Bulk synthesis and surface patterning of nanoporous metals and alloys from supraspherical nanoparticle aggregates

Rafal Klajn*, Timothy P. Gray, Paul J. Wesson, Benjamin D. Myers, Vinayak P Dravid, Stoyan K. Smoukov, Bartosz A. Grzybowski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

Supraspheres (SS) composed of hundreds to thousands of metal nanoparticles (NPs) and crosslinked by dithiol linkers are assembled into larger structures, which are subsequently converted into nanoporous metals (NMs). Conversion is achieved by heating which removes organic molecules stabilizing the NPs and allows for NP fusion. Heating of SS solutions leads to NMs of overall macroscopic dimensions; localized radiation using collimated electron beam is used to prepare metallized surface micropatterns. Depending on the composition of supraspherical precursors, nanoporous materials composed of up to three metals can be obtained. Strategies for controlling pore size and nanoscale surface roughness of these materials are discussed.

Original languageEnglish (US)
Pages (from-to)2763-2769
Number of pages7
JournalAdvanced Functional Materials
Volume18
Issue number18
DOIs
StatePublished - Sep 23 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

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