| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.169 |
| 발표분야 | 고분자 합성 |
| 제목 | The Microstructure and Morphology of Supramolecules on the Self-Assembled Monolayers |
| 초록 | Self-assembling materials such as block copolymers, surfactants, colloids have been noticed as a powerful template for lithography because they are self-assembled to regularly ordered structures with nanometer-size. Especially, hexagonal cylinder mesophases have been interested, since the elimination of the selective component makes the materials of nanoscopic media with regularly ordered nanometer-sized pores. Although Block copolymers have been interested, since the stability and the thin film characteristic of them are superior to other self-assembling materials’, block copolymers which form the hexagonal cylinders has a disadvantage that it is very difficult to control their orientation on the substrate. It is essential that molecular orientation be controlled for nano-patterned structures. Recently, for block copolymers, two approaches have been made to align the cylinders normal to substrates. It was represented that the cylinders align homeotropically, since a selective interaction with substrate is removed by a neutral surface treatment under the ordered cylinders of diblock copolymers. The other one is that high electric field was also applied for the ordered cylinders of poly (styrene) – poly (methyl methacrylate) diblock copolymer. Although the cylinders align homeotropically, both methods require an additional surface treatment as well as strong electric fields. Recently, we reported that the orientation of supramolecules making the structure of the hexagonal columnar phases could be controlled by surface anchoring, and a high degree of alignment was indicated by transmission electron microscopy (TEM). We describe the surface order and morphology of supramolecule forming fh on the self-assembled monolayers (SAMs). SAMs are highly ordered molecular assemblies that form spontaneously by chemisorption of functionalized molecules on surfaces, and organize themselves laterally, most commonly by van der Waals interactions between monomers. We expect that the orientation of supramolecule can be controlled by treating different SAMs on the substrate. We show this control of orientation by using atomic force microscopy (AFM) and TEM. This research will be meaningful to develop the lithography with nanometer size using supramolecules. |
| 저자 | 이은호1, 정진미1, 김연아2, 김건철2, 정희태1 |
| 소속 | 1한국과학기술원, 2충남대 |
| 키워드 | SAM; Surface treatment; Orientation; AFM; TEM |
