Particle tracking is a fundamental technique for investigating a variety of biophysical
processes, from intracellular dynamics to the characterization of cell motility and migration …

Single-molecule force spectroscopy has emerged as a powerful tool to investigate the forces
and motions associated with biological molecules and enzymatic activity. The most common …

Abstract Characterization of the size and material properties of particles in liquid
suspensions is in very high demand, for example, in the analysis of colloidal samples or of …

Video microscopy has a long history of providing insight and breakthroughs for a broad
range of disciplines, from physics to biology. Image analysis to extract quantitative …

The quantification of three-dimensional (3D) flow structures and particle dynamics is crucial
for unveiling complex interactions in turbulent flows. This review summarizes recent …

Young's law predicts that a colloidal sphere in equilibrium with a liquid interface will straddle
the two fluids, its height above the interface defined by an equilibrium contact angle. This …

An in-line holographic microscope is an optical microscope outfitted with a coherent light
source, such as a laser. Light scattered by the specimen interferes with the transmitted …

We experimentally demonstrate a class of tractor beams created by coherently superposing
coaxial Bessel beams. These optical conveyors have periodic intensity variations along their …

During the last decade, optical tweezers have been transformed by the combined availability
of spatial light modulators and the speed of low-cost computing to drive them. Holographic …

Hard-sphere colloids are popular as models for testing fundamental theories in condensed
matter and statistical physics, from crystal nucleation to the glass transition. A single …