Silver nanostructures from Ag(CN) sub(2) super(-) reduction by citrate ions in the presence of dodecyl sulfate and Cu super(2+) ions. Synthesis and characterization
The synthesis of silver nanoparticles has been investigated using Ag(CN) sub(2) super(-) species as precursor, citrate ions as reducing agent, and dodecyl sulfate ions as stabilizer, at pH 11 and 97 degree C, in a batch stirred glass reactor. The role of Cu super(2+) ions in the synthesis was also s...
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Published in | Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 16; no. 2; pp. 1 - 14 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
01.02.2014
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Abstract | The synthesis of silver nanoparticles has been investigated using Ag(CN) sub(2) super(-) species as precursor, citrate ions as reducing agent, and dodecyl sulfate ions as stabilizer, at pH 11 and 97 degree C, in a batch stirred glass reactor. The role of Cu super(2+) ions in the synthesis was also studied. Bird-of-paradise flower-type nanostructures composed of AgCN nanowires having inside Ag and AgCN nanoparticles were produced in the absence of Cu super(2+) ions. The nanostructures slowly grew and transformed to AgCN nanowires with embedded Ag and AgCN nanoparticles, having a mean size of 9.7 plus or minus 3.6 nm. The presence of Cu super(2+) ions in the synthesis significantly enhanced the production of the nanostructures. Nanowires having a thickness of 63 plus or minus 33 nm and length of up to 20 mu m were produced. Cu super(2+) ions also simultaneously lead to the synthesis of ordinary free Ag nanoparticles with a bimodal size distribution (mean sizes of 9.9 plus or minus 3.9 and 65.5 plus or minus 27 nm) and a low experimental formation kinetic rate constant of 1.22 10 super(-4) s super(-1). Feasible mechanisms are presented for the origin of the AgCN nanowires, Ag and AgCN nanoparticles inside the nanowires, and for the free Ag nanoparticles. UV/Vis spectrometry was used to measure the surface plasmon resonance of the nanoparticles and the synthesis kinetic rate constant of the free Ag nanoparticles. ATR-FTIR spectroscopy, EDS-SEM, EDS-TEM, and HRTEM were used to characterize the size, crystal structure, texture, and chemical composition of the synthesis products. |
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AbstractList | The synthesis of silver nanoparticles has been investigated using Ag(CN) sub(2) super(-) species as precursor, citrate ions as reducing agent, and dodecyl sulfate ions as stabilizer, at pH 11 and 97 degree C, in a batch stirred glass reactor. The role of Cu super(2+) ions in the synthesis was also studied. Bird-of-paradise flower-type nanostructures composed of AgCN nanowires having inside Ag and AgCN nanoparticles were produced in the absence of Cu super(2+) ions. The nanostructures slowly grew and transformed to AgCN nanowires with embedded Ag and AgCN nanoparticles, having a mean size of 9.7 plus or minus 3.6 nm. The presence of Cu super(2+) ions in the synthesis significantly enhanced the production of the nanostructures. Nanowires having a thickness of 63 plus or minus 33 nm and length of up to 20 mu m were produced. Cu super(2+) ions also simultaneously lead to the synthesis of ordinary free Ag nanoparticles with a bimodal size distribution (mean sizes of 9.9 plus or minus 3.9 and 65.5 plus or minus 27 nm) and a low experimental formation kinetic rate constant of 1.22 10 super(-4) s super(-1). Feasible mechanisms are presented for the origin of the AgCN nanowires, Ag and AgCN nanoparticles inside the nanowires, and for the free Ag nanoparticles. UV/Vis spectrometry was used to measure the surface plasmon resonance of the nanoparticles and the synthesis kinetic rate constant of the free Ag nanoparticles. ATR-FTIR spectroscopy, EDS-SEM, EDS-TEM, and HRTEM were used to characterize the size, crystal structure, texture, and chemical composition of the synthesis products. |
Author | Lopez-Valdivieso, A Lopez-Miranda, A Viramontes-Gamboa, G |
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Title | Silver nanostructures from Ag(CN) sub(2) super(-) reduction by citrate ions in the presence of dodecyl sulfate and Cu super(2+) ions. Synthesis and characterization |
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