Sensor Letters最新文献

{"title":"Electrochemical Sensor for Acetaminophen Based on a Poly(diphenylamine sulfonic acid) Modified Sensor","authors":"G. Erdoğdu","doi":"10.1166/sl.2020.4285","DOIUrl":"https://doi.org/10.1166/sl.2020.4285","url":null,"abstract":"A sensitive and simple modified sensor was prepared by electrodeposition of diphenylamine sulfonic acid (DPSA) to the glassy carbon electrode surface by cyclic voltammetry (CV) technique. The electrooxidation of Acetaminophen (AC) was accomplished by CV and differential pulse voltammetry\u0000 at poly(DPSA) modified sensor. As a result of the findings, the current values were enhanced and both substances were separated at the modified sensor compared to the bare electrode. There was linearly between the oxidation current and concentration of AC from 0.0 to 100 μM in phospate\u0000 buffer solution at pH 7.0. The limit of detection was 3.0 nM and the sensitivity was 0.4108 μA/μM. The determination of AC was successfully and satisfactorily carried out in real samples such as human blood serum and urine at the poly(DPSA) sensor. To the best knowledge\u0000 of this work, this is the first study that detect the AC in the presence of ascorbic acid at poly(DPSA) sensor in the literature.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"217 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76762610","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":"Implementation of an Ultra Low Power Process-Insensitive Two Stage Complementary Metal Oxide Semiconductor Operational Amplifier with Enhanced Direct Current Gain at 45 nm Technology Node","authors":"Pragati Gupta, S. Akashe","doi":"10.1166/sl.2020.4277","DOIUrl":"https://doi.org/10.1166/sl.2020.4277","url":null,"abstract":"This paper presents an ultra low power process-insensitive two stage CMOS OP-AMP employing bulk-biasing technique realised in a standard 45 nm CMOS technology. Bulk-Biasing technique has been employed to augment the DC gain of two stage CMOS OP-AMP without having any impact on its power\u0000 dissipation and output swing. In this work, high gain-bandwidth product (GBW) with appropriate phase margin is achieved through pseudo-cascode compensation approach which overcomes the drawbacks of Miller compensation technique also. Furthermore, the effect of width scaling on performance\u0000 metrics of proposed OP-AMP has been analysed. The designed OP-AMP exhibits enhanced DC gain of 94.2 dB, gain-bandwidth product (GBW) of 460 MHz and adequate phase margin of 80°; with fast settling response. Also, the proposed OP-AMP has power dissipation of 27 μW and leakage\u0000 current of 6.4 pA only. The design and optimisation of proposed OP-AMP is carried out at a power supply of 0.7 V under room temperature in Cadence Virtuoso tool.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81040703","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":"Sensitivity Enhancement of Surface Plasmon Resonance Sensor with Two Dimensional Materials Covered on Silver-Nickel Bimetallic Thin Solid Films","authors":"L. Castañeda","doi":"10.1166/sl.2020.4284","DOIUrl":"https://doi.org/10.1166/sl.2020.4284","url":null,"abstract":"In this paper a new sensing configuration with enhanced sensitivity utilizing 2D materials on the bimetallic layers of Magnetic Material Ni over Ag for Kretschmann configuration is proposed and analyzed numerically using Fresnel equation and transfer matrix method. Results show that\u0000 such a hybrid configuration with well optimized thickness of metallic layer and utilization of specific no. of 2D materials can increases the sensitivity as high as 298°/RIU is absorbed for the configuration consist 10 nm of Ni over 40 nm thickness of Ag added with a 2 layers of WSe2.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76462798","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":"Voltammetric Detection of Trace Elements in Various Biological Matrices","authors":"Hatice Gürünlüoğlu, G. Erdoğdu","doi":"10.1166/sl.2020.4273","DOIUrl":"https://doi.org/10.1166/sl.2020.4273","url":null,"abstract":"The purpose of this work is to analyse Cu, Zn, Pb and Cd simultaneously in biological samples such as serum, hair, tooth and bone using differential pulse stripping voltammetry (DPSV). Therefore, suitable sample preparation and experimental conditions are determined. Trace metal concentrations\u0000 of biological samples are measured and compared with the literature values. Cu, Zn and Pb are found in hair, tooth and bone samples while Cu and Zn metals is found in serum sample.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83222329","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":"New Sensitivity Analysis on Graphene Nanoribbon Interconnects to Determine Importance of Parameters","authors":"Z. Zamini, Soroor Rahimi Khamaneh, A. Jadidi, Babak Roshanipour","doi":"10.1166/SL.2020.4272","DOIUrl":"https://doi.org/10.1166/SL.2020.4272","url":null,"abstract":"In this paper sensitivity of a multilayer graphene nanoribbon (MGNR) interconnects parameters investigated. System sensitivity was studied on parameters like length and width in stable condition. The obtained results show with increasing width and length sensitivity will decrease and\u0000 increase respectively. Impulse response diagram results show with increasing 50% width sensitivity will be zero but with increasing 50% length amplitude will decrease and the time of setting will increase. On the other hand from step response of transfer function, both width and length increase\u0000 cause more stability for a system but the width parameter will be better choices for manipulating the dimension of MLGNR to reach the stable system.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"66 1 1","pages":"706-710"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90946985","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":"Synthesis, Characterization, and Biological Evaluation of Novel Pseudomonas aeruginosa RTAC 11 Synthesized Ag Nanoparticles","authors":"Lavina Temkar, R. Tripathi, A. Tiwari, N. Kaur, A. Kirthi, A. Chaskar","doi":"10.1166/SL.2020.4271","DOIUrl":"https://doi.org/10.1166/SL.2020.4271","url":null,"abstract":"Biological synthesis of silver nanoparticles (AgNPs) has been an area of research to avoid the harmful effects of the toxic chemicals used in its synthesis on our health and environment. In the present study, a novel strain of Pseudomonas aeruginosa-RTAC 11 isolated from soil\u0000 was used for the synthesis of AgNPs. Characterization of the synthesized nanoparticles like UV-vis spectroscopy confirmed the synthesis of AgNPs through a signature peak at 420 nm. Fourier Transform Infrared (FTIR) spectroscopic analysis revealed the capping of AgNPs by proteins through signature\u0000 functional groups. The nano-size of the particles were confirmed using scanning electron microscopy (SEM). The AgNPs showed good antibacterial activity against Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538, thus indicating an excellent antibacterial agent.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"37 1","pages":"694-699"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75782661","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":"Weakly Nonlinear Double-Diffusive Oscillatory Magneto-Convection Under Gravity Modulation","authors":"P. Kiran, S. Manjula","doi":"10.1166/SL.2020.4281","DOIUrl":"https://doi.org/10.1166/SL.2020.4281","url":null,"abstract":"An imposed time-periodic gravity field effect on double-diffusive magneto-convection for oscillatory mode has been investigated. The gravity field consisting of steady and periodic modes. A layer is confined with an electrically conducting fluid with Boussines q approximation and heated\u0000 from below cooled from above. While using the perturbation technique we study nonlinear double-diffusive convection just above the critical state of the onset convection. The growth rate of the disturbances is confined with a critical Rayleigh number to investigate oscillatory convection.\u0000 Analysis of finite- amplitude convection has been derived through the complex Ginzburg-Landau equation (CGLE). The convective heat and mass transfer obtained through CGLE at third-order under solvability conditions. This convective amplitude is required to estimate heat and mass transfer in\u0000 terms of the Nusselt and Sherwood numbers. It is found that increasing the frequency of modulation causes diminishing heat and mass transfer. The effect of Prandtl number Pr, magnetic Prandtl number Pm, and amplitude δ enhances heat/mass transfer. It is found that an oscillatory mode\u0000 of convection enhances the heat and mass transfer than the stationary mode. Further, streamlines, isotherms, and isohalines have their usual nature on double-diffusive magnetoconvection.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"45 1","pages":"725-738"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87406589","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":"Design and Performance Analysis of Application Specific Integrated Circuit for Internet of Things Applications","authors":"Vivek Pogra, Amandeep Singh, S. Vishvakarma, B. Raj","doi":"10.1166/sl.2020.4239","DOIUrl":"https://doi.org/10.1166/sl.2020.4239","url":null,"abstract":"This paper proposes a novel design of application specific integrated circuit (ASIC) which is capable of connecting sensor network and other electronic systems to the internet. The transfer of data between different networks and electronic systems is controlled by internet of things\u0000 (IoT) platform with the help of instruction sent to ASIC. ASIC will act as serial peripheral interface (SPI) master to all connected networks and data will be transferred serially between them. The different ASIC modules are SPI module, control module, memory module and data/instruction decoder\u0000 with additional modules built-in self-test (BIST) and direct memory access (DMA). The proposed ASIC will consume less power as compared to conventional microcontroller/microprocessor due to SPI feature along with DMA on ASIC for IoT applications. It is described in very high speed integrated\u0000 circuit hardware description language (VHDL) at register transfer level (RTL) and simulation is done on the Vivado 2016.2.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84959083","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":"Monte Carlo Modelling of Magnetic and Thermodynamic Features of Rb3CoCl5 and Dy3Al5O12 Magnetic Systems","authors":"A. Hendi, A. Bamuqaddam, S. Aldaghfag, F. Alkallas, M. Almoneef, M. Alanazi, A. Laref, N. Alsaif, M. Awad, A. Altowyan, K. Ortashi, J. Alzahrani","doi":"10.1166/SL.2020.4283","DOIUrl":"https://doi.org/10.1166/SL.2020.4283","url":null,"abstract":"In our simulations, we considered two typical magnetic materials, while the first one includes the 3d-transition metal, such as cobalt which is responsible of the presence of magnetism in pyrochlore structure Rb3CoCl5. The second magnetic material was chosen\u0000 to have 4f-rare earth metal, namely dysprosium that can induce magnetism in garnet material Dy3Al5O12. A general agreement was found between our results and the previous works. In our calculations, we employed the classical Ising model for the above\u0000 mentioned realistic materials. We specifically studied the magnetic properties over a range of temperature including the critical temperature and above it. To understand the magnetic phase transition, the effect of magnetic field was involved in the classical Ising model.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"77 1","pages":"719-724"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73616798","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":"Improved Performance of Platinum Diselenide Based Surface Plasmon Resonance Biosensor Using Silicon","authors":"R. Tiwari, Sachin Singh, R. Yadav, P. Lohia, D. K. Dwivedi","doi":"10.1166/SL.2020.4279","DOIUrl":"https://doi.org/10.1166/SL.2020.4279","url":null,"abstract":"After the discovery of graphene in 2004, two-dimensional materials have attracted attention at large scale because of their peculiar structure and extraordinary properties. As they have large potential in future nano electronics, two-dimensional transition metal dichalcogenides has\u0000 become most focus topic of study. Transition metal dichalcogenides with tunable finite band gap and significant transitional behavior are much suitable for the construction of electronic and optoelectronic devices of high-performance. However, platinum diselenide is group-10 transition metal\u0000 dichalcogenides which occur naturally in one phase transition, which has been theoretically predicted as an excellent material. The proposed structure of surface plasmon resonance (SPR) -based biosensor consists of a silicon and two-dimensional nanomaterial platinum diselenide. The performance\u0000 parameters of proposed biosensor (surface plasmon resonance-based) such as detection accuracy, figure of merit, sensitivity, full width at half maximum have been investigated. The sensitivity, detection accuracy, full width half maximum and figure of merit of proposed surface plasmon resonance\u0000 biosensor having silver (50 nm), silicon (2 nm) and one layer of platinum diselenide with 2 nm thickness at 633 nm wavelength is 2200RIU–1 , 0.20 deg–1, 4.980 and 44.22 RIU–1 respectively. Silicon sheet is used in the middle of\u0000 the Ag and platinum diselenide to prevent the oxidation of silver and enhance the sensitivity of platinum diselenide based surface plasmon resonance biosensor. The sensitivity of conventional surface plasmon resonance biosensor and the proposed surface plasmon resonance biosensor without silicon\u0000 layer is 1700RIU–1 and 2000RIU–1 respectively. Surface plasmon resonance biosensor of device structure CaF2/Ag/Si/PtSe2 has higher sensitivity in comparison to device structures CaF2/Ag (conventional)\u0000 and CaF2/Ag/PtSe2 (without Silicon Layer) by 29.41% and 10% respectively. Although the highest sensitivity obtained is 2620RIU–1 for 60 nm silver with 3 nm silicon layer except the platinum diselenide layer.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"1 1","pages":"711-718"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83197554","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}