Development of novel materials for polarized emission based on inorganic nanosheet liquid crystals

2015 Fiscal Year Final Research Report

• Project/Area Number: 26620195
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: Nakato Teruyuki 九州工業大学, 大学院工学研究院, 教授 (10237315)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 無機工業材料 / 層状・層間化合物 / 無機ナノシート / コロイド / 液晶 / 偏光発光

Outline of Final Research Achievements

Colloidal liquid crystals of niobate nanosheets obtained by exfoliation of layered niobate formed a macroscopically organized structure with a unidirectional nanosheet alignment, and the macroscopic structure was utilized as a support of fluorescent dye for polarized emission. The unidirectional nanosheet alignment was achieved if the sample was dialyzed with an appropriate electrolyte solution. The electric conductivity and pH of the samples for the unidirectional alignment was elucidated. Ruthenium bypiridine complex, a nonpolarized fluorescent dye, was introduced to the unidirectionally aligned nanosheet liquid crystal. The dye showed intense emission by the excitation with the light polarized in parallel to the nanosheets, demonstrating polarized emission of the supported dye. The emission anisotropy R was estimated as 0.23.

Free Research Field

無機材料化学