title: Combined Optical and Chemical Control of a Microsized Photofueled Janus Particle.
abstract: A Au-silica Janus particle is elevated along the laser beam axis in an optical trap. The propulsion mechanism is based on the local temperature gradient created around the particle due to the photothermal conversion of the gold-coated hemisphere. The height of the particle and its motion-direction are tuned by the nature and the concentration of the electrolytes in the medium.
authors.affiliation: Photonics and Optoelectronics Group, Department of Physics and Center for Nanoscience, Ludwig-Maximilians-Universität, Amalienstr. 54, 80799, Munich, Germany.
authors.forename: Sabrina
authors.initials: S
authors.lastname: Simoncelli
authors.affiliation: Photonics and Optoelectronics Group, Department of Physics and Center for Nanoscience, Ludwig-Maximilians-Universität, Amalienstr. 54, 80799, Munich, Germany.
authors.forename: Johannes
authors.initials: J
authors.lastname: Summer
authors.affiliation: Photonics and Optoelectronics Group, Department of Physics and Center for Nanoscience, Ludwig-Maximilians-Universität, Amalienstr. 54, 80799, Munich, Germany.|Photonics and Optoelectronics Group, Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799, Munich, Germany.
authors.forename: Spas
authors.initials: S
authors.lastname: Nedev
authors.affiliation: Photonics and Optoelectronics Group, Department of Physics and Center for Nanoscience, Ludwig-Maximilians-Universität, Amalienstr. 54, 80799, Munich, Germany.|Photonics and Optoelectronics Group, Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799, Munich, Germany.
authors.forename: Paul
authors.initials: P
authors.lastname: Kühler
authors.affiliation: Photonics and Optoelectronics Group, Department of Physics and Center for Nanoscience, Ludwig-Maximilians-Universität, Amalienstr. 54, 80799, Munich, Germany.|Photonics and Optoelectronics Group, Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799, Munich, Germany.
authors.forename: Jochen
authors.initials: J
authors.lastname: Feldmann
keywords: Janus particles; electrolytes; elevation; optical traps; self-thermophoresis