Determining intrinsic potentials and validating optical binding forces between colloidal particles using optical tweezers.

ABSTRACT: Understanding the interactions between small, submicrometer-sized colloidal particles is crucial for numerous scientific disciplines and technological applications. In this study, we employ optical tweezers as a powerful tool to investigate these interactions. We utilize a full image reconstruction technique to achieve high precision in characterizing particle pairs that enable nanometer-scale measurement of their positions. This approach captures intricate details and provides a comprehensive understanding of the spatial arrangement between particles, overcoming previous limitations in resolution. Moreover, our research demonstrates that properly accounting for optical binding forces to determine the intrinsic interaction potential is vital. We employ a discrete dipole approximation appro

SUBMITTER: Zhang C 

PROVIDER: S-EPMC11258337 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature