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Global Alignment of Carbon Nanotubes via High Precision Microfluidic Dead-End Filtration

Rust, C.; Li, H.; Gordeev, G.; Spari, M.; Guttmann, M.; Jin, Q.; Reich, S.; Flavel, B. S.

Single wall carbon nanotubes (SWCNTs) dispersed by negatively charged sodium deoxycholate (DOC) or positively charged cetrimonium bromide (CTAB) are shown to assemble into aligned films (3.8 cm$^{2}$) on polycarbonate membranes by slow flow dead-end filtration. Global alignment (S$_{2D max}$≈ 0.85) is obtained on both pristine polyvinylpyrrolidone (PVP) coated membranes and those with an intentional 150–600 nm groove pattern from hot embossing. In all cases, a custom microfluidic setup capable of precise control and measurement of the volume rate, transmembrane pressure, and the filtration resistance is used to follow SWCNT film formation. Conditions associated with the formation of SWCNT crystallites or their global alignment are identified and these are discussed in terms of membrane fouling and the interaction potential between the surface of the membrane and nanotubes. SWCNT alignment is characterized by cross-polarized microscopy, atomic force microscopy, scanning electron microscopy (SEM), and Raman spectroscopy.

Verlagsausgabe §
DOI: 10.5445/IR/1000139758
Veröffentlicht am 12.11.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1616-301X, 1057-9257, 1099-0712, 1616-3028
KITopen-ID: 1000139758
HGF-Programm 43.31.02 (POF IV, LK 01) Devices and Applications
Erschienen in Advanced Functional Materials
Verlag Wiley-VCH Verlag
Nachgewiesen in Scopus
Web of Science
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