Growth behaviours of pentacene films confined in engineered shapes of ionic-liquid in vacuum
Growth behaviours of pentacene films confined in engineered shapes of ionic-liquid in vacuum
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DOI：
10.1039/c3ce41473f
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发表时间：
2014-01-01
期刊：
影响因子：
3.1
通讯作者：
Matsumoto, Yuji
中科院分区：
文献类型：
--
作者：
Takeyama, Yoko;Mantoku, Shinji;Matsumoto, Yuji
采用化学改性方法，在真空条件下，在氧化铟锡(ITO)衬底上沉积了离子液体(IL)薄膜，该薄膜不仅呈微滴状，而且具有均匀厚的亚微米层。当并五苯沉积在这些包覆有IL的ITO衬底上时，通过IL生长了并五苯晶体。根据IL膜的形状和尺寸：小液滴(Phi：5微米)、大液滴(Phi：20微米)和均匀厚的层(约0.1微米厚)，并五苯的生长行为和由此产生的五苯薄膜对衬底的附着能力存在显著差异。从IL的润湿性、五苯晶体的成核和后续生长的角度，通过对IL中晶体生长过程的原位观察，讨论了这种差异的机理。
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 (phi: 5 mu m), a large-droplet (phi: 20 mu m) and a homogeneously thick layer (about 0.1 mu m 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.