Combining Two-Photon Polymerisation and Photoreduction to Enable the Manufacture of Metamaterials at the Nanosale
Technical Report,15 Jan 2014,14 Jul 2015
University of Nottingham Nottingham NG72RD United Kingdom United States
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In this project, we investigated the feasibility of a new method of manufacturing metamaterials by combining two-photon polymerisation 2PP and photo reduction. A new rig has been built for this purpose. The polymerisation of four materials, OrmoComp, SU8, IPL and PEGDA, based on different polymerisation mechanisms, has each been investigated. Au salt photo reduction has been demonstrated. Polymer-metal hybrid two-photon processing has been tested by mixing each of the four polymers with Au salt. The formulations for simultaneous polymerisation and reduction have been optimised, and methods for controlling each process independently have been explored. The use of a 532 nm laser in addition to the near IR laser for two photon absorption, has afforded control over the degree of polymerisation and reduction evident during fabrication.