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Machine Learning Enabled Image Analysis of Time‐Temperature Sensing Colloidal Arrays
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Machine Learning Enabled Image Analysis of Time‐Temperature Sensing Colloidal Arrays
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Journal Article
Machine Learning Enabled Image Analysis of Time‐Temperature Sensing Colloidal Arrays
2023
Overview
Smart, responsive materials are required in various advanced applications ranging from anti‐counterfeiting to autonomous sensing. Colloidal crystals are a versatile material class for optically based sensing applications owing to their photonic stopband. A careful combination of materials synthesis and colloidal mesostructure rendered such systems helpful in responding to stimuli such as gases, humidity, or temperature. Here, an approach is demonstrated to simultaneously and independently measure the time and temperature solely based on the inherent material properties of complex colloidal crystal mixtures. An array of colloidal crystals, each featuring unique film formation kinetics, is fabricated. Combined with machine learning‐enabled image analysis, the colloidal crystal arrays can autonomously record isothermal heating events — readout proceeds by acquiring photographs of the applied sensor using a standard smartphone camera. The concept shows how the progressing use of machine learning in materials science has the potential to allow non‐classical forms of data acquisition and evaluation. This can provide novel insights into multiparameter systems and simplify applications of novel materials. The optical response of multicomponent photonic crystals contains intricate information regarding a sample's thermal history. In this work, a reproducible sensor fabrication method coupled with fast data acquisition via digital photography is presented. Machine learning assisted evaluation allows smartphone‐based sensing of thermal events. Time and temperature can thereby be obtained independently and without specialized equipment.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
