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Methods Protoc. 2019, 2(1), 3; https://doi.org/10.3390/mps2010003

Synthesis of Highly Concentrated Suspensions of Silver Nanoparticles by Two Versions of the Chemical Reduction Method

Department of Bioengineering and Chemical Engineering, Universidad de Ingenieria y Tecnologia—UTEC, Jr. Medrano Silva 165, Barranco, Lima 15063, Peru
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Received: 24 November 2018 / Revised: 20 December 2018 / Accepted: 20 December 2018 / Published: 24 December 2018
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Abstract

In spite of the widespread use of the chemical reduction method to obtain silver nanoparticles, the nanoparticle yield is often low due to a required addition of small volumes of diluted metal ions to a solution containing a reducer. Higher yields can be obtained following an alternative method, in which the reducer is added to a greater volume of silver ions in the solution. In this study, protocols for both methods are detailed and compared, using characterization tools such as UV-vis spectrometry, dynamic light scattering (DLS), and zeta potential measurements. By using this alternative method, the amount of silver in the solution is three times greater, and nanoparticles with a narrower size distribution are formed (between 6 and 70 nm in size). In contrast, the regular method produces particles of 3 and 100 nm. Zeta potential measurements indicate that the nanoparticles synthesized with the alternative method will be more stable than those from the regular method. View Full-Text
Keywords: Silver nanoparticles; UV-VIS spectrometry; dynamic light scattering; Frens method Silver nanoparticles; UV-VIS spectrometry; dynamic light scattering; Frens method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Gakiya-Teruya, M.; Palomino-Marcelo, L.; Rodriguez-Reyes, J.C.F. Synthesis of Highly Concentrated Suspensions of Silver Nanoparticles by Two Versions of the Chemical Reduction Method. Methods Protoc. 2019, 2, 3.

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