Visible luminescence in polyaniline/(gold nanoparticle) composites

Santos, Raira Feitosa dos; Andrade, César A.S.; Santos, C.G. dos; Melo, Celso P. de

doi:10.1007/s11051-012-1408-1

Cited by 13 publications

(7 citation statements)

References 47 publications

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“…This is can be explained based on the protonation and deprotonation of the amino groups at the PANI surface. It is proposed that the benzenoid rings are responsible for the fluorescence while at low pH the PANI is protonated and the conductive (quinoid rings) regions act as a fluorescence quencher 23 . Moreover, at low pH the aggregation of PANI/Ag (AMPSA)/GO QDs is manifested by the action of intramolecular hydrogen bond of the carboxylic acid moieties existed onto the surface of the PANI/Ag (AMPSA)/GO QDs 24 , 25 .…”

Section: Resultsmentioning

confidence: 99%

Polyaniline/Ag nanoparticles/graphene oxide nanocomposite fluorescent sensor for recognition of chromium (VI) ions

Ebrahim

Shokry

Khalil

et al. 2020

Sci Rep

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Selective determination of toxic hexavalent chromium (Cr(VI)) is a stringent important due to its huge negative impact on the health and environment. Recently, the high sensitivity, rapidness, and cost-effectiveness of the fluorescent sensors for Cr(VI) have been developed. A fluorescent nanocomposite (NC) has been synthesized based on doped polyaniline (PANI), 2-acrylamido-2-methylpropanesulfonic acid (AMPSA) capped Ag nanoparticles (NPs) and graphene oxide (GO) quantum dots (QDs) via in situ reaction for highly selective sensing of Cr(VI) ions based on the luminescent quenching in the range from 0.01 to 7.5 mg/L. This NC showed an emission peak at 348 nm with a linear range from 0.01 to 0.05 mg/L and the low limit of detection (LOD) was 0.0065 mg/L (~ 6 µg/L). PANI/Ag (AMPSA) GO QDs NC displayed high selectivity for Cr(VI) over other common metal ions. Notably, the PANI/Ag (AMPSA) GO QDs NC can be used for distinguishing Cr(VI) and Cr(III) in solutions. The sensitive determination of Cr(VI) in real surface water samples was also confirmed and demonstrated recoveries in the range 95.3–99.2%. This NC will emerge as a new class of fluorescence materials that could be suitable for practical applications.

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Section: Resultsmentioning

confidence: 99%

Polyaniline/Ag nanoparticles/graphene oxide nanocomposite fluorescent sensor for recognition of chromium (VI) ions

Ebrahim

Shokry

Khalil

et al. 2020

Sci Rep

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“…Imine deformation (C-N-C bending) and quinone ring deformation were observed at 730 and 799 cm −1 , respectively, in all cases [9,24]. The peaks at 600 and 1026 cm −1 were associated with in-plane deformation vibrations of aniline groups of bipolaronic structure of PANI and in-plane bending of C-H of aromatic rings, respectively [7,9].…”

Section: Ftir Characterization Of Pani and Aunp/pani Compositesmentioning

confidence: 87%

“…Gold nanoparticles (AuNPs) are among the more promising materials that have been explored to enhance the properties of PANI. AuNPs used during the synthesis of PANI have been highly useful in elevating the yield (e.g., from 0.01% to 10%) of PANI [7].…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Effective Alteration of Morphological Features of Polyaniline through Interfacial Polymerization for Versatile Applications

et al. 2020

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Morphological characteristics of any nanomaterial are critical in defining its properties. In this context, a method to control morphological parameters of polyaniline (PANI) has been investigated by producing its composite with gold nanoparticles (AuNPs). Herein, we report for the first time the successful control on the physical/chemical properties of PANI composites synthesized via interfacial polymerization through functionalization of its AuNP composite component with citrate, ascorbate, glutathione (GSH), and cetyl trimethyl ammonium bromide (CTAB). A significant difference in the polymerization pattern, morphologies, and electrical properties was recognized in these composites according to the functionality of the modified AuNPs. The obtained composites of AuNPs/PANI exhibited highly diverse morphologies (e.g., nodule, hollow hemisphere, flake, and spider-web galaxy type) and electrical characteristics according to functionalization. Hence, this study is expected to offer better insight into control of the polymerization pattern of AuNP/PANI composites and their associated properties.

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“…These nanostructures possess excellent electrical properties to fabricate different devices such as sensors and capacitors because of excellent catalytic activities, optical and electrical properties and unique morphology in controlled conditions [15]. Many noble metals, such as gold, platinum, cadmium etc., have been incorporated into the conjugated polymers [16][17][18]. Among them, silver has received much attention due to its high conductivity value, as high as 5.6 × 10 5 S/cm at room temperature and the fact that it is relatively cheaper than any other metal.…”

Section: Introductionmentioning

confidence: 99%

Structural and electrical properties of new core-shell silver poly(m-toluidine-co-2-bromoaniline) nanocomposites

Mahudeswaran¹,

Jeeva²,

Chandrasekaran

et al. 2019

Materials Science-Poland

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In this article, we report the synthesis and characterization of silver dispersed poly(m-toluidine-co-2-bromoaniline) copolymer synthesized by chemical oxidative polymerization method. The synthesized copolymer composites were subjected to different analytical characterization methods, such as FT-IR, UV, XRD, SEM, photoluminescence and electrical conductivity studies. All the polymer samples are found to be soluble in common organic solvents. UV absorption spectra show a red shift when silver nanoparticles are dispersed in the copolymer. The characteristic peaks observed in FT-IR spectra confirm the formation of the copolymer. XRD pattern reveals the crystalline nature of the copolymer composites and sharp peaks in the spectra confirm the presence of silver particles. The silver nanoparticles change the surface morphology in the form of perfect encapsulation. The electrical conductivity of the polymer composites is found to vary from 10−4 S/cm to 10−6 S/cm. PL study reveals the charge transfer between the copolymer and the silver particles.

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Visible luminescence in polyaniline/(gold nanoparticle) composites

Cited by 13 publications

References 47 publications

Polyaniline/Ag nanoparticles/graphene oxide nanocomposite fluorescent sensor for recognition of chromium (VI) ions

Polyaniline/Ag nanoparticles/graphene oxide nanocomposite fluorescent sensor for recognition of chromium (VI) ions

A Novel Approach for Effective Alteration of Morphological Features of Polyaniline through Interfacial Polymerization for Versatile Applications

Structural and electrical properties of new core-shell silver poly(m-toluidine-co-2-bromoaniline) nanocomposites

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