A compact microwave breast imaging (MBI) Omni-directional antenna applications has been proposed. As a primary health observation, the built antenna is inexpensive and has no health risk. Two antenna designs have been used together with the viable signal processing technology to identify the tumor available in breast phantom. At the 3.3 GHz frequency band, the electric length of the antenna is 0.22 λ × 0.176 λ × 0.0088 λ antenna has been offering the bandwidth is 40.6%.
{"title":"Circular Shape Coplanar Waveguide Antenna Sensors for Cancer Detection Application","authors":"Praveen Kumar Rao, A. Patel, Rajan Mishra","doi":"10.1166/sl.2020.4295","DOIUrl":"https://doi.org/10.1166/sl.2020.4295","url":null,"abstract":"A compact microwave breast imaging (MBI) Omni-directional antenna applications has been proposed. As a primary health observation, the built antenna is inexpensive and has no health risk. Two antenna designs have been used together with the viable signal processing technology to identify\u0000 the tumor available in breast phantom. At the 3.3 GHz frequency band, the electric length of the antenna is 0.22 λ × 0.176 λ × 0.0088 λ antenna has been offering the bandwidth is 40.6%.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87592052","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}
K. Jeon, R. Nirmala, S. Hong, Yong-II Chung, R. Navamathavan, H. Kim
This manuscript is dealt with the synthesis of short carbon fibers reinforced polycarbonate polymer composite by using injection modeling technique. Four different composite materials were obtained by varying the carbon fibers weight percentage of 10, 20, 30 and 40%. The synthesized carbon fibers/polycarbonate composites were characterized for their morphological, mechanical and thermal properties by means of scanning electron microscopy (SEM), universal testing machine (UTM) and IZOD strength test. The resultant carbon fibers/polycarbonate composites exhibited excellent interfacial adhesion between carbon fibers and polycarbonate resin. The tensile properties were observed to be monotonically increases with increasing carbon fiber content in the composite resin. The tensile strength of carbon fiber/polycarbonate composites with the carbon fiber content 40% were increased about 8 times than that of the pristine polycarbonate matrix. The carbon fibers/polycarbonate composites with 40 wt.% of short carbon fibers exhibited a high tensile strength and thermal conductivity. The incorporation of carbon fiber in to polycarbonate resin resulted in a significant enhancement in the mechanical and the thermal behavior. These studies suggested that the short carbon fiber incorporated polycarbonate composite matrix is a good candidate material for many technological applications.
{"title":"A Study on Mechanical Properties of Short Carbon Fiber Reinforced Polycarbonate via an Injection Molding Process","authors":"K. Jeon, R. Nirmala, S. Hong, Yong-II Chung, R. Navamathavan, H. Kim","doi":"10.1166/sl.2020.4290","DOIUrl":"https://doi.org/10.1166/sl.2020.4290","url":null,"abstract":"This manuscript is dealt with the synthesis of short carbon fibers reinforced polycarbonate polymer composite by using injection modeling technique. Four different composite materials were obtained by varying the carbon fibers weight percentage of 10, 20, 30 and 40%. The synthesized\u0000 carbon fibers/polycarbonate composites were characterized for their morphological, mechanical and thermal properties by means of scanning electron microscopy (SEM), universal testing machine (UTM) and IZOD strength test. The resultant carbon fibers/polycarbonate composites exhibited excellent\u0000 interfacial adhesion between carbon fibers and polycarbonate resin. The tensile properties were observed to be monotonically increases with increasing carbon fiber content in the composite resin. The tensile strength of carbon fiber/polycarbonate composites with the carbon fiber content 40%\u0000 were increased about 8 times than that of the pristine polycarbonate matrix. The carbon fibers/polycarbonate composites with 40 wt.% of short carbon fibers exhibited a high tensile strength and thermal conductivity. The incorporation of carbon fiber in to polycarbonate resin resulted in a\u0000 significant enhancement in the mechanical and the thermal behavior. These studies suggested that the short carbon fiber incorporated polycarbonate composite matrix is a good candidate material for many technological applications.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"107 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80502605","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}
In this work, we report an overoxidized polypyrrole (oPPy)/single-wall carbon nanotubes (SWCNTs) matrix, electrochemically coated onto a glassy carbon electrode (GCE). This matrix was characterized by AFM, FTIR, and cyclic voltammetry. It is shown that the developed permslective matrix allows the simultaneous quantification of multiple metal ions, including zinc, cadmium, and lead, using square wave anodic stripping voltammetry. The sensitivities of the oPPy/SWCNTs/GCE for Zn2+, Cd2+, and Pb2+ are respectively, 8.89, 41.3, and 45.4 μA mol L~1. The detection limits of Cd2+ and Pb2+ were found to be respectively equal to 37 μg/L and 69 μg/L In addition, the developed oPPy/SWCNTs based sensor has been successfully used for the detection of lead and cadmium in wastewater samples.
{"title":"Overoxidized Polypyrrole/Sodium Dodecyl Sulfate/Single Wall Carbon Nanotubes Matrix for the Simultaneous Electrochemical Determination of Heavy Metal Ions by Adsorptive Stripping Voltammetry","authors":"Sarra Slimi, H. Barhoumi, N. Jaffrezic‐Renault","doi":"10.1166/sl.2020.4292","DOIUrl":"https://doi.org/10.1166/sl.2020.4292","url":null,"abstract":"In this work, we report an overoxidized polypyrrole (oPPy)/single-wall carbon nanotubes (SWCNTs) matrix, electrochemically coated onto a glassy carbon electrode (GCE). This matrix was characterized by AFM, FTIR, and cyclic voltammetry. It is shown that the developed permslective matrix\u0000 allows the simultaneous quantification of multiple metal ions, including zinc, cadmium, and lead, using square wave anodic stripping voltammetry. The sensitivities of the oPPy/SWCNTs/GCE for Zn2+, Cd2+, and Pb2+ are respectively, 8.89, 41.3, and 45.4 μA\u0000 mol L~1. The detection limits of Cd2+ and Pb2+ were found to be respectively equal to 37 μg/L and 69 μg/L In addition, the developed oPPy/SWCNTs based sensor has been successfully used for the detection of lead and cadmium in wastewater\u0000 samples.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82765641","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}
Mahsa JaFari-Pouyani, Samineh Kaki, A. Babakhanian
This study focuses on the compatibility of square wave voltammetry technique with new modified graphite pencil electrode to quantify Oxytocin. Ni-Nano particles and 1,5-diphenylcarbazide modifiers were quickly electro-deposited by cyclic voltammetry sweeping technique on the bare surface of a graphite pencil electrode. The electrochemical and morphological assessments were accomplished with cyclic voltammetry, square wave voltammetry and scanning electron microscopy techniques. The proposed electrochemical sensor revealed a good electro catalytic response to Oxytocin concerning the parameters α = 0.42, log Ks =3.44 and Γ = 8.72×10−10 in the optimized pH of 4 and the working potential of about 0.35 V. The new sensor also exhibited a linear response to Oxytocin over the concentration range of 125 to 350 nmolL−1 with the limit of detection of 41.53 nmolL−1. Moreover, the applicability of the proposed sensor was successfully examined and it became usable to determine Oxytocin accurately and precisely in real samples such as human blood serum sample without any serious side interference.
{"title":"New PGE Modified Electrode Comprising Ni NPs/1,5-Diphenylcarbazide Film Capable for Analyzing Oxytocin","authors":"Mahsa JaFari-Pouyani, Samineh Kaki, A. Babakhanian","doi":"10.1166/sl.2020.4287","DOIUrl":"https://doi.org/10.1166/sl.2020.4287","url":null,"abstract":"This study focuses on the compatibility of square wave voltammetry technique with new modified graphite pencil electrode to quantify Oxytocin. Ni-Nano particles and 1,5-diphenylcarbazide modifiers were quickly electro-deposited by cyclic voltammetry sweeping technique on the bare surface\u0000 of a graphite pencil electrode. The electrochemical and morphological assessments were accomplished with cyclic voltammetry, square wave voltammetry and scanning electron microscopy techniques. The proposed electrochemical sensor revealed a good electro catalytic response to Oxytocin concerning\u0000 the parameters α = 0.42, log Ks =3.44 and Γ = 8.72×10−10 in the optimized pH of 4 and the working potential of about 0.35 V. The new sensor also exhibited a linear response to Oxytocin over the concentration range of 125 to 350 nmolL−1\u0000 with the limit of detection of 41.53 nmolL−1. Moreover, the applicability of the proposed sensor was successfully examined and it became usable to determine Oxytocin accurately and precisely in real samples such as human blood serum sample without any serious side interference.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84652682","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}
Nahid Taghiee Karaji, Samineh Kaki, A. Babakhanian
In the current study, the main focus is designing a new enzyme-less modified electrode based on the electro deposition of Poly Brucine/Polyvinylpyrrolidone on pencil graphite electrode and its utilizing for cholesterol quantification. The electrochemical responses of the proposed sensor were recorded using cyclic and square wave voltammetry techniques for detection of cholesterol at optimized pH =2. The morphology investigations of the modified surfaces were performed by scanning electron microscopy and the obtained images verified Nano formations in the structure of the sensor. The proposed electrochemical sensor revealed a good electro catalytic response to cholesterol concerning the parameters α = 0.83, log Ks = 3.11 and Γ = 8.55 × 10T8. Besides, the calibration plot was acquired with a linear portion in the concentration ranges of 25 to 95 nmol L−1 (nM) and the detection limit (LOD = 8.28 nM). The designed sensor demonstrated the reproducible and repeat-able outputs, the high sensitivity and stability in analyzing cholesterol as well as recoveries in blood serum samples without any side serious interferences.
{"title":"Design an Enzyme-Less Sensitive Sensor for Cholesterol Detection Based on Poly Brucine/Polyvinylpyrrolidone Film","authors":"Nahid Taghiee Karaji, Samineh Kaki, A. Babakhanian","doi":"10.1166/sl.2020.4294","DOIUrl":"https://doi.org/10.1166/sl.2020.4294","url":null,"abstract":"In the current study, the main focus is designing a new enzyme-less modified electrode based on the electro deposition of Poly Brucine/Polyvinylpyrrolidone on pencil graphite electrode and its utilizing for cholesterol quantification. The electrochemical responses of the proposed sensor\u0000 were recorded using cyclic and square wave voltammetry techniques for detection of cholesterol at optimized pH =2. The morphology investigations of the modified surfaces were performed by scanning electron microscopy and the obtained images verified Nano formations in the structure of the\u0000 sensor. The proposed electrochemical sensor revealed a good electro catalytic response to cholesterol concerning the parameters α = 0.83, log Ks = 3.11 and Γ = 8.55 × 10T8. Besides, the calibration plot was acquired with a linear portion in the concentration\u0000 ranges of 25 to 95 nmol L−1 (nM) and the detection limit (LOD = 8.28 nM). The designed sensor demonstrated the reproducible and repeat-able outputs, the high sensitivity and stability in analyzing cholesterol as well as recoveries in blood serum samples without any side serious\u0000 interferences.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75134431","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}
D. C. M. Glory, K. Sambathkumar, R. Madivanane, R. Gayathri, C. L. E. Raj, S. Nithiyanantham, G. Ravichandran
The N-(4-Cholorobenzoyl)Fenamic acid crystal have been grown, the structural and the lattice parameters are found through XRD analysis. The chemical bonding and their nature analysis was performed from the FTIR and FT-Raman spectra’s. The molecular structure optimized through DFT (Density Functional Theory) computations and correlated through experimental one. From the optimized geometry from the computations provide to the structural, frequencies and other parameters are match with experiments. From hyper-conjugative interactions, charge delocalization used to study the stabile nature of molecules through NBO analysis. The thermodynamic properties are linearly deepened with temperature. And susceptibility of the crystal can be performed is found to decrease at different temperatures is calculated. The spectral analysis agreed well with experiments.
{"title":"Study on N-(4-Chlorobenzoyl) Fenamic Acid Crystal-Density Functional Theory Approach","authors":"D. C. M. Glory, K. Sambathkumar, R. Madivanane, R. Gayathri, C. L. E. Raj, S. Nithiyanantham, G. Ravichandran","doi":"10.1166/sl.2020.4291","DOIUrl":"https://doi.org/10.1166/sl.2020.4291","url":null,"abstract":"The N-(4-Cholorobenzoyl)Fenamic acid crystal have been grown, the structural and the lattice parameters are found through XRD analysis. The chemical bonding and their nature analysis was performed from the FTIR and FT-Raman spectra’s. The molecular structure optimized through\u0000 DFT (Density Functional Theory) computations and correlated through experimental one. From the optimized geometry from the computations provide to the structural, frequencies and other parameters are match with experiments. From hyper-conjugative interactions, charge delocalization used to\u0000 study the stabile nature of molecules through NBO analysis. The thermodynamic properties are linearly deepened with temperature. And susceptibility of the crystal can be performed is found to decrease at different temperatures is calculated. The spectral analysis agreed well with experiments.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88285664","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}
A micrometer size, simple, and low-cost sensor for continuous monitoring of human blood during malarial infection at its various stages is proposed in this work. The sensor comprises a light source, silica fiber directional coupler, and an optoelectronic photodetector. The sensor is simulated for fiber diameters from 1–1.8 #x03BC;m and optimization is done. The sensor produces a photocurrent of a few mA, which gives the level of infection. It can detect a change in refractive index, of the order of 10−5, and needs a small sensing length of a few μm. It can be potentially built as an integrated embedded device.
{"title":"Monitoring of Various Stages of Malaria Using Miniature Fibre Coupler Sensor Device","authors":"S. Kulkarni, S. Patrikar","doi":"10.1166/sl.2020.4289","DOIUrl":"https://doi.org/10.1166/sl.2020.4289","url":null,"abstract":"A micrometer size, simple, and low-cost sensor for continuous monitoring of human blood during malarial infection at its various stages is proposed in this work. The sensor comprises a light source, silica fiber directional coupler, and an optoelectronic photodetector. The sensor is\u0000 simulated for fiber diameters from 1–1.8 #x03BC;m and optimization is done. The sensor produces a photocurrent of a few mA, which gives the level of infection. It can detect a change in refractive index, of the order of 10−5, and needs a small sensing length of\u0000 a few μm. It can be potentially built as an integrated embedded device.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"2015 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89530732","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}
Chih-Chia Wang, Chi-Hung Liu, Hsuan-Hua Hsieh, Chih-wei Tang, Chen-Bin Wang
In this study, a nanostructured zinc oxide/reduced graphene oxide (ZnO/rGO) composite was deposited on a quartz crystal microbalance (QCM) as a toluene gas sensor at room temperature. A series of ZnO, rGO and ZnO/rGO sensing materials was fabricated and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and Raman spectroscopy. There was significant efficiency of the ZnO/rGO composite on the sensing performance for toluene. For specific gas fluxes, the nanostructured ZnO/rGO offered sufficient paths and region for vapor diffusion and adsorption. The sensing test results illustrated that the nanostructured ZnO/rGO composite showed significant enhancement in the frequency shifts (△f) for toluene comparing to pure ZnO and rGO. Also, the ZnO/rGO-coated QCM sensor displayed a fast response (both the response and recovery times < 30 s) and reproducibility for sensing toluene gas at room temperature. We believe that the novel insights on ambient temperature gas sensing on nanostructured ZnO/rGO composite could provide a new strategy for preparing a highly efficient sensing materials.
{"title":"Zinc Oxide/Reduced Graphene Oxide Nanocomposites for Rapid Detection of Toluene Gas at Room Temperature","authors":"Chih-Chia Wang, Chi-Hung Liu, Hsuan-Hua Hsieh, Chih-wei Tang, Chen-Bin Wang","doi":"10.1166/sl.2020.4288","DOIUrl":"https://doi.org/10.1166/sl.2020.4288","url":null,"abstract":"In this study, a nanostructured zinc oxide/reduced graphene oxide (ZnO/rGO) composite was deposited on a quartz crystal microbalance (QCM) as a toluene gas sensor at room temperature. A series of ZnO, rGO and ZnO/rGO sensing materials was fabricated and characterized by X-ray diffraction\u0000 (XRD), scanning electron microscope (SEM), and Raman spectroscopy. There was significant efficiency of the ZnO/rGO composite on the sensing performance for toluene. For specific gas fluxes, the nanostructured ZnO/rGO offered sufficient paths and region for vapor diffusion and adsorption. The\u0000 sensing test results illustrated that the nanostructured ZnO/rGO composite showed significant enhancement in the frequency shifts (△f) for toluene comparing to pure ZnO and rGO. Also, the ZnO/rGO-coated QCM sensor displayed a fast response (both the response and recovery times < 30\u0000 s) and reproducibility for sensing toluene gas at room temperature. We believe that the novel insights on ambient temperature gas sensing on nanostructured ZnO/rGO composite could provide a new strategy for preparing a highly efficient sensing materials.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"230 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86195521","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}
Pragya Mishra, Sachin Singh, P. Lohia, D. K. Dwivedi
A theoretical formulation of the long-period grating sensor is implemented with respect to efficient refractive indices of core and cladding. The obtained result is utilized further for determination of ERIs of core and cladding using graphical analytical method and multilayer fiber geometry. ERI values of primary guided core, bi and tri layer fiber geometry using MATLAB software. In the present paper effective refractive index of core and cladding for the two and three layers have been investigated. The cladding modes have also been calculated using Erdogan’s proposed three-layer geometry as well as two-layer graphical solution method. We have compared both the techniques, discussed the limitations of graphical solution method and the benefits of three-layer geometry.
{"title":"Theoretical Investigation of a Long Period Grating Sensor Employing Multilayer Fiber Geometry","authors":"Pragya Mishra, Sachin Singh, P. Lohia, D. K. Dwivedi","doi":"10.1166/sl.2020.4278","DOIUrl":"https://doi.org/10.1166/sl.2020.4278","url":null,"abstract":"A theoretical formulation of the long-period grating sensor is implemented with respect to efficient refractive indices of core and cladding. The obtained result is utilized further for determination of ERIs of core and cladding using graphical analytical method and multilayer fiber\u0000 geometry. ERI values of primary guided core, bi and tri layer fiber geometry using MATLAB software. In the present paper effective refractive index of core and cladding for the two and three layers have been investigated. The cladding modes have also been calculated using Erdogan’s proposed\u0000 three-layer geometry as well as two-layer graphical solution method. We have compared both the techniques, discussed the limitations of graphical solution method and the benefits of three-layer geometry.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82022993","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}
In this work, we prepared AgOx/Graphene composite material as the working electrode; the acetaminophen is determined by the electrochemical method. Using cyclic voltammetry electrochemical sensing method determined the current signal of acetaminophen (0.98 μM–15.6 μM) with electrolyte phosphate-buffer solution. When the voltage was operated as 0.42 V, an oxidation peak appeared in the linear concentration range and the least mean square was obtained R2 = 0.9922, and the detection limit was calculated as 0.26 μM. Using a differential pulse voltammetry electrochemical-sensing method, we determined the current signal of various acetaminophen concentrations (0.98 μM–7.8 μM). When the voltage is 0.33 V, R2 = 0.9996, and the detection limit is 0.15 μM. The material was characterized by TEM and XRD. It was also confirmed that Ag2O and Ag coexist (AgOx) on the surface of graphene, which facilitates the oxidation-reduction reaction of acetaminophen on the electrode.
{"title":"Fabrication of AgOx/Graphene-Based Acetaminophen Sensor","authors":"H. Luk, Yu-wen Yeh, R. Wu, Murthy Chavali","doi":"10.1166/sl.2020.4276","DOIUrl":"https://doi.org/10.1166/sl.2020.4276","url":null,"abstract":"In this work, we prepared AgOx/Graphene composite material as the working electrode; the acetaminophen is determined by the electrochemical method. Using cyclic voltammetry electrochemical sensing method determined the current signal of acetaminophen (0.98 μM–15.6 μM)\u0000 with electrolyte phosphate-buffer solution. When the voltage was operated as 0.42 V, an oxidation peak appeared in the linear concentration range and the least mean square was obtained R2 = 0.9922, and the detection limit was calculated as 0.26 μM. Using a differential\u0000 pulse voltammetry electrochemical-sensing method, we determined the current signal of various acetaminophen concentrations (0.98 μM–7.8 μM). When the voltage is 0.33 V, R2 = 0.9996, and the detection limit is 0.15 μM. The material was characterized\u0000 by TEM and XRD. It was also confirmed that Ag2O and Ag coexist (AgOx) on the surface of graphene, which facilitates the oxidation-reduction reaction of acetaminophen on the electrode.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90466054","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}
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