Issue 4, 2014
From the journal:

CrystEngComm

Growth behaviours of pentacene films confined in engineered shapes of ionic-liquid in vacuum†

Yoko Takeyama,ab   Shinji Mantoku,a   Shingo Maruyamaa  and  Yuji Matsumoto*ac  

* Corresponding authors

a Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

b Faculty of Symbiotic Systems Science, Fukushima University, 1, Kanayagawa, Fukushima, Japan

c Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aramaki Aza Aoba, Aoba-ku, Sendai, Japan
E-mail: matsumoto@atomol.che.tohoku.ac.jp
Fax: +81 22 795 7268
Tel: +81 22 795 7266

Abstract

Ionic liquid (IL) films not only in the form of micro-droplets, but also of a homogeneously thick submicron-layer were deposited under vacuum on indium tin oxide (ITO) substrates by chemically modifying their wettability to the substrate. When pentacene was deposited on these IL-coated ITO substrates, pentacene crystals were grown via the IL. Depending on the shape and size of the IL films: a small-droplet (ϕ: 5 μm), a large-droplet (ϕ: 20 μm) and a homogeneously thick layer (about 0.1 μm in thickness), there were found significant differences in the growth behaviour of pentacene and the resultant adhesion ability of these pentacene films to the substrate, the mechanism of which is discussed with the aid of in situ observation of the crystal growth process in the IL in view of the wettability of the IL, the nucleation and the subsequent growth of the pentacene crystals.

Graphical abstract: Growth behaviours of pentacene films confined in engineered shapes of ionic-liquid in vacuum

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Article information

DOI
https://doi.org/10.1039/C3CE41473F
Article type
Paper
Submitted
25 Jul 2013
Accepted
25 Oct 2013
First published
04 Dec 2013

CrystEngComm, 2014,16, 684-689

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Growth behaviours of pentacene films confined in engineered shapes of ionic-liquid in vacuum

Y. Takeyama, S. Mantoku, S. Maruyama and Y. Matsumoto, CrystEngComm, 2014, 16, 684 DOI: 10.1039/C3CE41473F

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