may 2016 research highlight laser-assisted direct ink ... · berkeley lab ir laser top view laser...

Scientific Achievement Laser-assisted direct ink writing (L-DIW) is used to pattern highly conductive, ductile metallic interconnects, springs, and free-standing spiral architectures on flexible and rigid substrates. Significance and Impact A new printing method is introduced for one-step fabrication of conductive and ductile metal features in planar and complex 3D shapes that combines direct ink writing with “on-the-fly” laser annealing. Research Details – A new printhead was designed that integrates an 808 nm laser alongside an ink deposition nozzle – Heat transfer along printed silver wires is modeled as a function of printing speed, laser intensity and pulse duration to optimize the printing process – Our L-DIW approach enables patterning of concentrated silver inks in myriad form factors Laser-Assisted Direct Ink Writing of Metallic Architectures Work was performed at Harvard University M. Skylar-Scott, S. Gunasekaran and J.A. Lewis, “Laser-Assisted Direct Ink Writing of Planar and 3D Metallic Architectures”, PNAS (2016). [in press] May 2016 Research Highlight

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Page 1: May 2016 Research Highlight Laser-Assisted Direct Ink ... · BERKELEY LAB IR laser top view laser sintered silver Camera 3-D motion + pressure silver ink glass nozzle Compression

Scientific AchievementLaser-assisteddirectinkwriting(L-DIW)isusedtopatternhighlyconductive,ductilemetallicinterconnects, springs,andfree-standingspiralarchitecturesonflexibleandrigidsubstrates.

Significance and ImpactAnewprintingmethod isintroduced forone-stepfabricationofconductiveandductilemetalfeaturesinplanarandcomplex3Dshapesthatcombinesdirectinkwritingwith“on-the-fly”laserannealing. Research Details– Anewprinthead wasdesignedthat integratesan808nmlaseralongsideaninkdepositionnozzle

– Heattransferalongprintedsilverwiresismodeledasafunctionofprintingspeed, laserintensityandpulsedurationtooptimizetheprintingprocess

– OurL-DIWapproachenablespatterningofconcentratedsilverinksinmyriadformfactors

Laser-Assisted Direct Ink Writing of Metallic Architectures

WorkwasperformedatHarvardUniversity M.Skylar-Scott,S. GunasekaranandJ.A.Lewis,“Laser-AssistedDirectInkWritingofPlanarand3DMetallicArchitectures”,PNAS(2016).[inpress]

May 2016 Research Highlight

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