Colloidal Photonic Crystal Strain Sensor Integrated with Deformable Graphene Phototransducer. (11th June 2019)

• Record Type: Journal Article
• Authors: Snapp, Peter; Kang, Pilgyu; Leem, Juyoung; Nam, SungWoo
• Is Part Of: Advanced functional materials. Volume 29:Number 33(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-06-11
• Subjects: colloidal photonic crystals -- colorimetric -- crumpling -- graphene -- strain; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201902216
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: 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 electrical transducers. This work details a colorimetric strain sensor with optoelectrical quantification based on an integrated system of CPCs over a crumpled graphene phototransducer, which optoelectrically quantifies CPCs, response to strain. The hybrid system enables direct visual perception of strain, while strain quantification via electrical measurement of the hybrid system outperforms that of crumpled graphene strain sensors by more than 100 times. The unique combination of a photonic sensing element with a deformable transducer will allow for the development of novel, electrically quantifiable colorimetric sensors with high sensitivity. Abstract : Colloidal photonic crystals (CPCs) can serve as strain sensors ; however, CPCs' response to strain is difficult to quantify without optical spectroscopy. This work details a colorimetric strain sensor with electrical quantification based on an integrated system of CPCs over a crumpled graphene phototransducer, which optoelectrically quantifies the CPCs' response to strain. The developed sensor simultaneously enables direct visual readout and 100x improved strain sensing over plain crumpled graphene strain sensors.