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Nanotechnology

Nanometrology

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Displaying 826 - 850 of 866

Influence of Secondary Tip Shape on Illumination-Mode Near-Field Scanning Optical Microscopy Images

August 1, 1999
Author(s)
Lee J. Richter, C E. Dentinger, Richard R. Cavanagh, Garnett W. Bryant, A Liu, Stephan J. Stranick, C D. Keating, M J. Natan
We report illumination-mode near-field optical microscopy images of individual 80-115 nm diameter Au particles recorded with metal-coated fiber probes. It is found that the images are strongly influenced by the metal-coating thickness. This dependence is

Polarized Light Emission from the Metal-Metal STM Junction

January 1, 1998
Author(s)
Daniel T. Pierce, Angela Davies, Joseph A. Stroscio, Robert Celotta
The polarization of light emitted during inelastic tunneling of electrons into both Au(111) and Fe(001) using W(111) tips in an STM junction has been fully characterized by measuring the Stokes parameters. The emitted light for both Au(111) and Fe(001) is

Observations of Alloying in the Growth of Cr on Fe(001)

January 1, 1997
Author(s)
Angela Davies, Joseph A. Stroscio, Daniel T. Pierce, John Unguris, Robert Celotta
Using scanning tunneling microscopy, we observe the alloying of Cr with an Fe(001) substrate for various coverages at two temperatures. At low Cr coverage, the alloy consists of individual Cr impurities surrounded by Fe. Elemental identification is

Atomic-scale Observations of Alloying at the Cr-Fe(001) Interface

January 1, 1996
Author(s)
Angela Davies, Joseph A. Stroscio, Daniel T. Pierce, Robert Celotta
While much progress has been made using epitaxial growth of Fe/Cr/Fe structures to study magnetic exchange coupling, a number of anomalies have arisen in studies of this model system. Using scanning tunneling microscopy and spectroscopy to investigate Cr

Coarsening of Unstable Surface Features During Fe(001) Homoepitaxy

January 1, 1995
Author(s)
Joseph A. Stroscio, Daniel T. Pierce, Mark D. Stiles, A Zangwill, L Sander
The evolution of the surface profile during homoepitaxial growth of Fe(001) is studied by scanning tunnelling microscopy and reflection high energy electron diffraction. The observed morphology exhibits a non-self affine collection of mound-like features

Tunneling Spectroscopy of bcc(001) Surface States

January 1, 1995
Author(s)
Joseph Stroscio, Daniel T. Pierce, Angela Davies, Robert Celotta
We have discovered an intense, sharp feature in tunneling spectra of the Fe(001) and Cr(001) surfaces that derives from a bce surface state near the Fermi level. Band-structure calculations show that this state is a general feature of bcc (001) surfaces

Scaling of Diffusion-Mediated Island Growth in Iron on Iron Homoepitaxy

January 1, 1994
Author(s)
Joseph Stroscio, Daniel T. Pierce
An analysis of the island size and separation distributions of Fe islands, observed in the initial stages of growth in the homoepitaxy of Fe on Fe(001) whiskers, shows scaling properties recently predicted in nucleation and growth theories. A critical size

The Growth of Iron on Iron Whiskers

January 1, 1994
Author(s)
Joseph Stroscio, Daniel T. Pierce
Real space views of the homoepitaxial growth of Fe on Fe(001) whiskers is reported, observed by scanning tunneling microscopy (STM), during the initial stages of growth. Scaling of the Fe island sizes and separation distributions are observed as a function

Atomic Manipulation of Polarizable Atoms by Electric Field Directional Diffusion

January 1, 1992
Author(s)
Joseph Stroscio, L Whitman, Robert A. Dragoset, Robert Celotta
We present a brief summary of the properties of alkali metals on III-V(110) surfaces, as studied with the scanning tunneling microscope (STM). These include the non-metallic properties found in the one- and two-dimensional phases, and the directional

Microscopic Aspects of the Initial Growth of Metastable fcc Iron on the Au(111)

January 1, 1992
Author(s)
Joseph A. Stroscio, Daniel T. Pierce, Robert A. Dragoset, P First
We report on the microscopic aspects of the growth of Fe on the Au(111) surface observed with scanning tunneling microscopy. Nucleation of triangular Fe islands is observed to occur at the corners of the herringbone reconstruction of the Au(111) surface

A Scanning Tunneling Microscopy Study of Clean and Cs-Covered InSb(110)

January 1, 1991
Author(s)
L Whitman, Joseph Stroscio, Robert A. Dragoset, Robert Celotta
AB Scanning tunneling microscopy has been employed to study clean and Cs-covered InSb(110) surfaces. Atomic-resolution images of both the filled and empty electronic state densities have been obtained. The surface relaxation determined from these images is

A System for the Study of Magnetic Materials and Magnetic Imaging with the STM

January 1, 1991
Author(s)
P First, Joseph Stroscio, Daniel T. Pierce, Robert A. Dragoset, Robert Celotta
A report of work in progress to determine the feasibility of imaging the magnetization of ferromagnetic samples with the scanning tunneling microscope (STM) is presented. A vacuum system was designed to test several different proposals as well as to

Atomic and Molecular Manipulation With the Scanning Tunneling Microscope

January 1, 1991
Author(s)
Joseph Stroscio, D Eigler
The prospect of manipulating matter on the atomic scale has fascinated scientists for decades. This fascination may be motivated by scientific and technological opportunities, or from a curiosity about the consequences of being able to place atoms in a

Insulating Cs Overlayer on InSb(110)

January 1, 1991
Author(s)
L Whitman, Joseph Stroscio, Robert A. Dragoset, Robert Celotta
Cesium overlayers on room-temperature InSb(110) have been studied with scanning tunneling microscopy and spectroscopy. A two-dimensional (2D) overlayer is observed, consisting of four-atom, Cs(110)-like planar clusters arranged in a c(2 x 6) superlattice
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