期刊
APPLIED PHYSICS LETTERS
卷 95, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3213351
关键词
electroluminescent devices; isomerisation; nanofabrication; nanophotonics; nanostructured materials; optoelectronic devices; photochemistry; polymerisation; polymers; solubility; two-photon processes
资金
- Natural Science Foundation, China (NSFC) [60525412, 60677018, 20834006]
In this letter, laser micronanofabrication via two-photon absorption initiated isomerization was proposed and explored. Experimentally a cis-form rich poly[2,5-dihexyloxy-1,4-phenylene] vinylene)-alt-(2,5-diphenyl-1,4-phenylene vinylene)] (DPO-PPV) was used as the precursory material, which underwent pinpoint molecular conformational change upon the near-infrared femtosecond laser irradiation. Due to pronouncedly reduced solubility of trans-configuration molecules, the precipitate at the tiny volumes was implemented as voxels to construct two- and three-dimensional micronanostructures. This mechanism may provide an alternative enabling tool other than two-photon absorption initiated polymerization of resins for designable micronanofabrication of photonic or optoelectronic devices including organic electroluminescent devices, particularly those based on PPV and its derivatives.
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