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Study of Functional LB Films consisting of calixquinone and calixhydroquinone

杯醌和杯氢醌功能LB膜的研究

基本信息

批准号：
12650806
负责人：
SUGA Kosaku
金额：
$ 1.79万
依托单位：
TOKYO INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

(1). Polyion complexed mixed LB films of amphiphiles with long fluorocarbon (FC) chains and those with long hydrocarbon (HC) chains, deposited on Si substrates were characterized by atomic force microscopy/friction force microscopy (AFM/FFM). These results show that the amphiphile molecules with long HC chain which have a bulky probe unit at the position in the methylene chain close to head group can mix well with the amphiphile molecules with long FC chains. According to the π-A isotherms for these amphiphiles with bulky probe unit, the molecular sectional area in the monolayers for these amphiphile molecule increased as the position of the probe unit approached to the head group. Since the cohesion energy for molecules decrease with the increase in the inter-molecular distance, the molecular mixing between the amphiphile with FC chain and that with HC chain which have a bulky probe unit at the position closer to head group can be attributed to the decrease of cohesion energy due to t … More he increase in the inter-molecular distance.(2). Origins of peak broadening in a histogram of measured adhesive forces were studied. The adhesive forces were measured in water by pulsed-force-mode atomic force microscopy. One sample was prepared by a micro contact printing method on a sputtered gold film with fine grains, on which CH_3- and COOH-terminated regions were produced. Gold surfaces of other samples were chemically modified homogeneously by a self-assembling method in solution. Their surfaces were, however, topographically different, i.e. (i) an Au(111)- terrace-rich gold film prepared by vacuum vapor deposition at high temperature and (ii) sputtered gold films on cover glass with different grain sizes obtained by different deposition time. These sample surfaces and the probe tip surface were all CH_3-terminated by selfassembled monolayers with CH_3(CH_2)_<19>SH. The main origin of peak broadening in the histogram was the topographic effect. Namely, the change in the grain sizes and the change in multiplicity of contacts between the tip and convexities of the grains resulted in the distribution of the observed adhesive forces. Less

（一）.用原子力显微镜/摩擦力显微镜（AFM/FFM）研究了长碳氟链（FC）和长碳氢链（HC）两亲分子在Si衬底上形成的聚离子复合混合LB膜。这些结果表明，具有长HC链的两亲分子在靠近头基的亚甲基链上具有大体积探针单元，可以与具有长FC链的两亲分子很好地混合。根据大体积探针单元的两亲分子的π-A等温线，这些两亲分子的单分子膜中的分子截面积随着探针单元的位置接近头基而增加。由于分子的内聚能随分子间距离的增加而减小，因此，具有FC链的两亲分子和具有HC链的两亲分子之间的分子混合可以归因于在更靠近头基的位置处具有大体积探针单元的两亲分子之间的内聚能的减小。 ...更多信息分子间距离的增加。（二）、研究了测得的粘附力的直方图中峰加宽的起源。通过脉冲力模式原子力显微镜在水中测量粘附力。其中一个样品是用微接触印刷法在溅射金膜上制备的，在金膜上形成了CH_3和COOH封端区。其他样品的金表面化学改性均匀的自组装方法在溶液中。然而，它们的表面形貌不同，即（i）在高温下通过真空气相沉积制备的富含Au（111）平台的金膜和（ii）通过不同沉积时间获得的具有不同晶粒尺寸的在盖玻璃上的溅射金膜。这些样品表面和探针针尖表面均由CH_3（CH_2）_ SH自组装单分子膜修饰<19>。直方图中峰增宽的主要来源是地形效应。也就是说，晶粒尺寸的变化和晶粒的尖端和凸度之间的接触的多样性的变化导致所观察到的粘附力的分布。少