Candy-like mixture can print patterns on microscopic objects

Patterns of microscopic discs, rings or letters might be added to microrobots or stretchy electronics with a dissolved sugar combination

By Karmela Padavic-Callaghan

A sugar combination much like exhausting sweet studded with tiny steel discs or rings has been used to deposit patterns onto microscopic objects. This methodology of making texture on small objects might be helpful for biomedical robots or versatile electronics.

To give microscopic robots or small digital circuits extra performance, researchers usually embellish their surfaces with patterns of even tinier objects, equivalent to magnets. They usually make these parts on a flat, clear floor after which stamp them onto the larger object.

But precisely making use of them on this means turns into tough when the receiving objects should not easy, says Gary Zabow on the National Institute of Standards and Technology in Colorado. He labored out how you can use sugar and corn syrup so as to add micropatterns to even essentially the most irregular and jagged objects.

He first organized micron-sized discs and rings of silver or platinum right into a sample, equivalent to an array or a letter, after which poured a heat combination of sugar and corn syrup over it. Adding corn prevents the sugar from crystallising and disrupting the sample. The parts bought caught within the combination because it solidified into one thing much like exhausting sweet. Zabow then put this hardened combination on the item he wished to sample and re-heated it, so it unfold and wrapped across the object beneath it – like a Jolly Rancher exhausting sweet melting within the solar. Finally, he dissolved the sugar combination with water, and solely the parts that had been caught inside it remained on the item’s floor.

Zabow examined the strategy on objects starting from micron-sized steel cubes and glass beads to grains of pollen, particular person hairs and purple blood cells. He says that as a result of sugar isn’t poisonous, this methodology may probably be used for manufacturing microrobots and nanoparticles that enter the human physique in biomedicine.

Cunjiang Yu at Pennsylvania State University says that the strategy works higher than many current strategies for patterning very small objects. It might be a very good match for making versatile electronics that may be built-in into organic tissues or wearables, amongst many different functions, he says.

This sort of micropatterning continues to be in its infancy, and Zabow desires different researchers to strive it out. “I hope that other people will think of things that I haven’t yet thought to try. It seems to be fairly easy to experiment further – you just take a Jolly Rancher candy, and it works,” he says.

Journal reference: Science, DOI: 10.1126/science.add7023