Effect of silane/amine-based dopants on polymer-metal interaction of sub-surface silver nanoparticulate films

Abstract

The optical and morphological properties of the vacuum-evaporated silver (Ag) nanoparticulate films on softened polyvinyl alcohol (PVA) modified with the 3-mercaptopropyl trimethoxysilane (MPTMS) and 3-aminopropyl trimethoxysilane (APTMS) dopants are reported. The topography of the particulate films is characterized by the field-emission scanning electron microscopy. The optical spectra broadening, red-shift, and the increase in the intensity values of the plasmonic resonance peak with the nature of dopant have a strong dependence on the particle size, shape, and inter-particle separation. The conducted experimental optical studies are supported by Finite Difference Time-Domain (FDTD) simulation results. Quantitative analysis of the Fourier-Transform Infrared Spectroscopy (FTIR) and Raman Spectroscopy studies confirm the surface modification of Ag nanoparticulate films on doped PVA substrates. The amount of polymer-metal interaction caused by the strongly interacting silane groups of the dopants and their influence on the morphology and optical properties are discussed.

CuAg and AuAg bimetallic nanoparticles for catalytic and heat transfer applications

“…1a. CuAg BNPs showed absorbance peak at 389 nm, while Cu and Ag NPs are exhibiting at 574 and 410 nm, respectively (Pellarin et al 2015;Cao et al 2019;Jolly et al 2021). The influence of pH on the optical properties of CuAg BNPs is depicted in Fig.…”

How APTMS Acts as a Bridge to Enhance the Compatibility of the Interface between the Hydrophilic Poly(vinyl alcohol) Film and the Hydrophobic Stearic Acid Coating

“…Moreover, APTMS introduces amino groups (−NH 2 ), which possess reactive properties and can undergo further reactions with the carboxyl groups (−COOH) present in SA molecules. As a result, amide bonds (−CONH−) are formed between APTMS and SA, facilitating the attachment of the hydrophobic SA coating onto the surface of the PVA film. − Overall, through hydrogen bonding between PVA and APTMS, together with chemical bonding between APTMS and SA, a dense network structure is formed, enhancing the hydrophobicity and water resistance of the PVA-based films. − More importantly, the hydrophobicity and water vapor permeability of the PVA film are of paramount importance in fruit packaging. Therefore, there is an urgent need to conduct research and develop a novel PVA film that possesses robust water resistance and exceptional barrier properties to expand the extensive utilization of PVA-based films in the field of food preservation.…”