Designing a novel PVA-embedded Ag@CdS core@shell nanocrystals for potential nanoelectronic devices

The approach emphasizes dispersing Ag@CdS (ACS) core@shell (CS) nanocrystals (NCs) in polyvinyl alcohol (PVA) and activating them at room temperature by way of a straightforward wet chemical co-precipitation process. The improved performance of ACS NCs is due to their CS shape, surface plasmon resonance, and quantum confinement phenomena. The ultraviolet–visible and photoluminescence spectroscopy revealed variations in optical properties, including a tunable band gap in CdS quantum dots, indicating their potential as nanoelectronic (NE) devices. X-ray diffraction, transmission electron microscopy, and scanning electron microscopy measurements validated the nanoscale development of ACS NCs on the PVA surface. Findings NCs have excellent dielectric characteristics in capacitors, which improves energy storage efficiency as capacitance falls with frequency due to increased polarization. The assemblies outperform those with simply core or shell NCs, with ACS CS NCs producing a peak dielectric constant of 10⁶, capacitance of 200 nF, conductivity of 0.1, and a voltage gain of 91% at specific frequencies. The incorporation of ACS NCs into PVA has major implications for future NE applications, including low-pass frequency filters, energy conversion, energy storage, memristive devices, and sensors. This study enhances energy-efficient technologies by embedding ACS in a stable PVA matrix, improving NCs’ functionality and stability for NE devices.