[23p-E104-1~16] 12.6 Nanobiotechnology

▼ [23p-E104-7] A new interface-sensitive analytical method based on a combination of linear spectroscopy and informatics

〇(DC)Subin Song¹, Tomohiro Hayashi^1,2 (1.Tokyo TECH, 2.U. Tokyo)

Keywords:Interface, Vibrational spectroscopy, Infrared absorption microscopy

Processes at interfaces are paramount in chemical reaction, biology, tribology, and geology. Recently, it is revealed that the interfacial phenomenon is governed not only by the two-dimensional interface but also the interfacial region where molecules behave differently from the bulk system. Despite the high sensitivity of conventional analytical methods, the lack of information from the entire interfacial region and the challenge of quantitative analysis make it difficult to investigate the interfacial region. In this work, we developed a new surface-sensitive method based on attenuated total reflection infrared spectroscopy. By controlling the gap between sample and prism, a series of spectrums were recorded, and then the spectrum of interfacial water was extracted by informatics. The technique can detect the OH stretching modes of dangling OH bonds directing to a hydrophobic surface, demonstrating high surface-sensitivity of this method. The high surface sensitivity and the signal incorporating the entire interfacial region make this technique an ideal tool for the study of the interfacial phenomenon.