Variation in the Performance of MWCNT/ZnO Hybrid Material with pH for Efficient Antibacterial Agent

Rafique, Saima; Bashir, Shazia; Akram, Rizwan; Kayani, Farrukh Bashir; Raza, S. M. Mohsin; Hussain, Mazhar; Fatima, Sayyeda Kaneez

doi:10.1155/2022/1300157

Cited by 9 publications

(5 citation statements)

References 33 publications

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“…This similarly indicates that ion mobility is improved by disrupting the polymer chain arrangement and creating disorder in the matrix, and this may promote the faster ion dynamics in the matrix that subsequently increase the conductivity of the electrolyte [ 45 ]. Low T g has been linked to a loss in crystallinity due to the addition of a filler substance.…”

Section: Resultsmentioning

confidence: 99%

“…The Arrhenius model is a vital factor to study when dealing with the transportation of ions relative to temperature. The observed linear relationship points to a considerable phase transition in the prepared samples, signifying that the temperature dependence of the conductivity might indeed be designated by the Arrhenius model, as in Equation (2) [ 45 ]:

where E a is the activation energy, T is the absolute temperature in Kelvin (K), and σ o denotes the pre-exponential factor.…”

Section: Resultsmentioning

confidence: 99%

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Effect of ZnO Nanofiller on Structural and Electrochemical Performance Improvement of Solid Polymer Electrolytes Based on Polyvinyl Alcohol–Cellulose Acetate–Potassium Carbonate Composites

et al. 2022

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In this study, a solution casting method was used to prepare solid polymer electrolytes (SPEs) based on a polymer blend comprising polyvinyl alcohol (PVA), cellulose acetate (CA), and potassium carbonate (K2CO3) as a conducting salt, and zinc oxide nanoparticles (ZnO-NPs) as a nanofiller. The prepared electrolytes were physicochemically and electrochemically characterized, and their semi-crystalline nature was established using XRD and FESEM. The addition of ZnO to the polymer–salt combination resulted in a substantial increase in ionic conductivity, which was investigated using impedance analysis. The size of the semicircles in the Cole–Cole plots shrank as the amount of nanofiller increased, showing a decrease in bulk resistance that might be ascribed to an increase in ions due to the strong action of the ZnO-NPs. The sample with 10 wt % ZnO-NPs was found to produce the highest ionic conductivity, potential window, and lowest activation energy (Ea) of 3.70 × 10–3 Scm–1, 3.24 V, and 6.08 × 10–4 eV, respectively. The temperature–frequency dependence of conductivity was found to approximately follow the Arrhenius model, which established that the electrolytes in this study are thermally activated. Hence, it can be concluded that, based on the improved conductivity observed, SPEs based on a PVA-CA-K2CO3/ZnO-NPs composite could be applicable in all-solid-state energy storage devices.

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Section: Resultsmentioning

confidence: 99%

where E a is the activation energy, T is the absolute temperature in Kelvin (K), and σ o denotes the pre-exponential factor.…”

Section: Resultsmentioning

confidence: 99%

Effect of ZnO Nanofiller on Structural and Electrochemical Performance Improvement of Solid Polymer Electrolytes Based on Polyvinyl Alcohol–Cellulose Acetate–Potassium Carbonate Composites

et al. 2022

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“…They demonstrated that the synthesized MWCNT/ZnO composite has improved antibacterial properties against Staphylococcus aureus as the zone of inhibition test showed a maximum of 20 mm circular area. In addition, the studies also demonstrated that the antibacterial activity works best when synthesized at pH 10.0 compared to pH 6 and 7 [31].…”

Section: Figure 4 General Representation Of Antibacterial Activity By...mentioning

confidence: 87%

Recent Modifications of Carbon Nanotubes for Biomedical Applications

Hatta

Matmin²,

Ghazalli³

et al. 2023

Jurnal Teknologi

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Recent advances in the field of biomedical have been remarkably achieved in the last few years, especially in the fabrication of nanomaterials that have various applications. Carbon nanotubes (CNTs) are carbon-based materials with cylindrical shapes that have an average diameter of less than 2 nanometre (nm) for single-walled CNTs (SWCNTs) and multi-walled CNTs (MWCNTs) with average diameters up to 100 nm. CNTs demonstrate various outstanding and excellent mechanical, electrical, conductivity, thermal properties, high surface area, and high biocompatibility. These remarkable properties have led to the development of CNTs-based materials in the biomedical field. For the past decades, the functionalization of CNTs has been actively researched in order to increase their biocompatibility for application in antibacterial materials, dentistry, drug delivery, and biosensing. The surface functionalization enhances the capabilities, features, and properties by modifying the surface chemistry of CNTs to improve their biocompatibility. The functionalization of CNTs will enable the biomolecule loading on the surface of CNTs, and thus can be used for drug delivery for targeted cells or immobilization support. In this review, we discuss the related literatures on biomedical applications of CNTs such as antibacterial, dental materials, cancer therapy and biosensors from 2007 – 2022. We also review the antibacterial properties between SWCNTs and MWCNTs, functionalized CNTs-reinforced nanocomposite for dental applications, and the ability of CNTs to work as nanocarriers to deliver drugs directly to cancer cells. Moreover, the applications of CNTs-based biosensors in detecting biological and biomedical compounds are also discussed.

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“…As a result, it is assumed that the dopant is evenly distributed in the lattice of ZnO, causing no further changes in the crystal structure [25]. Additional peaks of the diffraction peaks (002) at 26 • and (100) at 43 • , corresponding to functionalized MWCNTs, were visible in the XRD spectrum of La-ZnO/MWCNTs [26].…”

Section: Morphological Elemental and Structural Analysis Of Synthesiz...mentioning

confidence: 99%

Room temperature operated flexible La-ZnO/MWCNTs sensor for ppb level carbon monoxide detection

Verma

Pandey

Islam

et al. 2023

J. Micromech. Microeng.

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Room temperature detection of toxic gases with ppb level concentration experiences profound fabrication challenges. This work introduces CO gas sensor based on the unique La-ZnO/MWCNTs composite film developed on a flexible polyimide substrate, where interdigitated electrodes (IDEs) (thickness: 300 µm and spacing: 300 µm) were prepared using a laser induced carbonization technique. The synthesized composites were characterized using SEM, EDS, XRD, FTIR, and UV-Vis techniques. When compared to the La-ZnO composite, the addition of MWCNTs on the synthesized composite-based sensor exhibited ~9.65 times higher response than La-ZnO towards 100 ppm CO at 27°C. The response of the La-ZnO/MWCNTs composite sensors to 20 ppm CO was also tested at six different relative humidity (RH) levels ranging from 0% to 90% in increments of 20% RH. These sensors had a humidity tolerant properties, as evidenced by their responses to different humidity levels. Even when exposed to 90% RH, the sensor only showed a 13.081% reduction in response compared to 0% RH, indicating that it is a humidity tolerant sensor. Furthermore, the La-ZnO/MWCNTs sensor had excellent selectivity and could detect low CO concentrations of 100 ppb. As a result, the reported high-performance flexible sensor has a lot of potential and can be envisioned for the use in wearable devices to detect trace level CO gas at room temperature.

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Variation in the Performance of MWCNT/ZnO Hybrid Material with pH for Efficient Antibacterial Agent

Cited by 9 publications

References 33 publications

Effect of ZnO Nanofiller on Structural and Electrochemical Performance Improvement of Solid Polymer Electrolytes Based on Polyvinyl Alcohol–Cellulose Acetate–Potassium Carbonate Composites

Effect of ZnO Nanofiller on Structural and Electrochemical Performance Improvement of Solid Polymer Electrolytes Based on Polyvinyl Alcohol–Cellulose Acetate–Potassium Carbonate Composites

Recent Modifications of Carbon Nanotubes for Biomedical Applications

Room temperature operated flexible La-ZnO/MWCNTs sensor for ppb level carbon monoxide detection

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