The application of heterosupramolecular assemblies to device fabrication is discussed. This approach to nanoscale device architecture is versatile with several methods of solar energy conversion examined that allow the evolution of H-2 and/or O-2 through visible solar irradiance. Treatment of industrial waste streams is proposed that would allow the removal of organic pollutants whilst producing a chemical fuel in the form of pure H-2. Also of great potential within this system are the analytical properties of an organic sensor. By monitoring the photocurrent within the device as organic pollutants degrade, the identification of pollutant species and concentrations of mixtures in industrial waste streams could provide a versatile analytical tool. (C) 2003 Elsevier B.V. All rights reserved.