Journal
FRONTIERS IN CHEMISTRY
Volume 4, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2016.00017
Keywords
digital holographic microscopy; interferometric microscopy; quantitative phase imaging; bacterial tracking; bacterial motility; green fluorescent proteins; Mach-Zehnder
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Funding
- Gordon and Betty Moore Foundation (GBMF) [4037, 4038]
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Digital holographic microscopy (DHM) is an emerging imaging technique that permits instantaneous capture of a relatively large sample volume. However, large volumes usually come at the expense of lower spatial resolution, and the technique has rarely been used with prokaryotic cells due to their small size and low contrast. In this paper we demonstrate the use of a Mach-Zehnder dual-beam instrument for imaging of labeled and unlabeled bacteria and microalgae. Spatial resolution of 0.3 mu m is achieved, providing a sampling of several pixels across a typical prokaryotic cell. Both cellular motility and morphology are readily recorded. The use of dyes provides both amplitude and phase contrast improvement and is of use to identify cells in dense samples.
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