Developing a CNT-SPE Sensing Platform Based on Green Synthesized AuNPs, Using Sargassum sp.

Abstract

Detection and quantification of diverse analytes such as molecules, cells receptor and even particles and nanoparticles, play an important role in biomedical research, particularly in electrochemical sensing platform technologies. In this study, gold nanoparticles (AuNPs) prepared by green synthesis from Sargassum sp. were characterized using ultraviolet-visible (UV-Vis) and Fourier transform-infrared (FT-IR) spectroscopies, X-ray diffraction (XRD), scanning electron microscopy (SEM), dynamic light scattering (DLS) and zeta potential (ζ) obtaining organic capped face-centered cubic 80–100 nm AuNPs with an excellent stability in a wide range of pH. The AuNPs were used to modify a carbon nanotubes-screen printed electrode (CNT-SPE), through the drop-casting method, to assemble a novel portable electrochemical sensing platform for glucose, using a novel combination of components, which together have not been employed. The ability to sense and measure glucose was demonstrated, and its electrochemical fundamentals was studied using cyclic voltammetry (CV). The limits of detection (LOD) and quantification (LOQ) to glucose were 50 μM and 98 μM, respectively, and these were compared to those of other sensing platforms.

Sargassum Influx on the Mexican Coast: A Source for Synthesizing Silver Nanoparticles with Catalytic and Antibacterial Properties

“…Also present at 873 cm −1 is the one-band product of C-H bending. These results suggest the involvement of phenolic compounds and polysaccharides in the synthesis of nanoparticles, as has been previously reported [30].…”

“…Also present at 873 cm −1 is the one-band product of C-H bending. These results suggest the involvement of phenolic compounds and polysaccharides in the synthesis of nanoparticles, as has been previously reported [30]. Figure 7 shows the FTIR spectra of the ethanol-water Sargassum extract and AgNPs-S. As can be seen, both signals are similar.…”

“…The Sargassum used in this work was collected from the Mexican Caribbean coast. Previous studies indicate that the Sargassum arriving in this region is a mixture of two species: Sargassum natans and Sargassum fluitans [29,30]. Analytical-grade AgNO 3 was used as the precursor salt for the synthesis of AgNPs.…”

A Review of a Decade of Local Projects, Studies and Initiatives of Atypical Influxes of Pelagic Sargassum on Mexican Caribbean Coasts

“…Sargassum aqueous extracts for electrocatalysts and the synthesis of platinum, gold and silver nanoparticles that can be used in the construction of electrochemical glucose sensing platforms, in the catalytic activity for blue methylene degradation and as antibacterials for Staphylococcus aureus and Pseudomonas aeruginosa) [85][86][87][101][102][103] Bioremediation and purification mechanisms Effectiveness of a Sargassum-based bioremediation system for the removal of metal ions and toxic dyes in water [104] 3.2.6. Regulations and Other Strategic Lines…”

Sequential Injection Amperometric System Coupling with Bioreactor for In-Line Glucose Monitoring in Cell Culture Application

“…Some sensors have been applied to cell culture as shown in Table 1 . Moreover, a couple of studies have reported the modification of glucose sensors advanced from a commercially available screen-printed electrode (SPE) [ 21 , 22 ].…”