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International Journal of Nanoparticles最新文献

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Bactericidal effect of silver nanoparticles from aqueous root extracts of Catharanthus roseus 花楸根水提物中纳米银的杀菌效果
International Journal of Nanoparticles Pub Date : 2019-12-17 DOI: 10.1504/ijnp.2019.10025865
V. Subha, Ernest Ravindran, Athul Balaji Hemant Kumar, S. Renganathan
{"title":"Bactericidal effect of silver nanoparticles from aqueous root extracts of Catharanthus roseus","authors":"V. Subha, Ernest Ravindran, Athul Balaji Hemant Kumar, S. Renganathan","doi":"10.1504/ijnp.2019.10025865","DOIUrl":"https://doi.org/10.1504/ijnp.2019.10025865","url":null,"abstract":"In this study, green synthesis of silver nanoparticle (AgNPs) is synthesised using aqueous root extract of Catharanthus roseus as a reducing as well as capping agent. The bioactive molecules present in the root extract such as alkaloids, flavonoids, carbohydrates, amino acids and phenolic compounds were found to be responsible for the reducing and capping of nanoparticles. Stable nanoparticles were observed after the addition of aqueous root extract into the silver nitrate solution. Biotransformation of the silver nitrate to silver nanoparticles were investigated by UV-visible spectroscopy (UV) and found that the surface plasmon resonance of the nanoparticles is a shallow peak at 490 nm. XRD pattern shows the crystalline nature of silver nanoparticle. Highly mono dispersed silver nanoparticles within 100 nm rage was revealed from TEM. The activity of the silver nanoparticles against microbes were found to be higher in the zone of inhibition in all the species used for the studies.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41746334","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
Silicon-based core-shell nanoparticle's nanobiomedical characterisation 硅核壳纳米粒子的纳米生物医学表征
International Journal of Nanoparticles Pub Date : 2019-12-17 DOI: 10.1504/ijnp.2019.10025864
F. Sana, Farshad Farhadnia, A. Salmanogli
{"title":"Silicon-based core-shell nanoparticle's nanobiomedical characterisation","authors":"F. Sana, Farshad Farhadnia, A. Salmanogli","doi":"10.1504/ijnp.2019.10025864","DOIUrl":"https://doi.org/10.1504/ijnp.2019.10025864","url":null,"abstract":"Using functionalised nanoparticles in nanobiomedical applications cause to raise questions about unintentional effect of such powerful agents on the human body. In other words, the study of nanoparticle toxicity can be considered as a curtail key for the biological applications. In this study, the core/shell nanoparticles such as Si/Au and SiO2/Au were synthesised and functionalised with some biological elements. For satisfying some medical standards and biomedical critical test conditions, a few in-vitro assays as cytotoxicity and haemolysis should be done. For this reason, cytotoxicity and haemolytic effects of the functionalised nanoparticles such as Si/Au/biotin and SiO2/Au/biotin and their derivatives were evaluated on Hep-G2 cells and humane red blood samples. It is shown that cytotoxicity and haemolysis effects of the all synthesised nanoparticles are concentration-dependent. Also, the results are shown that most cytotoxicity and haemolytic effects are observed for Si/Au and SiO2/Au without biotin groups after 48 hours and 30 minutes, respectively.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48265508","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 novel approach for computation of cosine function 一种计算余弦函数的新方法
International Journal of Nanoparticles Pub Date : 2019-12-17 DOI: 10.1504/ijnp.2019.10025863
A. Hasnat, D. Bhattacharjee, A. Hoque, Santanu Halder
{"title":"A novel approach for computation of cosine function","authors":"A. Hasnat, D. Bhattacharjee, A. Hoque, Santanu Halder","doi":"10.1504/ijnp.2019.10025863","DOIUrl":"https://doi.org/10.1504/ijnp.2019.10025863","url":null,"abstract":"Objective of trigonometric function approximation in digital systems are faster computation in less number of clock cycles, optimising hardware resources, accuracy in more number of bits, etc. This study proposes a novel method for cosine function computation and respective FPGA-based architecture. A triangle is presumably located in the first quadrant of a circle with unit radius whose one vertex is the centre, other two vertices touches the perimeter. Using the area of the triangle, it is observed that the y coordinate of the third vertex of the triangle is the sine value. The error is the difference between arch length and side length. Newton's interpolation method is used to formulate the error approximation function. This method is synthesised on Xilinx Spartan 3 xc3s200-5ft256 FPGA kit. The proposed method gives accuracy up to 14 bits or more in 96% cases in 11 clock cycles only at maximum speed of 89.977 MHz.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49430412","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
Microwave assisted green synthesis of ZnO and Ag doped ZnO nanoparticles as antifungal and antibacterial agents using Colocasia esculenta leaf extract 微波辅助绿法合成氧化锌和掺银氧化锌纳米颗粒的研究
International Journal of Nanoparticles Pub Date : 2019-09-27 DOI: 10.1504/ijnp.2019.10023554
K. Kumar, N. Dinesh, S. K. Murari
{"title":"Microwave assisted green synthesis of ZnO and Ag doped ZnO nanoparticles as antifungal and antibacterial agents using Colocasia esculenta leaf extract","authors":"K. Kumar, N. Dinesh, S. K. Murari","doi":"10.1504/ijnp.2019.10023554","DOIUrl":"https://doi.org/10.1504/ijnp.2019.10023554","url":null,"abstract":"Considering the growing popularity of biosynthesis methods, the use of plant extracts for environment friendly synthesis of nanoparticles and the novel biomedical applications of zinc oxide (ZnO), the present study aims to synthesise ZnO and Ag doped ZnO nanoparticles through microwave assisted green synthesis method using the leaf extract of Colocasia esculenta. The nanoparticles synthesised were characterised for the assessment of their crystal structure, chemical phases, optical properties, distribution of particle size, stability, morphology, elemental composition, etc. by using a range of techniques, taking into account that the benefits of ZnO nanoparticles as piezoelectric conductors, transducers, antimicrobial agents, etc., predominantly depend on such morphological aspects. The efficiency of the synthesised nanoparticles as antimicrobial agents and comparison of the biocidal effects of doped and undoped nanoparticles were examined against the bacterial species, Bacillus subtilis and Escherichia coli, as well as the fungal species, Aspergillus oryzae and Saccharomyces cerevisiae, by using the cell culture technique.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42199824","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
Thermomagnetic convection in a layer of magnetic nanofluid saturating porous medium with magnetic field dependent viscosity 具有磁场依赖粘度的磁性纳米流体饱和多孔介质中的热磁对流
International Journal of Nanoparticles Pub Date : 2019-09-27 DOI: 10.1504/ijnp.2019.10024298
A. Mahajan, M. Sharma
{"title":"Thermomagnetic convection in a layer of magnetic nanofluid saturating porous medium with magnetic field dependent viscosity","authors":"A. Mahajan, M. Sharma","doi":"10.1504/ijnp.2019.10024298","DOIUrl":"https://doi.org/10.1504/ijnp.2019.10024298","url":null,"abstract":"In this paper, the effect of magnetic field dependent (MFD) viscosity on the onset of thermomagnetic convection is examined for a horizontal layer of magnetic nanofluid (or ferrofluid) saturated porous layer. A model that comprises the effect of Brownian diffusion, thermophoresis, magnetophoresis, and Darcy's law is considered. We employed the Chebyshev pseudospectral QZ-method to solve the developed mathematical model and the results are derived for water-based and ester-based magnetic nanofluids. The effects of significant parameters are analysed at the onset of convection in the gravity as well as in the microgravity environment. The influence of MFD viscosity, permeability parameter, the width of the fluid layer, Lewis number, Langevin parameter, particle concentration, and the concentration Rayleigh number at the onset of thermomagnetic convection are graphically illustrated.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42116388","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
Synthesis of cadmium sulphide nanoparticles through liquid membrane pathway 液膜法制备硫化镉纳米颗粒
International Journal of Nanoparticles Pub Date : 2019-09-27 DOI: 10.1504/ijnp.2019.10024299
S. Chakraborty, Prabirkumar Saha
{"title":"Synthesis of cadmium sulphide nanoparticles through liquid membrane pathway","authors":"S. Chakraborty, Prabirkumar Saha","doi":"10.1504/ijnp.2019.10024299","DOIUrl":"https://doi.org/10.1504/ijnp.2019.10024299","url":null,"abstract":"This paper introduces a proof of concept that liquid membrane technology that has always been used as a separation technique, can also be extended for the generation of value added products in its downstream side. It is possible to generate cadmium sulphide nanoparticles in the stripping phase of liquid membrane separation unit which have wide industrial application such as solar and photovoltaic cells. The process parameters such as concentration of cadmium salt and pH in feed phase, concentration of strippant, concentration of extractant/carrier agent, etc. were optimised leading to maximum production of CdS nanoparicles in the stripping phase. The characterisation of CdS nanoparticles were carried out using TEM, FESEM-EDX, FT-IR, XRD and SAED. The nanosize and nanocrystalline nature of the CdS particles were established.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48813268","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
Optimisation of carbon nanotubes for advanced diagnosis and biomedical application 优化碳纳米管的先进诊断和生物医学应用
International Journal of Nanoparticles Pub Date : 2019-09-27 DOI: 10.1504/ijnp.2019.10024301
Khalid Parwez, S. Budihal
{"title":"Optimisation of carbon nanotubes for advanced diagnosis and biomedical application","authors":"Khalid Parwez, S. Budihal","doi":"10.1504/ijnp.2019.10024301","DOIUrl":"https://doi.org/10.1504/ijnp.2019.10024301","url":null,"abstract":"Nanomaterials have a broad spectrum of applications in biomedical fields. The carbon nanotubes (CNTs) are among the most versatile and well-characterised members of this group of materials. This review aims to discuss how to utilise CNTs as a diagnostic tool. Functionalisation with antibodies has gained significance in recent years among the various way of functionalisation of CNTs. Antibodies make their surface sensitive to surroundings for immuno-sensing. Surface passivation with other proteins is required to inhibit the non-specific binding of biomolecules on the hydrophobic carbon nanotube surface for ultrasensitive detection of biological species. CNT-based immuno-sensors provide excellent results with a promising sensitivity and reproducibility and, in combination with novel devices [such as a microfluidic electrochemical biosensor, nanoelectromechanical systems (NEMS), paper-based analytical devices (PADs), field effect transistors (FET)]. This combination offers an attractive analytical approach for the fast, low-cost, and accessible detection of trace prognostic biomarkers, microbial pathogens, environmental pollutants, and toxins.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42999578","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
Nanoscale T-shaped AlGaN/GaN HEMT with improved DC and RF performance 具有改进的直流和射频性能的纳米T形AlGaN/GaN HEMT
International Journal of Nanoparticles Pub Date : 2019-03-29 DOI: 10.1504/IJNP.2019.10020326
M. Mohapatra, Tanmoy De, A. K. Panda
{"title":"Nanoscale T-shaped AlGaN/GaN HEMT with improved DC and RF performance","authors":"M. Mohapatra, Tanmoy De, A. K. Panda","doi":"10.1504/IJNP.2019.10020326","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10020326","url":null,"abstract":"AlGaN/GaN-based HEMT with different gate structure are designed i.e., 150 nm rectangular shaped HEMT and 90 nm T-shaped HEMT. It is shown that the DC parameters like drain current, transconductance are improved for T-shaped HEMT as compared to normal gate HEMT. The maximum cut-off frequency for normal gate HEMT is 24 GHz at drain voltage of 20 V and gate voltage of 2 V whereas it is 47 GHz for the T-shaped HEMT. Maximum frequency of oscillation for normal gate HEMT is 95 GHz and for T-shaped HEMT, it is 115 GHz. At the frequency of 5 GHz, the minimum noise figure of the normal gate HEMT is 0.13 dB and for T-shaped HEMT, it is 0.05 dB. Intrinsic time delay of normal gate HEMT is 22 ps whereas the intrinsic time delay for T-gate HEMT is 12 ps. These results prove that the T-shaped HEMT is more preferable for high frequency operations like radar communication, satellite communication, wireless communication, etc.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48390411","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
Analysis and circuit sizing performance of a differential amplifier using HPSO algorithm 基于HPSO算法的差分放大器的分析和电路尺寸设计性能
International Journal of Nanoparticles Pub Date : 2019-03-29 DOI: 10.1504/IJNP.2019.10020333
C. L. Singh, A. Gogoi, Ch. Anandini, K. L. Baishnab, Loukrakpam Merin
{"title":"Analysis and circuit sizing performance of a differential amplifier using HPSO algorithm","authors":"C. L. Singh, A. Gogoi, Ch. Anandini, K. L. Baishnab, Loukrakpam Merin","doi":"10.1504/IJNP.2019.10020333","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10020333","url":null,"abstract":"This paper presents an analysis of thermal noise of differential amplifier and automated sizing procedure with thermal noise incorporation, in addition to various design specifications, as constraints in the design process. Human behaviour-based particle swarm optimisation (HPSO), a swarm intelligence (SI)-based optimisation algorithm is used to perform the sizing task to obtain optimal value of design variables value subject to a satisfying set of constraints, with the main objective of designing a low-noise amplifier with minimum circuit area. The presented design procedure gives an option of considering both width and length of MOS transistor as design variables, which in turn can tune trade-off circuit performance parameters. The computational analysis is performed in MATLAB and CADENCE tool with UMC 180 nm parameters technology is used to validate the presented design procedure. Further, the performance of the purposed automated design methodology is compared with previous design methodology to check its efficiency in terms of speed, time and robustness.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43871591","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
Electrical parameter analysis of gate-extension on source of germanium tri-gate FinFET 锗三栅FinFET源极栅极扩展的电学参数分析
International Journal of Nanoparticles Pub Date : 2019-03-29 DOI: 10.1504/IJNP.2019.10020328
R. Das, S. Baishya
{"title":"Electrical parameter analysis of gate-extension on source of germanium tri-gate FinFET","authors":"R. Das, S. Baishya","doi":"10.1504/IJNP.2019.10020328","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10020328","url":null,"abstract":"This paper presents the impact of geometrical and the electrical parameters such as the concentration in channel region, variation of temperature, drain potential, gate work function, and electrostatic potential on the electrical characteristics of germanium (Ge) FinFET with two stacked gate dielectrics overlap on the source. The presented device exhibits better performance in terms of ION, IOFF, and ION/IOFF compared to the conventional FinFET structure.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49294689","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
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