The futures of optical properties of nanocomposites on base of GO-PVA-Ag nanowires

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2025-06-18 DOI:10.1016/j.nanoso.2025.101507

Mahammad Baghir Baghirov, Mustafa Muradov, Goncha Eyvazova

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引用次数: 0

Abstract

In this study, graphene oxide (GO) and silver nanowires (AgNWs) were synthesized using modified Hummers and polyol methods, respectively, and incorporated into a polyvinyl alcohol (PVA) matrix to prepare GO/AgNWs/PVA nanocomposites with varying GO concentrations (1 %, 2 %, 3 %, and 5 %). Structural characterization using XRD revealed that increasing GO content reduced the crystallinity of the PVA matrix, while AgNWs retained their crystalline structure. TEM and SEM analyses showed that the distribution of fillers was homogeneous, although higher GO content led to increased porosity and microcracks on the surface. Optical studies demonstrated that the band gap of the composites decreased systematically with higher GO content from 1.83 eV at 1 % GO to 1.47 eV at 5 % GO in the GO/AgNWs/PVA samples indicating strong interaction between the free electrons of AgNWs and charge carriers in GO. The formation of an additional potential field at the metal–semiconductor interface significantly influenced the energy spectrum of the composites. These results suggest that careful control of the GO and AgNW content allows tailoring of the structural and optical properties of polymer-based nanocomposites for optoelectronic applications.

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基于GO-PVA-Ag纳米线的纳米复合材料光学性能的展望

在本研究中，分别使用改进的Hummers和多元醇方法合成氧化石墨烯（GO）和银纳米线（AgNWs），并将其掺入聚乙烯醇（PVA）基体中，制备出不同氧化石墨烯浓度（1 %,2 %，3 %和5 %）的氧化石墨烯/AgNWs/PVA纳米复合材料。XRD结构表征表明，氧化石墨烯含量的增加降低了PVA基体的结晶度，而AgNWs保持了原有的晶体结构。TEM和SEM分析表明，填充物的分布是均匀的，尽管高氧化石墨烯含量会导致表面孔隙率和微裂纹的增加。光学研究表明，在GO/AgNWs/PVA样品中，随着GO含量的增加，复合材料的带隙系统地减小，从1.83 eV（1 % GO）到1.47 eV(5 % GO)，表明AgNWs的自由电子与GO中的载流子之间存在强烈的相互作用。在金属-半导体界面处形成附加势场对复合材料的能谱有显著影响。这些结果表明，仔细控制氧化石墨烯和AgNW含量可以定制用于光电应用的聚合物基纳米复合材料的结构和光学性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .