Abstract
The paper describes application of diamond nano crystals to research on dynamic processes in small (less than 1 mm across) evaporating droplets deposited on a solid substrate. Such droplets are used as a model system for testing proposed bio applications of nitrogen-vacancy centers in diamond. We demonstrate that a high spatial resolution of our methods reveals unexpected features of the evaporation and fluid mechanics in such droplets.
Highlights
Research on nitrogen-vacancy centers in diamond (NV-centers) has gained its momentum about 30 years ago and since the field has developed in several directions
In this report we demonstrate applications of nano-diamonds for investigation of fluid dynamics in small evaporating droplets deposited on a solid surface. This system is interesting by itself and provides a simple playground for developing and testing concepts employed in corresponding intracellular applications
A very popular physical model for the evaporating droplet has been suggested 20 years ago in a seminal paper [2] and it predicts that the velocity of the fluid in the evaporating droplet deposited on a solid substrate increases towards the rim of the droplet
Summary
Research on nitrogen-vacancy centers in diamond (NV-centers) has gained its momentum about 30 years ago and since the field has developed in several directions. In this report we demonstrate applications of nano-diamonds for investigation of fluid dynamics in small evaporating droplets deposited on a solid surface. This system (where physics is not yet completely described with quantitative models) is interesting by itself and provides a simple playground for developing and testing concepts employed in corresponding intracellular applications.
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