT films is characterized by scanning cross-polarized microscopy in reflectance and laser imaging in transmittance with linear, radial, and azimuthal polarized light fields. The former is used to define a novel indicator akin to the 2D order parameter using Malu's law, yielding 0.82 for the respective film. The films are then transferred to a flexible printed circuit board and terminal two-probe electrical measurements are conducted to explore the potential of those new alignment geometries.
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