Surfactant free fabrication of polyimide nanoparticles

J. Y. Xiong, X. Y. Liu*, S. B. Chen, T. S. Chung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Polyimide nanoparticles are fabricated using a combined liquid-liquid phase separation and solvent/ nonsolvent mixing technology. This technology allows us to produce stable polyimide nanoparticles with tunable size without any surfactants. Selective solvation and electron pair donor/electron pair acceptor interaction are employed to stabilize nanoparticles. The formation of polyimide nanoparticles is governed by a nucleation-dominated process and therefore the particle size is controlled by the nucleation rate. A very high level of supersaturation can be attained under the intensive local motions induced by ultrasound, resulting in a very high nucleation rate. This effect is found extremely useful in the fabrication of sub-50-nm polyimide nanoparticles.

Original languageEnglish (US)
Pages (from-to)5733-5735
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number23
DOIs
StatePublished - Dec 6 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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