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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Star-shaped oligofluorene nanostructured blend materials : controlled micro-patterning and physical characteristics

Wu, M. and Gu, E. and Zarowna, A. and Kanibolotsky, A.L. and Kuehne, A.J.C. and Mackintosh, A.R. and Edwards, P.R. and Rolinski, O.J. and Skabara, P.J. and Martin, R.W. and Pethrick, R.A. and Birch, D.J.S. and Dawson, M.D. (2009) Star-shaped oligofluorene nanostructured blend materials : controlled micro-patterning and physical characteristics. Applied Physics A: Materials Science and Processing, 97 (1). pp. 119-123. ISSN 0947-8396

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Abstract

Star-shaped oligofluorene consists of highly-fluorescent macromolecules of considerable interest for organic electronics. Here, we demonstrate controlled micro-patterning of these organic nanostructured molecules by blending them with custom-synthesized photo-curable aliphatic polymer matrices to facilitate solventless inkjet printing. The printed microstructures are spherical with minimum dimensions of 12 μm diameter and 1 μm height when using a cartridge delivering ∼1 pL droplets. We evaluate the physical characteristics of the printed structures. Photoluminescence studies indicate that the blend materials possess similar fluorescence properties to neat materials in solid films or toluene solution. The fluorescence lifetime consists of two components, respectively 0.68±0.01 ns (τ 1) and 1.23±0.12 ns (τ 2). This work demonstrates that inkjet printing of such blends provides an attractive method of handling fluorescent nano-scaled molecules for photonic and optoelectronic applications.