High dynamic range cationic two-photon photopolymerization

Y. Boiko, J. M. Costa, M. Wang, Sadik Esener

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cationic-induced two-photon photopolymerization is demonstrated at 710 nm, using an isopropylthioxanthone / diarylidonium salt initiating system for the cationic polymerization of an epoxide. The polymerization threshold J2th is found to be approximately 1 GW/cm2, with a dynamic range of > 100, i.e. the material can be fully polymerized at intensities > 100 times the threshold level without damage. The polymerization rate R is found to be proportional to the m=1.7 power of the intensity, or R = [C (J-J2th)]m = [C (J-J2th)]1.7, which implies a significantly stronger localization the photochemical response than that of free radical photoinitiators. R and J2th significantly improve when the concentration z of the initiator (onium salt) increases.

Original languageEnglish (US)
Pages (from-to)212-220
Number of pages9
JournalUnknown Journal
Volume4279
DOIs
StatePublished - 2001
Externally publishedYes

Fingerprint

Photopolymerization
Photons
Polymerization
dynamic range
polymerization
Salts
Cationic polymerization
photons
Free radicals
salts
thresholds
epoxy compounds
Epoxy Compounds
initiators
free radicals
Free Radicals
damage

Keywords

  • Cationic
  • Free radical
  • Microfabrication
  • Photopolymerization
  • Threshold
  • Two-photon absorption

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

High dynamic range cationic two-photon photopolymerization. / Boiko, Y.; Costa, J. M.; Wang, M.; Esener, Sadik.

In: Unknown Journal, Vol. 4279, 2001, p. 212-220.

Research output: Contribution to journalArticle

Boiko, Y. ; Costa, J. M. ; Wang, M. ; Esener, Sadik. / High dynamic range cationic two-photon photopolymerization. In: Unknown Journal. 2001 ; Vol. 4279. pp. 212-220.
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