Phonon-band engineering as a novel approach to modify frictional characteristics of mesoscopic solid materials

Hayashi, Keiji; Kanayama, T.; Kawakita, Seiji; Sunouchi, Syo; Takimoto, Mitsuhiro; Kawamura, Yasunori; Maeda, Akifumi

doi:10.1016/s0010-4655(01)00319-8

Cited by 11 publications

(2 citation statements)

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“…In order to further develop quantum functional devices and nano-electromechanical systems [ 1] it has become indispensable in recent years to ingeniously utilize selective surface reactions of neutral free radicals for the device processing. The problem encountered in the experimental study of a chemical reaction between a neutral free radical and a well-characterized material surface is how to supply a sufficient-flux purified beam of momentum-controlled neutral free radicals onto the surface.…”

Section: Introductionmentioning

confidence: 99%

“…In the PMMP method, the probe current as a function of the effective current I of the negative ion beam and the effective power P of the light beam from the CW laser is measured with a mobile cylindrical probe inserted beside the MPDI. The voltage V(t) = V0 + v0 sin(2ft) (1) applied to the probe was modulated at a low frequency f varied up to 20kHz so that the probe, which distinguishes electrons from negative ions by making use of the large difference between their masses, can collect electrons selectively. The detected probe current was processed using a lock-in amplifier to improve the SIN ratio by reducing the noise caused by fluctuation of the negative ion beam incident directly on the probe.…”

Section: Introductionmentioning

confidence: 99%

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How to sensitively measure the rate of neutral free radical production by photo-deionization of negative ion beams

et al. 2003

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Two measurement methods to determine the rate of neutral free radical production by the photo-deionization of negative ion beams ( PDINIB ) are introduced. These methods, namely, photoelectron-current measurement by low-frequency electro-modulation probe ( PMMP ) and measurement of decrease in the negative-ion beam current ( DNIC ) were employed to evaluate the production rate in a trial surface-processing apparatus developed in the author's laboratory utilizing a steady-flux refined beam of neutral free radicals produced by the PDINIB procedure. A 63Cu negative ion beam of kinetic energy E, varied up to 15 keY was irradiated with a 514.5 nm visible light beam from a 25 W CW Ar ion laser. The detection limit of the production rate by the PMMP setup was as high as 6x109 Is under the condition that E, = 15 keV, the negative ion beam current I = 4 j.tA, and the laser power P = 6 W. The DNIC method is simpler but less reliable than the PMMP method owing to larger uncertainty resulting from the fluctuation of the negative-ion beam current.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

How to sensitively measure the rate of neutral free radical production by photo-deionization of negative ion beams

et al. 2003

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Wie entsteht Reibung? Nanotribologie

Heuberger¹

2007

Physik in unserer Zeit

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Bei der Reibung zwischen gleitenden Oberflächen fließt die kinetische Energie des Gesamtsystems irreversibel in viele atomare und molekulare Kanäle. Die Mechanismen dieser vielfältigen Dissipationskanäle sind also nur auf der Nanometerskala zu verstehen. Dabei hängt das Verhalten der untersuchten Systeme von einer Vielzahl von Ereignissen ab, die sich über viele Größenordnungen auf der Längen‐ und Zeitskala ausdehnen. Das macht Reibung als Phänomen so schwer fassbar. Das junge Gebiet der Nanotribologie eröffnet dank hoch empfindlicher Messmethoden faszinierende Einblicke in die Energiedissipation auf der Nanometerskala. Seine Erkenntnisse führen zu Strategien, mit denen eines Tages eine “Superschmierung” technisch möglich wird.

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