Advances in Natural Sciences: Nanoscience and Nanotechnology最新文献_第9页

Effect of Ar-plasma treatment and annealing on thermally evaporated β-In2S3 thin films ar等离子体处理和退火对热蒸发β-In2S3薄膜的影响

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-25 DOI: 10.1088/2043-6262/acd684

S. Rasool, K. Saritha, K. Reddy, M. Tivanov, O. Korolik, V. Gremenok, S. Zimin, I. Amirov

引用次数: 1

Polyurethane/halloysite nano tubes/sericin based electrospun nanocomposite for sustained drug release 聚氨酯/海洛石纳米管/丝胶基电纺纳米复合材料的药物缓释

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-19 DOI: 10.1088/2043-6262/acd3e6

M. Joshi, Sukumar Roy, Ayeshvaryaa Tv

{"title":"Polyurethane/halloysite nano tubes/sericin based electrospun nanocomposite for sustained drug release","authors":"M. Joshi, Sukumar Roy, Ayeshvaryaa Tv","doi":"10.1088/2043-6262/acd3e6","DOIUrl":"https://doi.org/10.1088/2043-6262/acd3e6","url":null,"abstract":"In this study, the feasibility of the production of electrospun nanofibre composite mainly for biomedical applications is reported. Biocompatible polyether-based polyurethane, natural proteinaceous polymer silk sericin (SS) and natural inorganic nanoclay halloysite as a drug carrier with a model drug chlorhexidine acetate were used to produce nanofibres by electrospinning technique. Sericin was extracted from Bombyx mori silk cocoons by high pressure high temperature (HT-HP) degumming. Chlorhexidine acetate (CA), an antimicrobial agent, was loaded into halloysite nanotubes (HNTs) at different weight ratios, and 1:1 weight ratio showed the maximum loading which was confirmed by TGA and XRD analysis. Electrospinning of polymer solution with different compositions of polyurethane, sericin, CA and CA-HNTs was conducted at 10% w/v concentration, 20 kV voltage, 15 μl min−1 flow rate and 10 cm distance which resulted in the formation of bead-free uniform fibres. Antimicrobial activity of nanofibrous webs was evaluated by the disc diffusion method (AATCC 90) and it was found that CA and CA-HNT loaded nanofibres show sustained antibacterial action against both the Gram-positive (S. aureus) and Gram-negative (E. coli) bacteria. The CA-HNT and sericin/CA-HNT loaded nanofibres showed controlled release of CA. In addition, the cytocompatibility assessment of developed nanofibrous composites showed good biocompatibility. Hence the produced composite nanofibre can serve as an excellent material for sustained drug release for various biomedical applications.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45635295","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

Upgrading gold to green nanoparticles: applications in prostate cancer 将金纳米粒子升级为绿色纳米粒子：在前列腺癌症中的应用

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-18 DOI: 10.1088/2043-6262/acd0aa

Nadim Mitri, K. Rahme, G. Fracasso, E. Ghanem

{"title":"Upgrading gold to green nanoparticles: applications in prostate cancer","authors":"Nadim Mitri, K. Rahme, G. Fracasso, E. Ghanem","doi":"10.1088/2043-6262/acd0aa","DOIUrl":"https://doi.org/10.1088/2043-6262/acd0aa","url":null,"abstract":"Green nanotechnology produces biocompatible gold nanoparticles (AuNPs) with intrinsic anti-microbial, anti-viral, and anti-tumour properties. Green AuNPs (g-AuNPs) are gaining a solid ground in prostate cancer (PC) nanotherapy. Hence, in this review, we summarise and compare data from studies published between 2015 and 2022 to highlight major biological compounds and outputs from in vitro and in vivo applications of green or biosynthesised AuNPs in PC theranostics. In fact, g-AuNPs can be easily generated with effective antiproliferative PC characteristics. Taken together, g-AuNPs exert various apoptosis-related mechanisms, such as reactive oxygen species (ROS) generation, cell cycle arrest, cytotoxicity, mitochondrial disruption, and anti-tumour immune cell activation, with additional successful delivery of the biological compounds in green materials. g-AuNPs could offer another modality for targeted cancer therapy using antibodies and targeting ligands to specifically recognise and destroy PC tumours. In conclusion, g-AuNPs applications drive forth sustainable nanotechnology while minimising ethical concerns and toxicity risks in clinical trials.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46211376","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

Antibacterial activity of green synthesized ZnO nano-flower using pineapple peel extract 菠萝皮提取物制备绿色ZnO纳米花的抗菌活性

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-17 DOI: 10.1088/2043-6262/acd240

A. S. Rini, T. Linda, Y. Hamzah, L. Umar, M. Sari, Y. Rati

{"title":"Antibacterial activity of green synthesized ZnO nano-flower using pineapple peel extract","authors":"A. S. Rini, T. Linda, Y. Hamzah, L. Umar, M. Sari, Y. Rati","doi":"10.1088/2043-6262/acd240","DOIUrl":"https://doi.org/10.1088/2043-6262/acd240","url":null,"abstract":"Plant-based nanoparticles provide significant advantages over conventional physico-chemical techniques in medicine and biology. This paper reports the green route to synthesise ZnO particles using pineapple peel extract at various zinc precursor concentrations and evaluate their antibacterial activity. Morphological, structural, and optical properties of ZnO were characterised using SEM, XRD, FTIR, and UV–vis. The antibacterial potential of ZnO particles was evaluated against two clinical strains of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) using the paper disc diffusion method. SEM images exhibit flower-like ZnO with diameters in the range of 331–538 nm. The hexagonal wurtzite crystal phase of ZnO has been confirmed by XRD analysis with a crystal size of 14–17 nm. The FTIR spectrum has also validated the Zn-O bonding and the presence of additional functional groups in the samples. Antibacterial activity of the nanoflower ZnO towards E. coli and S. aureus displays inhibitory zone widths of 17.23 ± 3.03 mm and 30.14 ± 1.86 mm, respectively. These findings reveal that nanoflower ZnO produced using the pineapple peel extract exhibited a large bacterial inhibition zone, indicating that it is potentially used as food packaging or antibiotics.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41571383","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: 2

A method for alleviating the effect of pinhole defects from silicon nitride film in n-type rear-junction PERT silicon solar cells 一种减轻n型后结PERT硅太阳能电池中氮化硅薄膜针孔缺陷影响的方法

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-16 DOI: 10.1088/2043-6262/acd241

V. Sharma, Yash Pal, H. Dhasmana, A. Verma, Bidyut B. Barman, R. Sahu, Vivek Kumar, V. Jain

{"title":"A method for alleviating the effect of pinhole defects from silicon nitride film in n-type rear-junction PERT silicon solar cells","authors":"V. Sharma, Yash Pal, H. Dhasmana, A. Verma, Bidyut B. Barman, R. Sahu, Vivek Kumar, V. Jain","doi":"10.1088/2043-6262/acd241","DOIUrl":"https://doi.org/10.1088/2043-6262/acd241","url":null,"abstract":"We investigated incorporation of a novel approach of phosphorous silicate glass layer thinning (PGT) process in the N-PERT process flow to minimise pinhole defects at the silicon nitride (Si3N4) surface. The thinning (PGT) process for optimum HF deposition time of 12 min resulted in excellent cell efficiency of ∼20.55% with pinhole free layer and high electrical yield (∼0% for I Rev > 1.5 A). After optimising technology, stability is also explored with and without PGT process line, which confirms advantages of this approach. This significant reverse failure reduction due to the proposed PGT process can eventually help in improving overall cell performance of the N-PERT devices. This process can be a part of strategy for reducing process cost of solar cell in any industrial mass production line with improved yield (reduction in reverse failure from 6.6 to 1.5% for one month of mass production). Thus, the PGT process with negligible electrical rejection and high yield increases the possibility of high throughput in mass production line.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44511251","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

Hydrodynamic and transport behavior of solid nanoparticles simulated with dissipative particle dynamics 用耗散粒子动力学模拟固体纳米粒子的流体动力学和输运行为

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-15 DOI: 10.1088/2043-6262/acc01e

Jeffery Haugen, Jesse D. Ziebarth, E. Eckstein, M. Laradji, Yongmei Wang

{"title":"Hydrodynamic and transport behavior of solid nanoparticles simulated with dissipative particle dynamics","authors":"Jeffery Haugen, Jesse D. Ziebarth, E. Eckstein, M. Laradji, Yongmei Wang","doi":"10.1088/2043-6262/acc01e","DOIUrl":"https://doi.org/10.1088/2043-6262/acc01e","url":null,"abstract":"Inertial migration of micro- and nanoparticles flowing through microchannels is commonly used for particle separation, sorting, and focusing on many lab-on-a-chip devices. Computer simulations of inertial migration of nanoparticles by mesoscale simulation methods, such as Dissipative Particle Dynamics (DPD) would be helpful to future experimental development of these lab-on-a-chip devices. However, the conventional DPD approach has a low Schmidt number and its ability to model inertial migration is questioned. In this work, we examine the ability of DPD simulations to investigate the inertial migration of rigid nanoparticles flowing through a slit channel. By varying the exponent and cutoff distance in the weight function of the random and dissipative forces, DPD models with Schmidt number varying between 1 and 370 were examined. We show that solvent penetration into nanoparticles and solvent-induced attraction between nanoparticles can be controlled by choosing appropriate interaction coefficients of the DPD conservative force and that these properties are not influenced by the Schmidt number of the DPD model. On the other hand, hydrodynamic properties and transport behaviour of rigid nanoparticles are influenced by the Schmidt number. With the conventional DPD model, nanoparticles tend to be evenly distributed across the channel and do not remain in steady-state positions during flow. At high Schmidt numbers, the particles migrate to long-lasting steady-state positions located between the channel center and walls, in agreement with known experimental observations. We conclude that to properly simulate inertial migration, modifications to the conventional DPD model that yield a high Schmidt number are required.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49522540","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 V2O5-MgO/TiO2 mixed oxide nanocomposites for photocatalytic treatment of CO in vehicle exhaust emissions 用于光催化处理汽车尾气中CO的V2O5-MgO/TiO2混合氧化物纳米复合材料的合成

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-11 DOI: 10.1088/2043-6262/acd23f

Van Tien Mai, T. O. Doan, Binh Pham, T. Le, T. Duong, Viet Anh Pham Ba

{"title":"Synthesis of V2O5-MgO/TiO2 mixed oxide nanocomposites for photocatalytic treatment of CO in vehicle exhaust emissions","authors":"Van Tien Mai, T. O. Doan, Binh Pham, T. Le, T. Duong, Viet Anh Pham Ba","doi":"10.1088/2043-6262/acd23f","DOIUrl":"https://doi.org/10.1088/2043-6262/acd23f","url":null,"abstract":"Photocatalytic nanotechnology is one of the techniques that brings many new breakthroughs since it possesses high potential for the supply of clean energy and the degradation of persistent organic pollutants in the environment. The drawback of photocatalytic materials such as TiO2, ZnO, V2O5 is the activation only under ultraviolet light. To extend the applicability of photocatalytic nanomaterials to a visible light region, recent research has focused on the modification of semiconducting photocatalysts. In this study, V2O5-MgO/TiO2 mixed oxide nanocomposites were synthesised via a sol-gel method by using polyvinyl alcohol as a gelling agent. The basic structural characteristics of nanocomposites were determined by analytical techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET, energy dispersive x-ray (EDX), x-ray diffraction (XRD), infrared (IR) and ultraviolet-visible (UV–vis) spectroscopy. The results obtained from EDX and XRD analyses indicate that V2O5 and MgO particles with a size between 14.5 and 21.3 nm were formed and uniformly dispersed in TiO2 phases. Moreover, the effects of oxide weight ratios, illuminating conditions and reaction time on the photocatalytic activity of the nanocomposites were investigated via CO conversion with the input CO concentrations of 8000 ppm. Significantly, the V2O5-MgO/TiO2 nanocomposites were used for treating CO in motorcycle exhaust fumes. The efficiency of the process reached 82% for 10 min, indicating the potential applicability of the V2O5-MgO/TiO2 nanocomposites for the CO treatment of industrial emissions.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43555037","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: 1

Surface modification of PVA/Chitosan/PEG/HAp nanofiber scaffolds by plasma treatment and studies of their morphology, wettability, and biodegradation rate PVA/壳聚糖/PEG/HAp纳米纤维支架的等离子体表面改性及其形态、润湿性和生物降解率的研究

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-05-03 DOI: 10.1088/2043-6262/accc7b

Hartatiek, M. I. Wuriantika, S. Amalia, Masruroh, Yudyanto, M. Nurhuda, D. Santjojo

引用次数: 0

Enhanced ferroelectric and ferromagnetic properties of xNiFe2O4/(1–x)Ba0.94Ca0.06Ti0.975Zr0.025O3 nanocomposites xNiFe2O4/(1-x)Ba0.94Ca0.06Ti0.975Zr0.025O3纳米复合材料的铁电和铁磁性能增强

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-04-27 DOI: 10.1088/2043-6262/accc7a

Dinh Chi Linh, D. S. Lam, Nguyen Thi Viet Chinh, D. D. Dung, Ngo Tran, T. D. Thanh

{"title":"Enhanced ferroelectric and ferromagnetic properties of xNiFe2O4/(1–x)Ba0.94Ca0.06Ti0.975Zr0.025O3 nanocomposites","authors":"Dinh Chi Linh, D. S. Lam, Nguyen Thi Viet Chinh, D. D. Dung, Ngo Tran, T. D. Thanh","doi":"10.1088/2043-6262/accc7a","DOIUrl":"https://doi.org/10.1088/2043-6262/accc7a","url":null,"abstract":"Bi-phase multiferroic composites of NiFe2O4/Ba0.94Ca0.06Ti0.975Zr0.025O3 (BCTZ/NFO) were successfully fabricated by high-energy ball milling combined with heat treatment. X-ray diffraction patterns and Raman spectra confirmed the successful coexistence of BCTZ and NFO phases in the final composites, which had an average particle size of 50 nm. However, the number of large particles increased with the increased NFO concentration in the composites. Optical properties of the composites were also modified by the NFO content, where the absorption band tended to the visible region and band-gap energies (E g) decreased with the increase of NFO. Ferromagnetic and ferroelectric properties of the BCTZ/NFO composites were also tuned by NFO additive content. Both saturation magnetisation (M s) and remnant magnetisation (M r) increased with the increase of NFO content, where the maximum values of M s = 22.52 emu g−1 and M r = 1.48 emu g−1 for composites with 40% NFO concentration, while coercivity (H c) was maintained at about 60 Oe. Maximum polarisation (P max), remnant polarisation (P r), and coercive field (E c) values all increased with NFO concentration, with 10% NFO providing the highest P max (= 0.249 μC cm−2) and P r (= 0.116 μC cm−2) values, and 30% NFO providing the highest E c (= 1.720 kV cm−1) value with a maximum applied voltage of 1 kV. Therefore, the multiferroic properties of BCTZ/NFO composites could be enhanced with an appropriate concentration of NFO, which led to a wide range of practical applications in the advanced electronic device field.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44861896","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: 1

Chitosan and Aloe Vera decorated nanoparticulate system loaded with Minoxidil as a suggested topical formulation for alopecia therapy 壳聚糖和芦荟修饰的米诺地尔纳米颗粒系统作为脱发治疗的推荐局部制剂

IF 2.1

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2023-04-27 DOI: 10.1088/2043-6262/accc7e

Ebtesam A. Mohamad, Amany M Gad, Rana H. Abd El-Rhman, M. M. Darwish

{"title":"Chitosan and Aloe Vera decorated nanoparticulate system loaded with Minoxidil as a suggested topical formulation for alopecia therapy","authors":"Ebtesam A. Mohamad, Amany M Gad, Rana H. Abd El-Rhman, M. M. Darwish","doi":"10.1088/2043-6262/accc7e","DOIUrl":"https://doi.org/10.1088/2043-6262/accc7e","url":null,"abstract":"Minoxidil (Mxd) is a common medication used for hair regrowth in patients exhibiting different types of alopecia, especially androgenetic alopecia (AGA), but it has some negative aspects such as causing adverse effects and having limited permeation through the outer skin layers. In this study, minoxidil was encapsulated into niosomes and then loaded into chitosan nanoparticles and Aloe vera for creating a nanocomposite (Cs@Alo/Nio-Mxd), which will be used as a topical formulation to overcome these difficulties. The various prepared samples were physico-chemically characterised by their loading efficiency, TEM, SEM, zeta potential, FTIR and in vitro release profiles. The hair growth potential of the prepared formulations was evaluated by an in vivo study using rats with induced alopecia. Thirty-six rats with induced alopecia were randomised into six groups of six rats each. Group 1 (Negative control): rats served as normal and were treated with normal saline, Group 2: rats were treated with topical application of empty nanocomposites. Group 3 (Positive control): rats were treated with topical application of 5% Mxd, Group 4: rats were treated with topical application of (Cs-Mxd NPs), Group 5: rats were treated with topical application of (Cs@Alo-Mxd NPs). Group 6: rats were treated with topical application of (Cs@Alo/Nio-Mxd) nanocomposite. All formulations were applied once daily for 21 days. The treated skin was observed, photographed, and its histological features were examined. Results specified that Cs@Alo/Nio-Mxd nanocomposite could be preferentially deposited into the hair follicles, causing a significant increase (p < 0.05) in skin thickness, total hair follicle number per field, hair follicle diameter, hypodermis hair follicle number and anagen induction percentage.","PeriodicalId":7359,"journal":{"name":"Advances in Natural Sciences: Nanoscience and Nanotechnology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45128467","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: 2