Innovative Technique for Printing on Glass Surfaces

A collaborative team from NIMS and the University of Connecticut has unveiled an innovative printing technique that allows for the creation of intricate periodic nano/microstructures on a polydimethylsiloxane (PDMS) slab, which can then be seamlessly transferred to a glass substrate. This breakthrough simplifies the fabrication process, opening up exciting possibilities for functional materials.

This novel method not only enables the development of materials with impressive properties such as water-repellency and the ability to produce vibrant structural colors, but it does so without relying on expensive machinery or complicated procedures. The technique holds significant potential for practical applications, including surfaces that resist fogging and advanced gas sensors.

The findings have been published in the journal Advanced Science, addressing a persistent challenge in the field of materials science. Traditional approaches to creating periodic nano/microstructures are often slow, costly, and not suitable for large-scale applications, making this development particularly timely.

While some existing printing technologies offer potential, the right inks for forming these structures and efficient refilling methods remain under exploration. This has created a demand for a straightforward and effective technique for producing periodic nano/microstructures.

The team's approach utilizes a PDMS slab that functions as an ink when liquid PDMS is exuded from its surface. This allows for the formation of unique wrinkled structures, which can be easily transferred to glass by pressing the slab against it and then lifting it away, leaving the intricate pattern behind.

In addition to the wrinkled designs, the researchers can create other exciting patterns, such as columnar and wavy structures. They can also incorporate various additives like silicone oils and silica nanoparticles into the liquid PDMS, enhancing the properties of the resulting nano/microstructures for diverse applications.

Looking ahead, the team aims to refine their printing technique to produce a wide range of periodic nano/microstructures that address pressing societal needs. These structures could lead to advancements in superhydrophobic and superoleophobic surfaces, as well as contribute to innovative solutions for atmospheric water harvesting.