title: Fabrication of planar, layered nanoparticles using tri-layer resist templates.
abstract: A simple and universal pathway to produce free multilayer synthetic nanoparticles is developed based on lithography, vapor phase deposition and a tri-layer resist lift-off and release process. The fabrication method presented in this work is ideal for production of a broad range of nanoparticles, either free in solution or still attached to an intact release layer, with unique magnetic, optical, radioactive, electronic and catalytic properties. Multi-modal capabilities are implicit in the layered architecture. As an example, directly fabricated magnetic nanoparticles are evaluated to illustrate the structural integrity of thin internal multilayers and the nanoparticle stability in aggressive biological environments, which is highly desired for biomedical applications.
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Hu
authors.forename: Mingliang
authors.initials: M
authors.lastname: Zhang
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Wilson
authors.forename: Ai Leen
authors.initials: AL
authors.lastname: Koh
authors.forename: Jung-Sub
authors.initials: JS
authors.lastname: Wi
authors.forename: Mary
authors.initials: M
authors.lastname: Tang
authors.forename: Robert
authors.initials: R
authors.lastname: Sinclair
authors.forename: Shan X
authors.initials: SX
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D008280:Magnetics; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000191:economics / Q000379:methods*; D013499:Surface Properties