{"title":"Boosting the structural, electrical properties, and optical features of porous starch/poly(ethylene oxide) reinforced with NiMoO4 nanocrystals","authors":"Tarek I. Alanazi","doi":"10.1007/s10854-024-14077-z","DOIUrl":null,"url":null,"abstract":"<div><p>Synthesizing and characterizing novel flexible polymeric bio-nanocomposites for advanced applications in the medical, optoelectronic, and energy sectors has become an interesting topic of research worldwide. This work reports the influence of nickel molybdenum oxide nanocrystals (NiMoO<sub>4</sub> NC) on the structure, electrical features, and optical factors of a starch/polyethylene oxide (St/PEO) blend. The analyses carried out by the transmission electron microscope X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), and FTIR techniques displayed that the sol–gel prepared NiMoO<sub>4</sub> composed of nanoparticles/nanorods, crystallized in a monoclinic structure with high purity. XRD, FTIR, and scanning electron microscopy, field-emission mode, (FE-SEM) showed that the semi-crystalline and porous structure of the nanocomposites was influenced by the uniform filler distribution. The effect of NiMoO<sub>4</sub> NC level on the dielectric permittivity, loss factor, and ac conductivity of St/PEO was studied under heating, and at frequencies up to 7 MHz. Moreover, various optical factors (transmittance in the UV–vis-NIR wavelengths, extinction coefficient, band gap, optical-dielectric loss, and index of refraction (<i>n</i>)) were also evaluated and discussed. The films displayed dual direct/indirect <span>\\({\\text{band gaps }E}_{g}^{op}\\)</span>. The direct (indirect) <span>\\({E}_{g}^{op}\\)</span> narrowed from 4.8 to 4.3 eV (3.9 to 3.0 eV) for the high-energy region. NiMoO<sub>4</sub> NC changed the <i>n</i> behavior to a wave-like pattern with a significant increase to 3.5˗5.0. The structural changes, as well as the related dielectric and optical enhancements, make NiMoO<sub>4</sub>/St/PEO materials ideal candidate semiconductors for high refractive index and energy-storing applications.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 1","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science: Materials in Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10854-024-14077-z","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Synthesizing and characterizing novel flexible polymeric bio-nanocomposites for advanced applications in the medical, optoelectronic, and energy sectors has become an interesting topic of research worldwide. This work reports the influence of nickel molybdenum oxide nanocrystals (NiMoO4 NC) on the structure, electrical features, and optical factors of a starch/polyethylene oxide (St/PEO) blend. The analyses carried out by the transmission electron microscope X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), and FTIR techniques displayed that the sol–gel prepared NiMoO4 composed of nanoparticles/nanorods, crystallized in a monoclinic structure with high purity. XRD, FTIR, and scanning electron microscopy, field-emission mode, (FE-SEM) showed that the semi-crystalline and porous structure of the nanocomposites was influenced by the uniform filler distribution. The effect of NiMoO4 NC level on the dielectric permittivity, loss factor, and ac conductivity of St/PEO was studied under heating, and at frequencies up to 7 MHz. Moreover, various optical factors (transmittance in the UV–vis-NIR wavelengths, extinction coefficient, band gap, optical-dielectric loss, and index of refraction (n)) were also evaluated and discussed. The films displayed dual direct/indirect \({\text{band gaps }E}_{g}^{op}\). The direct (indirect) \({E}_{g}^{op}\) narrowed from 4.8 to 4.3 eV (3.9 to 3.0 eV) for the high-energy region. NiMoO4 NC changed the n behavior to a wave-like pattern with a significant increase to 3.5˗5.0. The structural changes, as well as the related dielectric and optical enhancements, make NiMoO4/St/PEO materials ideal candidate semiconductors for high refractive index and energy-storing applications.
期刊介绍：
The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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