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      • Record: found
      • Abstract: found
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      Nanoporous Gold: Fabrication, Characterization, and Applications

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          Abstract

          Nanoporous gold (np-Au) has intriguing material properties that offer potential benefits for many applications due to its high specific surface area, well-characterized thiol-gold surface chemistry, high electrical conductivity, and reduced stiffness. The research on np-Au has taken place on various fronts, including advanced microfabrication and characterization techniques to probe unusual nanoscale properties and applications spanning from fuel cells to electrochemical sensors. Here, we provide a review of the recent advances in np-Au research, with special emphasis on microfabrication and characterization techniques. We conclude the paper with a brief outline of challenges to overcome in the study of nanoporous metals.

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          An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments

          W.C. Oliver, G.M. Pharr (1992)
          The indentation load-displacement behavior of six materials tested with a Berkovich indenter has been carefully documented to establish an improved method for determining hardness and elastic modulus from indentation load-displacement data. The materials included fused silica, soda–lime glass, and single crystals of aluminum, tungsten, quartz, and sapphire. It is shown that the load–displacement curves during unloading in these materials are not linear, even in the initial stages, thereby suggesting that the flat punch approximation used so often in the analysis of unloading data is not entirely adequate. An analysis technique is presented that accounts for the curvature in the unloading data and provides a physically justifiable procedure for determining the depth which should be used in conjunction with the indenter shape function to establish the contact area at peak load. The hardnesses and elastic moduli of the six materials are computed using the analysis procedure and compared with values determined by independent means to assess the accuracy of the method. The results show that with good technique, moduli can be measured to within 5%.
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            Watersheds in digital spaces: an efficient algorithm based on immersion simulations

            Andrea Vincent, P. Soille (1991)
            Article 0 comments Cited 574 times – based on 0 reviews     Review now
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              Survey over image thresholding techniques and quantitative performance evaluation

              Bu¨lent Sankur (2004)
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                Author and article information

                Journal
                Journal ID (nlm-ta): Materials (Basel)
                Journal ID (iso-abbrev): Materials (Basel)
                Journal ID (publisher-id): materials
                Title: Materials
                Publisher: Molecular Diversity Preservation International
                ISSN (Electronic): 1996-1944
                Publication date (Electronic): 03 December 2009
                Publication date Collection: December 2009
                Volume: 2
                Issue: 4
                Pages: 2188-2215
                Affiliations
                [1 ]Center for Engineering in Medicine, Department of Surgery, Harvard Medical School, Massachusetts General Hospital, Shriners Hospitals for Children, Boston, MA 02114, USA
                [2 ]Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA 22904, USA; E-Mails: reed@ 123456virginia.edu (M.L.R.); begley@ 123456virginia.edu (M.R.B.)
                [3 ]Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904, USA
                [4 ]Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904, USA
                Author notes
                [* ]Author to whom correspondence should be addressed; E-Mail: eseker@ 123456partners.org ; Tel.: +1-434-409-9056.
                Article
                Publisher ID: materials-02-02188
                DOI: 10.3390/ma2042188
                PMC ID: 5513576
                SO-VID: 76f0dd80-3c02-4059-9aba-aac153dba566
                Copyright © © 2009 by the authors.
                License:

                Licensee Molecular Diversity Preservation International, Basel, Switzerland. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).

                History
                Date received : 27 October 2009
                Date revision received : 29 November 2009
                Date accepted : 02 December 2009
                Categories
                Subject: Review

                Keywords: nanoporous,gold,microfabrication,characterization,surface area,morphology,mems,catalyst,sensor,gold-silver alloy
                Data availability:
                Keywords: nanoporous, gold, microfabrication, characterization, surface area, morphology, mems, catalyst, sensor, gold-silver alloy

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