Determination of the elastic modulus of poly(ethylene oxide) using a photoisomerizing dye

作者：Jee Ah Young; Lee Hyemin; Lee Youmin; Lee Minyung^*

来源：Chemical Physics, 2013, 422: 246-250.

DOI：10.1016/j.chemphys.2012.12.028

• Poly(ethylene oxide)
• Elastic modulus
• Rigidity probe
• Fluorescence
• Isomerization

We have newly explored a correlation curve between the fluorescence lifetime of an isomerizable dye (4-DASPI) and the Young%26apos;s modulus of polymer matrices in which the dye were embedded. Then, the Young%26apos;s modulus of poly(ethylene oxide) and its nanocomposites were calculated from the measured fluorescence lifetime of the probe through a formula that represents the modulus-lifetime relationship. Our approach opens a viable way with which the mechanical properties of soft materials, polymers, multilayer films, and cells can be obtained using various fluorescence probes, as long as a light-induced molecular motion lies in the modulus or elasticity controlled regime.

• 出版日期2013-8-30