NANOSCALE CONTROL OF MOLECULAR DISPERSION-PHASE SEPARATION FOR TWO-DIMENSIONAL AGGREGATING SYSTEM

二维聚集体系分子分散相分离的纳米级控制

• 批准号: 09450039
• 负责人: OISHI Yushi
• 金额: $ 7.1万
• 依托单位: SAGA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450039/
• 关键词: MONOLAYER; BINARY SYSTEM; PHASE SEPARATION; COHESIVE ENERGY; MISCIBILITY GAP; SPINODAL DECOMPOSITION; II-A ISOTHERM; SCANNING PROBE MICROSCOPY; 表面圧-表面積曲線; 多成分系; 分子熱運動; 静電的相互作用; 原子間力顕微鏡; 水平力顕微鏡

Surface morphology of Langmuir mixed monolayer was investigated on the basis of a π-A isotherm measurement and a scanning probe microscopic observation. The molecular aggregating behavior of mixed monolayer markedly depended on difference in alkyl chain length, that is, cohesive energy between hydrophobic portions of fatty acids. The mixed monolayers for the cases of 4, 6 and 8 methylene units differences corresponding to 28, 42 and 56 kJ/mol for cohesive energy were in a molecular mixing state, phase separation in a miscibility gap and segregation in an immiscibility system, respectively. In particularly, the phase separated morphology was a co-continuous state, indicating the phase separation due to the spinodal decomposition. Moreover, the molecular aggregating state of the mixed monolayer changed from two-phase to one-phase with an increase in subphase temperature. This suggests that the mixed monolayer is assigned to the upper critical solution temperature type. The molecular aggregating behavior of the mixed monolayer was independent of the surface pressure for fatty acids in undissociated state, and also the monolayer phase of the single component system.

在π-A等温线测量和扫描探针显微镜观察的基础上，研究了朗缪尔混合单分子膜的表面形态。混合单分子膜的分子聚集行为明显依赖于烷基链长的不同，即脂肪酸疏水部分之间的结合能。4、6和8个亚甲基单元差对应的结合能分别为28、42和56kJ/mol的混合单分子膜分别处于分子混合状态、混相间隙中的相分离和不相溶体系中的分离状态。相分离形态为共连续状态，表明相分离是由调幅节点分解引起的。随着亚相温度的升高，混合单分子膜的分子聚集态由两相转变为一相。这表明混合单分子膜属于上临界溶液温度类型。混合单层膜的分子聚集行为与未解离状态下脂肪酸的表面压力无关，也与单组分体系的单层相无关。

项目成果

Yushi Oishi: "Nanotribology of behenic acid monolayer and its aggregation state"Colloids and Surfaces A.

Yushi Oishi：“山萮酸单层纳米摩擦学及其聚集状态”胶体和表面 A。

Miyuki Kuramori et al.: "Phase Separtion Behavior of (Palmitic Acid/Lignoceric Aci) Mixded Monolayer Based on a π-A Isotherm Measurement and a Scanning ProbeMicroscopic Observation"Bulletin of the Chemical Society of Japan. (in press).

Miyuki Kuramori 等人：“基于 π-A 等温线测量和扫描探针显微镜观察的（棕榈酸/Lignoceric Aci）混合单层的相分离行为”日本化学会公报（正在出版）。

Yushi Oishi et al.: "Molecular Patterning of a Guanidinium/Orotate Mixed Monolayer through Molecular Recognition with Flavin Adenine Dinucleotide"Langmuir. 13. 519-524 (1997)

Yushi Oishi 等人：“通过黄素腺嘌呤二核苷酸的分子识别对胍盐/乳清酸混合单层进行分子图案化”Langmuir。

Philippe Bissel: ""Heptopus",a novel class of amphiphiles with seven alkyl chains"Langmuir. 15・5. 1791-1795 (1999)

Philippe Bissel：““Heptopus”，具有七个烷基链的新型两亲物”15・5 1791-1795（1999）。

Yushi Oishi et al.: "Moire Pattern of Bilayered Fatty Acid Monolayers Based on Dark Field Imaging" Chem.Lett.565-566 (1998)

Yushi Oishi 等人：“基于暗场成像的双层脂肪酸单层的莫尔图案”Chem.Lett.565-566 (1998)