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- W1968603243 abstract "The galvanic replacement reaction between silver nanostructures and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mrow><mml:msup><mml:mrow><mml:msub><mml:mrow><mml:mtext>A</mml:mtext><mml:mtext>u</mml:mtext><mml:mtext>C</mml:mtext><mml:mtext>l</mml:mtext></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:mo>-</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>solution has recently been demonstrated as a versatile method for generating metal nanostructures with hollow interiors. Here we describe the results of a systematic study detailing the morphological, structural, compositional, and spectral changes involved in such a heterogeneous reaction on the nanoscale. Effects of Ar or O 2 gas bubbling for the formation of Ag-Au alloy nanoparticles by the galvanic replacement between spherical Ag nanoparticles and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mrow><mml:msup><mml:mrow><mml:msub><mml:mrow><mml:mtext>A</mml:mtext><mml:mtext>u</mml:mtext><mml:mtext>C</mml:mtext><mml:mtext>l</mml:mtext></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:mo>-</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>especially were studied in ethylene glycol (EG) at<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mrow><mml:msup><mml:mrow><mml:mn>150</mml:mn></mml:mrow><mml:mrow><mml:mo>°</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>C. The shape, size, and composition changes occur rapidly under O 2 bubbling in comparison with those under Ar bubbling. The major product after 60 min heating under Ar gas bubbling was perforated Ag-Au alloy particles formed by the replacement reaction and the minor product was ribbon-type particles produced from splitting off some perforated particles. On the other hand, the major product after 60 min heating under O 2 gas bubbling was ribbon-type particles. In addition, small spherical Ag particles are produced. They are formed through rereduction of Ag + ions released from the replacement reaction and oxidative etching of Ag nanoparticles by O 2 /Cl − in EG." @default.
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- W1968603243 date "2013-01-01" @default.
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- W1968603243 title "Effects of Ar or O2Gas Bubbling for Shape, Size, and Composition Changes in Silver-Gold Alloy Nanoparticles Prepared from Galvanic Replacement Reaction" @default.
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- W1968603243 doi "https://doi.org/10.1155/2013/425071" @default.
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