Two-photon polymerization of polydiacetylene.
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.
Shusterman
Olga
O
Department of Physics, Ilse Katz Institute for Nanoscience and Nanotechnology, Ben Gurion University of the Negev, Beer-Sheva 84105, Israel.
Berman
Amir
A
Golan
Yuval
Y
Horovitz
Baruch
B
Zeiri
Leila
L
D003116:Color; D055668:Photochemical Processes; D017785:Photons; D000078789:Polyacetylene Polymer; D011108:Polymers / Q000737:chemistry*; D053279:Polyynes / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
D000078789:Polyacetylene Polymer; D011108:Polymers; D053279:Polyynes; C082361:polydiacetylene