Electrophoretic deposition of single wall carbon nanotube films and characterization

Junyoung Lim, Maryam Jalali, Stephen A. Campbell

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

2 Scopus citations


Electrophoretic deposition enables the rapid deposition of single wall carbon nanotube films at room temperature. An accurate, reproducible film thickness can be obtained by controlling electric field strength, suspension concentration, and time. To investigate the electrical and mechanical properties of such films, we recorded electric resistance and Young's modulus using I-V characterization and a nanoindenter, respectively. The measured resistivity of the films varied from 2.14 × 10-3 to 7.66 × 10-3 Ω-cm, and the Young's modulus was 4.72 to 5.67 GPa, independent of film thickness from 77 to 134 nm. These results indicated that the mechanical and electrical properties of film are comparable with previously reported methods such as layer by layer deposition even though we achieved much higher deposition rates. We also measured the film mass density which is usually unrecorded even though it is an important parameter for MEMS/NEMS device actuation. The film density was found with conventional thickness measurement and Rutherford backscattering spectrometry. It varied from 0.12 to 0.54 g/cm3 as the film thickness increased. This method could be extended to applications of CNT films for flexible electronics or high frequency RF MEMS devices.

Original languageEnglish (US)
Title of host publicationCarbon Nanotubes - Synthesis, Properties, Functionalization, and Applications
EditorsPaulo T. Araujo, Aaron Franklin, Yoong Ahm Kim, Michael Krueger
PublisherMaterials Research Society
Number of pages5
ISBN (Electronic)9781605117294
StatePublished - 2015
Event2014 MRS Fall Meeting - Boston, United States
Duration: Nov 30 2014Dec 5 2014

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2014 MRS Fall Meeting
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2014 Materials Research Society.


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