Improving spatial resolution of two-photon microfabrication by using photoinitiator with high initiating efficiency
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- 26 March 2007
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (13), 131106
- https://doi.org/10.1063/1.2717532
Abstract
The lateral spatial resolution (LSR) in two-photon induced polymerization was improved to 80 nm by using an anthracene derivative (9,10-bis-pentyloxy-2,7-bis[2-(4-dimethylamino-phenyl)-vinyl]anthracene (BPDPA)) as a highly sensitive and efficient photoinitiator. Photocurable resin containing 0.18 mol % BPDPA exhibited a low polymerization threshold of 0.64 mW at 800 nm . Theoretical calculations showed that the LSR can be increased by reducing the laser power, indicating that the LSR could be improved using more sensitive initiators in the future.Keywords
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