Single-Crystal Rutile TiO<sub>2</sub> Nanocylinders are Highly Effective Transducers of Optical Force and Torque Seungkyu Ha Ying Tang Maarten M. van Oene Richard Janissen Roland M. Dries Belen Solano Aurèle J. L. Adam Nynke H. Dekker 10.1021/acsphotonics.9b00220.s001 https://acs.figshare.com/articles/journal_contribution/Single-Crystal_Rutile_TiO_sub_2_sub_Nanocylinders_are_Highly_Effective_Transducers_of_Optical_Force_and_Torque/8023604 Optical trapping of (sub)­micron-sized particles is broadly employed in nanoscience and engineering. The materials commonly employed for these particles, however, have physical properties that limit the transfer of linear or angular momentum (or both). This reduces the magnitude of forces and torques, and the spatiotemporal resolution, achievable in linear and angular traps. Here, we overcome these limitations through the use of single-crystal rutile TiO<sub>2</sub>, which has an exceptionally large optical birefringence, a high index of refraction, good chemical stability, and is amenable to geometric control at the nanoscale. We show that rutile TiO<sub>2</sub> nanocylinders form powerful joint force and torque transducers in aqueous environments by using only moderate laser powers to apply nN·nm torques at kHz rotational frequencies to tightly trapped particles. In doing so, we demonstrate how rutile TiO<sub>2</sub> nanocylinders outperform other materials and offer unprecedented opportunities to expand the control of optical force and torque at the nanoscale. 2019-04-22 00:00:00 laser powers rutile TiO 2 nanocylinders rutile TiO 2 nanocylinders form Torque Optical Effective Transducers nanoscale spatiotemporal resolution single-crystal rutile TiO 2 material Single-Crystal Rutile TiO 2 Nanocylinders torque transducers Optical Force chemical stability