Electrocatalytic Activation of Silver Nanowires‐modified Pt Electrode by Cyclic Voltammetry in Comparison with Differential Pulse Voltammetry in Halide Determination

Qin, Xia; Miao, Zhiying; Du, Xin; Chen, Qiang

doi:10.1002/elan.201500248

Cited by 5 publications

(4 citation statements)

References 40 publications

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“…This observation is also well supported by SWCNT-AgNW-resin hybrid film when it is used as an electrode material; and the shape of the curve is non-rectangular indicating the occurrence of redox reaction in presence of electrolyte ions from Na 2 SO 4 . This can be explained by the incorporation of highly conducting SWCNTs into the hybrid film, where it is postulated that the AgNW in the composite is become ionically very active at higher conductivity in presence of SWCNT, where the redox peak indicates a pseudo-capacitance derived from different oxidation states of Ag5758. Also, the excellent current response from the CV curve of the hybrid film indicates the occurrence of efficient faradaic redox reaction at higher electrons and ions transport rate.…”

Section: Discussionmentioning

confidence: 99%

Totally embedded hybrid thin films of carbon nanotubes and silver nanowires as flat homogenous flexible transparent conductors

Pillai

Wang

et al. 2016

Sci Rep

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There is a great need for viable alternatives to today’s transparent conductive film using largely indium tin oxide. We report the fabrication of a new type of flexible transparent conductive film using silver nanowires (AgNW) and single-walled carbon nanotube (SWCNT) networks which are fully embedded in a UV curable resin substrate. The hybrid SWCNTs-AgNWs film is relatively flat so that the RMS roughness of the top surface of the film is 3 nm. Addition of SWCNTs networks make the film resistance uniform; without SWCNTs, sheet resistance of the surface composed of just AgNWs in resin varies from 20 Ω/sq to 107 Ω/sq. With addition of SWCNTs embedded in the resin, sheet resistance of the hybrid film is 29 ± 5 Ω/sq and uniform across the 47 mm diameter film discs; further, the optimized film has 85% transparency. Our lamination-transfer UV process doesn’t need solvent for sacrificial substrate removal and leads to good mechanical interlocking of the nano-material networks. Additionally, electrochemical study of the film for supercapacitors application showed an impressive 10 times higher current in cyclic voltammograms compared to the control without SWCNTs. Our fabrication method is simple, cost effective and enables the large-scale fabrication of flat and flexible transparent conductive films.

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Section: Discussionmentioning

confidence: 99%

Totally embedded hybrid thin films of carbon nanotubes and silver nanowires as flat homogenous flexible transparent conductors

Pillai

Wang

et al. 2016

Sci Rep

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“…With respect to EDL:Ag composites, it was observed that both of these processes took place. The faradaic process was observed through the presence of a characteristic Ag/Ag + redox couple [ 43 ], and the increasing mass ratio of AgNWs in the composite resulted in the expansion of the overall area under the CV curve, leading to the increase in CSC. The CSC of EDL:Ag 10:1, determined in this study, was almost 20 times higher than that of bare Pt substrates and 7 times higher than that of pristine EDL coated Pt electrodes, and was also higher than that for other previously reported biomaterial systems containing nanowires [ 44 ], indicating the high efficiency of EDL:Ag 10:1 in storing electric charge, and providing higher charges during electrical stimulation.…”

Section: Discussionmentioning

confidence: 99%

Analysis of a poly(ε-decalactone)/silver nanowire composite as an electrically conducting neural interface biomaterial

Krukiewicz

Fernández²,

Skorupa

et al. 2019

BMC biomed eng

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Background Advancement in polymer technologies, facilitated predominantly through chemical engineering approaches or through the identification and utilization of novel renewable resources, has been a steady focus of biomaterials research for the past 50 years. Aliphatic polyesters have been exploited in numerous biomedical applications including the formulation of soft-tissue sutures, bone fixation devices, cardiovascular stents etc. Biomimetic ‘soft’ polymer formulations are of interest in the design of biological interfaces and specifically, in the development of implantable neuroelectrode systems intended to interface with neural tissues. Critically, soft polymer formulations have been shown to address the challenges associated with the disregulation of mechanotransductive processes and micro-motion induced inflammation at the electrode/tissue interface. In this study, a polyester-based poly(ε-decalactone)/silver nanowire (EDL:Ag) composite was investigated as a novel electrically active biomaterial with neural applications. Neural interfaces were formulated through spin coating of a polymer/nanowire formulation onto the surface of a Pt electrode to form a biocompatible EDL matrix supported by a percolated network of silver nanowires. As-formed EDL:Ag composites were characterized by means of infrared spectroscopy, scanning electron microscopy and electrochemical methods, with their cytocompatibility assessed using primary cultures of a mixed neural population obtained from the ventral mesencephalon of Sprague-Dawley rat embryos. Results Electrochemical characterization of various EDL:Ag composites indicated EDL:Ag 10:1 as the most favourable formulation, exhibiting high charge storage capacity (8.7 ± 1.0 mC/cm 2 ), charge injection capacity (84.3 ± 1.4 μC/cm 2 ) and low impedance at 1 kHz (194 ± 28 Ω), outperforming both pristine EDL and bare Pt electrodes. The in vitro biological evaluation showed that EDL:Ag supported significant neuron viability in culture and to promote neurite outgrowth, which had the average length of 2300 ± 6 μm following 14 days in culture, 60% longer than pristine EDL and 120% longer than bare Pt control substrates. Conclusions EDL:Ag nanocomposites are shown to serve as robust neural interface materials, possessing favourable electrochemical characteristics together with high neural cytocompatibility.

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“…The results demonstrate that there is an electrochemical window wider than 1.40 V at different scanning rates, with an anodic stripping potential window lower than −0.82 V, which means that the detector is stable and suitable for iodine detection. 37 To verify the performance of the device on actual iodine samples, we investigated the sensing signals at different concentrations of iodine vapor with a wide range from 1 to 240 μM. One can see that the anodic peak current of iodine oxidation increases with increasing concentration of iodine, following a peak shift from −0.31 to −0.79 V (Figure 4C).…”

Section: An Obvious O−h•••i Hydrogen Bond Between the [Ch] + Cation A...mentioning

confidence: 96%

“…The CV curves of the IPIN-1-based electrochemical detector at various potential scan rates (a range from 10 to 500 mV s –1 ) are depicted in Figure B. The results demonstrate that there is an electrochemical window wider than 1.40 V at different scanning rates, with an anodic stripping potential window lower than −0.82 V, which means that the detector is stable and suitable for iodine detection . To verify the performance of the device on actual iodine samples, we investigated the sensing signals at different concentrations of iodine vapor with a wide range from 1 to 240 μM.…”

mentioning

confidence: 99%

Self-Healable, Malleable, and Flexible Ionic Polyimine as an Environmental Sensor for Portable Exogenous Pollutant Detection

Zhang

Zhu

et al. 2021

ACS Materials Lett.

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The development of a flexible sensing platform for potential detection of chemicals is of great importance for probing health parameters. However, the fabrication of portable flexible sensors for exogenous chemicals that are known to be harmful to human health and the environment is still a challenge. Herein we report a flexible electrochemical sensor for on-site and portable detection of the potential exogenous pollutant iodine. The sensor is manufactured from an ionic polyimine that is stretchable, self-healable, and recyclable. By regulation of the cation−anion structure of the ionic polymine, the sensor exhibits superior preconcentration capacity and achieves accurate monitoring of iodine with a low detection limit. On the basis of the ductility and flexibility of the sensor material, an integrated wearable sensor with the functions of on-site detection and real-time alarm was prepared using a visual program. We believe that such a flexible, repairable, and malleable sensing device leads to a promising strategy of implanting it into wearable electronics, thereby realizing real-time detection and alarm of exogenous hazardous chemicals.

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Electrocatalytic Activation of Silver Nanowires‐modified Pt Electrode by Cyclic Voltammetry in Comparison with Differential Pulse Voltammetry in Halide Determination

Cited by 5 publications

References 40 publications

Totally embedded hybrid thin films of carbon nanotubes and silver nanowires as flat homogenous flexible transparent conductors

Totally embedded hybrid thin films of carbon nanotubes and silver nanowires as flat homogenous flexible transparent conductors

Analysis of a poly(ε-decalactone)/silver nanowire composite as an electrically conducting neural interface biomaterial

Self-Healable, Malleable, and Flexible Ionic Polyimine as an Environmental Sensor for Portable Exogenous Pollutant Detection

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