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Chemical Compostion Analysis on Sintered Gold and Platinum Nanoparticles

Published online by Cambridge University Press:  02 July 2020

S. Lu ,
N. Yao  and
I. A. Aksay
S. Lu
Affiliation:
Princeton Materials Institute, Princeton, NJ08540 Department of Chemical Engineering Princeton University, Princeton, NJ08540
N. Yao
Affiliation:
Princeton Materials Institute, Princeton, NJ08540
I. A. Aksay
Affiliation:
Princeton Materials Institute, Princeton, NJ08540 Department of Chemical Engineering Princeton University, Princeton, NJ08540
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Nanoparticles continue to attract interests because they fall into intermediate stage between molecular and macroscopic materials. Due to their large surface-to-volume ratio, nanoparticles exhibit physical and chemical properties that differ markedly from those characterizing the bulk solid state. One example is the phase diagram of a nanomaterial. Because nanocrystals display clear changes in both the thermodynamics and the kinetics of phase transitions, we expect different solubility limits in the nanometer regime. This means that phases unstable or unobserved in extended solids may be prepared as nanocrystals. We synthesized Au and Pt nanoparticles and performed chemical analysis on the sintered agglomerates.

The colloidal Au and Pt particles were synthesized according to Turkevich's method. An aqueous AuCl3 solution (50mg Au/L) was heated to 70°C. A determined amount of lwt% aqueous sodium citrate dihydrate (Na3C6H5O7.2H2O) solution was added such that the citrate-to-Au mass ratio was 10.

Type
Sir John Meurig Thomas Symposium: Microscopy and Microanalysis in the Chemical Sciences
Information
Microscopy and Microanalysis , Volume 6 , Issue S2: Proceedings: Microscopy & Microanalysis 2000, Microscopy Society of America 58th Annual Meeting, Microbeam Analysis Society 34th Annual Meeting, Microscopical Society of Canada/Societe de Microscopie de Canada 27th Annual Meeting, Philadelphia, Pennsylvania August 13-17, 2000 , August 2000 , pp. 28 - 29
Copyright
Copyright © Microscopy Society of America

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