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Orientation of xanthene adsorbate molecules at dielectric interfaces
Affiliation:1. Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Polytekhnicheskaya Street, 29, 195251, Russia;2. Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India;1. Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China;2. Key Laboratory of Low-Dimensional Materials and Application Technology (Ministry of Education) and School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China;3. Institute of Nanosurface Science and Engineering, Shenzhen University, Shenzhen 518060, China;4. NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore;1. Energy Process Research Institute (EPRI), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba 305-8569, Japan;2. National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, 305-8565, Japan;3. Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan
Abstract:The polarization dependence of the second harmonic signal from monolayers of xanthene dyes allows us to develop a model for the orientation of the adsorbates and to locate the group responsible for adsorption. Possible extension of this method to other dyes of biological and medical interest is discussed.
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