Tags: nano/bio

Online Presentations (261-280 of 306)

  1. Nanoparticle Synthesis and Assembly for Biological Sensing

    25 Oct 2005 | | Contributor(s):: Gil Lee

    Nanoparticles have unique physical and chemical properties that make them very useful for biological and chemical sensing. For example, colloidal gold has been used as an optical transducer for antibody based sensing for over twenty years and is the basis for a many of the point-of-use...

  2. Nanostructure Engineered Sensors for Gas Detection in Space and Terrestrial Applications

    28 Jul 2005 |

    A nanosensor technology has been developed using single walled carbon nanotubes (SWNTs) on a pair of interdigitated electrodes (IDE) processed with a silicon-based microfabrication and micromachining technique. These sensors have been exposed to nitrogen dioxide, methane, acetone, benzene,...

  3. Top-Metal/Molecular Monolayer Interactions and Final Device Performance

    28 Jul 2005 | | Contributor(s):: Curt A Richter

    The top-metal/molecular-monolayer interface is of critical importance in the formation of molecular electronic (ME) devices and test structures. I will discuss two experimental studies of ME devices in which the final device performance can be attributed to top-metal/molecule interactions:...

  4. Organic Electronics Part II: Electric Field Modulation

    28 Jul 2005 |

    A solid state platform has been designed and fabricated that allows characterization of candidate organic semiconductor materials used in organic field-effect transistors (OFET). A systematic experimental protocol has been outlined that allows the separation of contribution of contact resistance...

  5. Novel Magnetic Materials for Biomolecular Diagnostics

    28 Jul 2005 | | Contributor(s):: Gil Lee, David Janes, Sugata Bhattacharya, Kyung Jae Jeong, ,

    Paramagnetic particles have emerged as important tools for cell sorting,protein separation, and single molecule measurements. The particles used inthese applications must meet the following requirements: uniform in size,highly paramagnetic, stable in physiological salt buffer, functionizable,and...

  6. Electrical Conduction through dsDNA-Molecule with Nanoscale Break Junctions

    28 Jul 2005 | | Contributor(s):: Ajit Kumar Mahapatro, Kyung Jae Jeong, Sugata Bhattacharya, Gil Lee, David Janes

    Measuring the electrical conductivity through a specific strand of DNA is of great interest to the nano-science and engineering community. This work focuses on the electrical conduction through 15 base-pair, double helix oligo-nucleotides with various sequences. The current-voltage...

  7. Basic Electronic Properties of DNA

    28 Jul 2005 | | Contributor(s):: M. P. Anantram

  8. DNA Charge Motion: Regimes and Behaviors

    28 Jul 2005 | | Contributor(s):: Mark Ratner

    Because DNA is a quasi-one-dimensional species, and because each base is a pi-type chromphore, it was long ago suggested that DNA could conduct electricity. This has become a widely investigated area, and remains of interest for fundamental science and for applications. We will discuss a very...

  9. Tuning of Electronic Properties of Organic Semiconductors...

    27 Jul 2005 |

    Intrinsic conducting polymers are key components in organic electronic devices. These materials are also known to be sensitive toward a variety of gases and vapors, which can be exploited by incorporation as chemical sensitive element in a nanoscale sensing system. The molecular interaction...

  10. Organic Electronics Part I: Chemical Modulation

    27 Jul 2005 |

    Organic semiconductors (OS) have been in the center of attention in at least two areas: in chemical ,sensors and in molecular electronics. Although the chemistry and physics governing them is the same their performance characteristics are apparently measured on different scales. Electrochemical...

  11. Nanofactories - In - Situ Production of Therapeutic Genes...

    27 Jul 2005 | | Contributor(s):: James Leary

  12. A New Terahertz Heterodyne Detector Based on Single-Walled Carbon Nanotubes

    27 Jul 2005 |

    We present non-invasive methods for improving the sensitivity of label-free biosensors that offer the advantage of rapid and real-time detection but suffer from relatively low sensitivity. We present detection of cancer markers using the Quartz Crystal Microbalance and demonstrate that 2...

  13. Sensitivity Amplification in Biosensors using Nanoparticles and Enzymatic Macromolecules

    27 Jul 2005 | | Contributor(s):: Cagri Savran

    We present non-invasive methods for improving the sensitivity of label-free biosensors that offer the advantage of rapid and real-time detection but suffer from relatively low sensitivity. We present detection of cancer markers using the Quartz Crystal Microbalance and demonstrate that 2...

  14. Fine Tuning Microcantilever Vibrations for Ultrasensitive Analyte Mass Detection

    27 Jul 2005 | | Contributor(s):: Arvind Raman

    Microcantilever based biochemical sensing has shown tremendous promise for ultrasenstive detection in both liquid and ambient conditions. However improving the sensitivity, reliability and robustness of these sensors so they can achieve their potential needs substantial efforts in (a) chemical...

  15. A Novel Diagnostic Assay Based On Nanomechanics

    28 Jul 2005 |

    Micro-fabricated silicon cantilevers arrays offer a novel label-free approach where ligand-receptor binding interactions occurring on the sensor generate nanomechanical signals like bending or a change in mass that is optically detected in-situ. We report the detection of multiple unlabelled...

  16. Introduction to BioMEMS and Bionanotechnology

    27 Jul 2005 | | Contributor(s):: Rashid Bashir

    BioMEMS and Bionanotechnology have the potential to make significant impact in a wide range of fields and applications. This lecture series introduces the basic concepts and topics underlying the interdisciplinary areas of BioMEMS and Bionanotechnology. Advances in this field require the...

  17. Sensing Technology Needs in Long-Term Human Space Exploration

    27 Jul 2005 |

    The sensing technologies are mainly derived from three broad areas, namely, absorbance, fluorescence and electrochemical. The development of a sensing system with unique requirements for space applications in these areas will be addressed. The application of these sensing systems in Tissue...

  18. Nanotechnology: Silicon Technology, Bio-molecules and Quantum Computing

    13 May 2005 |

    Nanotechnology: Silicon Technology, Bio-molecules and Quantum Computing

  19. Computer-Aided Analysis and Design of Bio-molecules

    10 Mar 2005 |

    Computer simulation of bio-molecules has become a valuable tool for the pharmaceutical industry, promising not only the potential to predict binding affinities for trial drugs, but also the ability to probe molecular interactions in ways that lab experiments cannot. This seminar will present one...

  20. Lecture 4: Sensing Methodologies (cont), Integrated BioMEMS and Nanodevices

    07 Feb 2005 | | Contributor(s):: Rashid Bashir