A scanning electron microscope image shows a cell-size robotic swimmer that can be powered and steered by ultrasound waves. Credit: Cornell University Some engineers find inspiration in the mechanics of bird flight and the architecture of bee nests. Others think much smaller. A team
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This microneedle patch could someday replace a needle for delivering COVID-19 vaccines. Credit: Adapted from ACS Nano 2021 More than 2 billion people worldwide are fully vaccinated against COVID-19. However, many who live in resource-limited countries haven’t been able to get vaccines, partly because these areas lack temperature-controlled shipping and storage facilities. Now, researchers reporting
Illustration shows how a nanomaterial links with receptors on the immune system’s
A moiré sample and a metal sheet separated by a distance from
