Untethered unidirectionally crawling gels driven by an asymmetry in contact forces

A. Pantula, B. Datta, Y. Shi, M. Wang, J. Liu, S. Deng, N. Cowan, T. Nguyen, D.H. Gracias, chemRxiv 2022; D01:10.26434/chemrxiv-2022-7j4pd