Work

Characterization of Microstructures Fabricated by Two-Photon Polymerization Using Coherent Anti-Stokes Raman Scattering Microscopy

Year: 2009

Type: article

Abstract: We demonstrate the possibility to image microstructures fabricated by two-photon polymerization (TPP) using coherent anti-Stokes Raman scattering (CARS) microscopy. The imaging contrast based on chemical selectivity attained by CARS microscopy is used to gather qualitative information on TPP. Upon the basis of detailed knowledge of the characteristic signatures of the photoresist Raman spectrum, quantitative relationships between laser writing conditions and polymer cross-linking are demonstrated. The increase in degree of polymer conversion as a function of laser average power follows a sigmoidal profile which is interpreted in terms of a simple model based on the polymerization mechanism of the photoresist.

Source: The Journal of Physical Chemistry B

DOI: 10.1021/jp9058998

Authors: Tommaso Baldacchini, Maxwell Zimmerley, Chun-Hung Kuo, Eric O. Potma, Ruben Zadoyan

Institutions: University of California, Irvine, Newport (United States)

Language: English

Topic: Spectroscopy Techniques in Biomedical and Chemical Research

Subfield: Biophysics

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: green

Funders: National Institute of Biomedical Imaging and Bioengineering, National Center for Research Resources

Awards: A Laser Microbeam Biotechnology Resource, A Laser Microbeam Biotechnology Resource