Nanoscience and Nanotechnology - Asia最新文献

{"title":"Substitutional Tungsten doping in Silicon Carbide introducing magnetic properties: A Computational DFT Approach","authors":"P. Patnaik, Dipan kumar Das, Subhraraj Panda, G. Mukhopadhyay","doi":"10.2174/2210681212666220826145003","DOIUrl":"https://doi.org/10.2174/2210681212666220826145003","url":null,"abstract":"\u0000\u0000Small concentration of magnetic material, in general the transition metal atoms (TM) when doped into a semiconductor, it behaves as a diluted magnetic semiconductor (DMS). It has an application to Quantum computing & spintronic devices. DMS silicon carbide have strong coupling and high Curie temperature. The magnetic and electronic properties of SiC with TMs impurities have been in focus for theoretical and experimental researchers.\u0000Objective\u0000\u0000\u0000\u0000The objective of this work is to study the electrical and magnetic properties of tungsten doped cubic SiC. Comparing the density of states plot with and without impurity, the change in property happening due to the presence of tungsten is observed. Partial density of states, are also plotted and interpreted. Self-consistent spin polarized calculations are done to study the magnetic properties. Magnetic Moment is also calculated for substitutional doping of SiC at different sites.\u0000\u0000\u0000\u0000Tungsten doped 3C-SiC is investigated by using the first-principle energy code, Quantum Espresso that uses pseudopotential within Density Functional Theory (DFT). The calculations are done by density functional pseudopotential energy calculations in periodic systems by solving iteratively the Kohn Sham equation in a plane wave basis set. Both norm conserving and Vanderbilt USPP are used. Self-consistent iterations were performed until a convergence of total energy and total charge was obtained. We used different k-point meshes for different supercells with 16, 54 and 128 atoms giving results for carious impurity percentages.\u0000\u0000\u0000\u0000The formation energy values obtained indicate that W impurity prefers Si site than C site in cubic SiC. Presence of a narrow band towards the conduction band minimum is due to the W-d states for Si site substitution. Both spin-up and spin-down states contribute towards the valence band and a small contribution goes towards the conduction band. The magnetic moment values for C site substitution is lower than Si site substitution.\u0000\u0000\u0000\u0000It is observed when W doped with Si site of cubic silicon carbide shows ferromagnetic behavior. Hence, there is a possibility of 3C SiC doped with W at C site to behave as a semi- insulating material\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83052867","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}

{"title":"Varying Effects Of Iron Oxide Nanoparticles (IONPs) On The Bacterial Cells","authors":"Umme Jouvairiya, Mehar Fatima Alvi, Soban Ahmad Faridi, K. Osama, A. Vimal","doi":"10.2174/2210681212666220822123017","DOIUrl":"https://doi.org/10.2174/2210681212666220822123017","url":null,"abstract":"\u0000\u0000Nanoparticles have a wide range of responsive reactions in bacterial cells depending on their characteristics. They interact with organisms at a cellular level and are capable of producing unexpected reactions depending on their own and cell’s morphological features. Some functions provide betterment of cells and some cause disruptions in the cell functioning or exhibit toxicity for them. Nanoparticles, depending on their toxicity, can also cause alterations in cellular physiology. Different nanoparticles affect different biological species in different ways. As a result, a comprehensive investigation is necessary for all types of nanoparticles to demonstrate their beneficial and harmful effects on various species in terms of growth, inhibition, toxicity, and death. In this review, we have only focused on the iron nanoparticle and their effects on the bacterial cells as they are the most commonly used nanoparticle in biology and microbiology because of their unique physicochemical properties (size, shape, stability, etc.). These properties of NPs allow them to react with the bacterial cell surfaces and create a response (which can either support the growth of the bacteria or cause an anti-bacterial or anti-microbial effect on them). These properties are also changeable if we alter the morphological features of the NPs. Studies have shown improvement of microbiological reaction rates by using magnetic nanoparticles. However, nanoparticle toxicity is the major area of concern, as it can decrease therapeutic efficiency and cause adverse effects. Considering the wide range of responses and their reasons, this review summarizes the effects an iron oxide nanoparticle can have on the bacterial cell in general, the factors that influence those effects, and the relation of NP's characteristics to their significant differences in effects on bacteria.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78440253","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}

{"title":"Heavy Metal Removal with NanoTiO2/Chitosan Modified Poly(Vinylidene Chloride)","authors":"Sadeaka A. Ahmed, Mahmoud M. El-Bordiny, A. El-Sebaay, A. El-Ella, Mohamed A. Tag El-Din, Y. Attia","doi":"10.2174/2210681212666220819111215","DOIUrl":"https://doi.org/10.2174/2210681212666220819111215","url":null,"abstract":"\u0000\u0000Heavy metal contamination of water resources has been identified as one of the most serious environmental issues. Chemical modification of hydrophobic polymer matrices is another approach for changing their surface properties for water treatment. The addition of nanoparticles to polymers alters surface characteristics such as adsorption capacity, adhesion, catalytic ability, and wettability to heavy metals in wastewater.\u0000\u0000\u0000\u0000Evaluation of the nanomodified polyvinyl chloride (PVC) polymer as a heavy metal adsorbent from wastewater.\u0000\u0000\u0000\u0000In the field of emission discharges from industries and domestic wastes that contain unknown inorganic pollutants by PVC using grafting chitosan/TiO2 nanocomposites. The characterization of different thin films was performed using TEM, XRD, and FTIR. The metals concentrations were measured by using inductively coupled plasma (ICP-OES).\u0000\u0000\u0000\u0000Nanomodification of PVC was evaluated by infrared spectroscopy. The presence of chlorine in the PVC structure before and after the nanomodification is confirmed by the presence of a peak at 690 cm−1 attributed to the axial deformation of the C-Cl bond. The nanomodified PVC showed an ion exchange capacity of 1.27 mmol−1, and efficiently removed the heavy metals from aqueous solutions. The heavy metal removal effectiveness (R) was improved by increasing the concentration of TiO2 nanoparticles. The amount adsorbed per gram of adsorbent (Qe) was computed and revealed that the amount of adsorption increased for nanomodified PVC thin film as compared to 100% PVC thin film. The nanomodified PVC thin film showed high stability for 4 cycles of use. This improvement has been attributed to the nanomodified PVC polymer's large surface area (ranging from 0.3 to 282 m2/g).\u0000\u0000\u0000\u0000The modification of PVC with nanoparticles increases the cost of PVC thin film by 15%. However, it offers efficiency 3 times than the original PVC.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82402922","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}

{"title":"Validated Reverse Phase-High-Performance Liquid Chromatography Method for Simultaneous Determination of Vanillic acid and Glyburide in amphiphilic polymeric micelles","authors":"J. Kaur, M. Gulati, N. K. Pandey, B. Kumar, Saurabh Singh, S. Singh","doi":"10.2174/2210681212666220816142200","DOIUrl":"https://doi.org/10.2174/2210681212666220816142200","url":null,"abstract":"\u0000\u0000A new sensitive and rapid reverse phase HPLC method was developed for the simultaneous determination of vanillic acid (VA) and glyburide in the formulation and validated according to (ICH) Q2 (R1) guidelines.\u0000\u0000\u0000\u0000The HPLC analysis was performed using the C-18 reverse phase column and a mobile phase consisting of acetonitrile and orthophosphoric acid (0.1% v/v) of ratio 70:30 v/v at 1 mL/min of flow rate. The detection was performed at the wavelength (λ) of 234 nm (isosbestic point), and the retention time of VA and glyburide was found around 2.6 and 5.4 min. The calibration plot gave a linear relationship over the concentration range of 2–10 µg/mL with a regression coefficient of 0.999. The LOD and LOQ for VA were 0.34 and 1.04 μg/mL, while for glyburide it was 0.38 µg/mL and 1.17 µg/mL respectively. The accuracy of the proposed method was determined by recovery studies and was in the range of 95% to 105%. The RSD% of the determination of precision was <2%.\u0000\u0000\u0000\u0000The results of the robustness study were within the acceptable limits in response to changes in flow rate, ratio of mobile phase, and pH. The method was successfully applied for the determination of EE% and drug release from amphiphilic polymeric micelles.\u0000\u0000\u0000\u0000The EE% of both the drugs prepared in a liquid formulation of amphiphilic polymeric micelles was found to be greater than 90%. The results of drug release studies indicated almost 100% VA and 85.3% glyburide release using pH-gradient method within 4 and 48 h respectively.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76294112","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}

{"title":"Developments in Perovskite materials based Solar Cells: In Pursuit of Hysteresis Effect, Stability issues and Lead-Free based perovskite materials","authors":"Z. Hasan, Siddharth Joshi, K. M. Subbaya, N. Elangovan","doi":"10.2174/2210681212666220718125121","DOIUrl":"https://doi.org/10.2174/2210681212666220718125121","url":null,"abstract":"\u0000\u0000Over the past few years, significant advances in science and technology have occurred in the field of perovskite-based solar cells (PSC), which has sparked significant interest in next-generation photovoltaic technologies. Perovskite solar cells, which have a current certified power conversion efficiency of 25.5 %, are the first solution processed photovoltaic to outperform silicon-based photovoltaic technologies. Perovskite solar cells are comparable to Silicon-based solar cells due to their low-cost fabrication techniques and high efficiency. Nevertheless, the research community is still concerning about future design optimization, series degradation issues, stability, and practical efficiency restrictions. As a result, comprehensive knowledge of the perovskite solar cell's operating mechanism and operating principles is more important than ever before applying these technologies in the real world for future optimization. Recent research findings in the material science of innovative halide perovskites, as well as numerous architectures based on alternative materials for lead-free perovskites, band-gap engineering, impact of materials on various electron transport layers (ETL) and hole transport layers (HTL), the device instability and J-V hysteresis issues of perovskite solar cells are the focus of this study. In order to better understand the potential of perovskite solar cell, factors such as hysteresis-inducing factors, interface engineering, device stability, and a variety of recombination processes are being investigated. For future optimization of perovskite solar cells, the following review findings provide a clear focus for current research needs and future research directions to address issues and understand the working potential of the perovskite solar cell.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"102 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78080104","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}

{"title":"Fabrication and Applications of Raft Forming System - An Emerging Trend in Gastroretentive Drug Delivery System","authors":"Dipthi Shree, C. Patra, B. Sahoo","doi":"10.2174/2210681212666220707141136","DOIUrl":"https://doi.org/10.2174/2210681212666220707141136","url":null,"abstract":"\u0000\u0000In the past several decades, the gasto-retentive drug delivery system is considered as a novel approach and has gained immense popularity in the field of novel drug delivery systems. Among several approaches to achieve gastric retention raft forming system which comes under the classification of floating drug delivery system is a subject of special research interest. This advanced drug delivery system has the potential to attain a prolonged and predictable drug delivery at specific sites of the GI tract mainly in the stomach and intestine thereby exhibiting a relatively constant plasma profile. Thus, the floating raft forming system finds useful over conventional therapeutics to treat several gastrointestinal disorders viz., gastro esophageal reflux disorder, acid reflux, peptic ulcer, oesophagitis, etc.\u0000\u0000\u0000\u0000In this current manuscript, an extensive search is performed for original research papers using databases viz., Google Scholar, PubMed, Science Direct, etc. Further, painstaking efforts are made to compile and update the recent findings of the formulation scientists working exclusively in the area of raft forming systems. This article portrays a detailed survey about several applications of raft forming systems in the form of tables.\u0000\u0000\u0000\u0000The floating raft forming system has the potential for controlled drug release in the upper part of the GI tract and exerts improved bioavailability of the medications having a narrow absorption window. Thus, it is concluded that this advanced dosage form is the caliber candidate for the treatment of several gastrointestinal ailments.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74786364","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}

{"title":"Assessment of Shear Bond Strength and Cytotoxicity of Orthodontic Adhesive with Addition of Silver Nanoparticles in Varying Concentrations","authors":"C. Soans, K. Shashidhar, S. Shersha, R. Mansoor, Gauthami","doi":"10.2174/2210681212666220630160535","DOIUrl":"https://doi.org/10.2174/2210681212666220630160535","url":null,"abstract":"\u0000\u0000Prolonged treatment with fixed orthodontic appliances tend to compromise oral hygiene maintenance in patients, increasing their susceptibility to white spot lesions and caries. Incorporating silver nanoparticles into adhesives and orthodontic appliances is known to improve its antimicrobial properties.\u0000\u0000\u0000\u0000The aim of the present study was to assess and compare the bond strength of orthodontic adhesive when Silver Nanoparticles were added in varying concentrations and also to assess their cytotoxicity on periodontal ligament fibroblasts.\u0000\u0000\u0000\u0000Various concentrations of silver nanoparticles (1%, 5%, 10%w/w) were incorporated into Transbond XT composite adhesive and their shear bond strength and cytotoxicity were compared to a control group. Brackets were bonded to extracted premolar teeth and shear bond strength was assessed using Instron Universal Testing Machine. The viability of periodontal ligament fibroblasts was assessed after incubating with the experimental composite for 24 hours and 1 week using MTT assay.\u0000\u0000\u0000\u0000There was a decrease in the shear bond strength when 1% and 5% of silver nanoparticles were incorporated into the adhesive.However, it was within the clinically recommended range for bonding brackets. When the concentration was increased to 10%, the SBS was not acceptable for orthodontic bonding. The composite incorporated with silver nanoparticles was cytotoxic to fibroblasts at all concentrations at both time intervals.\u0000\u0000\u0000\u0000The shear bond of orthodontic adhesive with nanosilver is comparable to plain transbond XT in low concentrations, however, the addition of silver nanoparticles seems to increase the time-bound cytotoxicity of orthodontic adhesive.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76350010","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}

{"title":"Nano-surface functionality of zinc ferrite: ascorbic acid nanofluid application in enhanced oil recovery","authors":"B. Guan, Muhammad Darwisy Hakim, Kurnia Hastuti, Mohamad Amin Bin Hamid","doi":"10.2174/2210681212666220622120951","DOIUrl":"https://doi.org/10.2174/2210681212666220622120951","url":null,"abstract":"\u0000\u0000The compromising effect of reservoir’s compositions on the acceleration of oil towards the production center during recovery efforts in both primary and secondary applications prelude to the application of nanofluid in the oil industry.\u0000\u0000\u0000\u0000This study explores the efficacy of Ascorbic acid on the surface of Zinc Ferrite nanoparticles in interfacial tension (IFT) and wettability modification.\u0000\u0000\u0000\u0000The use of co-precipitation method for the synthesis of Zinc Ferrite nanoparticles (ZNP) was successful at varying temperatures. Consequently, ascorbic acid NPs were coated on ZNP and their brine based nanofluid was prepared.\u0000\u0000\u0000\u0000The effects of calcination temperature on the morphology, structure and the crystallinity size were investigated. In concentration influence determination, wettability alteration (W.A) was the most affected mobility factor at 0.15M. However, at 0.25M higher concentration, the IFT, W.A and nanofluid’s stability were relatively improved significantly.\u0000\u0000\u0000\u0000This research enhances our understanding of ascorbic acid effect on ZNP and the fascinating impact of their combined usage as enhanced oil recovery agent. Ascorbic acid improved the efficiency of the coated ZnFe2O4 nanoparticles on IFT and contact angle.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80790990","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}

{"title":"A Review of the Construction of the Nanomaterial & Nanocomposite Based Biosensor for Different Applications","authors":"Fahad Munshe, Md. Arifur Rahman Khan","doi":"10.2174/2210681212666220618164341","DOIUrl":"https://doi.org/10.2174/2210681212666220618164341","url":null,"abstract":"\u0000\u0000The heightened attention about food and health safety has prompted researchers to conduct extensive research on biosensors that can be used to detect foodborne microbial toxins and pathogens quickly. Biosensors are proven to be a blessing due to their simple, and cost-effective technique, albeit there are still some drawbacks with respect to detection time, detection limit, and resilience. Incorporating functionalized nanomaterials into the development of biosensors as catalytic tools, immobilization platforms, or optical or electroactive labels has added a new dimension to addressing these challenges. This review paper aims to discuss the construction of different types of nanomaterial-based biosensors in the domains of food safety, exosome detection and finally, cancer detection as well as highlights the advantages of these biosensors over traditional techniques. In addition, a comparative study between the nanomaterial based biosensors taking into account the linear range and limits of detection in these mentioned applications was also conducted. Hence, this paper provides key insights into designing and fabricating biosensors utilizing the nanomaterials, and opens new avenues in disease and food safety research.\u0000","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76447230","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}

{"title":"Raman Response Function of AlGaAs Doped Glass","authors":"Abhishek Kumar, P. Gupta, M. Mishra, Brajraj Singh, Mohit Sharma","doi":"10.2174/2210681212666220615101100","DOIUrl":"https://doi.org/10.2174/2210681212666220615101100","url":null,"abstract":"<jats:sec>\u0000<jats:title />\u0000<jats:p />\u0000</jats:sec>","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82131381","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}