Precise 3D printing of micro/nanostructures using highly conductive carbon nanotube-thiol-acrylate composites

Y. Liu, W. Xiong, L. J. Jiang, Y. S. Zhou, Y. F. Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Two-photon polymerization (TPP) is of increasing interest due to its unique combination of truly three-dimensional (3D) fabrication capability and ultrahigh spatial resolution of ∼40 nm. However, the stringent requirements of non-linear resins seriously limit the material functionality of 3D printing via TPP. Precise fabrication of 3D micro/nanostructures with multi-functionalities such as high electrical conductivity and mechanical strength is still a long-standing challenge. In this work, TPP fabrication of arbitrary 3D micro/nanostructures using multi-walled carbon nanotube (MWNT)-thiolacrylate (MTA) composite resins has been developed. Up to 0.2 wt% MWNTs have been incorporated into thiol-acrylate resins to form highly stable and uniform composite photoresists without obvious degradation for one week at room temperature. Various functional 3D micro/nanostructures including woodpiles, micro-coils, spiral-like photonic crystals, suspended micro-bridges, micro-gears and complex micro-cars have been successfully fabricated. The MTA composite resin offers significant enhancements in electrical conductivity and mechanical strength, and on the same time, preserving high optical transmittance and flexibility. Tightly controlled alignment of MWNTs and the strong anisotropy effect were confirmed. Microelectronic devices including capacitors and resistors made of the MTA composite polymer were demonstrated. The 3D micro/nanofabrication using the MTA composite resins enables the precise 3D printing of micro/nanostructures of high electrical conductivity and mechanical strength, which is expected to lead a wide range of device applications, including micro/nano-electromechanical systems (MEMS/NEMS), integrated photonics and 3D electronics.

Original languageEnglish (US)
Title of host publicationLaser 3D Manufacturing III
EditorsAlberto Pique, Bo Gu, Henry Helvajian
PublisherSPIE
ISBN (Electronic)9781628419733
DOIs
StatePublished - 2016
EventLaser 3D Manufacturing III - San Francisco, United States
Duration: Feb 15 2016Feb 18 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9738
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherLaser 3D Manufacturing III
CountryUnited States
CitySan Francisco
Period2/15/162/18/16

Keywords

  • 3D micro/nanofabrication
  • Aligned carbon nanotubes
  • Laser direct writing
  • Laser-directed assembly
  • Two-photon polymerization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Liu, Y., Xiong, W., Jiang, L. J., Zhou, Y. S., & Lu, Y. F. (2016). Precise 3D printing of micro/nanostructures using highly conductive carbon nanotube-thiol-acrylate composites. In A. Pique, B. Gu, & H. Helvajian (Eds.), Laser 3D Manufacturing III [973808] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9738). SPIE. https://doi.org/10.1117/12.2214862