A new class of PANI–Ag core–shell nanorods with sensing dimensions

Abstract

A single-step, cost-effective and eco-safe synthesis of a new class of homogeneous silver-polyaniline (PANI-Ag) core-shell nanorods is carried out via mild photolysis by ultraviolet radiation from sunlight (SUN UV-radiation). X-ray diffraction (XRD) of these core-shell nanorods gives two additional peaks from PANI centered at 2θ = 20.5° and 24. 9°. A validation of the core-shell structural information is given by transmission electron spectroscopy (TEM) whereas the tubular shape morphology is determined by scanning electron microscopy (SEM). UV-Vis. absorption shows a strong blue-shift along with photoluminescence emission. Fourier transform-infrared spectroscopy (FT-IR) and energy dispersive X-ray spectroscopy (EDX) also support the core-shell formation. Thermogravimetric analysis (TGA) shows good thermal stability and allows excellent detection of hydrogen peroxide and hydrazine. The cyclic voltammetry (CV) results show excellent electro-activation, indicating its promising potential in sensing of clinical and environmental analytes.

Fabrication and Characterization of Conductive Conjugated Polymer‐Coated Antheraea mylitta Silk Fibroin Fibers for Biomedical Applications

“…The presence of a PPY coating was confirmed by the occurrence of these elements in the PPY/SF samples (Figure c). Similarly, carbon, nitrogen, oxygen, sulfur, and chlorides were found to be the major component of PANI powder (Figure d), in agreement with the structure and polymerization process used for this polymer. These elements were also present in the coated PANI/SF (Figure e) samples alongside sodium and calcium from the fibroin network.…”

Highly sensitive H2O2 sensor based on Co3O4 hollow sphere prepared via a template-free method

“…Thus, the current research on H 2 O 2 detection is mainly focused on electrode modifications in order to decrease the overpotential and increase the electron transfer kinetics. Noble metal and their composites [18][19][20][21] are proved to be effective electrocatalysts for sensing H 2 O 2 due to their excellent conductivities and homogeneous mixed-valence redox pairs on surface. However, the scarcity and high cost of noble metals hinder their widespread application.…”

Investigations on the performance of poly(o-anisidine)/graphene nanocomposites for the electrochemical detection of NADH

“…Conducting polymers have been used as potential systems for the immobilisation of enzymes due to their numerous compelling features such as (i) the ability to transfer the electrons directly to and from the enzymes and simultaneously act as suitable matrices for entrapment of the enzymes; (ii) the conducting polymers exhibit flexible chemical structure; (iii) these materials are compatible with neutral solutions which is essential for enzyme activity and (iv) good stability in aqueous solutions and air [15,16]. Polyaniline (PANI), as one of the most important conducting polymers had been extensively investigated because of its good electronic and optical properties, ease of synthesis, and good environmental stability [17][18][19]. In the case of sensor applications, nanostructured PANI has great sensitivity and fast response time due to its highly effective surface area and short penetration depth for target molecules [20].…”