Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 237, Issue -, Pages 1095-1101Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.05.147
Keywords
Oxygen; Chemical imaging; Nanoparticles; Photosynthesis; Corals
Funding
- Villum Foundation
- Danish Research Council for Independent Research \ Natural Sciences
- Danish Research Council for Independent Research \ Technical and Production Sciences
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We describe a new method for imaging O-2 dynamics on heterogeneous biotic and abiotic surfaces using optical nanosensors. The method can overcome limitations of commonly used optodes or microsensors. To show the potential of the method, the O-2 dynamics on the surface of living corals were studied. Small coral fragments were spray-painted with O-2 sensor nanoparticles using a conventional airbrush and O-2 imaging was done with a simple SLR camera setup. Good coverage of the coral surface was achieved without significantly compromising the coral wellbeing as shown by measuring photosynthetic activity of the photosymbionts at different light levels. The method enabled analysis of spatial heterogeneities in O-2 concentration over the coral surface linked to different tissue types. Oxygenic photosynthesis and O-2 consumption could be followed at a temporal resolution of <10 s. (C) 2016 Elsevier B.V. All rights reserved. vertical bar
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