Effect of the Dispersing Agent on the Electrochemical Response of Glassy Carbon Electrodes Modified with Dispersions of Carbon Nanotubes

González-Segura, Karina; Cañete-Rosales, Paulina; Río, Rodrigo Del; Yáñez, Claudia; Ferreyra, Nancy F.; Rivas, Gustavo A.; Bollo, Soledad

doi:10.1002/elan.201200505

Cited by 14 publications

(11 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This current increase could be attributed to a better coupling between the components of the hybrid product of in situ synthesis and a better distribution of CTO on the graphitic material, resulting in improved electroactivity. As in previous reports [73,74], there were regions with different electroactivity, probably due to a non-homogeneous dispersion of hybrids that generate areas with dissimilar concentrations on the electrode surface.…”

Section: Resultssupporting

confidence: 67%

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

et al. 2019

Self Cite

View full text Add to dashboard Cite

For the first time, the synthesis, characterization, and analytical application for hydrogen peroxide quantification of the hybrid materials of Co2TiO4 (CTO) and reduced graphene oxide (RGO) is reported, using in situ (CTO/RGO) and ex situ (CTO+RGO) preparations. This synthesis for obtaining nanostructured CTO is based on a one-step hydrothermal synthesis, with new precursors and low temperatures. The morphology, structure, and composition of the synthesized materials were examined using scanning electron microscopy, X-ray diffraction (XRD), neutron powder diffraction (NPD), and X-ray photoelectron spectroscopy (XPS). Rietveld refinements using neutron diffraction data were conducted to determine the cation distributions in CTO. Hybrid materials were also characterized by Brunauer–Emmett–Teller adsorption isotherms, Scanning Electron microscopy, and scanning electrochemical microscopy. From an analytical point of view, we evaluated the electrochemical reduction of hydrogen peroxide on glassy carbon electrodes modified with hybrid materials. The analytical detection of hydrogen peroxide using CTO/RGO showed 11 and 5 times greater sensitivity in the detection of hydrogen peroxide compared with that of pristine CTO and RGO, respectively, and a two-fold increase compared with that of the RGO+CTO modified electrode. These results demonstrate that there is a synergistic effect between CTO and RGO that is more significant when the hybrid is synthetized through in situ methodology.

show abstract

Section: Resultssupporting

confidence: 67%

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The latter show areas with different electroactivities, revealing the existence of variation in the MWNT amount on the surfaces. This result is in agreement with our previously reported work where chitosan was used as the MWNT dispersing agent [11,19].…”

Section: Resultssupporting

confidence: 95%

A comparative study of electrochemical performances of carbon nanomaterial-modified electrodes for DNA detection. Nanotubes or graphene?

Báez

Bollo

2015

J Solid State Electrochem

Self Cite

View full text Add to dashboard Cite

Artículo de publicación ISIA comparative study about the electrochemical response of glassy carbon electrode modified with four different carbon nanomaterial (CNM) against dsDNA is reported. The CNM used were oxidized and nonoxidized multiwalled carbon nanotubes (MWNT-OX and MWNT, respectively), graphene oxide (GO) and chemically reduced graphene oxide (RGO) and dispersed in 3:1 chitosan/water mixture. The electrodes were characterized by cyclic voltammetry, scanning electrochemical microscopy, and contact angle measurements. The results showed that the type and degree of oxidation have a strong effect on the electroactivity of the modified electrode. GCE/RGO clearly exhibited the most electroactive surface among the CNMs, demonstrating that the graphitic structure is highly important. A more sensitive electrochemical response against dsDNA was obtained when GCE/RGO electrode was used. Therefore, RGO is the CNM recommended for further consideration in the development of DNA biosensors.National Fund for Scientific and Technological Development-CHILE FONDECYT 1120246 FONDAP 15130011 Chile's National Commission for Scientific and Technological Research (CONICYT

show abstract

“…The effect of adding water can cause particle agglomerations, but their effect on the piezoresistive property is uncertain, with conflicting results reported in [45] and [46]. The use of dispersants to minimize agglomerations may produce a decrease of mechanical properties [47] and sensitivity by modifying electrical characteristics [48]. Lastly, the use of plasticizers may yield noisy signals [47,49].…”

Section: Introductionmentioning

confidence: 99%

Smart Graphite–Cement Composite for Roadway-Integrated Weigh-In-Motion Sensing

Birgin

D’Alessandro

Laflamme

et al. 2020

Sensors

View full text Add to dashboard Cite

Smart multifunctional composites exhibit enhanced physical and mechanical properties and can provide structures with new capabilities. The authors have recently initiated a research program aimed at developing new strain-sensing pavement materials enabling roadway-integrated weigh-in motion (WIM) sensing. The goal is to achieve an accurate WIM for infrastructure monitoring at lower costs and with enhanced durability compared to off-the-shelf solutions. Previous work was devoted to formulating a signal processing algorithm for estimating the axle number and weights, along with the vehicle speed based on the outputs of a piezoresistive pavement material deployed within a bridge deck. This work proposes and characterizes a suitable low-cost and highly scalable cement-based composite with strain-sensing capabilities and sufficient sensitivity to meet WIM signal requirements. Graphite cement-based smart composites are presented, and their electromechanical properties are investigated in view of their application to WIM. These composites are engineered for scalability owing to the ease of dispersion of the graphite powder in the cement matrix, and can thus be used to build smart sections of road pavements. The research presented in this paper consists of electromechanical tests performed on samples of different amounts of graphite for the identification of the optimal mix in terms of signal sensitivity. An optimum inclusion level of 20% by weight of cement is obtained and selected for the fabrication of a plate of 30 × 15 × 5 cm3. Results from load identification tests conducted on the plate show that the proposed technology is capable of WIM.

show abstract

Effect of the Dispersing Agent on the Electrochemical Response of Glassy Carbon Electrodes Modified with Dispersions of Carbon Nanotubes

Cited by 14 publications

References 30 publications

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

Co2TiO4/Reduced Graphene Oxide Nanohybrids for Electrochemical Sensing Applications

A comparative study of electrochemical performances of carbon nanomaterial-modified electrodes for DNA detection. Nanotubes or graphene?

Smart Graphite–Cement Composite for Roadway-Integrated Weigh-In-Motion Sensing

Contact Info

Product

Resources

About