세미나 Prof. Joshua M. Grolm [The Technion-Israel Institute of Technology] - Everyday mechanophores: measuring molecular-level strain from polymers to metals
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일시: 2025년 10월 2일 (목) 오후 5시
장소: 과학관 B131호
초록 :
Mechanochemical transduction has been a dream of biomimicry for many years in themaking. Where natural systems have evolved adept mechanisms to convert mechanical forcein a diverse range of materials into biological readouts, our synthetic efforts have fallen short.On this front, fundamental studies on molecular-level force effects, and applications such asdetecting material damage, drug delivery, and even self-healing plastics, all have benefitedfrom using such molecules exhibiting chemical and detectable changes as a function of applied force. And yet, there is such a large appeal for molecular sensors and nanomechanical measurements that can be used to probe network structure and architecture. In this presentation, we will explore how Dip Conjugation mechanophores can be used ashighly sensitive molecular strain sensors in a wide variety of materials. This technique can be applied to epoxy coatings, through synthesizing a novel spiropyran derivative hardener, and we show that damage in aluminum can be reported far before traditional methods of damagedetection, even rivaling electron microscopy. By demonstrating activation in syntheticpolymers, carbohydrates, proteins, and even metals under mechanical strain, the ubiquity of the technique enables adaptability as a general characterization technique.