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Special Issue "Metal Nanoparticles 2012"

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A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 September 2012)

Special Issue Editor

Guest Editor
Prof. Dr. Miguel Jose Yacaman (Website)

Chemical Engineering Department, The University of Texas at Austin, Room CPE 5.404, 1 University Station C0400, Austin, TX 78712, USA
Interests: metal particles; electron microscopy; electron diffraction; catalysis; nanotechnology; synthesis of new materials

Special Issue Information

Dear Colleagues,

Metal nanoparticles are one cornerstones of modern nanotechnology. Many of the current and future applications of the field are based on metal nanoparticles. For instance in the biomedical area Gold nanoparticles have long been used for research. Silver nanoparticles antibacterial properties are now incorporated in many commercial products worldwide. Despite of vast research on the field many problems remain outstanding and pose very important scientific and technological challenges. In this special issue we call authors to send contributions on the following topics:

  • Advances on controlled synthesis of metal nanoparticles: The era in which any synthesis method was acceptable is over. There is a need of increasing the control on the size, shape and crystalline structure of the nanoparticles. The report of reproducible synthesis methods implies a more detailed description of parameters.
  • New characterization methods for nanoparticles: It is necessary to learn more about the exact structure of the nanoparticles. Is there any internal stress? Can we measure the internal stress? Is there different crystallography for the same metal? What is the composition of the surface of the nanoparticles? This and other questions may require advanced characterization methods such as aberration corrected electron microscopy, EELS, atomically resolved EDS, Raman, XPS, etc.
  • New shapes and metals. Most of papers have dealt with Au, Ag, Cu, Pd and Pt. We welcome papers on metal nanoparticles which have been scarcely explored such as Bi, Pb and all transition metals. We also encourage the report of new shapes of nanoparticles.
  • Properties of nanoparticles: Especially related to applications in biomedicine and diagnosis methods. SERS applications are also welcome.

Prof. Dr. Miguel Jose Yacaman
Guest Editor

Keywords

  • metal nanoparticles
  • aberration corrected microscopy
  • SERS applications
  • controlled synthesis
  • catalysis
  • shape of nanoparticles
  • nanotechnology

Published Papers (2 papers)

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Research

Open AccessArticle Hardness and Elastic Modulus on Six-Fold Symmetry Gold Nanoparticles
Materials 2013, 6(1), 198-205; doi:10.3390/ma6010198
Received: 6 November 2012 / Revised: 20 December 2012 / Accepted: 6 January 2013 / Published: 14 January 2013
Cited by 8 | PDF Full-text (490 KB) | HTML Full-text | XML Full-text
Abstract
The chemical synthesis of gold nanoparticles (NP) by using gold (III) chloride trihydrate (HAuCl∙3H2O) and sodium citrate as a reducing agent in aqueous conditions at 100 °C is presented here. Gold nanoparticles areformed by a galvanic replacement mechanism as described [...] Read more.
The chemical synthesis of gold nanoparticles (NP) by using gold (III) chloride trihydrate (HAuCl∙3H2O) and sodium citrate as a reducing agent in aqueous conditions at 100 °C is presented here. Gold nanoparticles areformed by a galvanic replacement mechanism as described by Lee and Messiel. Morphology of gold-NP was analyzed by way of high-resolution transmission electron microscopy; results indicate a six-fold icosahedral symmetry with an average size distribution of 22 nm. In order to understand the mechanical behaviors, like hardness and elastic moduli, gold-NP were subjected to nanoindentation measurements—obtaining a hardness value of 1.72 GPa and elastic modulus of 100 GPa in a 3–5 nm of displacement at the nanoparticle’s surface. Full article
(This article belongs to the Special Issue Metal Nanoparticles 2012)
Open AccessArticle Morphological Effect of Pd Catalyst on Ethanol Electro-Oxidation Reaction
Materials 2012, 5(9), 1686-1697; doi:10.3390/ma5091686
Received: 27 June 2012 / Revised: 31 July 2012 / Accepted: 13 August 2012 / Published: 19 September 2012
Cited by 23 | PDF Full-text (933 KB) | HTML Full-text | XML Full-text
Abstract
In the present study, three different structures with preferentially exposed crystal faces were supported on commercial carbon black by the polyol method (nanoparticles (NP/C), nanobars (NB/C) and nanorods (NR/C)). The electrocatalysts were characterized by XRD, TEM, TGA and cyclic voltammetry at three different ethanol concentrations. Considerable differences were found in terms of catalytic electroactivity. At all ethanol concentrations, the trend observed for the ethanol oxidation peak potential was preserved as follows: NB/C < NP/C< NR/C < commercial Pd/C. This result indicates that, from a thermodynamics point of view, the NB/C catalyst enclosed by Pd(100) facets presented the highest activity with respect to ethanol electro-oxidation among all of the catalysts studied. Full article
(This article belongs to the Special Issue Metal Nanoparticles 2012)

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