Speckle tweezers near water-oil and water-air interfaces.

ABSTRACT: Contemporary approaches for multiple optical micro-manipulation typically involve careful pre-engineering of the laser beam shape. In various biomedical and microfluidic scenarios, especially those necessitating unconventional specimen chambers, there is a demand for controlling the collection of micro-objects near fluid-fluid interfaces. For many of these cases, a regular array of trap sites as well as tight confinement are not essential. For such applications near interfaces, we expand on the concept of speckle tweezers (ST), which incorporate randomly distributed light fields for quasi-2D optical manipulation. The proposed technique is demonstrated experimentally by applying ST to govern the movement of polystyrene micro-particles near water-oil and water-air interfaces. The efficacy of

SUBMITTER: Jamali R 

PROVIDER: S-EPMC12904559 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature