Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688337
B. B. Narakathu, A. S. G. Reddy, A. Eshkeiti, B. Bazuin, M. Atashbar
An efficient sensing system that detects heavy metal compounds, by employing opto-electrochemical based dual detection technique, has been successfully developed. A novel microfluidic flow cell consisting of an inlet and outlet port with a reservoir volume of 25 μl was designed and fabricated using acrylic material. An electrochemical sensor with gold (Au) interdigitated electrodes (IDE) on a glass substrate was used for the electrical impedance spectroscopy (EIS) of various heavy metal compounds. EIS performed on cadmium sulfide (CdS) and mercury sulfide (HgS) yielded picomolar (pM) concentration detection levels. Selective detection of heavy metal compounds was made possible based on optical signals produced in the Raman emission spectra. The response of this dual detection sensing system is analyzed and presented in this paper.
{"title":"Opto-electrochemical based dual detection of heavy metal compounds using a novel flow cell","authors":"B. B. Narakathu, A. S. G. Reddy, A. Eshkeiti, B. Bazuin, M. Atashbar","doi":"10.1109/ICSENS.2013.6688337","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688337","url":null,"abstract":"An efficient sensing system that detects heavy metal compounds, by employing opto-electrochemical based dual detection technique, has been successfully developed. A novel microfluidic flow cell consisting of an inlet and outlet port with a reservoir volume of 25 μl was designed and fabricated using acrylic material. An electrochemical sensor with gold (Au) interdigitated electrodes (IDE) on a glass substrate was used for the electrical impedance spectroscopy (EIS) of various heavy metal compounds. EIS performed on cadmium sulfide (CdS) and mercury sulfide (HgS) yielded picomolar (pM) concentration detection levels. Selective detection of heavy metal compounds was made possible based on optical signals produced in the Raman emission spectra. The response of this dual detection sensing system is analyzed and presented in this paper.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115673797","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688585
He Hu, Jun Zou, Youjun Deng
This paper reports the development of a novel smectite-polymer nanocomposite (SPN) microstrip sensor for both rapid quantification and long-term monitoring of aflatoxins. The smectite was modified with Ba2002B; cation exchange to improve its aflatoxin adsorption. SPN thin-films were synthesized on silicon substrates via layer-by-layer self-assembly. SPN microstrip arrays were patterned on glass substrates using stencil masks and enclosed in a microfluidic channel. This reduces the diffusion length and the adsorption time of aflatoxins, thereby resulting in fast response time (<; 10 min). A simple fluorometric quantification of aflatoxin concentration based on incident intensity modulation was developed to eliminate the need of a sophisticated fluorometer. A low detection limit of 6.09 ppb and a wide linear range of 5~80 ppb for aflatoxin B1 have been achieved.
{"title":"A novel smectite-polymer nanocomposite (SPN) microstrip sensor for rapid quantitative detection of aflatoxins","authors":"He Hu, Jun Zou, Youjun Deng","doi":"10.1109/ICSENS.2013.6688585","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688585","url":null,"abstract":"This paper reports the development of a novel smectite-polymer nanocomposite (SPN) microstrip sensor for both rapid quantification and long-term monitoring of aflatoxins. The smectite was modified with Ba2002B; cation exchange to improve its aflatoxin adsorption. SPN thin-films were synthesized on silicon substrates via layer-by-layer self-assembly. SPN microstrip arrays were patterned on glass substrates using stencil masks and enclosed in a microfluidic channel. This reduces the diffusion length and the adsorption time of aflatoxins, thereby resulting in fast response time (<; 10 min). A simple fluorometric quantification of aflatoxin concentration based on incident intensity modulation was developed to eliminate the need of a sophisticated fluorometer. A low detection limit of 6.09 ppb and a wide linear range of 5~80 ppb for aflatoxin B1 have been achieved.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114650604","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688429
F. Federici, R. Alesii, A. Colarieti, F. Graziosi, M. Faccio
The work deals with the design, implementation and validation of a battery powered wireless sensing platform for long term structural health monitoring. The platform (WESTmote) has been developed for use in a real world target application, a minimum two-year long post-earthquake crack monitoring campaign of a monumental building (the Basilica S. Maria di Collemaggio in L'Aquila, Italy). WESTmote is primarily oriented to the execution of strain and deformation measurements in harsh environments and natively supports resistive sensors interfacing. Low energy driven design, along with network robustness oriented software architecture, including communication stack and measurement related functions, are deeply analyzed. Flexibility of developed architecture for use in different monitoring scenarios is discussed. Finally, a detailed evaluation of proposed platform performances and lifetime based on experimental validation is presented.
该工作涉及电池供电的无线传感平台的设计、实现和验证，用于长期结构健康监测。该平台(WESTmote)已被开发用于现实世界的目标应用，即对一座纪念性建筑(意大利拉奎拉的Basilica S. Maria di Collemaggio)进行至少两年的震后裂缝监测。WESTmote主要面向在恶劣环境中执行应变和变形测量，并支持电阻传感器接口。深入分析了低能耗驱动设计和面向网络鲁棒性的软件体系结构，包括通信栈和测量相关功能。讨论了开发的体系结构在不同监控场景中使用的灵活性。最后，在实验验证的基础上，对所提出的平台性能和寿命进行了详细的评估。
{"title":"Design and validation of a wireless sensor node for long term structural health monitoring","authors":"F. Federici, R. Alesii, A. Colarieti, F. Graziosi, M. Faccio","doi":"10.1109/ICSENS.2013.6688429","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688429","url":null,"abstract":"The work deals with the design, implementation and validation of a battery powered wireless sensing platform for long term structural health monitoring. The platform (WESTmote) has been developed for use in a real world target application, a minimum two-year long post-earthquake crack monitoring campaign of a monumental building (the Basilica S. Maria di Collemaggio in L'Aquila, Italy). WESTmote is primarily oriented to the execution of strain and deformation measurements in harsh environments and natively supports resistive sensors interfacing. Low energy driven design, along with network robustness oriented software architecture, including communication stack and measurement related functions, are deeply analyzed. Flexibility of developed architecture for use in different monitoring scenarios is discussed. Finally, a detailed evaluation of proposed platform performances and lifetime based on experimental validation is presented.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117241904","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688180
Kirit Chatterjee, H. Lam, R. Robucci, G. Rao, Y. Kostov
A remotely-measured fluorescence-based temperature measurement system designed for neonatal care is built and presented using a low-cost, off-the-shelf camera-phone image sensor. The fluorophore-based sensor salve removes the need of attaching thermistor probes using adhesives to the neonate's skin; and therefore reduces the risk of epidermal stripping, microbial infections, etc. The system performs low-cost yet precise remote ratiometric measurements of our thermometric fluorescent salve using only a 10-bit, 120-FPS CMOS imager. An FPGA handles control and capture of image data in the region of interest with frames synchronized with a pulsing illuminator. A minimalistic algorithm using basic pixel-summations and division to compute a ratio is presented, suitable for implementation on a minimal embedded system. The resolution of the system is reported to be at least 0.18 degrees Celcius.
{"title":"Low-cost fluorescence-based temperature sensing system for neonatal care","authors":"Kirit Chatterjee, H. Lam, R. Robucci, G. Rao, Y. Kostov","doi":"10.1109/ICSENS.2013.6688180","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688180","url":null,"abstract":"A remotely-measured fluorescence-based temperature measurement system designed for neonatal care is built and presented using a low-cost, off-the-shelf camera-phone image sensor. The fluorophore-based sensor salve removes the need of attaching thermistor probes using adhesives to the neonate's skin; and therefore reduces the risk of epidermal stripping, microbial infections, etc. The system performs low-cost yet precise remote ratiometric measurements of our thermometric fluorescent salve using only a 10-bit, 120-FPS CMOS imager. An FPGA handles control and capture of image data in the region of interest with frames synchronized with a pulsing illuminator. A minimalistic algorithm using basic pixel-summations and division to compute a ratio is presented, suitable for implementation on a minimal embedded system. The resolution of the system is reported to be at least 0.18 degrees Celcius.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120848810","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688161
E. Brown, E. Mendoza, Y. Kuznetsova, A. Neumann, S. Brueck
During the past several years we have utilized our nanofluidic-chip technology and high-resolution frequency-domain THz spectroscopy to detect absorption signatures in biomolecules and bioparticles of various types, especially the nucleic acids. Some of the signatures have been surprisingly narrow (<; 20 GHz FWHM), leading to the hypothesis that the nanofluidic chips can enhance certain vibrational resonances because of their concentrating and linearizing effects. In this work, we take the technology one step further by utilizing electrophoretic control of the absorbing biomolecules. A demonstration is provided of the variation in THz transmission through aqueous Lambda DNA at fixed frequency at one of its strongest sub-THz solutions. The THz transmission is found to be highly correlated to the electrophoretic current in the nanochannels, and to decrease with time. This is consistent with an increasing DNA concentration, or increasing oscillator strength, by the electrophoretic effect.
{"title":"THz signatures of DNA in nanochannels under electrophoretic control","authors":"E. Brown, E. Mendoza, Y. Kuznetsova, A. Neumann, S. Brueck","doi":"10.1109/ICSENS.2013.6688161","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688161","url":null,"abstract":"During the past several years we have utilized our nanofluidic-chip technology and high-resolution frequency-domain THz spectroscopy to detect absorption signatures in biomolecules and bioparticles of various types, especially the nucleic acids. Some of the signatures have been surprisingly narrow (<; 20 GHz FWHM), leading to the hypothesis that the nanofluidic chips can enhance certain vibrational resonances because of their concentrating and linearizing effects. In this work, we take the technology one step further by utilizing electrophoretic control of the absorbing biomolecules. A demonstration is provided of the variation in THz transmission through aqueous Lambda DNA at fixed frequency at one of its strongest sub-THz solutions. The THz transmission is found to be highly correlated to the electrophoretic current in the nanochannels, and to decrease with time. This is consistent with an increasing DNA concentration, or increasing oscillator strength, by the electrophoretic effect.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121236713","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688530
Cheng-Chun Chang, Chien-Ta Wu, Y. Lin, Meng-Huang Gu
Traditionally, water turbidity can be measured based on the absorption or scattering effects. Water flow velocity can be measured based on Doppler frequency shift (DFS) estimation. In this work, we aim to provide a simple, robust, low-cost and accurate method for both measurements by using visible light communication (VLC) modules. Signal processing methods to extract the water turbidity and water flow speed based on the VLC transceiver modules are designed and implemented.
{"title":"Water velocimeter and turbidity-meter using visible light communication modules","authors":"Cheng-Chun Chang, Chien-Ta Wu, Y. Lin, Meng-Huang Gu","doi":"10.1109/ICSENS.2013.6688530","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688530","url":null,"abstract":"Traditionally, water turbidity can be measured based on the absorption or scattering effects. Water flow velocity can be measured based on Doppler frequency shift (DFS) estimation. In this work, we aim to provide a simple, robust, low-cost and accurate method for both measurements by using visible light communication (VLC) modules. Signal processing methods to extract the water turbidity and water flow speed based on the VLC transceiver modules are designed and implemented.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"04 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127180896","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688463
S. Kehrberg, Markus Dorwarth, M. Heitz, Carsten Geckeler, J. Mehner
MEMS vibratory angular rate sensors use the working principle of coupling a drive vibration mode with an orthogonal sense mode via Coriolis force. The parasitic coupling between the two eigenmodes caused by fabrication tolerances is called quadrature. Former work modeled quadrature effects between drive and detection mode by only adding a coupling term in the stiffness matrix. The new method is adding an inertial coupling term to the system mass matrix. This leads to a large decrease of the calculation time in combination with a higher accuracy.
{"title":"Advanced methods for calculating quadrature errors of MEMS gyroscopes","authors":"S. Kehrberg, Markus Dorwarth, M. Heitz, Carsten Geckeler, J. Mehner","doi":"10.1109/ICSENS.2013.6688463","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688463","url":null,"abstract":"MEMS vibratory angular rate sensors use the working principle of coupling a drive vibration mode with an orthogonal sense mode via Coriolis force. The parasitic coupling between the two eigenmodes caused by fabrication tolerances is called quadrature. Former work modeled quadrature effects between drive and detection mode by only adding a coupling term in the stiffness matrix. The new method is adding an inertial coupling term to the system mass matrix. This leads to a large decrease of the calculation time in combination with a higher accuracy.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"2247 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127472067","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688455
Terence C. Randall, I. Mahbub, S. Islam
This paper demonstrates a reconfigurable, pipelined analog-to-digital converter (ADC) that is designed for ultra-low power consumption through the use of weak inversion region-biased transistors. In addition, the converter is able to reconfigure itself into three different modes of operation based on the input signal or a third party signal such as body motion. An adaptation unit is presented which automatically distinguishes high frequency biosignals from low frequency ones and configures the ADC in the appropriate mode of operation. The adaptation unit gives two-bits of control selecting between 8-bit or 10-bit resolution and 73.7 KS/s or 737 KS/s sampling rate. The power consumption of the pipelined ADC and adaptation unit are 680 μW and 180 μW, respectively, with a 1.8 V supply voltage. The core circuit occupies only 0.425 mm2 area.
{"title":"A low power auto-reconfigurable pipelined ADC for implantable biomedical applications","authors":"Terence C. Randall, I. Mahbub, S. Islam","doi":"10.1109/ICSENS.2013.6688455","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688455","url":null,"abstract":"This paper demonstrates a reconfigurable, pipelined analog-to-digital converter (ADC) that is designed for ultra-low power consumption through the use of weak inversion region-biased transistors. In addition, the converter is able to reconfigure itself into three different modes of operation based on the input signal or a third party signal such as body motion. An adaptation unit is presented which automatically distinguishes high frequency biosignals from low frequency ones and configures the ADC in the appropriate mode of operation. The adaptation unit gives two-bits of control selecting between 8-bit or 10-bit resolution and 73.7 KS/s or 737 KS/s sampling rate. The power consumption of the pipelined ADC and adaptation unit are 680 μW and 180 μW, respectively, with a 1.8 V supply voltage. The core circuit occupies only 0.425 mm2 area.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124843757","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688437
P. Mostafalu, S. Sonkusale
In this paper, we present a flexible supercapacitor on paper substrate consisting of gel-based electrolyte sandwiched between two nanoparticle modified nickel-based electrodes. The inherent porosity of the paper provides a porous template for electrodeposition of nickel micro- and nano-particles through them, increasing the overall surface area of the electrodes. This results in high-density supercapacitor with exceptional energy density. Since the fabrication process can be conducted in ambient environment without a need for cleanroom using low cost materials such as paper, it is highly suitable for low-cost sensors and medical diagnostics. We characterize the supercapacitor using pulsed transient measurements. Results indicate that for a 17cm2 surface area, we achieve a capacitance of 10 Farads with just 6mΩ series resistance.
{"title":"Paper-based super-capacitor using micro and nano particle deposition for paper-based diagnostics","authors":"P. Mostafalu, S. Sonkusale","doi":"10.1109/ICSENS.2013.6688437","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688437","url":null,"abstract":"In this paper, we present a flexible supercapacitor on paper substrate consisting of gel-based electrolyte sandwiched between two nanoparticle modified nickel-based electrodes. The inherent porosity of the paper provides a porous template for electrodeposition of nickel micro- and nano-particles through them, increasing the overall surface area of the electrodes. This results in high-density supercapacitor with exceptional energy density. Since the fabrication process can be conducted in ambient environment without a need for cleanroom using low cost materials such as paper, it is highly suitable for low-cost sensors and medical diagnostics. We characterize the supercapacitor using pulsed transient measurements. Results indicate that for a 17cm2 surface area, we achieve a capacitance of 10 Farads with just 6mΩ series resistance.","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124937145","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}
Pub Date : 2013-12-19DOI: 10.1109/ICSENS.2013.6688312
K. Jayant, K. Auluck, E. Kan
When DNA binds to a transistor, the surface potential (ψo) shifts in response to charges located within a Debye length. The native surface charge and screening capacitance are often described by the Gouy-Chapman (GC) double-layer model, which uses the Poisson-Boltzmann (PB) distribution for ions. GC model neglects screening within the DNA layer and is often insufficient to explain experimentally observed Δψo (40-80mV). We show that surface buffering capacity, E-field in the underlying oxide and ion screening in the DNA layer strongly influence sensitivity and lead to Δψo values larger than the GC model prediction. We present a formulation based on the Born charge dielectric interaction and find that a lowering in permittivity within the DNA lattice leads to ion exclusion and lower screening. We find that sensitivity to DNA charge is highest when the surface is closest to the point of zero charge (PZC).
{"title":"The DNA transistor interface: The interplay between pH, electric field and membrane screening dictates sensitivity","authors":"K. Jayant, K. Auluck, E. Kan","doi":"10.1109/ICSENS.2013.6688312","DOIUrl":"https://doi.org/10.1109/ICSENS.2013.6688312","url":null,"abstract":"When DNA binds to a transistor, the surface potential (ψo) shifts in response to charges located within a Debye length. The native surface charge and screening capacitance are often described by the Gouy-Chapman (GC) double-layer model, which uses the Poisson-Boltzmann (PB) distribution for ions. GC model neglects screening within the DNA layer and is often insufficient to explain experimentally observed Δψo (40-80mV). We show that surface buffering capacity, E-field in the underlying oxide and ion screening in the DNA layer strongly influence sensitivity and lead to Δψo values larger than the GC model prediction. We present a formulation based on the Born charge dielectric interaction and find that a lowering in permittivity within the DNA lattice leads to ion exclusion and lower screening. We find that sensitivity to DNA charge is highest when the surface is closest to the point of zero charge (PZC).","PeriodicalId":258260,"journal":{"name":"2013 IEEE SENSORS","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126042520","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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