An Introduction to Direct Laser Writing (DLW)

1. What is Two-Photon Direct Laser Writing (DLW)? Two-photon direct laser writing (DLW) is 3D printing for the microscopic world. This techniques goes beyond the smallest shapes and sizes that can be accomplished by garden variety 3D printing. The highest  resolution that can be achieved by DLW is typically few micron to sub-micron range. To

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Muscled Microstructures

Researcher’s led by Prof. Hongbo Sun at Tsinhua university, Beijing has put the protein bovine serum albumin (BSA) to use as a muscle in microstructures. Microstructures fabricated by two-photon laser direct writing constituted two different polymers. Major part of the strutcure was

Multimaterial 3D Laser Microprinting

This post deals with the a new method for mulimaterials two-photon lithography from the paper entitled “Multimaterial 3D laser microprinting using an integrated microfluidic system” published in Science Advances[1] . Facile integration of multiple photoresists into a multilayer, multimaterial structure has been accomplished

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Commercial Direct Laser Writing (DLW) Machines

Commercial direct laser writing systems are relatively new with the first firms offering such products emerging around 2007. The following is a short list of companies offering such products. There are broadly two categories of systems based on lasers sources used in

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Muscled Microstructures

Researcher’s led by Prof. Hongbo Sun at Tsinhua university, Beijing has put the protein bovine serum albumin (BSA) to use as a muscle in microstructures. Microstructures fabricated by two-photon laser direct writing constituted two different polymers. Major part of the strutcure was constructed from the epoxy bisphenol-A based photoresist SU8. Additional features of photo-crosslinked BSA

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Muscled Microstructures

Researcher’s led by Prof. Hongbo Sun at Tsinhua university, Beijing has put the protein bovine serum albumin (BSA) to use as a

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A Castle on a Pencil Lead

This video demonstration of two-photon lithography (laser direct writing) shows the fabrication of a microscopic castle on top a pencil lead. It

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A Castle on a Pencil Lead

This video demonstration of two-photon lithography (laser direct writing) shows the fabrication of a microscopic castle on top a pencil lead. It

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How Small can we 3D Print?

Current techniques provide 3D printing of structures as small as few nanometers.