X‐ray emissions during laser machining of cylindrical micro‐components

Laser Machining of Graphene

Since Geim and Novoselov’s successful production of high quality graphene, its unique properties have found a number of applications. But graphene is not an exotic chemical compound; instead, it is a sheet of graphite, one atom think. Before 2008, the only way to produce graphene was through successive pealing of graphite with scotch tape until graphite flakes as thin as 1 atomic layer were lef...

Spatter Tracking in Laser Machining

In laser drilling, an assist gas is often used to remove material from the drilling point. In order to design assist gas nozzles to minimize spatter formation, measurements of spatter trajectories are required. We apply computer vision methods to measure the 3D trajectories of spatter particles in a laser cutting event using a stereo camera configuration. We also propose a novel method for cali...

Directed self-assembly of microcomponents enabled by laser-activated bubble latching.

This article introduces a method for microscale assembly using laser-activated bubble latching. The technique combines the advantages of directed fluidic assembly and surface tension-driven latching to create arbitrarily complex and irregular structures with unique properties. The bubble latches, generated through the laser degradation of the tile material, are created on the fly, reversibly li...

Gas Jet–Workpiece Interactions in Laser Machining

Laser machining efficiency and quality are closely related to gas pressure, nozzle geometry, and standoff distance. Modeling studies of laser machining rarely incorporate gas effects in part because of the complex structure and turbulent nature of jet flow. In this paper, the interaction of a supersonic, turbulent axisymmetric jet with the workpiece is studied. Numerical simulations are carried...

Laser Drilling Assisted with Jet Electrochemical Machining