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International Journal of Nanoparticles最新文献

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Reduced ordered binary decision diagram-based combinational circuit synthesis for optimising area, power and temperature 基于降阶二进制决策图的组合电路综合优化面积、功率和温度
International Journal of Nanoparticles Pub Date : 2019-03-29 DOI: 10.1504/IJNP.2019.10020325
Apangshu Das, Akash Debnath, S. Pradhan
{"title":"Reduced ordered binary decision diagram-based combinational circuit synthesis for optimising area, power and temperature","authors":"Apangshu Das, Akash Debnath, S. Pradhan","doi":"10.1504/IJNP.2019.10020325","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10020325","url":null,"abstract":"In this paper, an attempt is made to reduce the rise in circuit temperature by optimising power-density during logic synthesis level. Reduced ordered binary decision diagram (ROBDD) being canonical in nature makes a suitable choice of logic realisation in this work. ROBDD is used here not only to reduce area (node) but also the possibility of reducing power and temperature (power-density) is explored. In this work, a genetic algorithm based approach is presented to determine a suitable variable ordering during the formation of the ROBDD for its thermal-aware realisation considering other parameters like area and power without performance degradation. The proposed approach shows more than 33% savings in area and power, and 5.61% savings in power-density with respect to initial ROBDD representation of LGSynth93 benchmark circuits. Actual on-chip area, power dissipation and the absolute value of temperature are calculated using CADENCE and HotSpot tool to validate the power-density based results.","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":"41542160","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
Electro-thermal assessment of heterojunction tunnel-FET for low-power digital circuits 用于低功耗数字电路的异质结隧道场效应管的电热评估
International Journal of Nanoparticles Pub Date : 2019-03-29 DOI: 10.1504/IJNP.2019.10020331
C. K. Maiti, Sanghamitra Das, S. Dey, Tara Prasanna Dash
{"title":"Electro-thermal assessment of heterojunction tunnel-FET for low-power digital circuits","authors":"C. K. Maiti, Sanghamitra Das, S. Dey, Tara Prasanna Dash","doi":"10.1504/IJNP.2019.10020331","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10020331","url":null,"abstract":"To overcome the fundamental limitations of conventional MOSFETs, tunnel field effect transistors (TFETs) with strained-SiGe channel (via heterogeneous integration) may be used and is demonstrated using TCAD simulations. We mainly focus on the design and implementation of silicon-germanium (SiGe)-based tunnel field effect transistor, aiming to reduce the device operation voltage down to below 0.5 V. Physics-based electro-thermal simulations are performed for evaluating the self-heating (temperature rise) in the devices. We present the results of the electro-thermal analysis supported by effective 2D and 3D device simulations. Performance improvement in drain current as high as 200% has been achieved.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":"143 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41315554","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 fully depleted SiGe channel with raised source/drain buried oxide nMOSFET 提升源/漏埋氧化nMOSFET的全耗尽SiGe沟道优化
International Journal of Nanoparticles Pub Date : 2019-03-29 DOI: 10.1504/IJNP.2019.10020324
K. Vanlalawmpuia, B. Bhowmick, Madhuchhanda Choudhury
{"title":"Optimisation of fully depleted SiGe channel with raised source/drain buried oxide nMOSFET","authors":"K. Vanlalawmpuia, B. Bhowmick, Madhuchhanda Choudhury","doi":"10.1504/IJNP.2019.10020324","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10020324","url":null,"abstract":"A fully depleted silicon-germanium (SiGe) n-channel heterojunction MOSFET with raised buried oxide in the source/drain is reported under the consideration that channel is made of SiGe and source/drain regions is made of silicon (Si). Due to the raised buried oxide source/drain region, it provides better current due to the improvement of mobility in the channel region and also reduce the surface scattering effects. Bandgap engineering has been done to improve the electrical behaviour of the device. Simulation work for different parameters on the device has been carried out and presented in the paper. The electrical characteristics of the proposed device are optimised by varying the device dimensions. Effect of mole fraction on threshold voltage (VTH), Subthreshold swing (SS), ION and IOFF current ratio is analysed. It is observed that due to presence of SiGe channel and the raised source/drain, the proposed device shows enhancement in electrical characteristics. A CMOS inverter through proposed device has been implemented and the effect of mole fraction on its characteristic is reported. Average delay increases as mole fraction increases.","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":"42902943","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
Impact of structural parameters on DC performance of recessed channel SOI-MOSFET 结构参数对嵌入式沟道SOI-MOSFET直流性能的影响
International Journal of Nanoparticles Pub Date : 2019-03-29 DOI: 10.1504/IJNP.2019.10020281
Sikha Mishra, U. Bhanja, G. P. Mishra
{"title":"Impact of structural parameters on DC performance of recessed channel SOI-MOSFET","authors":"Sikha Mishra, U. Bhanja, G. P. Mishra","doi":"10.1504/IJNP.2019.10020281","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10020281","url":null,"abstract":"With the concept of groove gate and implementing the idea of silicon on insulator (SOI), a new analytical model is developed for the rectangular recessed channel silicon on insulator (RRC-SOI) metal oxide semiconductor field effect transistor (MOSFET). This analytical model is formulated using 2D Poisson's equation and develops a compact equation for threshold voltage using minimum surface potential. This paper analyses the effect of negative junction depth (NJD) on device parameters, such as minimum surface potential, threshold voltage, sub-threshold slope (SS), and drain induced barrier lowering (DIBL). The impact of oxide thickness variation on the above parameters has also been evaluated. Further, the linearity performance in terms of figure of merits (FOM) and device parameters like drain current and trans-conductance of the proposed model is compared with the simulated results of rectangular recessed channel (RRC) MOSFET. The validity of the proposed model has been verified with simulation results performed on Sentaurus TCAD device simulator.","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":"42011560","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: 5
Synthesis, characterisation and investigation of enhanced photocatalytic activity of Sm+3, Ni+2 co-doped TiO2 nanoparticles on the degradation of azo dyes in visible region Sm+3，Ni+2共掺杂TiO2纳米颗粒的合成、表征及对可见光区域偶氮染料降解的增强光催化活性研究
International Journal of Nanoparticles Pub Date : 2019-02-25 DOI: 10.1504/IJNP.2019.10019138
Amna Bashir, Fatima Bashir, Zahid Mehmood, Muhammad Sultan Satti, Z. Akhter
{"title":"Synthesis, characterisation and investigation of enhanced photocatalytic activity of Sm+3, Ni+2 co-doped TiO2 nanoparticles on the degradation of azo dyes in visible region","authors":"Amna Bashir, Fatima Bashir, Zahid Mehmood, Muhammad Sultan Satti, Z. Akhter","doi":"10.1504/IJNP.2019.10019138","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10019138","url":null,"abstract":"Pure and samarium-nickel co-doped TiO2 nanoparticles with different Sm contents were synthesised by sol-gel method. The synthesised nanoparticles were characterised using different techniques. It is revealed from experimental results that the doping of TiO2 with samarium and nickel not only increase the surface area of mesoporous TiO2 but also decrease the particle size (17.0 nm to 8.01 nm by increasing Sm+3 contents). Diffuse-reflectance spectroscopic studies showed the slight red shift in band-gap transitions and appearance of the new absorption band in the visible region (719 nm) caused by Ni+2 and Sm+3 doping. The photocatalytic degradation of azo dyes (Reactive Red-195 and Reactive Black-08) was carried out in visible region using modified TiO2 at different pH values. Results revealed that 99% of RR-195 and 75.33% RB-08 were degraded after 10-20 minutes of irradiation. Maximum degradation was achieved in case of nanoparticles co-doped with 5% Ni and 3% Sm.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45713266","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
The role of pH and effect of calcination temperature on polymorphs and properties of iron oxide nanoparticles pH和煅烧温度对氧化铁纳米粒子多晶型和性能的影响
International Journal of Nanoparticles Pub Date : 2019-02-25 DOI: 10.1504/IJNP.2019.10019136
J. Justus, S. Roy, A. Moses Ezhil Raj, M. Bououdina
{"title":"The role of pH and effect of calcination temperature on polymorphs and properties of iron oxide nanoparticles","authors":"J. Justus, S. Roy, A. Moses Ezhil Raj, M. Bououdina","doi":"10.1504/IJNP.2019.10019136","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10019136","url":null,"abstract":"Iron oxide nanoparticles were successfully synthesised by a facile solution approach employing iron (III) chloride (FeCl3) as starting precursor and sodium hydroxide (NaOH) as reducing agent, followed by calcination in air at different temperatures viz. 400, 600 and 800°C for three hours. The range of calcination temperature has been chosen from thermogravimetry analysis. X-ray diffraction patterns clearly confirmed the structural transformation of cubic Fe3O4 to hexagonal α-Fe2O3 upon calcination. FTIR vibrational bands corresponding to Fe-O bondings in the tetrahedral and octahedral sites and their shift upon calcination confirmed the structural transitions. Scanning electron microscopy observations revealed agglomers meanwhile energy dispersive spectroscopy analysis confirm the elemental composition. Optical band gaps estimated from Tauc plots was found to vary with structural transformation. Electrical conductivity measurements with temperature were explained on the basis of fluctuation of ions in the B sites of Fe3O4 and deviation from stoichiometry in the case of α-Fe2O3.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41796469","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
Methotrexate sodium loaded Tween 80 stabilised gold nanoparticles: synthesis and characterisation 甲氨蝶呤钠负载的t80稳定金纳米颗粒:合成和表征
International Journal of Nanoparticles Pub Date : 2019-02-25 DOI: 10.1504/IJNP.2019.10019133
Ankita Patel, G. K. Jani, K. Ranch, A. Koli, Naresh B. Dharmani
{"title":"Methotrexate sodium loaded Tween 80 stabilised gold nanoparticles: synthesis and characterisation","authors":"Ankita Patel, G. K. Jani, K. Ranch, A. Koli, Naresh B. Dharmani","doi":"10.1504/IJNP.2019.10019133","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10019133","url":null,"abstract":"Cancer is a disease characterised by uncontrolled multiplication and spread of abnormal forms of the body's own cells. Methotrexate sodium is an antineoplastic agent of the anti-metabolite class of chemotherapy drugs, which inhibits dihydrofolate reductase and blocking the conversion of dihydrofolic acid to tetrahydrofolic acid. Metal nanoparticles such as gold nanoparticles are having a smaller size, more stable and relatively narrow size distribution which provide opportunities for effective active or passive targeted delivery. Thus, the gold nanoparticles were synthesised using a chemical reduction method, involving the reduction of chloroauric acid by trisodium citrate, stabilised by Tween 80 and Methotrexate sodium was loaded on to it. Physical observations and FTIR analysis showed that drug and excipients pass the drug-excipient compatibility study. The present work reports a significant and a simple, process capable of synthesising size-controlled Tween 80 stabilised gold nanoparticles rapidly under ambient conditions.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45313911","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
Application of aqueous phase CdSe quantum dots for formaldehyde sensing 水相CdSe量子点在甲醛传感中的应用
International Journal of Nanoparticles Pub Date : 2019-02-25 DOI: 10.1504/IJNP.2019.10019126
N. Deepika, R. Dhar, Suman Singh
{"title":"Application of aqueous phase CdSe quantum dots for formaldehyde sensing","authors":"N. Deepika, R. Dhar, Suman Singh","doi":"10.1504/IJNP.2019.10019126","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10019126","url":null,"abstract":"Thioglycolic acid capped cadmium selenide (CdSe) quantum dots have been synthesised in aqueous phase and their optical properties have been studied using UV-visible absorption and fluorescence spectroscopy. Quantum dots have been characterised using TEM and XRD. The potential application of CdSe quantum dots are further studied using formaldehyde as a model compound. The sensing is based on fluorescence quenching of quantum dots in the presence of formaldehyde, and this work showed linearity in the range from 0.15 to 1.05 ppm, with a detection limit of 0.06 ppm.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44727147","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
Calculating current density and quantum efficiency of p-n junction solar cell with quasi-Fermi level approximation 用准费米能级近似计算pn结太阳能电池的电流密度和量子效率
International Journal of Nanoparticles Pub Date : 2019-02-25 DOI: 10.1504/IJNP.2019.10019134
A. Deyasi, A. Sarkar
{"title":"Calculating current density and quantum efficiency of p-n junction solar cell with quasi-Fermi level approximation","authors":"A. Deyasi, A. Sarkar","doi":"10.1504/IJNP.2019.10019134","DOIUrl":"https://doi.org/10.1504/IJNP.2019.10019134","url":null,"abstract":"Current density and quantum efficiency of p-n junction GaAs solar cell is analytically investigated incorporating the effect of excess carriers due to photon incidence. Carrier transport equations for both types of carriers are solved involving both the conduction mechanisms along with generation rate. Change of dark current is reported in presence of varying operating conditions, and modulation of quantum efficiency is obtained by varying structural parameters. Results are useful for accurate estimation of figure of merit, which will play key role in photovoltaic applications.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45707650","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
Thermal convection in a rectangular box saturated by nanofluid with convective boundary condition 具有对流边界条件的纳米流体饱和矩形箱中的热对流
International Journal of Nanoparticles Pub Date : 2018-11-30 DOI: 10.1504/IJNP.2018.10017714
S. Saini, Y. D. Sharma
{"title":"Thermal convection in a rectangular box saturated by nanofluid with convective boundary condition","authors":"S. Saini, Y. D. Sharma","doi":"10.1504/IJNP.2018.10017714","DOIUrl":"https://doi.org/10.1504/IJNP.2018.10017714","url":null,"abstract":"The combined effect of Brownian diffusion and thermophoretic (collision between molecules of base fluid and nanoparticles) on the onset of convection in a rectangular box has been investigated in the present paper. Convective boundary condition and modified mass flux condition are considered. Darcy model is used for porous media. The linear stability of nanofluid is analysed by calculating the critical Rayleigh number using normal mode technique and resulting equations are solved by the Galerkin residual method. The critical Rayleigh number is determined as a function of the nanofluid parameters, Biot number, and aspect ratios of the rectangular box. It is observed that modified diffusivity ratio, nanoparticle Rayleigh number, and Lewis number, destabilise the system, while Biot number and porosity stabilise the system. It is also found that effect of nanoparticles on convection is independent to the aspect ratio of a rectangular box. The stabilising/destabilising effects of various governing parameters on the convection have also been presented graphically.","PeriodicalId":14016,"journal":{"name":"International Journal of Nanoparticles","volume":"10 1","pages":"273"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45752377","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
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