期刊
SMALL
卷 5, 期 1, 页码 112-119出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.200801002
关键词
annealing; nanocrystals; scanning probe microscopy; self-assembly; thin layers
类别
资金
- ESF-SONS2-SUPRAMATES
- Regione Emilia-Romagna PRIITT Nanofaber Net-Lab
- EU [MEST-CT-2004-008128, MRTN-CT-2006-035810]
Temperature-enhanced solvent vapor annealing (TESVA) is used to self assemble functionalized polycyclic aromatic hydrocarbon molecules into ordered macroscopic layers and crystals on solid surfaces. A novel C-3 symmetric hexa-peri-hexabenzocoronene functionalized with alternating hydrophilic and hydrophobic side chains is used as a model system since its multivalent character can be expected to offer unique self-assembly properties and behavior in different solvents. TESVA promotes the molecule's long-range mobility, as proven by their diffusion on a Si/SiOx surface on a scale of hundreds of micrometers. This leads to self-assembly into large, ordered crystals featuring an edge-on columnar type of arrangement, which differs from the morphologies obtained using conventional solution-processing methods such as spin-coating or drop-casting. The temperature modulation in the TESVA makes it possible to achieve an additional control over the role of hydrodynamic forces in the self-assembly at surfaces, leading to a macroscopic self-healing within the adsorbed film notably improved as compared to conventional solvent vapor annealing. This surface re-organization can be monitored in real time by optical and atomic force microscopy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据