Secondary image 2 (IMAGE) Aalto University Caption The Aalto University research group's solution to the air-shearing force was to build pillars on the black silicon surface, which are then etched to have similarly textured caps. Credit Maja Vuckovac/Aalto University Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.