Synthesis and characterization of Ag@polycarbazole nanoparticles using different oxidants and their dispersion behavior

Abstract

Ag nanoparticles (NPs) encapsulated by polycarbazole (PCz) have been synthesized using ion adsorption method. The PCz synthesis around Ag NPs has been performed by adsorbing Ag +1 and Fe +3 oxidants onto Ag NPs, which initiated surface polymerization and thus, Ag NPs@PCz nanocomposite has been synthesized. The morphology of pure NPs and composite NPs was characterized by TEM which also elucidated the effect of oxidant on the core NPs, beside their morphologies and phase contrasts of metal NPs and polymer. The polymer around the surface of core NPs was characterized by FT-IR which proved that PCz was the organic phase of the composite NPs. UV-Vis spectroscopy has been employed to study surface plasmon resonance (SPR) of pure NPs and composite of NP which demonstrated that SPR of core NPs remained preserved after coating with the polymer. Furthermore, Zeta Sizer Nano series has been applied to analyze the dispersion behavior of pure NPs and composite NPs which displayed the greatly improved dispersion behavior of the composite NPs as compared to pure Ag NPs. Therefore, our study proved helpful to analyze the suitability of metal oxidants for PCz based nanocomposite synthesis and determination of their optical and dispersion behavior.

Study of the Nonlinear Optical Properties of Ag/CdTe Composites

“…The nonlinear absorption coefficient can be calculated using the following equation [ 36 ] …”

“…The nonlinear absorption coefficient can be calculated using the following equation [36] β ¼ ffiffiffiffiffi 8a p…”

Ag Nanostructure Morphologies and Physicochemical Properties Dictated by the Polyols Used in the Synthesis

“…The morphological evolution of Ag NWs displayed in Figure 3 (a-e) shows the surface Plasmon resonance and the morphological evolution of Ag NWs. The shapes and sizes of the metal nanostructures produced varying degrees of SPR at different wavelengths [27][28]. According to the literature, the absorption peak of silver nanowires occurs between 350 nm and 380 nm [29].…”

Study on the evolutionary game theory of the psychological choice for online purchase of fresh produce under replicator dynamics formula

“…Through the improved small data method, when a = −0.5, take the delay time τ = 1 and the embedding dimension m = 1, the average period P = 3 and the data point N = 1629 to get the Lyapunov index λ = 0.8474 so as to judge. At this time, the game will appear chaotic with the evolution of time [11]. 3.…”