Tags: experiments

Resources (81-100 of 105)

  1. Making the Tiniest and Fastest Transistor using Atomic Layer Deposition (ALD)

    13 Feb 2006 | | Contributor(s):: peide ye

    Atomic layer deposition (ALD) is an emerging nanotechnology enables the deposit of ultrathin films, one atomic layer by one atomic layer. ALD provides a powerful, new capability to grow or regrow nanoscale ultrathin films of metals, semiconductors and insulators. This presentation introduces ALD...

  2. Designing Nanocomposite Materials for Solid-State Energy Conversion

    10 Nov 2005 |

    New materials will be necessary to break through today's performance envelopes for solid-state energy conversion devices ranging from LED-based solid-state white lamps to thermoelectric devices for solid-state refrigeration and electric power generation. The combination of recent materials...

  3. Molecular Beam Epitaxy

    16 Nov 2005 |

    Microelectronic devices are made by repeating two steps: 1) Depositing a thin uniform layer of material; 2) Then using a photographic process to pattern and remove unwanted areas of that layer.

  4. Scanning Electron Microscope

    16 Nov 2005 |

    This resource describes a scanning electron microscope (SEM). It includes detailed depictions of how the electron beam is focused and used to create hugely magnified images of experimental specimens.

  5. Scanning Probe Microscope Piezoelectric Crystals

    16 Nov 2005 |

    In this resource we disassemble the piezoelectric assembly of a scanning probe microscope. At its core is a white cylinder of the piezoelectric material. If you look closely, it has a granular texture that reflects the fact that it is actually made up of many small crystals.

  6. Scanning Probe Microscope Operation

    16 Nov 2005 |

    Scanning Probe Microscopes (SPMs) include Atomic Force Microscopes (AFMs) and Scanning Tunneling Microscopes (STMs or STEMs). They are the only instruments in widespread use that can actually "see" single atoms! You can skim this resource quickly to learn the general concepts of SPMs, or you can...

  7. Fabrication of a MOSFET within a Microprocessor

    16 Nov 2005 |

    This resource depicts the step-by-step process by which the transistors of an integrated circuit are made.

  8. Designing Nanocomposite Thermoelectric Materials

    08 Nov 2005 | | Contributor(s):: Timothy D. Sands

    This tutorial reviews recent strategies for designing high-ZT nanostructured materials, including superlattices, embedded quantum dots, and nanowire composites. The tutorial highlights the challenges inherent to coupled electronic and thermal transport properties.

  9. Laser Cooling of Solids

    06 Oct 2005 |

    Enhanced laser cooling of ion doped nanocrystalline powders (e.g., Yb3+: Y2O3) can be achieved by enhancing the anti-Stokes, off-resonance absorption, which is proportional to the three design-controlled factors, namely, dopant concentration, pumping field energy, and anti-Stokes transition...

  10. Semiconductor Interfaces at the Nanoscale

    17 Oct 2005 | | Contributor(s):: David Janes

    The trend in downscaling of electronic devices and the need to add functionalities such as sensing and nonvolatile memory to existing circuitry dictate that new approaches be developed for device structures and fabrication technologies. Various device technologies are being investigated,...

  11. Towards Molecular Electronic Circuitry: Selective Deposition of Metals on Patterned ...

    28 Jul 2005 |

    We have developed a robust method by which to construct complex two- and three- dimensional structures based on controlling interfacial chemistry. This work has important applications in molecular/organic electronics, sensing, and other technologies. Our method is extensible to many different...

  12. Synthetic and Processing Strategies to New Molecular and Polymeric...

    28 Jul 2005 | | Contributor(s):: ,

    Recent achievements in the design and synthesis of new arene/heteroaromatic oligomers/molecules functionalized with a variety of phenacyl, alkylcarbonyl, and perfluoroalkylcarbonyl will be presented. These organic semiconductors exhibit low-lying LUMOs allowing efficient electron...

  13. Probing Silicon-Based Molecular Electronics with Scanning Tunneling Microscopy

    29 Jul 2005 |

    In recent years, substantial progress has occurred in the field of molecular electronics [1]. In this paper, charge transport through molecule-semiconductor junctions is probed with ultra-high vacuum (UHV) scanning tunneling microscopy (STM). The presence of the semiconductor band gap enables...

  14. Measurement of Single Molecule Conductance using STM-Based Break Junctions

    28 Jul 2005 |

    We have measured single molecule conductance using a combined STM- and conducting AFM-based break junction method. The method works in aqueous solutions, which is suitable for biologically relevant molecules such as DNA and peptides, and also allows us to control electron transport through redox...

  15. Scanning Probe Microscopes

    15 Mar 2005 |

    Laura explains how scanning probe microscopes can be used to create images of small devices, molecules, and even atoms! A large-scale version of the scanning probe microscope is built out of Legos to show the basic principles.

  16. Nanomanufacturing: Top-Down and Bottom-Up

    14 Mar 2005 |

    Martin presents an overview of nanomanufacturing techniques, explaining the difference between top-down and bottom-up approaches.

  17. Probing Molecular Conduction with Scanning Probe Microscopy

    08 Jul 2004 |

    This tutorial will provide an overview of scanning probe microscopy (SPM) andits application towards problems in molecular conduction. In an effort to communicatethe power and limitations of these instruments, the tutorial will describe designconsiderations and reveal the detailed construction...

  18. Modification of Si(111) Surfaces using Self - Assembled Monolayers (SAMs) for Electrochemical and AF

    16 Aug 2004 |

    Recent researchers in the electrical engineering field are using self-assembled monolayers techniques with aryldiazonium salts solutions to build nanoelectronic devices. This innovation can explain the molecular conductivity and the chemical covalent bonds between π- conjugated orbitals of the...

  19. Efficient UDP Haptic Device Communication

    16 Aug 2004 | | Contributor(s):: Daniel Wilhelm

    The User Datagram Protocol (UDP) is a robust method for communicating with haptic devices across a Local Area Network (LAN), enabling fast Ethernet transmission and remote operation.

  20. Spectroscopic Studies of Dye-Metal Complexes

    15 Aug 2004 |

    In the previous works concerning metal-molecule interactions interesting properties of a new spectral band in luminescence were observed. It was also shown in previous works that Ag-dye complexes placed in a micro-cavity provide multiplicative enhancement for luminescence and Raman scattering.