Ion scattering

Reviews on ion scattering spectroscopic techniques [220,221] are available for textbooks, cfr Bibliography. [Pg.443]

The application of ISS to polymeric materials is not extensive, mainly because competitive techniques such as SIMS offer a larger amount of information. A combined ISS/DSIMS study of glass polymer interfaces has shown that ISS provides lower resolution with respect to SIMS, because energies instead of masses are analysed [222]. [Pg.443]

Ion beam analysis techniques form a suite of mature and well-understood techniques with potential for polymer surface and interface problems. Due to the size of the polymer chains, in addition to pure surface analysis techniques, polymer surface and interface science needs techniques that can provide depth profile information in the near-surface region i.e. from 1-10 nm to 1 jxm depth). This information can be provided by He ion beam techniques with energies of about 1-3 MeV. In order to avoid surface damage under the ion beam, low-damage conditions need to be developed. [Pg.443]

The major areas of application of ion beam techniques to polymer surface and interface problems concern (i) segregation at polymer surfaces and interfaces (ii) polymer-polymer interfaces and diffusion and (Hi) transport of non-polymeric materials through thin polymer films. A prototypical case of the latter application is swelling of an amorphous polymer by a small molecule solvent. Kramer et al. [223,224] probed the diffusion front in swelling of PS, PMMA and other polymers by halo-genated solvents. Adhesion problems, glass/polymer interfaces, and polymer surfaces have been studied. [Pg.443]

Jones [225] has dealt with ion beam analysis of composition profiles near polymer surfaces. The application of ion beam analysis to polymer surfaces and interfaces has been reviewed [226]. [Pg.443]

ISS Ion scattering spectroscopy [153, 154] Inelastic backscattering of ions (-1 keV ion beam) Surface composition... [Pg.315]

LEIS Low-energy ion scattering [155-157] A monoenergetic beam of rare-gas ions is scattered elastically by surface atoms Surface composition... [Pg.315]

In many materials, the relaxations between the layers oscillate. For example, if the first-to-second layer spacing is reduced by a few percent, the second-to-third layer spacing would be increased, but by a smaller amount, as illustrated in figure Al,7,31b). These oscillatory relaxations have been measured with FEED [4, 5] and ion scattering [6, 7] to extend to at least the fifth atomic layer into the material. The oscillatory nature of the relaxations results from oscillations in the electron density perpendicular to the surface, which are called Eriedel oscillations [8]. The Eriedel oscillations arise from Eenni-Dirac statistics and impart oscillatory forces to the ion cores. [Pg.289]

Busch B W and Gustafsson T 1998 Oscillatory relaxation of Al(110) reinvestigated by using medium-energy ion scattering Surf. Set 415 LI 074... [Pg.316]

Fauster T 1988 Surface geometry determination by large-angle ion scattering Vacuum 28 129... [Pg.319]

It is important to recognize the approximations made here the electric field is supposed to be sulficiently small so that the equilibrium distribution of velocities of the ions is essentially undisturbed. We are also assuming that the we can use the relaxation approximation, and that the relaxation time r is independent of the ionic concentration and velocity. We shall see below that these approximations break down at higher ionic concentrations a primary reason for this is that ion-ion interactions begin to affect both x and F, as we shall see in more detail below. However, in very dilute solutions, the ion scattering will be dominated by solvent molecules, and in this limiting region A2.4.31 will be an adequate description. [Pg.571]

In tenns of individual techniques, table B1.2T1 lists tlie breakdown totalled over time, counting from the inception of surface stmctural detennination in the early 1970s. It is seen that LEED has contributed altogether about 67% of all stmctural detenninations included in the database. The annual share of LEED was 100% until 1978, and has generally remained over 50% since then. In 1979 other methods started to produce stmctural detenninations, especially PD, ion scattering (IS) and SEXAFS. XRD and then XSW started to contribute results in the period 1981-3. [Pg.1757]

In TOF-SARS [9], a low-keV, monoenergetic, mass-selected, pulsed noble gas ion beam is focused onto a sample surface. The velocity distributions of scattered and recoiled particles are measured by standard TOF methods. A chaimel electron multiplier is used to detect fast (>800 eV) neutrals and ions. This type of detector has a small acceptance solid angle. A fixed angle is used between the pulsed ion beam and detector directions with respect to the sample as shown in figure Bl.23.4. The sample has to be rotated to measure ion scattering... [Pg.1805]

Heiland W and Taglauer E 1975 Low energy ion scattering and Auger electron spectroscopy studies of clean nickel surfaces and adsorbed layers Surf. Sc/. 47 234-43... [Pg.1824]

Heiland W and Taglauer E 1973 Bombardment induced surface damage in a nickel single crystal observed by ion scattering and LEED Rad. Effects. 19 1-6... [Pg.1824]

Brongersma H H and Theeten J B 1976 The structure of oxygen adsorbed on Ni(OOOI) as determined by ion scattering spectroscopy Surf. Sc/. 54 519-24... [Pg.1824]

Brongersma H H and Mul P 1973 Analysis of the outermost atomic layer of a surface by low-energy ion scattering Surf. Sc/. 35 393-412... [Pg.1824]

Aono M, Hou Y, Souda R, Oshima C, Otani S, Ishizawa Y, Matsuda K and Shimizu R 1982 Interaction potential between He" and Ti in a keV range as revealed by a specialized technique in ion scattering spectroscopy Japan. J. Appl. Phys. Lett. 21 L670-2... [Pg.1825]

Aono M, Hou Y, Oshima C and Ishizawa Y 1982 Low-energy ion scattering from the Si(OOI) surface Phys. Rev. Lett. 49 567-70... [Pg.1825]

Niehus H and Comsa G 1984 Determination of surface reconstruction with impact-collision alkali ion scattering Surf. Sc/. 140 18-30... [Pg.1825]

Aono M, Katayama M and Nomura E 1992 Exploring surface structures by coaxial impact collision ion scattering spectroscopy (CAICISS) Nucl. Instrum. Methods B 64 29-37... [Pg.1825]

Ghrayeb R, Purushotham M, Hou M and Bauer E 1987 Estimate of repulsive interatomic pair potentials by low-energy alkalimetal-ion scattering and computer simulation Phys. Rev. B 36 7364-70... [Pg.1825]

Dodonoy A I, Mashkova E S and Molchanov V A 1989 Medium-energy ion scattering by solid surfaces. Ill ejection of fast recoil atoms from solids under ion bombardment Rad. Eff. Def Sol. 110 227-341... [Pg.1825]

Taglauer E, Beckschulte M, Margraf R and Mehl D 1988 Recent developments in the applications of ion scattering spectroscopy Nucl. Instrum. Methods B 35 404-9... [Pg.1825]

Bracco G, Canepa M, Catini P, Fossa F, Mattera L, Terreni S and Truffelli D 1992 Impact-collision ion scattering study of Ag(110) Surf. Sc/. 269/270 61-7... [Pg.1825]

Kim C, Hefner C and Rabalais J W 1997 Surface structure determination from ion scattering images Surf. Sc/. 388 LI 085-91... [Pg.1826]

Hofner C, Bykov V and Rabalais J W 1997 Three-dimensional focusing patterns of He" ions scattering from a Au 110 surface Surf. Sc/. 393 184-93... [Pg.1826]

Rabalais J W 1994 Low energy ion soattering and reooiling Surf. Sc/. 299/300 219-32 A review of the ion scattering literature starting in the 1960s. [Pg.1827]

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See also in sourсe #XX -- [ Pg.80 , Pg.98 , Pg.99 , Pg.100 , Pg.101 , Pg.102 , Pg.103 , Pg.104 , Pg.105 , Pg.106 , Pg.107 , Pg.108 ]

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See also in sourсe #XX -- [ Pg.269 ]

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