Phys. Rev. B 77, 205421 (2008) [8 pages]


Two-Photon Polymerization of Polydiacetylene

Olga Shusterman, Amir Berman, Yuval Golan, Baruch Horovitz and Leila Zeiri
Department of Physics, Department of Biotechnology Engineering, Ilse Katz Institute for Nanoscience and Nanotechnology, Department of Materials Engineering, and Department of Chemistry, Ben Gurion University of the Negev, Beer-Sheva 84105, Israel
J. Phys. Chem. B, 2009, 113 (5), pp 1273–1276
DOI: 10.1021/jp806546u
Publication Date (Web): January 8, 2009

Abstract

We show that visible light can polymerize diacetylene monomers into polydiacetylene (PDA) in a two-photon process. We monitor the process by measuring Raman intensities of PDA using a Raman laser at 633 nm with variable intensity I and show that the Raman cross section at short times increases as I3, corresponding to a two-photon process. The process generates a relatively stable blue phase PDA, in contrast with UV polymerization that leads to a fast blue to red phase transformation.

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