Chiara Daraio - Video Lecture

Chiara Daraio - Video Lecture

IVS-IPSTA 2020 Online Conference December 13, 2020

Soft and Biological Matter Session
Session chair:
Ulyana Shimanovich

Weizmann Institute of Science, Rehovot Israel


Organic temperature and IR sensors

Chiara Daraio

Division of Engineering and Applied Science, California Institute of Technology, USA


Abstract


Organic electronic materials, including conductive and semiconductive polymers, are emerging as competitive alternatives to conventional, silicon-based microelectronics, due to their low-cost manufacturing and wider range of functionalities, such as stretchability, degradability and self-healing. The ability to synthetically tailor properties of organic compounds at the molecular levels makes them particularly appealing for sensing applications in wearable and implantable devices, which benefit from materials that are biocompatible and flexible, features that are difficult to achieve with inorganic materials and siliconbased manufacturing. Organic temperature sensing layers, for example, have been realized exploiting the variation of the polymers’ electrical resistance with thermal expansion. Temperature sensing films offer exciting opportunities for wearable thermometer, environmental and industrial monitoring and for robotic surfaces to augment human-machine interactions. Our group demonstrated that pectin, a structurally and functionally complex, acid-rich polysaccharide found in plant cell walls, presents a record temperature response, linked to its ionic conductivity. In this talk, I will detail pectin’s temperature responsivity and I will describe the design and synthesis of a new synthetic polymer that mimics the structure of pectin and exhibits superior thermal sensitivity, while also being mechanically robust and flexible. With it, we realize temperature mapping systems and IR absorbing devices for consumer electronics.