DocumentCode :
2517997
Title :
Characterization of Inkjet Printed MWCNT in Colloidal and Conductive Polymer Solution
Author :
Lok, B.K. ; Liang, Y.N. ; Ng, Y.M. ; Hu, X.
Author_Institution :
Singapore Inst. of Manuf. Technol., Singapore, Singapore
fYear :
2008
fDate :
9-12 Dec. 2008
Firstpage :
285
Lastpage :
290
Abstract :
In this paper, multi-walled carbon nanotube (MWCNT) ink was selectively patterned by inkjet printing on substrates to form conductive traces and electrodes for interconnection application. MWCNT was firstly functionalized using concentrated acid and dispersed in deionized water to form a colloidal solution. Various concentrations of MWCNT were formulated to test the stability of the solution. The printability of the MWCNT ink was examined against printing temperature, ink concentration and ink droplet pitch. Rheological properties of the ink were determined by rheometer and sessile drop method. The electrical conductivity of the MWCNT pattern was measured against multiple printing of MWCNT on the same pattern (up to 10 layers). While single layer printing pattern exhibited highest resistance, the CNT entangled together and formed a random network with more printed layers has higher conductivity. The electrical properties of the printed film was compared to a composite ink of CNT and conducting polymer (CNT ink was mixed with conductive polymer solution, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)). Scanning electron microscopy (SEM) was used to observe the surface structure and atomic force microscopy (AFM) was used to study the morphology of the printed film under different conditions.
Keywords :
atomic force microscopy; carbon nanotubes; colloids; conducting polymers; electrical conductivity; electrical resistivity; ink jet printing; liquid phase deposited coatings; liquid phase deposition; nanocomposites; organic semiconductors; polymer solutions; rheology; scanning electron microscopy; surface morphology; AFM; C; PEDOT:PSS solution; SEM; atomic force microscopy; colloidal solution; composite ink; conductive polymer solution; conductive traces; droplet pitch; electrical conductivity; electrical resistance; film morphology; inkjet printed MWCNT; multiple printing; multiwalled carbon nanotube ink; poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) solution; printability; printed film; rheological property; rheometer; scanning electron microscopy; selective patterning; sessile drop method; single layer printing pattern; surface structure; Atomic force microscopy; Carbon nanotubes; Conductivity; Electrodes; Ink; Polymer films; Printing; Scanning electron microscopy; Substrates; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronics Packaging Technology Conference, 2008. EPTC 2008. 10th
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2117-6
Electronic_ISBN :
978-1-4244-2118-3
Type :
conf
DOI :
10.1109/EPTC.2008.4763449
Filename :
4763449
Link To Document :
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