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Nanotechnology

Nanometrology

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Displaying 851 - 866 of 866

Dispersion of Evanescent Band Gap States in Fe Clusters on GaAs(110)

January 1, 1990
Author(s)
Joseph Stroscio, P First, Robert A. Dragoset, L Whitman, Daniel T. Pierce, Robert Celotta
We report scanning tunneling microscopy results on the band gap states observed in tunneling to nanometer size metallic Fe clusters on GaAs(110) surfaces. In the vicinity of the Fe clusters, a continuum of gap states is found in tunneling spectra from

Scanning Tunneling Microscopy Study of InSb(110)

January 1, 1990
Author(s)
L Whitman, Joseph Stroscio, Robert A. Dragoset, Robert Celotta
The (110) cleavage surface of InSb has been studied with scanning tunneling microscopy. A variety of surface defects has been observed, including those that appear to be simple vacancies and Schottky defects. Atomic-resolution images have been obtained of

Characterization of Epitaxial Fe on GaAs(110) By Scanning Tunneling Microscopy

January 1, 1989
Author(s)
Robert A. Dragoset, P First, Joseph A. Stroscio, Daniel T. Pierce, Robert Celotta
Iron on GaAs(110) comprises an interesting system not only due to small lattice mismatch, 1.4%, but also because of the magnetic properties of the overlayer. In the present work, scanning tunneling microscopy (STM) was used to investigate bcc Fe films in

Metallicity and Gap States in Tunneling to Fe Clusters on GaAs(110)

January 1, 1989
Author(s)
P First, Joseph Stroscio, Robert A. Dragoset, Daniel T. Pierce, Robert Celotta
We report the characteristics of tunneling to a GaAs(110) substrate with distinct, nanometer-size Fe clusters, as a function of distance from and size of the clusters. We show that Fe clusters of volumes 150 Aring} 3, corresponding to =13 atoms, are

Structure of Cs on GaAs(110) as Determined by STM

January 1, 1989
Author(s)
P First, Robert A. Dragoset, Joseph Stroscio, Robert Celotta, R Feenstra
Submonolayer coverages of Cs adsorbed at room temperature on the GaAs(110) surface are examined with scanning tunneling microscopy. Linear chains, formed by two adjoining rows of Cs atoms, are observed along the [10] direction for coverages as low as 0.03

Chemisorbed Oxygen on Ni(110) Studied by Spin Polarized Inverse Photoemission

January 1, 1985
Author(s)
C Feigerle, A Seiler, J Pena, Robert Celotta, Daniel T. Pierce
Dissociative chemisorption of O2 on the surface on Ni(110) has been investigated by the techniques of AES, LEED, and spin polarized inverse photoemission spectroscopy (SPIPES). SPIPES provides a unique method for studying the empty electronic states of the

Determination of Sulfur and Sulfate Half-ester Content in Cellulose Nanocrystals: An Interlaboratory Comparison

Author(s)
Linda Johnston, Zygmun Jakubek, Stephanie Beck, Jun Arak, Emily Cranston, Christoph Danumah, Douglas Fox, Li Haifeng, Zoltan Mester, Audrey Moores, Savelas A. Rabb, Karen E. Murphy, Chady Stephan
Charged functional groups on the surface of cellulose nanocrystals (CNCs) are important for controlling the colloidal stability of suspensions and the interaction of the material with its environment for most applications. Quantification of surface groups
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