Dual-scale structures enabled selective liquid directional steering (IMAGE) International Journal of Extreme Manufacturing Caption Liquid spread along different directions on ratchets with identical macroscopic morphology but distinct microgrooves that are arranged perpendicular and parallel to the ratchet-tilting direction, respectively. Credit By Jing Sun, Xuezhi Qin, Yuxin Song, Zhenyu Xu, Chao Zhang, Wei Wang, Zhaokun Wang, Bin Wang and Zuankai Wang. Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.