Journal
PROGRESS IN POLYMER SCIENCE
Volume 33, Issue 6, Pages 631-681Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.progpolymsci.2008.01.001
Keywords
two-photon initiated polymerization; two-photon chromophore; voxel; 3D microfabrication; stereolithography; additive layer-by-layer method
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Funding
- National Research Foundation of Korea [2005-02435, 과C6A1808, 핵06B1311, R15-2006-022-01001-0, R11-2007-050-01002-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In recent years considerable efforts have been put forth in two-photon initiated polymerization (TPP)-based two- and three-dimensional (2D and 3D) nano/microfabrication for the development of novel nano/microdevices. In less than two decades of research, TPP has been employed in the fabrication of a great number of diverse micro-objects through the use of a wide variety of effective two-photon absorbing chromophores. In TPP, when a near-infrared ultrashort-pulsed laser is closely focused into a volume of photocurable resins, real 3D microstructures can be fabricated using a layer-by-layer accumulating technique making it a promising technique for 3D nano/microfabrication. More recently, a spatial resolution of sub-100nm scale was achieved with TPP by employing a radical quenching mechanism. There also have been many studies that aimed at improving the fabrication efficiency and precision of TPP. Focus of ongoing research is the development of efficient two-photon absorbing chromophores. In this article, we discuss recent efforts in developing two-photon absorbing chromophores with focus on their structure property relationship and some recent outstanding attempts at improving the fabrication efficiency of 3D nano/microfabrications based on TPP. (C) 2008 Elsevier Ltd. All rights reserved.
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