Formation of Simple Molecular Glasses by Low-temperature Vapor-deposition and Thermodynamic and Structural Studies on them

低温气相沉积简单分子玻璃的形成及其热力学和结构研究

• 批准号: 22340119
• 负责人: YAMAMURO Osamu
• 金额: $ 12.48万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22340119/
• 关键词: 熱容量; エントロピー; X線回折; 蒸着法; ガラス転移; 低エネルギー励起; 化学物理; 物性実験; Ｘ線回折; 構造; アニール効果; 残余エントロピー

For low-temperature vapor-deposition experiments, we havemodified the adiabatic calorimeter and x-ray diffractometer in our laboratory, andconstructed a precise vapor-deposition line. We have measured the heat capacities of glassycarbon tetrachloride, propene and propane which are the simplest of the glassy molecularsubstances whose heat capacities have been measured before. Clear excess heat capacitiesat low temperatures and glass transitions were observed in these samples. The inelasticneutron scattering experiments revealed that the excess heat capacity is due to the bosonpeak characteristic to amorphous solids. The x-ray diffraction measurements ofvapor-deposited glassy water, propanol, and 1-pentane have clarified the relation betweenthe annealing effect around the glass transition temperature and hydrogen-bond structure.

针对低温气相沉积实验，我们对实验室的绝热热量计和X射线衍射仪进行了改造，构建了精密的气相沉积生产线。我们测量了玻璃态四氯化碳、丙烯和丙烷的热容，它们是最简单的玻璃态分子物质，其热容以前已被测量过。在这些样品中观察到明显的低温过剩热容和玻璃化转变。非弹性中子散射实验表明，超额热容是由于非晶固体的玻色子峰特征造成的。气相沉积玻璃水、丙醇和1-戊烷的X射线衍射测量阐明了玻璃化转变温度附近的退火效应与氢键结构之间的关系。

项目成果

Calorimetric and neutron scattering studies on vapor-deposited simple molecular glasses

气相沉积简单分子玻璃的量热和中子散射研究

• 发表时间: 2010
• 作者: O.Yamamuro;et al.
• 通讯作者: et al.

Glass transitions and boson peaks of vapor-deposited simple molecular glasses

气相沉积简单分子玻璃的玻璃化转变和玻色子峰

• 发表时间: 2011
• 作者: M. Kambe;D. Zhu;and S. Kinoshita;Y. Kawaguchi;岩澤英明;T. Hajiri;川口 由紀;O. Yamamuro;M. Ye;Gen Tatara;多々良源;Toru Morishita;平手聡;Masatoshi Tokita;O. Yamamuro
• 通讯作者: O. Yamamuro

Heat Capacities and Glass Transitions of Vapor-deposited Molecular Glasses

气相沉积分子玻璃的热容和玻璃化转变

• 发表时间: 2013
• 作者: M. Kambe;D. Zhu;and S. Kinoshita;Y. Kawaguchi;岩澤英明;T. Hajiri;川口 由紀;O. Yamamuro
• 通讯作者: O. Yamamuro