Development of Strutural Method for the Study of Two Dimensional Molecular Arrangement of Monolayers on the Surfaces of Water and Baseplate

研究水和基板表面单分子层二维分子排列的结构方法的发展

• 批准号: 62850010
• 负责人: MATSUSHITA Tadashi
• 金额: $ 5.44万
• 依托单位: National Laboratory for High Energy Physics
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62850010/
• 关键词: Synchrotron Radiation; Surface diffraction; ラングミュアー膜

In fiscal year of 1987, an X-ray gonimeter and a truph for surface diffraction study were prepared. In fiscal 1988 year, we confirmed that a good quality Langmuir film is formed on the surface of water using this truph. We performed a surface diffraction experiment from a monolayer film on the surface of water using this truph and synchrotron radiation beam available on a multipole wiggler beamline at the Photon factory, National Laboratory for High Energy Physics. For the case of arachidate specimen we observed a diffraction peak even at medium surface tension region where it is believed that liquid phase of the two dimensional system is formed. This peak moved from low angle to higher angle as the surface tension is increased reflecting that the intermolecular distance is shortened. At higher tension region where it is believed that a solid phase is formed, the diffraction peak became sharper,but the angle position stayed constant. in the presence of cadmium ion in the water, a diffraction peak was observed even at very low surface tension region where it is believed that a gas phase of the two dimensional system is formed.The angle position of this peak stayed constant, while the peak intensity increase as the surface tension was increased. This may be interpreted that island like structures are formed even at very low surface tension, and these structures grows as the surface tension is increased.As described above, we were successful in extracting useful information on the two dimensional structure of monolayer films on the surface of water using a surface diffraction technique.

在1987财政年度，制备了X射线分子和表面衍射研究的TRUPH。在1988财政年度，我们确认使用此Truph在水面上形成了高质量的Langmuir膜。我们使用此Truph和同步辐射束在水面的多极灯笼梁线上可在国家高能物理实验室的Photon Factory的多极的灯笼上可用，从水面上的单层膜进行了表面衍射实验。对于Arachidate样品的情况，我们观察到衍射峰，即使在中表面张力区域，也认为形成了两个维系统的液相。随着表面张力的增加，该峰从低角度转移到更高角度，反映了分子间距离缩短。在较高的张力区域，人们认为形成了固相，衍射峰变得更加尖锐，但是角度位置保持恒定。在水中存在镉离子的情况下，即使在非常低的表面张力区域也观察到衍射峰，在该区域中，人们认为形成了两维系统的气相。该峰的角度位置保持恒定，而随着表面张力的增加，峰强度的增加。这可以解释说，即使在非常低的表面张力下也形成岛屿，这些结构随着表面张力的增加而增长。如上所述，我们成功地提取了有关使用表面衍射技术在水面上单层膜的二维结构的有用信息。