Electrical and humidity-sensing characterization of inkjet-printed multi-walled carbon nanotubes for smart packaging
2013 (English)In: IEEE SENSORS 2013 - Proceedings, IEEE , 2013, 1-4 p.Conference paper (Refereed)
Printing is considered a cost-effective way to fabricate electronics on unconventional substrates enabling, for example, smart packaging. Functionalized multi-walled carbon nanotubes (f-MWCNTs) having carboxylic groups on their surfaces possess great potential as flexible resistive humidity sensor. In this paper, we report on the inkjet printing and characterization of f-MWCNTs in terms of sheet resistance and humidity-sensitivity. Stable f-MWCNTs ink is formulated using aqueous ethylene glycol as solvent. Sheet resistance of printed f-MWCNTs films on polyimide foil reduces by increasing the number of printed layers as well as post-printing annealing temperature. Meanwhile, the raised annealing temperature degrades the films' humidity-sensitivity, which could be explained by the loss of the carboxylic groups. The electrical and sensing properties of f-MWCNTs also have a negative temperature coefficient regarding ambient temperature, which should be considered in practical application.
Place, publisher, year, edition, pages
IEEE , 2013. 1-4 p.
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-134222DOI: 10.1109/ICSENS.2013.6688306ScopusID: 2-s2.0-84893924602ISBN: 978-1-4673-4640-5OAI: oai:DiVA.org:kth-134222DiVA: diva2:665624
12th IEEE SENSORS 2013 Conference; Baltimore, MD; United States; 4 November 2013 through 6 November 2013
ProjectsiPack Vinnova CenterEuropean FP7 CLIP
QC 201402072013-11-202013-11-202016-04-18Bibliographically approved