In situ deposition/positioning of magnetic nanoparticles with ferroelectric nanolithography

Ferroelectric nanolithography is a new approach to processing nanostructures, which can position multiple components made of various materials into predefined configurations. Local polarization in ferroelectric compounds is manipulated to control the surface electronic structure and direct attachment of molecules and particles. Here, the presence of optically excited electron-hole pairs on ferroelectric domains is confirmed, and reaction paths for photo reduction of several reactive metal particles are determined. Subsequent and simultaneous deposition of multiple metals is demonstrated, and the magnetic properties of Co based particles are confirmed. Comments Copyright Materials Research Society. Reprinted from Journal of Materials Research, Volume 20, Issue 3, March 2005, pages 712-718. Publisher URL: http://dx.doi.org/10.1557/JMR.2005.0093 This journal article is available at ScholarlyCommons: http://repository.upenn.edu/mse_papers/67 In situ deposition/positioning of magnetic nanoparticles with ferroelectric nanolithography Xiaojun Lei, Dongbo Li, Rui Shao, and Dawn A. Bonnell Department of Materials Science and Engineering, The University of Pennsylvania, Philadelphia, Pennsylvania 19104 (Received 17 August 2004; accepted 13 December 2004) Ferroelectric nanolithography is a new approach to processing nanostructures, which can position multiple components made of various materials into predefined configurations. Local polarization in ferroelectric compounds is manipulated to control the surface electronic structure and direct attachment of molecules and particles. Here, the presence of optically excited electron-hole pairs on ferroelectric domains is confirmed, and reaction paths for photo reduction of several reactive metal particles are determined. Subsequent and simultaneous deposition of multiple metals is demonstrated, and the magnetic properties of Co based particles are confirmed.