Surface functionalization effects on structural, conformational, and optical properties of polyaniline nanofibers

Borah, Rajiv; Banerjee, Somik; Kumar, Ashok

doi:10.1016/j.synthmet.2014.08.018

Cited by 62 publications

(38 citation statements)

References 36 publications

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“…32 The broad band at 3200 cm À1 corresponds to the overlap of C-H stretching, the deformation of the benzenoid structure, and the stretching vibration of the N-H bonds. This broad band clearly revealed the emeraldine base form of PANi.…”

Section: Structure and Thermal Studymentioning

confidence: 99%

Polyaniline-modified nanocellulose prepared from Semantan bamboo by chemical polymerization: preparation and characterization

et al. 2017

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Crystalline nanocellulose was prepared from Semantan bamboo (Gigantochloa scortechinii) via acid hydrolysis and was used to synthesize a nanocomposite of polyaniline/crystalline nanocellulose (PANi/CNC) via in situ oxidative polymerization of aniline in the presence of crystalline nanocellulose. The electrochemical properties of the nanocomposite were studied using a modified PANi/CNC electrode via cyclic voltammetry, and higher current response was observed for the PANi/CNC-modified electrode compared to that for the modified electrode with PANi. The results obtained from EIS displayed lower value of R ct for the PANi/CNCmodified electrode, indicating that the incorporation of CNC into the PANi structure could enhance the electron transfer rate. The characteristic peaks of PANi and CNC were observed in the FTIR spectra of the nanocomposite, indicating the incorporation of CNC inside the nanocomposite structure. Moreover, in the XRD diffractogram, lower crystallinity was observed at the 2 theta values of 22.6 and 16.1 for PANi/CNC compared to that for pure CNC. The FESEM images showed high porosity of the nanostructure with no phase separation, revealing the homogenous polymerization of the monomer on the surface of the crystalline cellulose. Aggregation of PANi particles was observed with the increasing aniline concentration.

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Section: Structure and Thermal Studymentioning

confidence: 99%

Polyaniline-modified nanocellulose prepared from Semantan bamboo by chemical polymerization: preparation and characterization

et al. 2017

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“…Surface modification of organic materials such as PANI is easier compared to inorganic nanomaterials [48]. Biological interactions between antibodies (which covalently bind to PANI via surface functionalization) and target proteins can be quantified directly based on variations of conductance, capacitance, or impedance.…”

Section: Conducting Polymer Nanowirementioning

confidence: 99%

Progression in sensing cardiac troponin biomarker charge transductions on semiconducting nanomaterials

Fathil

Arshad

Ruslinda

et al. 2016

Analytica Chimica Acta

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“…The relative intensities of the peaks, however, suggest that the benzenoid units are dominating the quinoid units in SF-PNFs. 22 The enhancement in photoluminescence intensity aer surface functionalization is ascribed to the increased number of benzenoid-like units in the polymer chain due to partial reduction at the imine sites as well as incorporation of functional oxygenated species like CHO and OH in the polymer by functionalization of glutaraldehyde through graing as shown in Fig. 5.…”

Section: Spectroscopic Analysismentioning

confidence: 99%

“…Mattioli-Belmonte et al were the rst to demonstrate that this polymer is biocompatible in vitro and in vivo. 22 This current research has been devoted to the incorporation of bioactivity to these synthetic materials' surfaces so that they can interact intentionally with biological environments and inuence the cell functions. 4,8 Although the biocompatibility of PAni has been reported earlier, we have reported here a simple method of polyaniline nanober (PNF) surface functionalization by glutaraldehyde postpolymerization, similar to what we reported in our earlier results.…”

Section: Introductionmentioning

confidence: 99%

Surface functionalization-induced enhancement in surface properties and biocompatibility of polyaniline nanofibers

et al. 2015

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Nanofibers of polyaniline (PAni) have been synthesized by a dilute polymerization method and functionalized by 1% glutaraldehyde solution in phosphate buffer solution (PBS) (pH ¼ 7.4) and in thin films to introduce a polar chemical group in order to develop a novel bioactive platform for tissue engineering applications. TEM estimates the nanofibers to have an average diameter of 35.66 nm. FESEM images confirm the presence of interconnected nanofibrous structures of PAni powder and the highly entangled morphology of the films. Thermogravimetric analysis indicates enhanced thermal stability of polyaniline nanofibers (PNFs) after functionalization. UV-visible absorption and photoluminescence studies demonstrate that PNFs are in emeraldine base (EB) form before and after functionalization. FTIR and NMR spectroscopic studies reveal successful incorporation of polar hydroxyl (-OH) and aldehyde (-CHO) groups into the PNFs. Contact angle measurements demonstrate an increase in wettability of PAni films after surface functionalization as the contact angle decreases from 76.2 to 52.1 . Surface energy calculations using OWRK (Owens, Wendt, Rabel and Kaelble) and AB (acid-base) methods show an increase in energy and polarity of the surface, endowing it with biocompatibility. Membrane stability tests reveal less haemolysis activity by surface-functionalized polyaniline nanofibers (SF-PNFs). MTT assay of human peripheral blood mononuclear cells (PBMC) shows a significant increase in cell viability after surface functionalization of PNFs. The non-cytotoxic effects of SF-PNFs make them a biocompatible scaffold for biomedical applications such as tissue engineering and drug delivery.

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Surface functionalization effects on structural, conformational, and optical properties of polyaniline nanofibers

Cited by 62 publications

References 36 publications

Polyaniline-modified nanocellulose prepared from Semantan bamboo by chemical polymerization: preparation and characterization

Polyaniline-modified nanocellulose prepared from Semantan bamboo by chemical polymerization: preparation and characterization

Progression in sensing cardiac troponin biomarker charge transductions on semiconducting nanomaterials

Surface functionalization-induced enhancement in surface properties and biocompatibility of polyaniline nanofibers

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