Two-photon polymerization: Investigation of chemical and mechanical properties of resins using Raman microspectroscopy

Li Jia Jiang, Yun Shen Zhou, Xiong Wei, Gao Yang, Huang Xi, Jiang Lan, Tommaso Baldacchini, Jean Francois Silvain, Yong Feng Lu

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

In this study, the degree of conversion (DC) of an acrylic-based resin (IP-L 780) in two-photon polymerization (TPP) is systematically investigated via Raman microspectroscopy. A quantitative relationship between TPP laser parameters and the DC of the resin is established. Nonlinear increase in DC with increased laser average power is observed. The resin DC is more sensitive to the laser average power than the laser writing speed. Nanoindentation was employed to correlate the results obtained from Raman microspectroscopy with the mechanical properties of microstructures fabricated by TPP. At constant writing speeds, microstructures fabricated with high laser average powers possess high hardness and high reduced Young's modulus (RYM), indicating high DCs. The results are in line with high DCs measured under the same TPP parameters in Raman microspectroscopy. Raman microspectroscopy is proved to be an effective, rapid, and nondestructive method characterizing microstructures fabrication by TPP.

Original languageEnglish (US)
Pages (from-to)3034-3037
Number of pages4
JournalOptics Letters
Volume39
Issue number10
DOIs
StatePublished - May 15 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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