Ordered Silica Microspheres Unsymmetrically Coated with Ag Nanoparticles, and Ag-Nanoparticle-Doped Polymer Voids Fabricated by Microcontact Printing and Chemical Reduction


  • This work was supported by the National Nature Science Foundation of China (Grant No. 90401020, 20534040) and the program for Changjiang Scholars and Innovative Research Team in University (No. IRT0422). Supporting Information is available online at Wiley InterScience or from the author.


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Silica microspheres unsymmetrically coated with Ag nanoparticles have been prepared by a modified microcontact printing method and chemical reduction. The tropism of the microspheres is controllable by adjusting the microcontact printing procedure. Transfer of the microspheres onto a polymer-coated substrate, followed by coating with an evaporated gold film and subsequent etching of the silica microspheres gives Ag-nanoparticle-doped polymer and gold composite voids.