Open Source Automated Flow Analysis Instrument for Detecting Arsenic in Water

Gutiérrez, Julián; Mochen, Juan Pablo; Eggly, Gabriel; Pistonesi, Marcelo Fabián; Santos, Rodrigo

doi:10.1016/j.ohx.2022.e00284

Cited by 2 publications

(1 citation statement)

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“…Glass chamber, provided with magnetic stirring and sealed with a polylactic acid pressure cap, contains six inlets for reagents addition and one outlet to remove waste as shown in Figure 1. The solutions used for the synthesis of silver nanoparticles were supplied to GC at a regulated flow rate using a home‐made peristaltic pump (PP) accordingly to Gutiérrez et al [12c] . and Tygon® pumping tubes.…”

Section: Resultsmentioning

confidence: 99%

{111}‐ Faceted Silver Nanoplates: An Automated and Customized Design for Functionality

Pistonesi,

Belén,

Centurion

et al. 2023

ChemNanoMat

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Silver nanoparticles (Ag‐NPs) exhibit the highest efficiency of localized surface plasmon resonance (LSPR) excitation that can be tuned to any wave length in the visible spectrum. Its performance depends to a large extent on its physicochemical characteristics such as size and shape; which, in turn, can be modulated by the selective growth of their crystalline facets. We used a simple direct chemical reduction method with a precise manipulation of seed‐mediated growth control through an automated single‐phase continuous flow‐batch system to induce customized geometries on Ag‐NPs. Optimization of the experimental design was carried out from a multivariate analysis, where the height / width ratio of LSPR band was used as response signal. Proposed methodology controls the critical steps in the synthesis of Ag‐NPs that modulate their morphology to attain customized surface plasmon resonance in an interval of 380 nm (spherical‐shaped nanoparticles) to 925 nm ({111}‐ faceted prism‐shaped nanoplates) absorptions, leading to a versatile platform to extend their potential applications. Although the present work focused on silver nanoparticles, we believe that this methodology can be extended to any free‐electron metals.

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Section: Resultsmentioning

confidence: 99%