Nano-Structures & Nano-Objects最新文献_第2页

Morphological change of ZnO using hydrothermal technique and organic modifiers

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2025.101436

Md. Kawcher Alam , Md. Sahadat Hossain , Mofassel Hossen Akash , Abdullah Al Miad , Muhammad Shahriar Bashar , Newaz Mohammed Bahadur , Samina Ahmed

{"title":"Morphological change of ZnO using hydrothermal technique and organic modifiers","authors":"Md. Kawcher Alam , Md. Sahadat Hossain , Mofassel Hossen Akash , Abdullah Al Miad , Muhammad Shahriar Bashar , Newaz Mohammed Bahadur , Samina Ahmed","doi":"10.1016/j.nanoso.2025.101436","DOIUrl":"10.1016/j.nanoso.2025.101436","url":null,"abstract":"<div><div>This study provides the findings of a novel synthesis of zinc oxide (ZnO) nanoparticles by hydrothermal method. ZnO nanoparticles were synthesized using different organic solvents such as ethylene glycol (EG) and citric acid (CA) as a reaction medium. Utilizing X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and Fourier transform infrared (FT-IR) spectroscopy, the formed nanoflower and nanosphere zinc oxide were characterized. The studies' findings showed that the solvents controlled the dimension and morphology of the formed nanoparticles. X-ray diffraction (XRD) confirmed the formation of the ZnO, and the crystallite size (Scherrer method) of the produced nanoflowers and nanospheres was found to be 46.18 nm and 31.72 nm, respectively. It was evident from the peak of the FT-IR spectrum between 432 and 551 cm<sup>-1</sup> that the ZnO phase is contained in the produced nanoparticles. Using Rietveld refinement analysis, it has been found that the ZnO phase is almost 100 % pure.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101436"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100759","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

TiO2 nanotubes as an efficient green catalyst for the multi-component synthesis of blue light emissive pyrazolyl-thaizole based fluorophores

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2025.101439

Sultana Shaik , Sai Teja Talari , Rama Mohana Reddy Sirigireddy , Pushpavathi Itte , Kakarla Raghava Reddy , Chinna Gangi Reddy Nallagondu , Tejraj M. Aminabhavi

{"title":"TiO2 nanotubes as an efficient green catalyst for the multi-component synthesis of blue light emissive pyrazolyl-thaizole based fluorophores","authors":"Sultana Shaik , Sai Teja Talari , Rama Mohana Reddy Sirigireddy , Pushpavathi Itte , Kakarla Raghava Reddy , Chinna Gangi Reddy Nallagondu , Tejraj M. Aminabhavi","doi":"10.1016/j.nanoso.2025.101439","DOIUrl":"10.1016/j.nanoso.2025.101439","url":null,"abstract":"<div><div>TiO<sub>2</sub> nanotubes (TNTs) are employed as a green heterogeneous catalyst for the synthesis of solid-state blue light emissive pyrazolyl-thiazoles (PZTZs) (<strong>4</strong>) <em>via</em> the three-component reaction of β-enaminones (<strong>1</strong>), thiosemicarbazide (<strong>2</strong>) and α-bromoketones <strong>(3)</strong> in ethanol and water (2:1). TNTs were prepared by hydrothermal method and characterized by XRD, UV-Vis DRS, photoluminescence (PL), HRTEM and EDAX techniques. Construction of three C–N and one C-S bonds in a single-step, nature-friendly reaction profile, large substrate scope, use of non-hazardous solvents, excellent yields (91–98 %) in short reaction times, gram scale feasibility and formation of pure products without the help of column purification are the attractive features of the present multi-component reaction (MCR) strategy. In addition, the catalytic medium displayed excellent efficiency towards diversified β-enaminones (<strong>1</strong>) and α-bromoketones <strong>(3);</strong> the recovered TNTs catalyst is used 7 times. Photophysical and electrochemical properties of PZTZs (<strong>4</strong>) have been investigated. The synthesized PZTZs (<strong>4</strong>) showed tunable photophysical and electrochemical properties by varying the substituents on both thiazole and pyrazole rings. Hence, the PZTZs (<strong>4</strong>) are promising materials for fabricating efficient and economically viable blue organic light-emitting diodes (BOLEDs).</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101439"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100766","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

Biomineralization of calcium phosphates in nature

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2024.101425

Oxana V. Kharissova , Yolanda Peña Méndez , Boris I. Kharisov , Alexander L. Nikolaev , Sergei V. Dorozhkin , Deyani Nocedo Mena , Beatriz Ortega García

{"title":"Biomineralization of calcium phosphates in nature","authors":"Oxana V. Kharissova , Yolanda Peña Méndez , Boris I. Kharisov , Alexander L. Nikolaev , Sergei V. Dorozhkin , Deyani Nocedo Mena , Beatriz Ortega García","doi":"10.1016/j.nanoso.2024.101425","DOIUrl":"10.1016/j.nanoso.2024.101425","url":null,"abstract":"<div><div>The biomineralization processes of calcium phosphates (CaPs) in nature (animals, vegetation in the land and sea, fossilization during geological periods) are reviewed. As a result of the biomineralization processes in nature, several biominerals (about 60; inorganic solids generated by a huge variety of organisms resulting stiffen and harden mineralized tissues) are formed, including CaPs. CaP biomineralization is driven with aid of several biomolecules, present in microbes, mammals, and vegetation. Proteins, such as soluble noncollagenous proteins and insoluble collagen, possess enhanced biomineralization activity within the organic matrix, being involved in teeth and bone formation. The biomineralization is frequently the first stage of fossilization (preservation of life traces in the geological record). A description of apatites and CaPs formed as a result of biomineralization, its types, steps, models, mechanisms, and controlling factors are described. Proteins and phosphates involved in biomineralization, role of species of distinct nature and pH, biomineralized composites, influence of presenting carbonates, organic and biological molecules and species are discussed. Several applications of biomineralized CaPs are presented.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101425"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100761","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

Metamaterials for electromagnetic wave manipulation: Advancements and future prospects

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2024.101424

Md. Aminul Islam , Md. Jahid Hasan , Md. Shakil Chowdhury , Jubaraz Ghosh , Md Hosne Mobarak

{"title":"Metamaterials for electromagnetic wave manipulation: Advancements and future prospects","authors":"Md. Aminul Islam , Md. Jahid Hasan , Md. Shakil Chowdhury , Jubaraz Ghosh , Md Hosne Mobarak","doi":"10.1016/j.nanoso.2024.101424","DOIUrl":"10.1016/j.nanoso.2024.101424","url":null,"abstract":"<div><div>Metamaterials, with their unique ability to alter electromagnetic waves, have ushered in a new era of scientific and technological advancements. By exerting precise control over the behaviour of waves, these materials provide revolutionary applications, such as improved imaging, sensing, and communication systems. By utilizing sophisticated production processes such as nanofabrication methods and additive manufacturing, scientists can create metamaterials with exceptional accuracy at the nanoscale. This enables the practical application of these materials in various industries. Nevertheless, despite their excellent capacity, metamaterials encounter substantial obstacles, such as scalability concerns, intricate fabrication processes, and material degradation. However, current research endeavors, especially in interdisciplinary domains, present hopeful resolutions to surmount these obstacles, facilitating groundbreaking progress in domains like 5G technology, telecommunications, and medical imaging. This review study provides a complete analysis of recent accomplishments, problems, and probable future directions in metamaterial research. It offers insights into how nanotechnology addresses challenges and influences the field of electromagnetic manipulation.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101424"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100762","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

Synergistic effect of AgNPs and gentamicin: Inhibition of multi-drug resistance bacterial biofilm formation and down-regulated fim H gene

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2025.101437

Tabarak M. Mahmood , Kareem H. Jawad , Majid S. Jabir

{"title":"Synergistic effect of AgNPs and gentamicin: Inhibition of multi-drug resistance bacterial biofilm formation and down-regulated fim H gene","authors":"Tabarak M. Mahmood , Kareem H. Jawad , Majid S. Jabir","doi":"10.1016/j.nanoso.2025.101437","DOIUrl":"10.1016/j.nanoso.2025.101437","url":null,"abstract":"<div><div>Antibiotic resistance poses a significant public health concern, particularly in treating urinary tract infections (UTIs) caused by multi-drug resistant (MDR) Gram-negative bacteria. This study presents a novel approach to enhance the antibacterial activity of Gentamicin (Gent) against <em>Proteus mirabilis</em> and <em>Klebsiella pneumoniae</em> through the innovative creation of a silver nanoparticles (AgNPs) nanocomposite, termed Gent@AgNPs, using an environmentally friendly pulsed laser ablation technique. The morphology, size, and elemental composition of the silver nanoparticles (AgNPs) were examined using several analytical techniques, including (ZP.DLS, SEM, UV–vis spectroscopy, FT-IR, XRD, and TEM). The results confirmed that the hetero nanocomposite, consisting of silver nanoparticles and gentamicin, exhibited greater antimicrobial activity compared to gentamicin alone against two types of bacteria <em>P</em>. <em>mirabilis</em> and <em>K. pneumonia</em>. The mixture of silver nanoparticles with gentamicin was produced to enhance the drug delivery method to inhibit the growth of <em>K. pneumonia</em> and <em>P. mirabilis</em>, and also prevent the formation of bacterial biofilms on foley catheters. The smartly hybrid nanocomposite displayed an improvement, suggesting that in the future its potential as a viable therapeutic strategy against <em>P. mirabilis</em> and <em>K. pneumonia</em>. Additionally, it could be a promising approach to avoid the growth of bacterial biofilm formation during urinary tract infections (UTIs).</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101437"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156422","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

Combined viscous dissipation and joule heating effects on chemically radiative MHD micropolar flow with heat source and convective boundary conditions

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2025.101434

Jayaramireddy Konda , M.Narendranadh Reddy , Charankumar Ganteda , Rajyalakshmi Kottapalli , Y. Adinarayana , Vediyappan Govindan , Haewon Byeon , Busayamas Pimpunchat

{"title":"Combined viscous dissipation and joule heating effects on chemically radiative MHD micropolar flow with heat source and convective boundary conditions","authors":"Jayaramireddy Konda , M.Narendranadh Reddy , Charankumar Ganteda , Rajyalakshmi Kottapalli , Y. Adinarayana , Vediyappan Govindan , Haewon Byeon , Busayamas Pimpunchat","doi":"10.1016/j.nanoso.2025.101434","DOIUrl":"10.1016/j.nanoso.2025.101434","url":null,"abstract":"<div><div>The proposed study presents a comprehensive investigation of the combined effects of viscous dissipation and Joule heating on chemically reactive magnetohydrodynamic (MHD) micropolar fluid flow over a nonlinear stretching sheet, incorporating the influences of radiative heat transfer, heat source, and convective boundary conditions. The current study investigates the flow of a type of fluid called micropolar fluid in a stretched 2D space. This fluid is viscous, and the flow is influenced by convective boundary conditions. Mathematical equations are derived considering factors such as heat, friction, electrical effects, chemical reactions, and radiation heat transfer. The fluid can conduct electricity when exposed to an external magnetic field. The complex partial differential equations governing the boundary layer flow are simplified into ordinary differential equations using a technique known as similarity transformation. The problem is solved using the Runge-Kutta-Fehlberg method with a shooting technique. Graphs are generated to analyze how physical factors influence temperature and concentration profiles. The skin friction coefficient, local Nusselt number, and local Sherwood number are calculated and studied. In this study, we compare our results with those of other research and find good agreement.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101434"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156677","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

Synthesis of copper nanowires and facile fabrication of nanostructured conductors with high transparency in 400–2500 nm spectral range

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2024.101429

Pavel V. Arsenov , Konstantin S. Pilyushenko , Polina S. Mikhailova , Mikhail A. Atlanov , Maksim A. Popov , Nikolay P. Simonenko , Tatiana L. Simonenko , Ivan S. Vlasov , Ivan A. Volkov

{"title":"Synthesis of copper nanowires and facile fabrication of nanostructured conductors with high transparency in 400–2500 nm spectral range","authors":"Pavel V. Arsenov , Konstantin S. Pilyushenko , Polina S. Mikhailova , Mikhail A. Atlanov , Maksim A. Popov , Nikolay P. Simonenko , Tatiana L. Simonenko , Ivan S. Vlasov , Ivan A. Volkov","doi":"10.1016/j.nanoso.2024.101429","DOIUrl":"10.1016/j.nanoso.2024.101429","url":null,"abstract":"<div><div>We studied the effect of parameters of a hydrothermal synthesis of copper nanowires on their dimensional characteristics. A robust protocol for the synthesis and isolation of copper nanowires with an average diameter of about 60 nm and a length of about 90 μm was developed. The final dispersion enriched with target nanowires purified from low-volatile oleylamine involved in the synthesis was used to fabricate transparent conductive films by spin coating. To increase the conductivity of the films, the rapid and efficient technique of removing the native oxide shell of nanowires utilizing the solution of formic acid in isopropyl alcohol was proposed. The fabricated transparent conductors have record-breaking characteristics: light transmittance of about 93 % (at a wavelength of 550 nm) with the sheet resistance of about 34 Ohm/sq. An important point is that the transmittance of the films with sheet resistance down to 30 Ohm/sq. exceeds 90 % in the wide spectral range (400–2500 nm), thus opening up great opportunities for applications of such nanomaterials in optoelectronics.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101429"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100760","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

Palladium nanoparticles: Potential for receptor-mediated chemotherapeutic drug delivery to cervical cancer cells

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2024.101428

Lorenzo Lance David, Moganavelli Singh

{"title":"Palladium nanoparticles: Potential for receptor-mediated chemotherapeutic drug delivery to cervical cancer cells","authors":"Lorenzo Lance David, Moganavelli Singh","doi":"10.1016/j.nanoso.2024.101428","DOIUrl":"10.1016/j.nanoso.2024.101428","url":null,"abstract":"<div><div>Novel therapeutic strategies are needed to mitigate the hurdles faced by traditional cancer therapy that involves surgery, chemotherapy, and radiotherapy. The advent of nanomedicine has led to the production of an array of nanomaterials for therapeutic delivery. Nanoparticles (NPs) are potential anticancer delivery systems due to their favorable physical and chemical characteristics. Palladium NPs (PdNPs) are easy to synthesize, stable, have low cytotoxicity and good biocompatibility, and can be modified for use in biomedicine. PdNPs were synthesized chemically and modified with the biopolymer chitosan and the targeting ligand transferrin (Tf). This was used to encapsulate the anticancer drugs doxorubicin (DOX) and 5-fluorouracil (5-FU) individually and as a dual-drug formulation. PdNPs were spherical, small (98.9 nm), and had good colloidal stability (zeta potential = −22.3 mV). High drug encapsulation efficiency (>70 %) was noted for both drugs, with a sustained release profile for the Tf-modified PdNPs at low pH for both drug formulations over 72 h. These PdNPs were targeted to a cervical cancer cell model (HeLa) that highly expresses the Tf receptor. Cytotoxicity was assessed on the human embryonic kidney (HEK293), breast adenocarcinoma (MCF-7), and HeLa cell lines. The anticancer activity confirmed the targeting specificity of the Tf-containing nanocomplexes to the HeLa cells, with good cell viability in the non-cancer (HEK293) cells. Tf-targeted nanocomplexes containing the dual-drug generated better anticancer activity than their non-targeted counterparts, confirming their potential as targeted therapeutic delivery vehicles that warrant further investigation.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101428"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical study of thermal performance of silica-aerogel/paraffin nanostructure in the presence of CuO nanoparticles: A molecular dynamics approach

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2025.101435

Ali B.M. Ali , Rasha Abed Hussein , Shahram Babadoust , Narinderjit Singh Sawaran Singh , Soheil Salahshour , Sh. Baghaei

{"title":"Numerical study of thermal performance of silica-aerogel/paraffin nanostructure in the presence of CuO nanoparticles: A molecular dynamics approach","authors":"Ali B.M. Ali , Rasha Abed Hussein , Shahram Babadoust , Narinderjit Singh Sawaran Singh , Soheil Salahshour , Sh. Baghaei","doi":"10.1016/j.nanoso.2025.101435","DOIUrl":"10.1016/j.nanoso.2025.101435","url":null,"abstract":"<div><div>The rise in air pollution and fuel costs increased the use of various renewable energy options. Currently, scientists face a significant challenge. Finding methods to store energy that can be easily converted is crucial. There is growing interest in using phase change materials for thermal energy storage systems. This interest stems from their ability to conserve energy and reduce air pollution. Silica aerogel effectively maintains the temperature of items over long periods. Phase change materials, recognized for storing thermal energy, are now favored for preserving both hot and cold temperatures. This study aimed to use computer simulations to understand the behavior of silica aerogel/PCM and CuO nanoparticles in a cube. The results show that the nanostructure can achieve a velocity of 0.0086 Å/fs and had a thermal conductivity of 1.85 W/m·K. These findings may have practical applications in heating and cooling systems, energy storage, and the aerospace industry.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101435"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156680","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

Synthesis of MWCNTs for successive polymeric and nano modification of a Nigerian bitumen, optimization using response surface methodology

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI: 10.1016/j.nanoso.2025.101444

Salawudeen Taofeeq Olalekan , Arinkoola Akeem Olatunde , Salam Kazeem kolapo , Jimoh Monsurat Omolola , Ogunkunle Samuel Akinlolu , Akinrinsa Samuel Damilare , Olufayo Augustina Olukemi , Ayanshola Ayanniyi Mufutau , Ogunleye Oladipupo Olaosebikan , Abdulkareem Ambali Saka

{"title":"Synthesis of MWCNTs for successive polymeric and nano modification of a Nigerian bitumen, optimization using response surface methodology","authors":"Salawudeen Taofeeq Olalekan , Arinkoola Akeem Olatunde , Salam Kazeem kolapo , Jimoh Monsurat Omolola , Ogunkunle Samuel Akinlolu , Akinrinsa Samuel Damilare , Olufayo Augustina Olukemi , Ayanshola Ayanniyi Mufutau , Ogunleye Oladipupo Olaosebikan , Abdulkareem Ambali Saka","doi":"10.1016/j.nanoso.2025.101444","DOIUrl":"10.1016/j.nanoso.2025.101444","url":null,"abstract":"<div><div>Polyethylene (PE) is attractive as a bitumen modifier for several reasons, the most important of which is cost. However, polymeric bitumen is highly sensitive to PE dosages and suffers thermal degradation. To develop a tougher, more ductile crack-resistant binder, a ternary mixture was formulated using PE-modified binder and Multi-Wall Carbon Nanotubes (MWCNTs). The conventional properties of PE-modified bitumen were optimized using a mixture design and Response Surface Methodology (RSM). MWCNTs (0.1 – 0.3 wt%), mixing time (20 – 40 min) and speed (1000 – 15000 rpm) were considered for ternary modification at 140 °C. The softening and penetration points as well as ductility were used to determine the best mix. MWCNT was synthesized using a carbon vapour deposition method and characterized using Transmission Electron Microscopy (TEM), which indicates cylindrical-shaped CNT with numerous walls; Thermogravimetric Analysis (TGA) indicates crystalline graphitic carbon with a weight loss of 25.96 %; X-ray Diffraction (XRD), which indicates graphene-like layers of tube walls at 2θ values of 25.89° and 44.53°. Brunauer-Emmett Teller (BET) shows surface area, pore size and pore volume of 0.62 m<sup>2</sup>/g, 15.91 nm and 0.00362 cm<sup>3</sup>/g, respectively. The developed models for the modified bitumen are predictive (R<sup>2</sup> greater than or equals to 0.94). The optimum mix design for polymeric bitumen was 4.07 wt% PE, and 95.83 wt% bitumen and 0.1 wt% MWCNT, 1500 rpm mixing speed and 37.7 min for the ternary bitumen. The relatively small absolute relative error between experimental and simulation indicated the reliability of the final models with a combined desirability of 0.77 – 0.87.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"41 ","pages":"Article 101444"},"PeriodicalIF":5.45,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156684","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