Room-temperature chemical synthesis of shape-controlled indium nanoparticles

Nam Hawn Chou, Xianglin Ke, Peter E Schiffer, Raymond E. Schaak

Research output: Contribution to journalArticlepeer-review

Abstract

Shape-controlled metal nanoparticles are of interest because of their wide range of properties that are useful for applications that include optics, electronics, magnetism, and catalysis. Indium metal is an attractive target for nanoparticle synthesis because it is superconducting, plasmonically active, and is a component in low-melting solders and solid-state lubricants. Indium nanoparticles are typically synthesized using harsh physical or chemical techniques, and rigorous shape control is difficult. Here we present a simple and robust kinetically controlled process for synthesizing shape-controlled indium nanoparticles. By controlling the rate of dropwise addition of a solution of NaBH4 in tetraethylene glycol to an alcoholic solution of InCl3 and poly(vinyl pyrrolidone), indium nanoparticles are formed with shapes that include high aspect ratio nanowires and uniform octahedra and truncated octahedra. The zero-dimensional indium nanoparticles exhibit an SPR band centered around 400 nm, and all morphologies are superconducting (Tc = 3.4 K) with higher critical fields than bulk indium.

Original languageEnglish (US)
Pages (from-to)8140-8141
Number of pages2
JournalJournal of the American Chemical Society
Volume130
Issue number26
DOIs
StatePublished - Jul 2 2008

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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