[20a-E208-1~11] 3.12 Nanoscale optical science and near-field optics

△ [20a-E208-3] Nanoscale infrared-spectroscopy for orientation of higher-order structure in polyhydroxybutyrate spherulites using near-field optical microscope

〇(M1)Takuya Yoshida¹, Takuya Okamoto¹, Meguya Ryu², Junko Morikawa², Yukio Kawano¹ (1.FIRST Tokyo Tech, 2.Materials Science & Eng. Tokyo Tech)

Keywords:near field, PHB, SNOM

Polarization separation in infrared spectroscopy is an essential method for quantitative analysis of organic materials. A scanning near-field optical microscope (SNOM), a type of scanning probe microscope, can measure the optical response of a sample in nanoscale.
In this study, by utilizing SNOM we measured in polyhydroxy butyric acid (PHB) spherulites which have the periodic higher order structure.
From spatial dependence of the absorption, we optically demonstrated the special higher-order structure of PHB.