Digest Journal of Nanomaterials and Biostructures最新文献_第10页

Structural, AC conductivity, dielectric and impedance studies of polypyrrole/praseodymium calcium manganite nanocomposites 聚吡咯/镨钕钙锰酸盐纳米复合材料的结构、交流电导率、介电和阻抗研究

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.343

M. Bharathi, K. Anuradha, M. Murugendrappa

{"title":"Structural, AC conductivity, dielectric and impedance studies of polypyrrole/praseodymium calcium manganite nanocomposites","authors":"M. Bharathi, K. Anuradha, M. Murugendrappa","doi":"10.15251/djnb.2023.181.343","DOIUrl":"https://doi.org/10.15251/djnb.2023.181.343","url":null,"abstract":"In-situ polymerization of a series of nanocomposites viz. 10, 20, 30, 40 and 50 wt % of Praseodymium Calcium Manganite Oxide (Pr0.75Ca0.25MnO3) (PCM) nano manganites in polypyrrole (PPy) were prepared by chemical polymerization technique. The crystalline nature of all the nanocomposites was confirmed by powder X-ray diffraction (XRD). The orthorhombic structure with space group Pnma was confirmed by the well-fitted Rietveld refined XRD data. The average particle size was observed to be in the range of 42 to 60 nm. Scanning Electron Microscope (SEM) confirmed the spherical nature of the particles. The TEM confirmed the crystallinity and Fourier Transform Infra-Red Spectroscopy (FTIR) showed that the stretching frequencies shifted towards higher frequencies for the nanocomposites suggesting better conjugation due to chemical interaction between the PPy and PCM particles. AC conductivity versus frequency showed that at higher frequencies the AC increases obeying Jonscher’s power law. The correlated barrier hopping (CBH) model is therefore used to describe the conduction mechanism. For all composites, the dielectric constant and tangent loss revealed a frequency- and temperaturedependent character. The real and imaginary impedance were both frequency and temperature dependent. The impedance data were analyzed by fitting Nyquist plots using ZsimpWin software which confirmed non Debye type of behavior. This study highlights on the interactions between conduction processes, grain boundaries, and grains.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43563804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploration of third order nonlinear optical features of CuO/PVA-PEG polymer nanocomposites CuO/PVA-PEG聚合物纳米复合材料三阶非线性光学特性的探索

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.367

K. Kannan, S. Agilan, P. Peulakumari, G. Saveetha

引用次数: 0

Elastic properties of SiO2 nanostructure in high-pressure conditions 高压条件下SiO2纳米结构的弹性性能

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.263

Z. Radi, S. Tlili, K. Layadi, L. Louail, A. Yells-Chaouche, Y. Madhekour, S. Guettouche

引用次数: 1

Electrochemical, structural, optical, and morphological characteristics of Cu-loaded ZnO nanostructures synthesized from bio-waste (maize) using a green synthesis technique 利用绿色合成技术从生物废料（玉米）中合成Cu负载ZnO纳米结构的电化学、结构、光学和形态特征

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.291

R. Jagadeeswari, G. Rathika, K. Satheesh kumar, P. Selvakumar

{"title":"Electrochemical, structural, optical, and morphological characteristics of Cu-loaded ZnO nanostructures synthesized from bio-waste (maize) using a green synthesis technique","authors":"R. Jagadeeswari, G. Rathika, K. Satheesh kumar, P. Selvakumar","doi":"10.15251/djnb.2023.181.291","DOIUrl":"https://doi.org/10.15251/djnb.2023.181.291","url":null,"abstract":"The study reports feasibility to synthesis copper loaded ZnO nanoparticles using a green synthesis approach influenced by natural extracts from waste maize materials is explored. Different methods were used to investigate the physicochemical characteristics of Cu-ZnO nanoparticles. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) studies were used to investigate the structural behavior of Cu-ZnO nanoparticles. XRD analysis shows that Cu-ZnO has a typical crystallite size of 23.5nm and a confirmed hexagonal structure. In the wavenumber range 400–600 cm-1 , FT-IR confirmed the presence of metallic elements in Cu-ZnO samples. Through the use of UV–vis spectroscopy, we were able to investigate the optical characteristics of Cu-ZnO. The samples' surface morphology was recorded by FESEM, and their elemental content was evaluated by EDX. This verifies the spherical shape of prepared samples with homogeneous size distributions across their structures. The nanostructured redox behaviour of electroactive Cu-ZnO has been investigated by cyclic voltammetry","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42741322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation the effect of Co3O4 doping on structural and mechanical properties of ZnO pallets synthesized by powder metallurgy method and their biological evaluation Co3O4掺杂对粉末冶金法合成ZnO托盘结构和力学性能的影响及其生物学评价

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.307

A. Shuaib, F. Mannan, Z. Ali, H. Rehman, M. H. Farooq, T. G. Shahzady

引用次数: 0

Preparation and anti-biological adhesion performance evaluation of ZNO@PSBMA super hydrophilic coating ZNO@PSBMA超亲水性涂料的制备及抗生物粘附性能评价

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.315

G. Xu, C. Q. Li, C. Wang, Z. Xue, F. Liang, X. Shen, J. J. Wang, A. Amirfazli

{"title":"Preparation and anti-biological adhesion performance evaluation of ZNO@PSBMA super hydrophilic coating","authors":"G. Xu, C. Q. Li, C. Wang, Z. Xue, F. Liang, X. Shen, J. J. Wang, A. Amirfazli","doi":"10.15251/djnb.2023.181.315","DOIUrl":"https://doi.org/10.15251/djnb.2023.181.315","url":null,"abstract":"In this study, zinc oxide (ZnO) nanoparticles were modified by means of dispersion using a γ-aminopropyl triethoxysilane coupling agent (KH550), obtaining KH550-ZnO. Then a certain amount of SBMA powder was put into the KH550-ZnO solution, and the ensuing polymerization reaction produced super hydrophilic PSBMA-KH550-ZnO powder. Finally, several polished aluminum sheets were immersed in the PSBMA-KH550-ZnO aqueous solution to start deposition. Upon completion of the deposition, the aluminum sheets were taken out and dried to obtain samples of the ZnO@PSBMA super hydrophilic coating. The structure, morphology and chemical composition of the powders and coatings were investigated by SEM, IR and EDS. The dispersion of KH550-ZnO in aqueous solution was analyzed. The results show that the particle size of KH550-ZnO decreases greatly in aqueous solution. The substrate can be superhydrophilic when deposited in PSBMA-KH550-ZnO aqueous solution for 130 minutes，After 48 hours of coating deposition, the compactness, roughness and friction resistance of the coating are greatly improved. ZnO@PSBMA superhydrophilic coating has good anti-protein, anti-bacterial and anti-algal adhesion properties.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43484763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of CNT fillers on the thermal, mechanical and shape memory properties of TPI shape memory polymer composites CNT填料对TPI形状记忆聚合物复合材料热性能、力学性能和形状记忆性能的影响

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.299

L. Prabhu, V. Selvakumar, A. Anderson, C. Dhavamani

引用次数: 0

SiGe quantum wells implementation in Si based nanowires for solar cells applications 太阳能电池用硅基纳米线中SiGe量子阱的实现

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.327

M. Safi, A. Aissat, H. Guesmi, J. Vilcot

引用次数: 0

Capacitive response of nanoporous HMDSO film coated interdigited electrodes towards VOCs molecules 纳米多孔HMDSO膜涂覆的交叉电极对VOCs分子的电容性响应

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.279

K. Dallah, A. Bellel, O. C. Lezzar, S. Sahli

{"title":"Capacitive response of nanoporous HMDSO film coated interdigited electrodes towards VOCs molecules","authors":"K. Dallah, A. Bellel, O. C. Lezzar, S. Sahli","doi":"10.15251/djnb.2023.181.279","DOIUrl":"https://doi.org/10.15251/djnb.2023.181.279","url":null,"abstract":"In this paper, nano-porous thin films capacitive-type sensors have been fabricated for the detection of volatile organic compounds (VOCs) using the micro sized interdigitated electrodes (IDEs). The sensitive layers were elaborated from hexamethyldisiloxane (HMDSO) using plasma enhanced chemical vapor deposition (PECVD) technique. The choice of HMDSO polymer as sensitive layer is based on its low dielectric constant compared to analytes ones. The sensing performances of plasma polymers were strongly correlated to their chemical and physical properties, which depend directly on the plasma polymerization conditions including monomer pressure. The sensor sensitivity was at its highest value of 0.32, 0.24 and 0.20 pF/ppm towards methanol, ethanol and acetone, respectively, for the device fabricated with the smallest gap (36 µm) and higher monomer pressure (50 Pa). Chemical and morphological structures of the elaborated thin sensitive layers have been investigated by Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) and scanning electron microscope (SEM), respectively.","PeriodicalId":11233,"journal":{"name":"Digest Journal of Nanomaterials and Biostructures","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45694078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel statistically optimized one pot synthesis of inherently photoluminescent and electroactive graphene oxide nanosheets as 1, 4 dioxane sensor 新型统计优化一锅法合成固有光致发光和电活性氧化石墨烯纳米片作为1,4-二恶烷传感器

IF 0.9 4区材料科学

Digest Journal of Nanomaterials and Biostructures Pub Date : 2023-03-01 DOI: 10.15251/djnb.2023.181.377

R. Renjithkumar, B. Iffath, T. Devasena

引用次数: 0