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Layer-by-Layer Assembly of High-Performance Electroactive Composites Using a Multiple Charged Small Molecule
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.ORCID iD: 0000-0003-1874-2187
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2019 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 35, no 32, p. 10367-10373Article in journal (Refereed) Published
Abstract [en]

Layer-by-layer (LbL) assembly is a versatile tool for fabricating multilayers with tailorable nanostructures. LbL, however, generally relies on polyelectrolytes, which are mostly insulating and induce large interlayer distances. We demonstrate a method in which we replace polyelectrolytes with the smallest unit capable of LbL self-assembly: a molecule with multiple positive charges, tris(3-aminopropyl)amine (TAPA), to fabricate LbL films with negatively charged single-walled carbon nanotubes (CNTs). TAPA introduces less defects during the LbL build-up and results in more efficient assembly of films with denser micromorphology. Twenty bilayers of TAPA/CNT showed a low sheet resistance of 11 k Omega, a high transparency of 91% at 500 nm, and a high electronic conductivity of 1100 S/m on planar substrates. We also fabricated LbL films on porous foams with a conductivity of 69 mS/m and used them as electrodes for supercapacitors with a high specific capacitance of 43 F/g at a discharging current density of 1 A/g.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 35, no 32, p. 10367-10373
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URN: urn:nbn:se:kth:diva-257441DOI: 10.1021/acs.langmuir.9b01587ISI: 000480827000013PubMedID: 31322359Scopus ID: 2-s2.0-85071226711OAI: oai:DiVA.org:kth-257441DiVA, id: diva2:1347993
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QC 20190903

Available from: 2019-09-03 Created: 2019-09-03 Last updated: 2019-09-03Bibliographically approved

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Wang, ZhenOuyang, LiangqiTian, WeiqianErlandsson, JohanMarais, AndrewWågberg, LarsHamedi, Mahiar

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Wang, ZhenOuyang, LiangqiTian, WeiqianErlandsson, JohanMarais, AndrewTybrandt, KlasWågberg, LarsHamedi, Mahiar
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