Self-organization of phthalocyanine molecules along the atomic step arrays on sapphire

Takayoshi Hayashi; Akira Yamashita; Tohru Maruno; Stefan Foelsch; Shiro Matsumoto; Hideo Konami; Masahiro Hatano

doi:10.1117/12.237063

26 April 1996 Self-organization of phthalocyanine molecules along the atomic step arrays on sapphire

Takayoshi Hayashi, Akira Yamashita, Tohru Maruno, Stefan Foelsch, Shiro Matsumoto, Hideo Konami, Masahiro Hatano

Proceedings Volume 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials; (1996) https://doi.org/10.1117/12.237063
Event: 3rd International Conference on Intelligent Materials, 1996, Lyon, France

Abstract

An example of structural control of organic thin films by self-organization is described. Equally spaced parallel atomic step arrays exist on polished sapphire (1012) surface. Dibenzo [b, t] phthalocyaninato-Zn (II) (ZnDBPc) molecules deposited by UHV molecular- beam deposition on this surface stack themselves to form columnar crystal grains. Since the direction of these columns is parallel to the atomic step direction, thin films of ZnDBPc grown on the sapphire (1012) surfaces show unidirectional in-plane ordering over the entire substrate. The direction and spacing of the parallel atomic step arrays are directly related to the misorientation direction and angle of the polished surface from the exact (1012) surface. Therefore the ordering direction of the ZnDBPc thin film has no relation to the crystallographic axes of the sapphire, which is totally unlike ordinary epitaxial growth. Since the step spacings can be controlled over a wide range, we can expect to be able to improve the ordering by adjusting the step spacings to the lattice spacing of organic crystals.

Citation Download Citation

Takayoshi Hayashi, Akira Yamashita, Tohru Maruno, Stefan Foelsch, Shiro Matsumoto, Hideo Konami, and Masahiro Hatano "Self-organization of phthalocyanine molecules along the atomic step arrays on sapphire", Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); https://doi.org/10.1117/12.237063

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available