1990 Fiscal Year Final Research Report Summary
Scanning Tunneling Microscopic Observation of Adsorbed Polymer Chains
| Project/Area Number |
63470089
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子物性
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| Research Institution | Mie University |
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Principal Investigator |
TAKAHASHI Akira Mie Univ., Faculty of Eng., Professor, 工学部, 教授 (70023009)
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| Project Period (FY) |
1988 – 1990
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| Keywords | Scanning Tunneling Microscope / Adsorption / Polymer / Poly (N-vinylcarbazole) / Amylose / DNA / Carrageenan |
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| Research Abstract |
Molecular shape and conformations of several polymers adsorbed or deposited on graphite surfaces were observed by a scanning tunneling microscope (STM). Iodine doped poly (N-vinylcarbazole) (PVCZ) which is a flexible polymer was deposited on the graphite and global shapes of PVCZ could be observed. The observed spread shape corresponded to the theoretically predicted shape for an isolated adsorbed chain.
Double helix conformation of DNA could be observed and then STM observation of single helical structure of amylose molecules was attempted. Isolated single helical amylose molecules could be observed, whose length corresponds to molecular size and the pitch of helix corresponds to crystalline structure. The STM observation of kappa-carrageenan, which is a gel forming polyelectrolyte was also challenged, and we could succeed to observe not only helical structure of carrageenan molecule but also the junction zones of carrageenan gels.
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