Direct Writing Target Structures by Two-Photon Polymerization
2016; Taylor & Francis; Volume: 70; Issue: 2 Linguagem: Inglês
10.13182/fst15-222
ISSN1943-7641
AutoresLijia Jiang, J.H. Campbell, Yongfeng Lu, T. Bernát, N. Petta,
Tópico(s)Diamond and Carbon-based Materials Research
ResumoTwo-photon polymerization (2PP) offers an attractive option for direct writing micron- to millimeter-sized laser target components that support high-energy-density plasma physics research. 2PP was used to deterministically print a number of common targetlike structures including tubes, spatially periodic Rayleigh-Taylor–like surfaces, and low-density foams. The structures were printed using commercially available acrylic photoresins. The elemental compositions are reported for comparison with other polymers used for making target components. A number of foamlike structures ranging in size from tens to hundreds of microns and varying in density from 600 to 60 mg/cm3 were readily printed in times ranging from several seconds to a few hours depending on the size. In addition, direct printing was demonstrated to fabricate graded-density foam comprising 12 individual layers with a vertical density gradient of 600 to 80 mg/cm3. Control of shrinkage and deformation during development and subsequent drying remains a challenge for certain structures and a focus of ongoing research.
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