教學(xué)周
報(bào)告題目:Supramolecular Strategy to Ferroelectrics and Multiferroics
報(bào) 告 人:Takayoshi Nakamura 教授 (北海道大學(xué))
報(bào)告時(shí)間:2024年11月4日上午 10:00-12:00
報(bào)告地點(diǎn):國(guó)際有序物質(zhì)科學(xué)研究院2樓會(huì)議室(202)
報(bào)告人簡(jiǎn)介:Takayoshi Nakamura教授,1982至1989年于日本東京大學(xué)化學(xué)系畢業(yè),獲得學(xué)士、碩士以及博士學(xué)位。1992至1993年任威爾斯大學(xué)理學(xué)院訪(fǎng)問(wèn)科學(xué)家,1993至1994年擔(dān)任日本國(guó)家材料與化學(xué)研究所資深研究員,1997年至今擔(dān)任北海道大學(xué)電子科學(xué)研究所教授。主要從事分子組裝系統(tǒng)開(kāi)發(fā)有機(jī)導(dǎo)體,磁體和鐵電體的研究工作,包括超分子轉(zhuǎn)子結(jié)構(gòu)的導(dǎo)體、磁性材料、電介質(zhì)的開(kāi)發(fā);開(kāi)發(fā)使用混合價(jià)多金屬氧酸鹽的新型電子材料;使用金屬絡(luò)合物開(kāi)發(fā)新型多孔材料等。
報(bào)告內(nèi)容:Molecular machines have undergone comprehensive investigation, leading to the reporting of various artificial molecular machines encompassing molecular motors, propellers, switches, and shuttles. Our focus lies in the development of supramolecular systems demonstrating molecular motion within crystals. Within a crystal lattice, molecules assume fixed positions, forming a directional and high-density array. The coordinated motion of individual molecules, facilitated by intermolecular interactions, induces diverse functionalities in crystals, such as polarity conversion and mass transport, resulting from the periodic nature of these crystals. In addition to a comprehensive introduction to dielectrics and molecular ferroelectrics, this talk will discuss recent progress in low-dimensional ferroelectrics and type I multiferroics based on supramolecular approaches.
報(bào)告題目:Solid-solution Strategy for Functional Molecular Ionic Crystals
報(bào) 告 人:Ryo Tsunashima 副教授 (山口大學(xué))
報(bào)告人簡(jiǎn)介:Ryo Tsunashima于2007年在北海道大學(xué)Takayoshi Nakamura教授的指導(dǎo)下完成了博士學(xué)位。之后,在格拉斯哥大學(xué)Leroy Cronin教授的小組中擔(dān)任研究助理。2009年在山口大學(xué)任副教授,主要研究方向?yàn)槎嘟饘傺跛猁}、配位化合物、有機(jī)分子等分子多核金屬配合物的分子基固態(tài)化學(xué)。近年來(lái),其研究集中在分子離子晶體的固溶體。
報(bào)告內(nèi)容:Solid-solution is common materials strategy to tuning properties and functionality of the inorganic solids, where differences in radius of ions are below 15% known as Hume-Rothery rules. Structural similarity is key requirement for high solubility in the lattice. Thus, molecular crystals are not the better solid-state materials to be dissolved at the molecular level. The easier the molecule is to be dissolved in the lattice, the less dramatic the change in the physical properties and characteristics of the resulting solid solution. We have been developed solid-solution of the heteromorphic molecules which are usually not form solid solution. Solid-solution methodology for metal-free perovskite compounds will be discussed with our recent papers.
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