Transparent conductive film fabrication by carbon nanotube ink spray coating and ink-jet printing

This work explores a method to construct metal-coated carbon nanotube (CNT) structures, which are potential candidates for interconnects, transmission lines and contact structures. This simple method is suitable to many applications including flexible substrates. In this work, electroplating is used to coat a carbon nanotube surface with Indium. CNT films are prepared using drop casting method on different substrates: Ni coated silicon wafer, copy paper and photo paper. The CNT dispersion used for this work is prepared using sonication and centrifugation with a surfactant. The resulting dispersion has 0.8 wt. % of multi-walled CNTs and 0.5 wt. % of sodium dodecyl sulfate (SDS) in DI water. This dispersion is modified to reduce resistivity by adding either silver nanoparticle powder or silver ink. Electroplating is done at room temperature with a current density of 0.02 A/cm2. This work addresses two issues about electroplating on CNT: low electrical conductivity of CNT film and low CNT adhesion to substrate. A CNT film on a Ni surface displays poor adhesion; the film peels off easily during ultrasonication and electroplating. After thermal annealing or microwave treatment, adhesion between the CNT film and Ni is greatly enhanced such that no CNT film peel-off is observed during electroplating. A CNT film on paper has a high sheet resistance. As a result, Indium is only plated on the CNT film near the attached electrode. To reduce the film sheet resistance, the CNT solution is modified by adding silver nanoparticle powder or silver ink. Ethanol rinsing is also performed on the CNT film surface to wash away surfactant and further reduce sheet resistance. On-going work involves ink-jet printing of CNT solutions onto flexible substrates. Indium, as an example metallization, will be plated on these ink-jet printing defined transmission lines and interconnects patterns. Performance of these structures will be presented.

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Transparent Conductive Film Fabrication Using Intercalating Silver Nanoparticles within Carbon Nanotube Layers

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2011.3241 ◽

2011 ◽

Vol 11 (1) ◽

pp. 489-493 ◽

Cited By ~ 7

Author(s):

Youngseok Oh ◽

Daewoo Suh ◽

Young-Jin Kim ◽

Chang-Soo Han ◽

Seunghyun Baik

Keyword(s):

Silver Nanoparticles ◽

Carbon Nanotube ◽

Transparent Conductive Film ◽

Conductive Film ◽

Film Fabrication

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Ink-Jet Printing of Carbon Nanotube Thin-Film Transistors on Flexible Plastic Substrates

Applied Physics Express ◽

10.1143/apex.2.025005 ◽

2009 ◽

Vol 2 ◽

pp. 025005 ◽

Cited By ~ 68

Author(s):

Taishi Takenobu ◽

Noriko Miura ◽

Sheng-Yi Lu ◽

Haruya Okimoto ◽

Takeshi Asano ◽

...

Keyword(s):

Thin Film ◽

Carbon Nanotube ◽

Thin Film Transistors ◽

Ink Jet Printing ◽

Plastic Substrates ◽

Ink Jet ◽

Jet Printing

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Electrical evaluations of anisotropic conductive film manufactured by electrohydrodynamic ink jet printing technology

Organic Electronics ◽

10.1016/j.orgel.2019.105561 ◽

2020 ◽

Vol 78 ◽

pp. 105561 ◽

Cited By ~ 1

Author(s):

Ju-Hun Ahn ◽

Ju-Hwan Choi ◽

Chang-Yull Lee

Keyword(s):

Anisotropic Conductive Film ◽

Printing Technology ◽

Ink Jet Printing ◽

Conductive Film ◽

Ink Jet ◽

Jet Printing

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Application of Ink-Jet Printing and Spray Coating for the Fabrication of Polyaniline/Poly(N-Vinylpyrrolidone)-Based Ammonia Gas Sensor

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.644.61 ◽

2015 ◽

Vol 644 ◽

pp. 61-64 ◽

Cited By ~ 1

Author(s):

Nikola Peřinka ◽

Markéta Držková ◽

Danijela V. Randjelović ◽

Paolo Bondavalli ◽

Milena Hajná ◽

...

Keyword(s):

Gas Sensor ◽

Spray Coating ◽

Chemical Oxidation ◽

Electrical Measurements ◽

Large Area ◽

Ammonia Gas ◽

Ink Jet Printing ◽

Vis Spectroscopy ◽

Ink Jet ◽

Jet Printing

We report on the preparation of thin conducting films from the poly (N-vinylpyrrolidone) stabilized polyaniline dispersions for the ammonia gas sensor applications. The dispersion is water-based and prepared by means of relatively simple chemical oxidation polymerization of aniline. Two processes were used for the ink deposition, the ink-jet printing and the spray-coating technique. With the former one, the ink was at first tested on the poly (ethylene terephthalate) foil to find a suitable combination of ink formulation and print parameters. After that, the final ammonia gas sensors were fabricated by both deposition techniques and compared. The aspects of the ink preparation and alteration, as well as the active layer properties, are analyzed by means of UV-vis spectroscopy, optical microscopy, atomic force microscopy, profilometry and electrical measurements. The results obtained from each deposition technique are discussed. In both cases, the sensitivity to the ammonia gas has been demonstrated, making the proposed ink in combination with the two named deposition processes feasible for the potential large-area sensor production.

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