Aligned growth of TIPS pentacene crystalline domains adhered to Au stripes formed on SiO2 surfaces

作者：Onojima Norio^*; Nakamura Ayato; Saito Hiroki; Daicho Norihiro

来源：Journal of Crystal Growth, 2015, 432: 146-151.

DOI：10.1016/j.jcrysgro.2015.09.030

• Growth from solutions
• Graphoepitaxy
• Organic compounds
• Semiconducting materials

6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) was electrosprayed onto SiO2/Si substrates with Au stripes, and we observed that the crystalline domains adhered to the Au stripes were preferentially oriented. To understand this phenomenon, the dynamic behavior of a microdroplet on the Austriped SiO2 surface was studied based on real-time monitoring. We found that the contact line of the microdroplet proceeded along the Au stripe. Since crystallization occurs at the contact line, TIPS pentacene can grow as the contact line proceeds along the Au stripe. Therefore, the fast growth axis in the TIPS pentacene crystal structure can be aligned in the stripe direction. This consideration was supported by the result of angle-dependent polarized Raman spectroscopy of the crystalline domains adhered to the Au stripes.

• 出版日期2015-12-15