Thermofluorescent Conjugated Polymer Sensors for Nano‐ and Microscale Temperature Monitoring

It is shown that due to the inherent irreversible non‐fluorescence to fluorescence transition feature of polydiacetylene (PDA) supramolecules that occurs in response to thermal perturbations, PDA vesicles embedded in a host polymer matrix function as nano/microscale temperature indicators. As a result, they are used to monitor temperature gradients on an integrated circuit chip and to uncover submicrometer size filamentary defects in a resistance random access memory (RRAM) device structure. This new methodology should find a wide applicability in carrying out temperature distribution analysis on semiconductor and micro‐electromechanical system (MEMS) devices where the detection of local heat deviations of small‐scale components is critical. magnified image