Study of Functional LB Films consisting of calixquinone and calixhydroquinone
| Project/Area Number |
12650806
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
工業物理化学
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| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
SUGA Kosaku Tokyo Institute of Technology, Graduate School of Bioscience and Biotechnology, Associate Professor, 大学院生命理工学研究科, 助教授 (90016642)
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| Co-Investigator(Kenkyū-buntansha) |
SAKURAI Minoru Tokyo Institute of Technology, Graduate School of Bioscience and Biotechnology, Professor, 大学院生命理工学研究科, 教授 (50162342)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | calixquinone / calixhydroquinone / functional LB film / oxidation-reduction reaction / molecular-recognition / self-assembled monolayer / atomic force microscopy / adhesive force |
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| Research Abstract |
(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
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Report
(4 results)
Research Products
(15 results)
