202 citations · 355 across the 13 of their papers we have counts for
13 papers
Rolling at right angles: magnetic anisotropy enables dual-anisotropic active matter
Eavan Fitzgerald, Cécile Clavaud, Debasish Das +2
We report on an experimental active matter system with motion restricted to four cardinal directions. Our particles are magnetite-doped colloidal spheres driven by the Quincke elec…
Using optical tweezers to simultaneously trap, charge and measure the charge of a microparticle in air
Andrea Stoellner, Isaac C. D. Lenton, Artem G. Volosniev +9
Optical tweezers are widely used as a highly sensitive tool to measure forces on micron-scale particles. One such application is the measurement of the electric charge of a particl…
Geometry of the vapor layer under a Leidenfrost hydrogel sphere
Vicente L. Diaz-Melian, Isaac C. D. Lenton, Jack Binysh +2
A floating Leidenfrost droplet exhibits curvature inversion of its underside, due to the balance of vapor pressure and surface tension. Using interferometric imaging, we find diffe…
A duality between surface charge and work function in scanning Kelvin probe microscopy
Isaac C. D. Lenton, Felix Pertl, Lubuna Shafeek +1
Scanning Kelvin probe microscopy (SKPM) is a powerful technique for macroscopic imaging of the electrostatic potential above a surface. Though most often used to image work-functio…
No time for surface charge: how bulk conductivity hides charge patterns from KPFM in contact-electrified surfaces
Felix Pertl, Isaac C. D. Lenton, Tobias Cramer +1
Kelvin probe force microscopy (KPFM) is a powerful tool for studying contact electrification, using an tiny tip to image voltages caused by transferred charge. It has been used in…
Beyond the blur: using experimentally determined point spread functions to improve scanning Kelvin probe imaging
Isaac C. D. Lenton, Felix Pertl, Lubuna Shafeek +1
Scanning Kelvin probe microscopy (SKPM) is a powerful technique for investigating the electrostatic properties of material surfaces, enabling the imaging of variations in work func…
Roadmap on Deep Learning for Microscopy
Giovanni Volpe, Carolina Wählby, Lei Tian +72
Through digital imaging, microscopy has evolved from primarily being a means for visual observation of life at the micro- and nano-scale, to a quantitative tool with ever-increasin…
Machine learning reveals complex behaviours in optically trapped particles
Isaac C. D. Lenton, Giovanni Volpe, Alexander B. Stilgoe +2
Since their invention in the 1980s [1], optical tweezers have found a wide range of applications, from biophotonics and mechanobiology to microscopy and optomechanics [2, 3, 4, 5].…
OTSLM Toolbox for Structured Light Methods
Isaac C D Lenton, Alexander B Stilgoe, Timo A Nieminen +1
We present a new Matlab toolbox for generating phase and amplitude patterns for digital micro-mirror device (DMD) and liquid crystal (LC) based spatial light modulators (SLMs). Thi…
Orientation of Swimming Cells with Annular Beam Optical Tweezers
Isaac C. D. Lenton, Declan J. Armstrong, Alexander B. Stilgoe +2
Optical tweezers are a versatile tool that can be used to manipulate small particles including both motile and non-motile bacteria and cells. The orientation of a non-spherical par…
Theory and practice of simulation of optical tweezers
Ann A. M. Bui, Alexander B. Stilgoe, Isaac C. D. Lenton +5
Computational modelling has made many useful contributions to the field of optical tweezers. One aspect in which it can be applied is the simulation of the dynamics of particles in…
Visual guide to optical tweezers
Isaac C. D. Lenton, Alexander B. Stilgoe, Halina Rubinsztein-Dunlop +1
It is common to introduce optical tweezers using either geometric optics for large particles or the Rayleigh approximation for very small particles. These approaches are successful…
Direct imaging of a digital-micromirror device for configurable microscopic optical potentials
G. Gauthier, I. Lenton, N. McKay Parry +4
Programable spatial light modulators (SLMs) have significantly advanced the configurable optical trapping of particles. Typically, these devices are utilized in the Fourier plane o…