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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster Session I

CPP 17.16: Poster

Monday, March 27, 2023, 18:00–20:00, P3

Humidity Stable Thermoelectric Hybrid Materials for A Self-Powered Sensing System — •Suo Tu¹, Ting Tian¹, Tianxiao Xiao¹, Shanshan Yin¹, Julian Heger¹, Guangjiu Pan¹, Shujin Hou², Aliaksandr Bandarenka², Matthias Schwartzkopf³, Stephan Roth³, and Peter Müller-Buschbaum^1,4 — ¹Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, 85748 Garching — ²Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Physik der Energiewandlung und -speicherung, 85748 Garching — ³DESY, 22607 Hamburg — ⁴MLZ, TUM, 85748 Garching

Highly sensitive and humidity-resistive detection of the most common physical stimuli is of primary importance for practical application in a real-time monitoring. Here, we report a simple yet effective strategy to achieve a highly humidity-stable hybrid composite that enables simultaneous and accurate pressure and temperature sensing in a single sensor. The improved electronic performance was due to the enhanced planarity of PEDOT and charge transfer between PEDOT:PSS and multi-walled carbon nanotubes (MWCNT) by strong π-π interaction. The preferred electronic pathway induced by robust morphology in the hybrid composite is responsible for the high humidity stability. These observations have been recognized by Grazing-incidence wide/small-angle X-ray scattering (GIWAXS/GISAXS), Raman, FTIR, and electrochemical impedance spectroscopy (EIS).