W. Lv, K. Lee, J. Li, T. Park, A.J. Hart, F. Zhang, J. Lahann. Anisotropic Janus catalysts for spatially controlled chemical reactions. Small 8(20):3116-3122, 2012. [http://dx.doi.org/10.1002/smll.201200192]

We describe a novel method for manufacturing of multicompartmental (“Janus”) inorganic particles using electrohydrodynamic (EHD) co-jetting of composite polymer-ceramic solutions, followed by thermal calcination at 500 C. A degradable organic polymer serves as a template and ensures homogeneous particle formation by co-jetting. Via this approach, catalytically active additives, such as magnetic nanocrystals can be placed on in one compartment of the Janus catalysts. We demonstrate spatially confined growth of carbon nanotubes on hemispheres of the calcined particles.