Optical spectroscopy of a surface at the nanometer scale: A theoretical study in real space

ABSTRACTWe have imaged fractured cross-sections of electrodeposited ceramic oxides based on the TI-Pb-O system using a scanning tunneling microscope. The goal of this work is to measure both the modulation wavelength and compositional profile of the superlattices by mapping out the electronic properties in real space on a nanometer scale. Fourier analysis was done on STM images of all superlattices to yield the modulation wavelength. The modulation wavelength from STM was then compared with those obtained, by Faraday calculation and x-ray diffraction. The STM can be used to design “better” superlattices. We have found that the composition profile in superlattices deposited by modulating the potential was more square than in superlattices deposited by modulating the current.

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Effects of Nanoscale Voids on the Sensitivity of Model Energetic Materials

MRS Proceedings ◽

10.1557/proc-418-277 ◽

1995 ◽

Vol 418 ◽

Cited By ~ 7

Author(s):

C. T Whitea ◽

J. J. C. Barretta ◽

J. W. Mintmirea ◽

M. L. Elert ◽

D. H. Robertson

Keyword(s):

Shock Wave ◽

Molecular Dynamics ◽

Hot Spots ◽

Energetic Materials ◽

Theoretical Study ◽

Atomic Scale ◽

Nanometer Scale ◽

Higher Temperature ◽

Detonation Transition ◽

Dynamics Simulations

AbstractBecause of its importance in designing safer, more reliable explosives the shock to detonation transition in condensed phase energetic materials has long been a subject of experimental and theoretical study. This transition is thought to involve local hot-spots which represent regions in the material which couple efficiently to the shock wave leading to a locally higher temperature and ultimately initiation. However, how at the atomic scale energy is transferred from the shock front into these local “hot spots” remains a key question to be answered in studies of the predetonation process. In this paper we report results of molecular dynamics simulations that suggest that even nanometer scale defects can play an important role in the shock to detonation transition.

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Combining electronic and optical spectroscopy at the nanometer scale in a STEM

EMC 2008 14th European Microscopy Congress 1–5 September 2008, Aachen, Germany ◽

10.1007/978-3-540-85156-1_176 ◽

2009 ◽

pp. 351-352

Author(s):

S. Mazzucco ◽

R. Bernard ◽

M. Kociak ◽

O. Stéphan ◽

M. Tencé ◽

...

Keyword(s):

Optical Spectroscopy ◽

Nanometer Scale

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Pore Conductivity Control at the Hundred-Nanometer Scale: An Experimental and Theoretical Study

Small ◽

10.1002/smll.200600263 ◽

2006 ◽

Vol 2 (12) ◽

pp. 1504-1510 ◽

Cited By ~ 12

Author(s):

Sonia E. Létant ◽

Charlene M. Schaldach ◽

Mackenzie R. Johnson ◽

April Sawvel ◽

William L. Bourcier ◽

...

Keyword(s):

Theoretical Study ◽

Nanometer Scale

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Real-space Characterization of Nanometer-scale Structures by Tunneling-electron Luminescence Microscopy Using Tip Collection.

Hyomen Kagaku ◽

10.1380/jsssj.19.28 ◽

1998 ◽

Vol 19 (1) ◽

pp. 28-34

Author(s):

Tooru MURASHITA

Keyword(s):

Real Space ◽

Nanometer Scale ◽

Luminescence Microscopy ◽

Tunneling Electron ◽

Scale Structures ◽

Space Characterization

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Theoretical Study of the Magnetic Anisotropy of Ni Films on Cu(001)

MRS Proceedings ◽

10.1557/proc-475-507 ◽

1997 ◽

Vol 475 ◽

Author(s):

M. Freyss ◽

R. Lorenz ◽

H. Dreysse ◽

J. Hafner

Keyword(s):

Magnetic Anisotropy ◽

Theoretical Study ◽

Magnetic Moments ◽

Tight Binding ◽

Real Space ◽

Spin Orbit Coupling ◽

Magnetization Direction ◽

Out Of Plane ◽

Lmto Method ◽

The Stability

ABSTRACTThe anisotropy properties of Ni films on Cu(001) are quite unusual compared to other systems: The magnetization direction of Ni is in-plane for a coverage smaller than a critical thickness of 7 monolayers and out-of-plane for a coverage larger than 7 monolayers. As a first step in the study of this unusual behaviour, we report results of ab-initio calculations of the magnetic order of Ni films on a Cu(001) substrate. The magnetic moments are computed by means of the real-space Tight-Binding LMTO method allowing non-collinear magnetic moments and including spin-orbit coupling to account for magnetic anisotropy effects. As the number of Ni layers is increased, we discuss the stability of the system with a magnetization in-plane or out-of-plane.

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Nanocrystals and nano-optics

Philosophical Transactions of the Royal Society of London Series A Physical and Engineering Sciences ◽

10.1098/rsta.1995.0102 ◽

1995 ◽

Vol 353 (1703) ◽

pp. 313-321 ◽

Cited By ~ 25

Keyword(s):

Optical Spectroscopy ◽

Quantum Confinement ◽

Near Field ◽

Science And Technology ◽

Semiconductor Nanocrystals ◽

Single Molecules ◽

Three Dimensional ◽

Nanometer Scale ◽

New Science

Three dimensional electronic quantum confinement in semiconductor nanocrystals, and near-field optical spectroscopy of single molecules, are briefly discussed as examples of new science and technology at the nanometer scale.

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