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"Structural Color Rainbow" by Alexander Jessernig, ETH Zurich

Entry in category 1 Object of study; Copyright CC-BY-NC-ND: Alexander Jessernig

 

My project focuses on postsurgical diagnostics. And since we focus on electronic free naked eye detection it is of paramount importance to use bright and vivid colors. This allows the readout to be easily distinguishable from the environment. To do so we employ structural colors like the ones shown in this picture. They differ from regular colors by the mechanism in which the color is produced. Structural colors interact with light through a physical mechanism. In our case the structural coloring agent forms nanosized helices that reflect light through Bragg reflection. The light reflected is dependent on the scale of the nanostructure. In our case, the influx of water, as a result of disease driven material degradation, changes color as it pushes the structures further apart. With this a gradual shift from blue via green to red can be obtained that allows us to obtain information on the patients’ health and recovery status.

 

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Uploaded on March 28, 2024