Nanoprocessing based on bicontinuous microdomains of block copolymers: Nanochannels coated with metals

Langmuir

Volumn 13, Issue 26, 1997, Pages 6869-6872

  Hashimoto, Takeji ^a,b   Tsutsumi, Kiyoharu ^a   Funaki, Yoshinori ^a  

^a JAPAN SCIENCE AND TECHNOLOGY AGENCY   (Japan)

^b KYOTO UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

DEGRADATION; NANOTECHNOLOGY; NICKEL PLATING; PHASE SEPARATION; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY;

BICONTINUOUS MICRODOMAINS; NANOCHANNELS;

BLOCK COPOLYMERS;

EID: 0031359611     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la970967p     Document Type: Article

References (11)

1. Sadron, C.; Gallot, B. Makromol. Chem. 1973, 164, 301.
2. Hashimoto, T.; Shibayama, M.; Fujimura, M.; Kawai, H. In Block Copolymers-Science and Technology; Meier, D. J., Ed.; MMI Press/ Harwood Academic: New York, 1983; pp 63-108.
3. Thomas, E. L.; Alward, D. B.; Kinning, D. J.; Martin, D. C.; Handlin, D. L.; Fetters, L. J. Macromolecules 1986, 19, 2197. Hasegawa, H.; Tanaka, H.; Yamasaki, K.; Hashimoto, T. Macromolecules 1987, 20, 1651.
4. Thomas, E. L.; Alward, D. B.; Kinning, D. J.; Martin, D. C.; Handlin, D. L.; Fetters, L. J. Macromolecules 1986, 19, 2197. Hasegawa, H.; Tanaka, H.; Yamasaki, K.; Hashimoto, T. Macromolecules 1987, 20, 1651.
5. Hajduk, D. A.; Harper, P. E.; Gruner, S. M.; Honeker, C. C.; Kim, G.; Thomas, E. L.; Fetters, L. J. Macromolecules 1994, 27, 4063.
6. Tsutsumi, K.; Funaki, Y.; Kanazawa, Y.; Hashimoto, T. In preparation.
7. Nishikawa, Y.; Tsutsumi, K.; Koga, T.; Hashimoto, T. In preparation.
8. Lee, J.-S.; Hirao, A.; Nakahama, S. Macromolecules 1988, 21, 276.
9. One may suspect that the aqueous solution may not contact the exposed area of the nanochannels in the materials, because PS is the matrix of the materials with hydrophobicity and the nanochannels are on the order of 20-30 nm in diameter. However, after the ozonolysis the surfaces of nanochannels will become quite polar, having hydroxyl and carbonyl groups, and hence wet with the aqueous solution, as evidenced clearly by an almost complete coverage with nickel metals, as will be shown later in Figure 4.
10. The microdomain in Figure 1 (or Figure 4) is close to the image shown in part b or d in Figure 3 and hence to the image obtained with the ultrathin section cut nearly parallel to the (211) plane of the cubic phase. It appears to be tilted about 30° off the vertical, which may be due to deformation induced by the sectioning.
11. It might seem difficult to prepare ultrathin sections from the unsupported porous structure without crumbling. However, it was actually possible to prepare the sections, partly because the Ni coating on the surface of the nanochannels may reinforce the materials and the PS matrix is continuous, and occupying 66% of volume of the materials. We deliberately used thick samples, thicker than 100 μn, for the ultrathin sectioning of the nanoprocessed materials. Here a undegraded part of the specimen may help to prevent the degraded part from being severely crumbled in the sectioning process.