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Title: Synthesis of nanoparticles in helium droplets—A characterization comparing mass-spectra and electron microscopy data

Micrometer sized helium droplets provide an extraordinary environment for the growth of nanoparticles. The method promises great potential for the preparation of core-shell particles as well as one-dimensional nanostructures, which agglomerate along quantum vortices, without involving solvents, ligands, or additives. Using a new apparatus, which enables us to record mass spectra of heavy dopant clusters (>10{sup 4} amu) and to produce samples for transmission electron microscopy simultaneously, we synthesize bare and bimetallic nanoparticles consisting of various materials (Au, Ni, Cr, and Ag). We present a systematical study of the growth process of clusters and nanoparticles inside the helium droplets, which can be described with a simple theoretical model.
Authors:
; ; ; ; ;  [1] ; ;  [2]
  1. Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz (Austria)
  2. Institute for Electron Microscopy and Nanoanalysis & Graz Centre for Electron Microscopy, TU Graz, Steyrergasse 17, A-8010 Graz (Austria)
Publication Date:
OSTI Identifier:
22489677
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 143; Journal Issue: 13; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY; COMPARATIVE EVALUATIONS; DROPLETS; HELIUM; LIGANDS; MASS SPECTRA; NANOPARTICLES; NANOSTRUCTURES; SOLVENTS; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY