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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Chemistry

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Patterning Black Phosphorus with Femtosecond Lasers

Context: There are many 2D materials with inherent non-linear optical properties. The interaction of high intensity lasers with such materials on a surface can switch on unique optical phenomena in the material. Such properties can in turn be exploited to make microstructures

The Role of Charged Droplets in Nanoparticle Formation

Context: This study explores the formation of sediments and minerals in nature by lookin at how charged droplets lead to changes in surface tension setting off forces that tear micro sized particles suspended in the droplet to for nanoparticles. This could explain

Unleashing Continuous Precision: Microtube Synthesis with Two-Photon Direct Writing

Context: Continuous fabrication of high-aspect-ratio structures with nano/microscopic features is desirable for many applications in medicine and photonics, including custom-designed stents, micro-surgery equipment, and optical components. Two-Photon Continuous Flow Lithography: This paper introduces a new adaptation of two-photon lithography known as two-photon

Microphases fabricated by Two-Photon Direct Writing

The advancements in maskless fabrication methods, specifically two-photon microfabrication, have ushered in a revolutionary era in materials science. These state-of-the-art techniques allow for the precise creation of custom-designed microscale phases and have the potential to become a game-changer in the field due

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Patterning Black Phosphorus with Femtosecond Lasers

Context: There are many 2D materials with inherent non-linear optical properties. The interaction of high intensity lasers with such materials on a surface can switch on unique optical phenomena in the material. Such properties can in turn be exploited to make microstructures suitable for devices in applications like electronics, photonics and catalysis. TL;DR: This study

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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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Videos

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.