Investigation of cyclic voltammetry of graphene oxide/polyaniline/polyvinylidene fluoride nanofibers prepared via electrospinning

Rose, Aleena; Raghavan, Nivea; Thangavel, S.; Maheswari, B. Uma; Nair, Devika P; Venugopal, Gunasekaran

doi:10.1016/j.mssp.2014.10.051

Cited by 46 publications

(15 citation statements)

References 26 publications

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“…However, compared to other graphene‐based films, the current magnitude was relatively low mainly due to the low intrinsic conductivity of the LCGO component of the nanocomposite given that it was not reduced . LCGO–AuNR/Gold Mylar shows two oxidation peaks (I' and II'), which were both reversible as shown by the presence of corresponding reduction peaks III' and IV', respectively . Redox peaks at similar potential values (I, II, II,I and IV) were observed in LCGO (Figure b).…”

Section: Resultsmentioning

confidence: 96%

Fabrication of a Biocompatible Liquid Crystal Graphene Oxide–Gold Nanorods Electro‐ and Photoactive Interface for Cell Stimulation

Duc

Stoddart

McArthur

et al. 2019

Adv Healthcare Materials

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For decades, electrode–tissue interfaces are pursued to establish electrical stimulation as a reliable means to control neuronal cells behavior. However, spreading of electrical currents in tissues limits its spatial precision. Thus, optical cues, such as near‐infrared (NIR) light, are explored as alternatives. Presently, NIR stimulation requires higher energy input than electrical methods despite introduction of light absorbers, e.g., gold nanoparticles. As potential solution, NIR and electrical costimulation are proposed but with limited interfaces capable of sustaining this stimulation technique. Here, a novel electroactive nanocomposite with photoactive properties in the NIR range is constructed by N‐(3‐dimethylaminopropyl)‐N′‐ethylcarbodiimide hydrochloride/N‐hydroxysulfosuccinimide sodium (EDC)/NHS conjugation of liquid crystal graphene oxide (LCGO) to protein‐coated gold nanorods (AuNR). The liquid crystal graphene oxide–gold nanorod nanocomposite (LCGO–AuNR) is fabricated into a hydrophilic electrode‐coating via drop‐casting, making it appropriate for versatile electrode–tissue interface fabrication. UV–vis spectrophotometry results demonstrate that LCGO–AuNR presents an absorbance peak at 798 nm (NIR range). Cyclic voltammetry measurements further confirm its electroactive capacitive properties. Furthermore, LCGO–AuNR coating supports cell adhesion, proliferation, and differentiation of NG108‐15 neuronal cells. This biocompatible interface is anticipated, with ideal electrical and optical properties for NIR and electrical costimulation, to enable further development of the technique for energy‐efficient and precise neuronal cell modulation.

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Section: Resultsmentioning

confidence: 96%

Fabrication of a Biocompatible Liquid Crystal Graphene Oxide–Gold Nanorods Electro‐ and Photoactive Interface for Cell Stimulation

Duc

Stoddart

McArthur

et al. 2019

Adv Healthcare Materials

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“…The PVA‐GQD/PEDOT exhibits a high E ranged from 15.62 to 17.51 Wh/kg and excellent specific power ranged from 495.87 to 2413.71 W/kg as the current density increases from 1.0 to 5.0 A/g. The E and P in this work are much higher compared with the reported literature . In addition, a small decrease in E as the current density increases indicates that the PVA‐GQD/PEDOT has excellent capacitive performance, which demonstrates an ideal supercapacitor.…”

Section: Resultsmentioning

confidence: 56%

Fabrication of poly(vinyl alcohol)‐graphene quantum dots coated with poly(3,4‐ethylenedioxythiophene) for supercapacitor

Abidin

Mamat

Rasyid

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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Conducting nanofiber composed of poly(vinyl alcohol) (PVA), graphene quantum dots (GQDs) and poly(3,4-ethylenedioxythiophene) (PEDOT) was prepared for symmetrical supercapacitor through electrospinning and electropolymerization techniques. The formation of PVA nanofibers with the addition of GQDs was excellently prepared with the average diameter of 55.66 6 27 nm. Field emission scanning electron microscopy images revealed that cauliflower-like structure of PEDOT was successfully coated on PVA-GQD electrospun nanofibers. PVA-GQD/PEDOT nanocomposite exhibited the highest specific capacitance of 291.86 F/g compared with PVA/ PEDOT (220.73 F/g) and PEDOT (161.48 F/g). PVA-GQD/PEDOT also demonstrated a high specific energy and specific power of 16.95 and 984.48 W/kg, respectively, at 2.0 A/g current density. PVA-GQD/PEDOT exhibited the lowest resistance of charge transfer (R ct ) and equivalent series resistance compared with PEDOT and PVA/PEDOT, indicating that the fast ion diffusion between the electrode and electrolyte interface. PVA-GQD/ PEDOT nanocomposite also showed an excellent stability with retention of 98% after 1000 cycles.

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“…To overcome this issue, recently we have proposed an alternative approach consisting in the oxidative polymerization of AD, a commercially available material. The use of AD allows to replace hard oxidants with greener chemicals (molecular oxygen or hydrogen peroxide) in the presence of proper catalysts . Herein, we report the optimization of the reaction conditions for the oxidative polymerization of AD using H 2 O 2 and Fe +3 as the oxidant and catalyst respectively, to achieve PANI in its conducting form (ES) with high yields.…”

Section: Resultsmentioning

confidence: 99%

Ultrathin electrospun PANI nanofibers for neuronal tissue engineering

Castagna

Tunesi

Saglio

et al. 2016

J of Applied Polymer Sci

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N-(4-aminophenyl)aniline oxidative polymerization is optimized to produce polyaniline (PANI) free from carcinogenic and/or polluting coproducts. The resulting polymer is electrospun using polymethyl methacrylate (PMMA) as the supporting polymer, with different weight ratios (1:0, 4:1, 3:1, 2:1, 1:1, and 0.5:1 w/w PANI/PMMA). By rinsing with a selective solvent, PMMA is removed while maintaining the fibrous morphology. Ultrathin (65 6 14 nm) and defect-free PANI nanofiber mats are obtained for the blend containing a high relative content of PANI (2:1 w/w, namely F 2:1 ). Two different solvents are tested to remove PMMA, namely acetone and isopropanol, the former giving better results, as highlighted by infrared spectroscopy (FTIR). X-ray diffraction (XRD) demonstrates that the electrospun PANI is amorphous. The thin fiber mats are robust and sterilization both by autoclave and UV irradiation can be carried out. UV irradiation is preferred since no modification of the fibrous morphology is detectable. In vitro biocompatibility of the electrospun F 2:1 fibers has been evaluated with SH-SY5Y neuronal-like cells. Indirect cytocompatibility tests show that no cytotoxic leachable is released by the electrospun mats at both short and longer times, while direct cytocompatibility investigations indicate that only F 2:1 fibers washed in isopropanol do not reduce cell proliferation rate with respect to controls on tissue culture plates. Globally, these results suggest that the proposed electrospun nanostructures are promising materials for neuronal tissue engineering.

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Investigation of cyclic voltammetry of graphene oxide/polyaniline/polyvinylidene fluoride nanofibers prepared via electrospinning

Cited by 46 publications

References 26 publications

Fabrication of a Biocompatible Liquid Crystal Graphene Oxide–Gold Nanorods Electro‐ and Photoactive Interface for Cell Stimulation

Fabrication of a Biocompatible Liquid Crystal Graphene Oxide–Gold Nanorods Electro‐ and Photoactive Interface for Cell Stimulation

Fabrication of poly(vinyl alcohol)‐graphene quantum dots coated with poly(3,4‐ethylenedioxythiophene) for supercapacitor

Ultrathin electrospun PANI nanofibers for neuronal tissue engineering

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