Results 251 to 260 of about 58,719 (283)

Scanning Tunneling Spectroscopy

2018
Spectroscopic measurement performed with STM, referred to as scanning tunneling spectroscopy (STS), provides information proportional to the local density of states (LDOS), the number of states per unit energy, of the sample surface. The STS measurement is usually made by positioning the STM tip over a target feature of a surface, deactivating the ...
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Scanning tunneling spectroscopy on Si

Ultramicroscopy, 1988
Abstract An overview is given of various methods for applying tunneling microscopy to obtain information on the electronic structure of surfaces. Results are presented for clean Si(111)7×7 and for a Si(111)7×7 surface on which 1 3 monolayer Ag was deposited.
H. Neddermeyer, St. Tosch
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Scanning tunneling microscopy and (scanning) tunneling spectroscopy on stepped Ni(111)/H

Surface Science, 1987
Topographic and electronic properties of both the (111) flat surface and atomic steps of nickel have been measured with scanning tunneling microscopy (STM) and (scanning) tunneling spectroscopy in UHV. Micrographs of the (111) plane show a hexagonal pattern with a dimension of two times the unit structure and a corrugation of 1 A which increases ...
G.F.A. van de Walle, H. Van Kempen, P. Wyder, C.J. Flipse   +3 more
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Scanning Tunneling Spectroscopy (STS)

2015
One of the fascinating potentials of scanning tunneling microscopy is its ability to obtain energy-resolved spectroscopic data with atomic resolution.
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Scanning Tunneling Spectroscopy of Single DNA Molecules

ACS Nano, 2009
We briefly present the results of recent experiments of transverse scanning tunneling spectroscopy of homogeneous poly(dG)-poly(dC) DNA molecules and discuss them in the light of theoretical investigation. A semiempirical theoretical model is adopted to describe the transverse tunneling current across a DNA molecule placed between a metallic gold ...
Ryndyk DA, Shapir E, Porath D, Calzolari A, Di Felice R, Cuniberti G   +5 more
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Spin-Polarized Scanning Tunneling Spectroscopy

2005
Within recent years spin-polarized scanning tunneling spectroscopy (SP-STS) has developed into a mature tool for ultrahigh spatial resolution magnetic domain imaging. In this chapter, we will introduce the measurement principle of SP-STS and describe experimental procedures and requirements. We will discuss present data measured on different ferro- and
M. Bode, R. Wiesendanger
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Scanning Tunneling Spectroscopy in an Ionic Liquid

Journal of the American Chemical Society, 2006
Molecular redox levels can be used to modulate tunneling currents through single or small numbers of molecules and induce molecular electronic device function. While most of these devices require cryogenic conditions, room temperature operation has been demonstrated by using electrochemical gating in aqueous environments.
Albrecht, T., Moth-Poulsen, Kasper, Christensen, Jørn Bolstad, Hjelm, J., Bjørnholm, Thomas, Ulstrup, J.   +5 more
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The scanning tunneling microscopy and scanning tunneling spectroscopy of amorphous carbon

Semiconductors, 2000
The most important methods for studying the surface of amorphous diamond-like carbon are scanning tunneling microscopy and scanning tunneling spectroscopy. In this review, publications concerned with studying the topography and electronic properties of the surface of amorphous diamond-like carbon films using a tunneling microscope are considered ...
V. I. Ivanov-Omskii, A. B. Lodygin, S. G. Yastrebov   +2 more
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Scanning tunneling spectroscopy of amorphous carbon: Tunneling model

Technical Physics Letters, 1999
An analysis is made of a model of tunnel current flow through amorphous diamond-like carbon. It is shown that single-electron phenomena may occur in this medium which result in the appearance of specific features on the current-voltage characteristics of thin amorphous carbon films. The model is used to explain the tunnel spectra of diamond-like carbon
V. I. Ivanov-Omskii, A. B. Lodygin, S. G. Yastrebov   +2 more
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Theory of scanning tunneling spectroscopy

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1988
A new three-dimensional tunneling theory is introduced for interpreting scanning tunneling spectroscopy (STS) images. By expanding the asymptotic wave function of the acting atom in terms of complete sets of eigenfunctions in spherical coordinates and parabolic coordinates, a derivative rule is derived, which can be applied to interpret scanning ...
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