Nanostructure Control

In the Nanoanalysis group our research capabilities ranges from detailed analysis of molecular structures essential to charge transport in organic thin film devices, all the way to thorough studies of complete devices to allow investigation of the processes within. 

The group looks to control thin film microstructure with a range of solution processing techniques. We achieve a wide range of microstructures via spin coating, inkjet printing, drop casting and spray coating.

Zone Casting

One of the main branches of the Nanoanalysis group is based on the development of the zone casting technique, an adaptable solution processing technique to produce films of highly ordered organic material. Through careful control of the evaporation conditions, we can control molecular orientation, domain size and alignment for highly reporoducible crystallisation. Our current set-up can print on large area flexible substrates (15 x 15 cm2). Control of material structure on the micro- and nano- length scale is essential for efficient charge transport in all forms of plastic electronic device: OPV, OFET and OLED. We use a range of techniques to understand the complex properties of the organic thin films, such as Atomic Force Microscopy, Raman spectroscopy, and Transient Absorption Spectroscopy.

 Please read more:

ACS Nano, 2013, 7 (9), pp 7983–7991 

 J. Mater. Chem. C, 2014,2, 10110-10115 

Spray SystemWe have also been developing the spray coating technique, which offers:

>> An easy way of making thin film with a simple apparatus

>> Relatively low material consumption 

>> Suitable for fabrication of multilayer structure

  

Different MicrostructuresNanowires and blend films.