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Flexible, architectured, photonic nanostructures such as colloidal photonic crystals (CPCs) can serve as colorimetric strain sensors, where external applied strain leads to a noticeable color change. However, CPCs' response to strain is difficult to quantify without the use of optical spectroscopy. Integration of flexible electrical readout of CPCs' color change is a challenge due to a lack of flexible/stretchable...
In article number 1902216, SungWoo Nam and co‐workers report a colorimetric strain sensor with electrical quantification based on an integrated system of colloidal photonic crystals and a crumpled graphene photo‐transducer. The developed sensor enables direct visual readout and a 100‐fold improved strain sensing over plain crumpled graphene strain sensors in applications including body motion monitoring...
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