Hybrid composite material based on polythiophene derivative nanofibers modified with gold nanoparticles for optoelectronics applications

Sanfelice, Rafaela C.; Mercante, Luiza A.; Pavinatto, Adriana; Tomázio, Nathália B.; Mendonça, Cleber Renato; Ribeiro, Sidney J. L.; Mattoso, Luiz H. C.; Corrêa, Daniel S.

doi:10.1007/s10853-016-0481-8

Cited by 40 publications

(15 citation statements)

References 59 publications

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“…Over the past decades there has been extensive interest in developing metal nanoparticles (MNPs) as effective devices for catalysis [1][2][3], optoelectronics [4,5], surface enhanced Raman scattering [6,7], biological labeling [8], chemical [9] or biosensors [10] and drug delivery [11,12] applications [13]. Most of these properties depend on their size, shape, crystalline structure and surface functionalization [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of controlled size gold and silver nanoparticles using antioxidant as capping and reducing agent

Khan

Ahmad

Koivisto

et al. 2020

Colloid and Interface Science Communications

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Here silver (GA-AgNPs) and gold nanoparticles (GA-AuNPs) were synthesized by an ecofriendly method using antioxidant, gallic acid (GA) simultaneously as capping and reducing agent. Their size ranged between 15 nm and 80 nm, which was controlled or dependent on the feeding ratio of GA. There was a linear relationship between the particle sizes versus the GA content. Moreover, they indicated a negative zeta potential value, which was decreased from −33 mV to −40 mV for AgNPs and from −36 mV to −42 mV for AuNPs after the addition of GA. In a typical PEGylation reaction of them, resulted into a large increase in the particle size as well as zeta potential value. The cytotoxicity assay against human fibroblast cell line (WI-38) for 24 h and 3-days showed that they were completely safe toward these cells. Therefore, these engineered NPs could be considered promising supplementary targeting materials in future.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of controlled size gold and silver nanoparticles using antioxidant as capping and reducing agent

Khan

Ahmad

Koivisto

et al. 2020

Colloid and Interface Science Communications

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“…This is due to incomplete solvent evaporation as well as the collected fibers stuck to the collector. 18…”

Section: Resultsmentioning

confidence: 99%

Formulation and Physicochemical Characterization of Cyclosporine Microfiber by Electrospinning

et al. 2019

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Purpose: The objective of this study was to improve the permeability and water solubility rate of a poor water soluble drug, cyclosporine A (CsA). Methods: In order to improve the drug dissolution rate and oral bioavailability, electrospinning method was used as an approach to prepare. The fibers were evaluated for surface morphology, thermal characterizations, drug crystallinity, in vitro drug release and in vivo bioavailability studies. Results: Scanning electron microscope (SEM) results confirmed that the fibers were in microsize range and the size of the fibers was in the rang of 0.2 to 2 micron. Differential scanning calorimetry (DSC) and powder X-ray diffractometry (XRPD) analysis ensured that the crystalline lattice of drug were weakened or destroyed in the fibers. The drug release was 15.28%, 20.67%, and 32.84% from pure drug, fibers of formulation B, and formulation A, respectively. In vivo study results indicated that the bioavailability parameters of the optimized fiber formulation were improved and the maximum concentration (Cmax) were significantly higher for fibers (3001 ng/mL) than for pure drug (2550 ng/mL). The dissolution rate of the formulations was dependent on the nature and ratio of drug to carriers. Conclusion: The physicochemical properties showed that the optimized mixture of polyethylene glycol (PEG) and povidone (PVP) fibers could be an effective carrier for CsA delivery. PEG and PVP fibers improved the absolute bioavailability and drug dissolution rate with appropriate physicochemical properties.

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“…PMMA was used as the polymer matrix for developing the electrospun nanofibers due to its suitable features for electrospinning, which include ease of production of net and doped nanofibers (with other types of polymers), low cost and high optical transparency in the UV–vis region. Figure (a,b) shows the SEM images of PMMA and PMMA_0.5%PFO nanofibers, respectively and the size distribution of nanofibers diameters.…”

Section: Resultsmentioning

confidence: 99%

Optical sensor based on fluorescent PMMA/PFO electrospun nanofibers for monitoring volatile organic compounds

Terra

Sanfelice²,

Valente³

et al. 2017

J of Applied Polymer Sci

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The development of polymeric materials with superior electrical and/or optical properties is highly demanded for designing optical gas sensors, where conjugated polymers play an important role due to their p-electron conjugation. However, usually the low processability and high cost of these materials hinder technological applications. Here we report on a simple route to develop highly fluorescent electrospun nanofibers of poly(methyl methacrylate) (PMMA) containing low contents of polyfluorene (PFO). The PMMA_PFO nanofibers were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis, while the luminescence properties changes were evaluated by exposing the PMMA_PFO nanofibers to distinct volatile organic compounds (VOCs) including ethanol, toluene, tetrahydrofuran, acetone, dichloromethane, and chloroform. The changes in luminescence properties, specifically fluorescence quenching, of PMMA_PFO nanofibers were analyzed in terms of conformational changes from glassy-phase to b-phase of PFO when the nanofibers were exposed to the VOCs. The developed nanostructured platform showed a suitable response to detect chloroform, with linear responses in the concentration range from 10 to 300 ppm and from 350 to 500 ppm and limits of detection of 47.9 and 15.4 ppm, respectively. The results suggest the PMMA_PFO electrospun nanofibers are highly potential materials for optical gas sensor applications based on luminescence quenching. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46128.

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Hybrid composite material based on polythiophene derivative nanofibers modified with gold nanoparticles for optoelectronics applications

Cited by 40 publications

References 59 publications

Green synthesis of controlled size gold and silver nanoparticles using antioxidant as capping and reducing agent

Green synthesis of controlled size gold and silver nanoparticles using antioxidant as capping and reducing agent

Formulation and Physicochemical Characterization of Cyclosporine Microfiber by Electrospinning

Optical sensor based on fluorescent PMMA/PFO electrospun nanofibers for monitoring volatile organic compounds

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