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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Peter Ledochowitsch Elisa Olivero Tim Blanche Michel M. Maharbiz Bioengineering Department University of California EECS department University of California Redwood Center for Theoretical Neuroscience and the Helen Wills Neuroscience Institute University of California Electrical Engineering and Computer Science University of California

ISBN: (纸本)9781424441211

In this paper we report for the first time the design, fabrication and characterization of an optically transparent electrode array for micro-electrocorticography. We present a 49-channel μECoG array with an electrode pitch of 800 μm and a 16-channel linear μECoG array with an electrode pitch of 200 μm. The backing material was Parylene C. Transparent, sputtered indium tin oxide (ITO) was used in conjunction with e-beam evaporated gold to fabricate the electrodes. We provide electrochemical impedance characterization and light transmission data for the fabricated devices.

关键词： Electrodes Hyalin INDIUM TIN OXIDE arrays PITCHES pitch substrate material fabrication

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Pathogen and inflammatory components removal from blood using cell margination

Pathogen and inflammatory components removal from blood usin...

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15th International Conference on Miniaturized Systems for Chemistry and Life sciences 2011, MicroTAS 2011

作者： Hou, H.W. Gan, H.Y. Bhagat, A.A.S. Li, L.D. Lim, C.T. Han, J. Centre Singapore Singapore Division of Bioengineering National University of Singapore Singapore Singapore Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA United States Harvard-MIT Division of Health Sciences and Technology Massachusetts Institute of Technology Cambridge MA United States Mechanobiology Institute National University of Singapore Singapore Singapore Department of Biological Engineering Massachusetts Institute of Technology Cambridge MA United States

ISBN: (纸本)9781618395955

Sepsis is an adverse systemic inflammatory response caused by microbial infection in blood. This paper reports a novel microfluidic approach for non-specific removal of both pathogen and inflammatory cellular components from whole blood directly using cell margination. A high microbial removal efficiency of > 80% was achieved in our device consisting of 2 cascaded microchannels in series, thus allowing a 2-stage removal of microbes in a single step. ∼90% of platelets and leukocytes were also successfully removed from the blood which can be used to modulate the host inflammatory responses and potentially as a blood cleansing method for sepsis treatment.

关键词： Cells

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LOW-FREQUENCY ELECTRONIC NOISE IN GRAPHENE TRANSISTORS: COMPARISON WITH CARBON NANOTUBES

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International Journal of High Speed Electronics and Systems 2011年第1期20卷 161-170页

作者： GUANXIONG LIU WILLIAM STILLMAN SERGEY RUMYANTSEV MICHAEL SHUR ALEXANDER A. BALANDIN Nano-Device Laboratory Department of Electrical Engineering Materials Science and Engineering Program Bourns College of Engineering University of California – Riverside Riverside California 92521 USA Center for Integrated Electronics and Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy New York 12180 USA Ioffe Physico-Technical Institute Russian Academy of Sciences St. Petersburg 194021 Russia Nano-Device Laboratory Department of Electrical Engineering and Materials Science Engineering Program Bourns College of Engineering University of California – Riverside Riverside California 92521 USA

We report results of the experimental investigation of the low-frequency noise in graphene transistors. The graphene devices were measured in three-terminal configuration. The measurements revealed low flicker noise levels with the normalized noise spectral density close to 1/f (f is the frequency) and the Hooge parameter α H ~10 -3 . Both top-gate and back-gate devices were studied. The analysis of the noise spectral-density dependence on the gate biases helped us to elucidate the noise sources in these devices. We compared the noise performance of graphene devices with that of carbon nanotube devices. It was determined that graphene devices works better than carbon nanotube devices in terms of the low-frequency noise. The obtained results are important for graphene electronic, communication and sensor applications.

关键词： graphene 1/ f noise carbon nanotubes low-frequency noise graphene transistors

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Low-Frequency Noise in “Graphene-Like” Exfoliated Thin Films of Topological Insulators

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MRS Online Proceedings Library 2011年第1期1344卷 1-5页

作者： M. Z. Hossain S. L. Rumyantsev K. M. F. Shahil D. Teweldebrhan M. Shur A. A. Balandin Nano-Device Laboratory Department of Electrical Engineering and Materials Science and Engineering Program University of California Riverside USA Department of Electrical Computer and Systems Engineering and Center for Integrated Electronics Rensselaer Polytechnic Institute Troy USA Ioffe Institute Russian Academy of Sciences St. Petersburg Russia

We report results of the study of the low-frequency noise in thin films of bismuth selenide topological insulators, which were mechanically exfoliated from bulk crystals via “graphene-like” procedures. From the resistance dependence on the film thickness, it was established that the surface conduction contributions to electron transport were dominant. It was found that the current fluctuations have the noise spectral density SI ∞ 1/ f (where f is the frequency) for the frequency range up to 10 kHz. The obtained noise data are important for transport experiments with topological insulators and for any proposed device applications of these materials.

关键词： devices electrical properties thin film

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A gadolinium doped superlattice GaN schottky diode for neutron detection

A gadolinium doped superlattice GaN schottky diode for neutr...

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2011 ANS Annual Meeting

作者： Wang, Jinghui Kandlakunta, Praneeth Kent, Thomas F. Carlin, John Hoy, Daniel R. Myers, Roberto C. Cao, Lei Nuclear Engineering Program Department of Mechanical and Aerospace Engineering Ohio State University Columbus OH 43210 United States Department of Materials Science and Engineering Ohio State University Columbus OH 43210 United States Department of Electrical and Computer Engineering Ohio State University Columbus OH 43210 United States Institute for Materials Research Ohio State University Columbus OH 43210 United States Department of Physics Ohio State University Columbus OH 43210 United States

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Autonomous passive light tracking utilizing single-wall carbon nanotube enhanced opto-thermo-mechanical elastomer actuators

Autonomous passive light tracking utilizing single-wall carb...

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International Conference on Solid State Sensors and Actuators (TRANSDUCERS)

作者： Ye Liu Chensha Li Chi-Wei Lo Hongrui Jiang Electrical and Computer Engineering Department University of Wisconsin Madison Madison WI USA Materials Science Program University of Wisconsin Madison Madison WI USA

We have developed novel opto-thermo-mechanical actuators by effectively distributing a significant amount of single-wall carbon nanotube (SWCNT, up to 0.7%w/w) into liquid crystal elastomer (LCE) matrices. These SWCNT/LCE actuators exhibit a great potential to be utilized in MEMS applications, as they respond to a wide spectrum of visible/near-infrared light, and possess a large reversible compressive strain (up to 35%) when stimulated. Autonomous and passive light tracking is demonstrated here as one of the applications. With a simple design, the actuators are able to adaptively tilt a solar cell towards the light source by a degree of ~15° (with an incident light intensity of 1.6 kW/m 2 ). As a result, the photocurrent output of the solar cell is significantly enhanced (up to 247.10%) without any other control system or external energy source.

关键词： Actuators Photovoltaic cells Photoconductivity Films Carbon nanotubes Light sources Micromechanical devices

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A transparent ECoG array for simultaneous recording and optogenetic stimulation

A transparent ECoG array for simultaneous recording and opto...

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33rd Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBS 2011

作者： Ledochowitsch, Peter Olivero, Elisa Blanche, Tim Maharbiz, Michel M. Bioengineering Department University of California Berkeley CA 94720 United States EECS Department University of California Berkeley CA 94720 United States Polytechnic of Turin Turin Italy Redwood Center for Theoretical Neuroscience Helen Wills Neuroscience Institute University of California Berkeley CA 94720 United States Electrical Engineering and Computer Science University of California Berkeley CA 94720 United States

ISBN: (纸本)9781424441211

In this paper we report for the first time the design, fabrication and characterization of an optically transparent electrode array for micro-electrocorticography. We present a 49-channel ECoG array with an electrode pitch of 800 m and a 16-channel linear ECoG array with an electrode pitch of 200 m. The backing material was Parylene C. Transparent, sputtered indium tin oxide (ITO) was used in conjunction with e-beam evaporated gold to fabricate the electrodes. We provide electrochemical impedance characterization and light transmission data for the fabricated devices. © 2011 IEEE.

关键词： Light transmission

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Measuring Cell Mass and Growth Using Micro-Nanotechnology

Measuring Cell Mass and Growth Using Micro-Nanotechnology

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The 5th Shanghai International Conference on Biophysics and Molecular biology 第五届上海国际力生物学学术会议(SICBM2011)

作者： K.Jimmy Hsia Rashid Bashir Kidong Park Larry Millet Huan Li Namjung Kim Xiaozhong Jin Gabriel Popescu N.R.Aluru Department of Mechanical Science & Engineering Department of BioengineeringMicro and Nanotechnology LaboratoryUniversity of IllinoisUrbanaIL 61801USA Department of BioengineeringMicro and Nanotechnology LaboratoryDepartment of Electrical and Computer Engineering5Beckman Institute of Advanced Science and TechnologyUniversity of IllinoisUrbanaIL 61801USA Department of Electrical and Computer EngineeringUniversity of IllinoisUrbanaIL 61801USA Department of Mechanical Science & EngineeringUniversity of IllinoisUrbanaIL 61801USA Department of Electrical and Computer EngineeringBeckman Institute of Advanced Science and TechnologyUniversity of IllinoisUrbanaIL 61801USA Department of Mechanical Science & EngineeringMicro and Nanotechnology LaboratoryBeckman Institute of Advanced Science and TechnologyUniversity of IllinoisUrbanaIL 61801USAUniversity of IllinoisUrbanaIL 61801USA

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Jinyin Zhang Gustavo Sudre Xin Li Wei Wang Douglas J. Weber Anto Bagic Department of Electrical and Computer Engineering Carnegie Mellon University Program in Neural Computation (PNC) Center for the Neural Basis of Cognition Carnegie Mellon University Department of Physical Medicine & Rehabilitation and the Department of Bioengineering University of Pittsburgh Department of Neurology University of Pittsburgh

ISBN: (纸本)9781424441211

To investigate the neural activity corresponding to different cognitive states, it is of great importance to localize the cortical areas that are associated with task-related modulation. In this paper, we propose a novel discriminant pattern source localization (DPSL) method to analyze MEG data. Unlike most traditional source localization methods that aim to find "dominant" sources, DPSL is developed to capture the "differential" sources that distinguish different cognitive states. As will be demonstrated by the experimental results in this paper, the proposed DPSL method offers superior accuracy to identify the spatial locations of task-related sources.

关键词： Position measurement discriminant analysis Magnetoencephalography Localization method

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Implantable Biosensor Arrays Based On Smart Hydrogels And Piezoresistive Sensors For Continuous Metabolic Monitoring

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Procedia engineering 2011年 25卷 1008-1011页

作者： M. Avula P. Tathireddy S. Cho L. Rieth J.J. Magda F. Solzbacher Department of Bioengineering University of Utah Salt lake City Utah USA Department of Electrical and Computer Engineering University of Utah Salt lake City Utah USA Department of Chemical Engineering University of Utah Salt lake City Utah USA Department of Material Science and Engineering University of Utah Salt lake City Utah USA

In this paper, we present the results of continuous monitoring metabolic sensor arrays capable of monitoring changes in glucose, ionic strength and pH in the surrounding analyte continuously. Piezoresistive pressure sensors containing KOH etched cavities and pressure sensing membranes with and without perforations were fabricated in different sizes (1.5×1.5 mm2, 1.25×1.25 mm2, 1×1 mm2 and 0.5×0.5 mm2) to account for the sensitivities of the different types of hydrogels that were investigated. Figure 1 shows the schematic and the image of the sensors. Stimuli responsive hydrogels were used as the sensing elements to detect glucose and ionic strength in phosphate buffered saline at pH 7.4 and at room temperature. Response times of ∼10 and ∼6 minutes during swelling cycle and ∼5 and ∼4 minutes for the shrinking cycle were measured for glucose and ionic strength responsive hydrogels respectively.

关键词： Biosensors metabolic monitoring glucose sensors hydrogels

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