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Laser jetting of femto-liter metal droplets for high resolution 3D printed structures.

ABSTRACT: Laser induced forward transfer (LIFT) is employed in a special, high accuracy jetting regime, by adequately matching the sub-nanosecond pulse duration to the metal donor layer thickness. Under such conditions, an effective solid nozzle is formed, providing stability and directionality to the femto-liter droplets which are printed from a large gap in excess of 400 ?m. We illustrate the wide applicability of this method by printing several 3D metal objects. First, very high aspect ratio (A/R > 20), micron scale, copper pillars in various configuration, upright and arbitrarily bent, then a micron scale 3D object composed of gold and copper. Such a digital printing method could serve the generation of complex, multi-material, micron-scale, 3D materials and novel structures.

SUBMITTER: Zenou M

PROVIDER: S-EPMC4658554 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

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Laser jetting of femto-liter metal droplets for high resolution 3D printed structures.

Zenou M M Sa'ar A A Kotler Z Z

Scientific reports 20151125

Laser induced forward transfer (LIFT) is employed in a special, high accuracy jetting regime, by adequately matching the sub-nanosecond pulse duration to the metal donor layer thickness. Under such conditions, an effective solid nozzle is formed, providing stability and directionality to the femto-liter droplets which are printed from a large gap in excess of 400 μm. We illustrate the wide applicability of this method by printing several 3D metal objects. First, very high aspect ratio (A/R > 20) ...[more]

PMID: 26602432

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