article · Journal of Materials Science Materials in Electronics
Gold nanoparticles were produced using both a plant extract method and a laser ablation technique, then combined with a triple polymer blend of polyvinylpyrrolidone, polyvinyl alcohol, and carboxymethyl cellulose via solution casting. Structural and spectroscopic analyses confirmed the semicrystalline nature of the resulting nanocomposite films. Gold nanoparticles prepared with plant extracts achieved a noticeably more uniform dispersion within the polymer matrix compared to those produced through laser ablation. This structural integration altered interatomic spacing, increasing the refractive index and improving optical characteristics. Electrical modulus analyses revealed non-Debye relaxation behaviour of charge carriers along with notable capacitive performance. Nanocomposites containing biosynthesised gold nanoparticles exhibited enhanced dielectric traits, reaching an alternating current electrical conductivity of 1.58 × 10⁻³ S/cm. These optical and electrical enhancements support the functional suitability of the material for optoelectronic purposes.
Developing advanced materials with combined optical and electrical qualities is essential for creating more responsive electronic components. By demonstrating that a plant-based synthesis route produces more evenly dispersed nanoparticles than laser ablation, this work highlights a practical method to improve the conductivity and capacitance of flexible polymer films for light-based and detection technologies.
The resulting polymer films show potential for optoelectronic applications, specifically sensor devices requiring enhanced conductivity and refractive performance. Relevant end users include developers of optical components and sensing equipment. The work currently represents early-stage materials synthesis and laboratory testing, meaning further development, device prototyping, and stability evaluations are necessary before reaching commercial adoption.
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Abstract In the present work, gold nanoparticles (Au-NPs) were synthesized in two ways: plant extract and laser ablation techniques. Then, Au-NPs were added to (PVP/PVA/CMC) blend (TB) to produce novel nanocomposites using the solution casting technique. X-ray diffraction analysis, Ultraviolet and visible spectroscopy, and transmission electron microscopy provided conclusive evidence for preparing Au-NPs through the above methods. The optical, structural, and dielectric properties of the prepared samples were prudently investigated and confirmed their semicrystalline nature. TEM study concluded that Au-NPs are more uniformly distributed in the TB/AuNPs-biosynthesized (TBAu-B) matrix than in the TB/Au-NPs prepared by laser ablation (TBAu-L) matrix. The decrease in interatomic distances increases the refractive index with an enhancement in optical properties. The change in loss tangent provided a deeper discernment into the relaxation dynamics that arose inside the current films. The electric modulus formalism verified the non-Debye behavior of charge carriers inside the TB-based nanocomposite samples. It also demonstrated a remarkable capacitive feature of the nanocomposite films. The dielectric characteristics of the TBAu-B nanocomposite sample have improved, where AC electrical conductivity reached 1.58 × 10 −3 S/cm. Because of this favorable enhancement, the TBAu-B nanocomposite has the potential to be utilized in optoelectronic applications such as sensors.
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DOI: 10.1007/s10854-022-09402-3
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