Pub Date : 2017-07-01DOI: 10.1109/NANO.2017.8117329
Sumeet Kalra, M. J. Kumar, A. Dhawan
This work introduces a novel biosensing device which utilizes the dielectric constant property of biomolecules to induce the electrostatic doping in the Dielectric Modulated Tunnel Field Effect Transistor biosensor. Using calibrated 3D TCAD simulations, the efficacy of the proposed device as a biosensor is shown. The dopant implantation-free approach results in simplified fabrication process with reduced thermal budget and hence, increased suitability to 3D integration and fabrication on glass or plastic substrates. The device is also expected to give tolerance against dopant fluctuations induced variability in the detection sensitivity.
{"title":"Induced dielectric modulated tunnel field effect transistor biosensor (I-DMTFET): Proposal and investigation","authors":"Sumeet Kalra, M. J. Kumar, A. Dhawan","doi":"10.1109/NANO.2017.8117329","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117329","url":null,"abstract":"This work introduces a novel biosensing device which utilizes the dielectric constant property of biomolecules to induce the electrostatic doping in the Dielectric Modulated Tunnel Field Effect Transistor biosensor. Using calibrated 3D TCAD simulations, the efficacy of the proposed device as a biosensor is shown. The dopant implantation-free approach results in simplified fabrication process with reduced thermal budget and hence, increased suitability to 3D integration and fabrication on glass or plastic substrates. The device is also expected to give tolerance against dopant fluctuations induced variability in the detection sensitivity.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116065549","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117420
T. Xie, M. Dreyer, D. Bowen, D. Hinkel, R. Butera, Charles Kraffit, I. Mayergoyz
In this paper, we present a technique for local measurements of the surface potential in the presence of a biasing current flow through a sample. This technique can be implemented by using standard scanning tunneling microscopy (STM) equipment. It is demonstrated that this potentiometry technique can be useful for in-situ sample characterization in ultra-high vacuum (UHV).
{"title":"A simple implementation of scanning tunneling potentiometry with a standard scanning tunneling microscope","authors":"T. Xie, M. Dreyer, D. Bowen, D. Hinkel, R. Butera, Charles Kraffit, I. Mayergoyz","doi":"10.1109/NANO.2017.8117420","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117420","url":null,"abstract":"In this paper, we present a technique for local measurements of the surface potential in the presence of a biasing current flow through a sample. This technique can be implemented by using standard scanning tunneling microscopy (STM) equipment. It is demonstrated that this potentiometry technique can be useful for in-situ sample characterization in ultra-high vacuum (UHV).","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122877843","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117440
Sunny Raj, Dwaipayan Chakraborty, Sumit Kumar Jha
Nanoscale memristor crossbars provide a natural fabric for in-memory computing and have recently been shown to efficiently perform exact logical operations by exploiting the flow of current through crossbar interconnects. In this paper, we extend the flow-based crossbar computing approach to approximate stochastic computing. First, we show that the natural flow of current through probabilistically-switching memristive nano-switches in crossbars can be used to perform approximate stochastic computing. Second, we demonstrate that optimizing the approximate stochastic computations in terms of the number of required random bits leads to stochastic computing using bit-vector stochastic streams of varying bit-widths — a hybrid of the traditional full-width bit-vector computing approach and the traditional bit-stream stochastic computing methodology. This hybrid approach based on bit-vector stochastic streams of different bit-widths can be efficiently implemented using an in-memory nanoscale memristive crossbar computing framework.
{"title":"In-memory flow-based stochastic computing on memristor crossbars using bit-vector stochastic streams","authors":"Sunny Raj, Dwaipayan Chakraborty, Sumit Kumar Jha","doi":"10.1109/NANO.2017.8117440","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117440","url":null,"abstract":"Nanoscale memristor crossbars provide a natural fabric for in-memory computing and have recently been shown to efficiently perform exact logical operations by exploiting the flow of current through crossbar interconnects. In this paper, we extend the flow-based crossbar computing approach to approximate stochastic computing. First, we show that the natural flow of current through probabilistically-switching memristive nano-switches in crossbars can be used to perform approximate stochastic computing. Second, we demonstrate that optimizing the approximate stochastic computations in terms of the number of required random bits leads to stochastic computing using bit-vector stochastic streams of varying bit-widths — a hybrid of the traditional full-width bit-vector computing approach and the traditional bit-stream stochastic computing methodology. This hybrid approach based on bit-vector stochastic streams of different bit-widths can be efficiently implemented using an in-memory nanoscale memristive crossbar computing framework.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122101138","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117433
D. Fabiani, A. Camprini, C. Vanga-Bouanga, M. Frechette
This paper deals with space charge accumulation of LDPE-based nanocomposites containing graphene oxide as nanofiller. Space charge measurements showed huge charge injection and accumulation in the base LDPE material. In particular, at room temperature a positive charge packet was observed moving rapidly from the anode to the cathode, enhancing space charge accumulation in the insulation bulk. On the contrary, space charge buildup was significantly reduced in nanocomposites with a filler content smaller than 0.1 wt%. Increasing temperature, the base material accumulate much less charge therefore the effect of the nanofiller becomes less evident than at room temperature.
{"title":"Optimization of space charge accumulation in LDPE nanocomposites containing graphene oxide","authors":"D. Fabiani, A. Camprini, C. Vanga-Bouanga, M. Frechette","doi":"10.1109/NANO.2017.8117433","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117433","url":null,"abstract":"This paper deals with space charge accumulation of LDPE-based nanocomposites containing graphene oxide as nanofiller. Space charge measurements showed huge charge injection and accumulation in the base LDPE material. In particular, at room temperature a positive charge packet was observed moving rapidly from the anode to the cathode, enhancing space charge accumulation in the insulation bulk. On the contrary, space charge buildup was significantly reduced in nanocomposites with a filler content smaller than 0.1 wt%. Increasing temperature, the base material accumulate much less charge therefore the effect of the nanofiller becomes less evident than at room temperature.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128211989","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117277
Xiaolu Zhu, Yifei Yang
Extracellular matrix (ECM) is a non-cellular material that offers not only structural/mechanical support but also chemical and physical guidance cues for cells. Cellular self-organization is highly related to the property of ECM. Here, we investigate the 3D hollow spheroid formation process of vascular mesenchymal cells (VMCs) at the interfaces between hydrogel ECMs with different mechanical properties. The combined hydrogel geometrically consisted of two subparts differing in their stiffness and had geometric interfaces between those two subparts. The experimental results show that 3D hollow spheroids with large cavity generated around interfacial regions of hydrogels, which were not observed in a common 3D culture with sole-stiffness hydrogel. The hollow spheroids emerged because of the tailored groove dimensions of hydrogel interface and the concentration gradients of proteins and cells across the hydrogel interfaces. This experimental demonstration provides a potential method to improve the biological properties of multicellular spheroids for fundamental and therapeutic applications.
{"title":"Hollow spheroid formation by cells at the mechanical interface of hyaluronic acid hydrogels in three dimensions","authors":"Xiaolu Zhu, Yifei Yang","doi":"10.1109/NANO.2017.8117277","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117277","url":null,"abstract":"Extracellular matrix (ECM) is a non-cellular material that offers not only structural/mechanical support but also chemical and physical guidance cues for cells. Cellular self-organization is highly related to the property of ECM. Here, we investigate the 3D hollow spheroid formation process of vascular mesenchymal cells (VMCs) at the interfaces between hydrogel ECMs with different mechanical properties. The combined hydrogel geometrically consisted of two subparts differing in their stiffness and had geometric interfaces between those two subparts. The experimental results show that 3D hollow spheroids with large cavity generated around interfacial regions of hydrogels, which were not observed in a common 3D culture with sole-stiffness hydrogel. The hollow spheroids emerged because of the tailored groove dimensions of hydrogel interface and the concentration gradients of proteins and cells across the hydrogel interfaces. This experimental demonstration provides a potential method to improve the biological properties of multicellular spheroids for fundamental and therapeutic applications.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128234885","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117273
E. Cerro-Prada, F. Escolano, F. Varela
This paper presents a Monte Carlo computational approach for nanoscale simulation of photocatalytic activity of spherical titania nanoparticles in a cement substrate. The work represents the first theoretical attempt to address the kinetics of a photocatalytic process occurring at nano-TiO2 inserted in a cement matrix. The herein reported Monte Carlo simulation includes charge diffusion and trapping, charge recombination, charge transport and adsorbents mineralization. Specifically, the cement microstructure influence on the photocatalysis is studied. It was found that inherent cement porosity promotes adsorption of inorganic species, charge carriers trapping in the surface and photon absorption, which results in enhanced TiO2 photocatalysis.
{"title":"Computational nanotechnology to predict photocatalysis of titania nanoparticles in cement-based materials","authors":"E. Cerro-Prada, F. Escolano, F. Varela","doi":"10.1109/NANO.2017.8117273","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117273","url":null,"abstract":"This paper presents a Monte Carlo computational approach for nanoscale simulation of photocatalytic activity of spherical titania nanoparticles in a cement substrate. The work represents the first theoretical attempt to address the kinetics of a photocatalytic process occurring at nano-TiO2 inserted in a cement matrix. The herein reported Monte Carlo simulation includes charge diffusion and trapping, charge recombination, charge transport and adsorbents mineralization. Specifically, the cement microstructure influence on the photocatalysis is studied. It was found that inherent cement porosity promotes adsorption of inorganic species, charge carriers trapping in the surface and photon absorption, which results in enhanced TiO2 photocatalysis.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129478601","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117378
Susan Buckhout‐White, D. Hastman, C. Person, J. Melinger, M. Ancona, E. Goldman, Igor L. Medintz, Carl W. Brown
The progress within the field of DNA nanotechnology has shown DNA to be an ideal material for the self-assembly of complex two-dimensional and three-dimensional structures. In addition to forming a wide range of structural geometries, DNA has been demonstrated as an exemplary scaffold. In this work we utilize this scaffolding ability to create photonic DNA switches that respond to both DNA and enzymatic inputs and produce complex logic based outputs.
{"title":"Reconfigurable DNA nanostructures for detection of multiple DNA and enzymatic inputs","authors":"Susan Buckhout‐White, D. Hastman, C. Person, J. Melinger, M. Ancona, E. Goldman, Igor L. Medintz, Carl W. Brown","doi":"10.1109/NANO.2017.8117378","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117378","url":null,"abstract":"The progress within the field of DNA nanotechnology has shown DNA to be an ideal material for the self-assembly of complex two-dimensional and three-dimensional structures. In addition to forming a wide range of structural geometries, DNA has been demonstrated as an exemplary scaffold. In this work we utilize this scaffolding ability to create photonic DNA switches that respond to both DNA and enzymatic inputs and produce complex logic based outputs.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130404007","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117347
Neelima Sangeneni, N. Bhat, S. Shivashankar
Using microwave-assisted synthesis in the solution medium, superparamagnetic, nanocrystalline cobalt ferrite thin films have been deposited on integrated inductors to increase inductance density. Cobalt ferrite thin films (CFTF), ∼820 nm thick, can be deposited in 10 min at ∼190°C, making the process CMOS-compatible. The as-prepared CFTF has a saturation magnetization (MS) of 238 emu/cc and coercivity (Hc) of 32 Oe at room temperature for a particle size of ∼ 8 nm. The inductance of an on-chip inductor increased from 7.1 nH to 9.9 nH at 5 GHz when the CFTF was deposited on it, an enhancement of nearly 40%.
{"title":"Superparamagnetic, nanocrystalline cobalt ferrite thin films as magnetic core of integrated RF inductors","authors":"Neelima Sangeneni, N. Bhat, S. Shivashankar","doi":"10.1109/NANO.2017.8117347","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117347","url":null,"abstract":"Using microwave-assisted synthesis in the solution medium, superparamagnetic, nanocrystalline cobalt ferrite thin films have been deposited on integrated inductors to increase inductance density. Cobalt ferrite thin films (CFTF), ∼820 nm thick, can be deposited in 10 min at ∼190°C, making the process CMOS-compatible. The as-prepared CFTF has a saturation magnetization (MS) of 238 emu/cc and coercivity (Hc) of 32 Oe at room temperature for a particle size of ∼ 8 nm. The inductance of an on-chip inductor increased from 7.1 nH to 9.9 nH at 5 GHz when the CFTF was deposited on it, an enhancement of nearly 40%.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124241108","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117304
M. Frechette, S. Ghafarizadeh, T. T. Anh, É. David
The case involving Low-density Polyethylene (LDPE) containing nano-MgO is revisited here with the main aim of verifying the effect of the fabrication technique. LDPE powder and MgO unfunctionalized nanoparticles were used in conjunction with an impact ball-milling method. Samples consisting of neat LDPE and nanocomposites containing 1 and 5 wt% of MgO were prepared. Several material and dielectric properties were investigated. The polymer samples prepared were found to exhibit a much invariant value of the degree of crystallinity, around 41%. From the erosion experiment, the conclusion can be drawn that the surface resistance to erosion caused by discharges grows with the content of nanofillers increasing.
{"title":"Dielectric properties of Polyethylene/MgO nanocomposites fabricated using ball-milling","authors":"M. Frechette, S. Ghafarizadeh, T. T. Anh, É. David","doi":"10.1109/NANO.2017.8117304","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117304","url":null,"abstract":"The case involving Low-density Polyethylene (LDPE) containing nano-MgO is revisited here with the main aim of verifying the effect of the fabrication technique. LDPE powder and MgO unfunctionalized nanoparticles were used in conjunction with an impact ball-milling method. Samples consisting of neat LDPE and nanocomposites containing 1 and 5 wt% of MgO were prepared. Several material and dielectric properties were investigated. The polymer samples prepared were found to exhibit a much invariant value of the degree of crystallinity, around 41%. From the erosion experiment, the conclusion can be drawn that the surface resistance to erosion caused by discharges grows with the content of nanofillers increasing.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123348359","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 : 2017-07-01DOI: 10.1109/NANO.2017.8117446
Z. Qin, Fan Jibin, Jianmin Chen
Particles trapping and position control method based on microfluidic is proposed. The mechanism of particle displacement based on microfluidic is analyzed, and the effect of the parameters, for example, the radial error and the angle error of microtubules and microtubules arrangement, on particle control performance are evaluated quantitatively. The feasibility of the proposed method is proved by experiments. The experiment results show the displacement of micro particle can be controlled by constructing micro flow field. And arbitrary sizes and shapes particles can be trapped and controlled for directional and quantitative displacement with the proper flow field parameters. Contactless trapping and position for particles can be realized with the proposed method.
{"title":"Performance analysis and experimental study of particle control based on fluid","authors":"Z. Qin, Fan Jibin, Jianmin Chen","doi":"10.1109/NANO.2017.8117446","DOIUrl":"https://doi.org/10.1109/NANO.2017.8117446","url":null,"abstract":"Particles trapping and position control method based on microfluidic is proposed. The mechanism of particle displacement based on microfluidic is analyzed, and the effect of the parameters, for example, the radial error and the angle error of microtubules and microtubules arrangement, on particle control performance are evaluated quantitatively. The feasibility of the proposed method is proved by experiments. The experiment results show the displacement of micro particle can be controlled by constructing micro flow field. And arbitrary sizes and shapes particles can be trapped and controlled for directional and quantitative displacement with the proper flow field parameters. Contactless trapping and position for particles can be realized with the proposed method.","PeriodicalId":292399,"journal":{"name":"2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO)","volume":"392 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123533066","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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