TY - RPRT TI - Programmable topotaxis of magnetic rollers in time-varying fields AU - Dou, Yong AU - Tzelios, Peter M. AU - Livitz, Dimitri AU - Bishop, Kyle J. M. PY - 2020 DO - 10.1039/d0sm01443e UR - https://www.osti.gov/biblio/1850629 ID - 1850629 ER -