Nano-Horizons: Journal of Nanosciences and Nanotechnologies最新文献

Influence of Adansonia digitata Stem Extract Immersion Time on Properties of Biosynthesised Silver Nanoparticles 猴面包树茎提取物浸泡时间对生物合成银纳米粒子特性的影响

Nano-Horizons: Journal of Nanosciences and Nanotechnologies Pub Date : 2024-07-18 DOI: 10.25159/3005-2602/15935

S. Ezike, Mustafa S. Adamu, Emmanuel Ike, M. A. Salawu, Pascal Timtere, R. Obodo

{"title":"Influence of Adansonia digitata Stem Extract Immersion Time on Properties of Biosynthesised Silver Nanoparticles","authors":"S. Ezike, Mustafa S. Adamu, Emmanuel Ike, M. A. Salawu, Pascal Timtere, R. Obodo","doi":"10.25159/3005-2602/15935","DOIUrl":"https://doi.org/10.25159/3005-2602/15935","url":null,"abstract":"The emergence of the multidisciplinary field of nanoscience with potential applications in medicine, cosmetics, renewable energy, agriculture and environmental remediation has led scientists to search for safer methods of synthesising nanoparticles. We based this study on the synthesis of silver nanoparticles (AgNPs) for varying immersion times of 30, 60, 90, 120 and 150 min, while employing Adansonia digitata as a reducing and capping agent and labelled A, B, C, D and E, respectively. The X-ray diffraction (XRD) pattern of the synthesised AgNPs for all samples have three peaks positioned at 2θ = 37.94°, 44.07° and 64.37° corresponding to (111), (200) and (220) planes, respectively. The samples have a preferred orientation at 2θ = 37.94° corresponding to (111) plane irrespective of the duration of immersion of Adansonia digitata root extracts. The preferred intense peak shows a polycrystalline phase composition of the green synthesised AgNPs, demonstrating the creation of face-centred cubic crystalline of AgNPs. The intrinsic stress, σs, dislocation density, δ, specific surface area, S, crystallite size (D), surface area (S) to volume (V) ratio, lattice parameter, a and atomic packing factor were calculated from XRD data and presented. The particle sizes obtained from the SEM analysis are 69.88, 18.69, 15.45, 19.64 and 20.08 nm for samples A, B, C, D and E, respectively. The optical energy band gaps are 2.37 eV, 2.42 eV, 2.59 eV, 2.52 eV and 2.34 eV for samples A, B, C, D and E respectively. The synthesised AgNPs can be used in energy storage and conversions owing to their properties.","PeriodicalId":210951,"journal":{"name":"Nano-Horizons: Journal of Nanosciences and Nanotechnologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141824294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the Dielectric Photosensitivity of Zinc Oxide Nanostructures Under Ultraviolet Light 研究氧化锌纳米结构在紫外线下的介电光敏性

Nano-Horizons: Journal of Nanosciences and Nanotechnologies Pub Date : 2024-04-04 DOI: 10.25159/3005-2602/14260

Esmaeil Salahi, Hoda Enayati Taloobaghi, Mohammad Mahdi Shahidi, Fabien Ezema

引用次数: 0

Selective Gamma-Ray Ionisation of Vanadium Oxides: Towards the Formation of VO2 氧化钒的选择性伽马射线电离：生成二氧化钒

Nano-Horizons: Journal of Nanosciences and Nanotechnologies Pub Date : 2023-12-20 DOI: 10.25159/3005-2602/14875

M. Ndiaye, O. Sakh, A. Seck, B. Ngom, M. Maaza, M. Chaker

引用次数: 0

Physical Properties of ZnO-NPs Induced by the Thermal Annealing of Hydrozincite Derived from Adansonia Digitata Leaves Extract 从猴面包树叶提取物中提取的氢锌矿热退火诱导的 ZnO-NPs 物理性质

Nano-Horizons: Journal of Nanosciences and Nanotechnologies Pub Date : 2023-12-05 DOI: 10.25159/3005-2602/13789

I. Ngom, A. Fall, Samba Sarr, Baye Modou Ndiaye, Seynabou Mbodj, Remy Bucher, B. Ngom

{"title":"Physical Properties of ZnO-NPs Induced by the Thermal Annealing of Hydrozincite Derived from Adansonia Digitata Leaves Extract","authors":"I. Ngom, A. Fall, Samba Sarr, Baye Modou Ndiaye, Seynabou Mbodj, Remy Bucher, B. Ngom","doi":"10.25159/3005-2602/13789","DOIUrl":"https://doi.org/10.25159/3005-2602/13789","url":null,"abstract":"In this study, we investigated the effects of the annealing temperatures on the physical properties of zinc oxide nanoparticles produced by the decomposition of the hydrozincite obtained from Adansonia digitata leaves. The results of the X-ray diffraction revealed the formation of well-crystallised hexagonal zinc oxide with an average crystallite size of 11.80 nm, 11.90 nm, 11.97 nm and 15.28 nm for the samples annealed at 400 °C, 500 °C, 600 °C and 700 °C, respectively. The crystallite size of the hydrozincite constituting the unannealed sample was 22 nm. In the spectra of the Fourier transform infrared spectroscopy, the appearance of the peaks at 520 cm-1 for all synthesised materials confirms the formation of pure wurtzite zinc oxide. The band gap determined from diffuse reflectance ultraviolet-visible spectroscopy was found to be 3.19 eV, 3.21 eV, 3.23 eV and 3.24 eV for the samples annealed at 400 °C, 500 °C, 600 °C and 700 °C, respectively. These values increase with the annealing temperature and are still lower than the band gap of pure bulk zinc oxide (3.3 eV) owing to the structural defects as confirmed by the broad emission bands in the visible depicted from the photoluminescence analysis.","PeriodicalId":210951,"journal":{"name":"Nano-Horizons: Journal of Nanosciences and Nanotechnologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138598809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hemp Fibres: Essentials, Composites or Nanocomposites and Technical Applications 大麻纤维：基本原理、复合材料或纳米复合材料及技术应用

Nano-Horizons: Journal of Nanosciences and Nanotechnologies Pub Date : 2023-11-17 DOI: 10.25159/3005-2602/13835

Ayesha Kausar, Ishaq Ahmad

{"title":"Hemp Fibres: Essentials, Composites or Nanocomposites and Technical Applications","authors":"Ayesha Kausar, Ishaq Ahmad","doi":"10.25159/3005-2602/13835","DOIUrl":"https://doi.org/10.25159/3005-2602/13835","url":null,"abstract":"In this article, we overview a very important type of natural fibre, namely, hemp fibre. We consider the exclusive structure, properties, modification, the composite or nanocomposite formation and exceptional application zones. Industrial hemp fibres have been commonly developed and possess high cellulose amounts. The long hemp fibres can be termed bast or flax fibres. Hemp fibres are eco-friendly, and have light weightiness and stiffness properties. Consequently, to enhance the use of hemp fibres at engineering level, research has focused on improving the mechanical or thermal and high-tech features of these fibres. In doing this, the surface modification or treatment of hemp fibres has been notably considered. The modified fibres have been found valuable for developing certain derived materials such as polymeric composites and nanocomposites in particular. Consequently, including hemp fibres as additives in composite or nanocomposite matrices has been explored for manufacturing high performance ecological, recyclable, biodegradable and sustainable materials. Application areas identified for the hemp and related composites or nanocomposites include the synchrotron and neutron scattering, water treatment aiming dye removal, automobiles, textiles and construction. However, there is insufficient literature on these technologically important fibres and ensuing materials. Comprehensive future efforts may better resolve the challenges regarding reproducibility and long life-cycle high-tech applications of hemp fibres.","PeriodicalId":210951,"journal":{"name":"Nano-Horizons: Journal of Nanosciences and Nanotechnologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139265072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study on the Properties of Sodium Dodecyl Sulfate Surfactant-Assisted Zinc Oxide Thin Films Doped with Molybdenum 十二烷基硫酸钠表面活性剂辅助掺钼氧化锌薄膜的性能研究

Nano-Horizons: Journal of Nanosciences and Nanotechnologies Pub Date : 2023-09-04 DOI: 10.25159/3005-2602/13831

A. Nkele, David C. Okeudo, B. Obitte, F. Ezema

引用次数: 0