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ACS Nano. 2016 Sep 27;10(9):8879-87. doi: 10.1021/acsnano.6b04771. Epub 2016 Aug 30.

Three-Dimensional Printing of Highly Conductive Carbon Nanotube Microarchitectures with Fluid Ink.

Author information

1
Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI) , Changwon-si, Gyeongsangnam-do 51543, Republic of Korea.
2
Department of Electronics and Computer Engineering, Hanyang University , Seoul 133-791, Republic of Korea.
3
Electrical Functional Material Engineering, Korea University of Science and Technology (UST) , Changwon-si, Gyeongsangnam-do 51543, Republic of Korea.
4
Department of Electronic Engineering, Yeungnam University , 280 Daehak-ro, Gyeongsan-si, Gyeongsangbuk-do 38541, Republic of Korea.
5
Department of Mechanical Engineering, The University of Hong Kong , Pokfulam Road, Hong Kong, China.

Abstract

Moving printed electronics to three dimensions essentially requires advanced additive manufacturing techniques yielding multifunctionality materials and high spatial resolution. Here, we report the meniscus-guided 3D printing of highly conductive multiwall carbon nanotube (MWNT) microarchitectures that exploit rapid solidification of a fluid ink meniscus formed by pulling a micronozzle. To achieve high-quality printing with continuous ink flow through a confined nozzle geometry, that is, without agglomeration and nozzle clogging, we design a polyvinylpyrrolidone-wrapped MWNT ink with uniform dispersion and appropriate rheological properties. The developed technique can produce various desired 3D microstructures, with a high MWNT concentration of up to 75 wt % being obtained via post-thermal treatment. Successful demonstrations of electronic components such as sensing transducers, emitters, and radio frequency inductors are also described herein. We expect that the technique presented in this study will facilitate selection of diverse materials in 3D printing and enhance the freedom of integration for advanced conceptual devices.

KEYWORDS:

3D printing; 3D-printed electronics; CNT microarchitecture; fluid ink; meniscus-guided printing

PMID:
27564233
DOI:
10.1021/acsnano.6b04771

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