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Wyświetlanie 1-15 z 29
Tytuł:
Surface Investigation by Scanning Tunnelling Microscopy in Liquid Medium
Autorzy:
Phaner, M.
Robach, Y.
de Villeneuve, C.
Wojczuk, S.
Olejniczak, W.
Porte, L.
Powiązania:
https://bibliotekanauki.pl/articles/1929313.pdf
Data publikacji:
1993-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
73.40.Gk
Opis:
Scanning tunneling microscopy in liquid environment has gained an increased interest in recent years. The specific features of the in situ observation of surface structures at the solid/liquid interface are first presented. Next, a high resolution imaging of high oriented pyrolytic graphite (HOPG) graphite surface shows the potentiality of our home-made microscope. The last study, performed on technological InP. substrates, illustrates the extensive applications of in situ imaging in the fields of semiconductor technology.
Źródło:
Acta Physica Polonica A; 1993, 83, 5; 611-619
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxidation Studies of the Graphite Surface by Scanning Tunneling Microscopy and Photoelectron Spectroscopy
Autorzy:
Klusek, Z.
Phaner, M.
Krapf, P.
Porte, L.
Powiązania:
https://bibliotekanauki.pl/articles/1931811.pdf
Data publikacji:
1994-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
33.60.Fy
Opis:
Scanning tunneling microscopy and spectroscopy and X-ray photoelectron spectroscopy were used to study oxidation effects of nitric acid on highly oriented pyrolytic graphite surface. This treatment was performed at different temperatures and etching times with the aim of realizing local binding sites on the surface without creating deep defects. Then these three technics were found in good agreement to characterize the weakly oxidized surface. A wavy structure different from pure graphite at atomic scale was imaged by scanning tunneling microscopy. This modification was correlated to the presence of carboxylic groups on the surface revealed by X-ray photoelectron spectroscopy. Both spectroscopies of scanning tunneling and X-ray photoelectron demonstrated the vanishing of π bands characteristic from sp$\text{}^{2}$ graphitic hybridization. This was attributed to dehybridization corresponding to new bondings of the graphite carbons in the carboxylic groups.
Źródło:
Acta Physica Polonica A; 1994, 86, 6; 947-954
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanostructuring and Hardness Investigations of Thin Films by Scanning Force Microscopy
Autorzy:
Nowicki, M.
Richter, A.
Ries, R.
Oszwałdowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1968828.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
68.35.-p
Opis:
The scanning force microscope was used to scratch thin films and to write nanoscale pattern on surfaces as well as to perform nanoindentation for hardness measurements. Different thin film materials such as C$\text{}_{60}$ films, diamond-like carbon, metals and semiconducting films have been investigated.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 437-441
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topographic and Energetic Heterogeneity Studies of Oxidized Graphite Surface by Scanning Tunneling Microscopy/Spectroscopy and Photoelectron Spectroscopy
Autorzy:
Klusek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1963284.pdf
Data publikacji:
1997-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
71.20.-b
Opis:
Scanning tunneling microscopy and spectroscopy and X-ray photoelectron spectroscopy are used to study oxidation effects of nitric acid on a highly-oriented pyrolytic graphite surface. Various etching times at constant temperature are applied in order to create local binding sites on the surface without creating deep defects. A single and paired chains structure, different from pure graphite at atomic scale, is shown by scanning tunneling microscopy. This can be explained by the presence of oxygenate groups on the surface, revealed by X-ray photoelectron spectroscopy. Both scanning tunneling spectroscopy and X-ray photoelectron spectroscopy demonstrate the vanishing of π bands characteristic of sp$\text{}^{2}$ graphite hybridization. This, in turn, can be explained by dehybridization related to new bondings of the graphite carbons in the oxygenate groups. An important result of area averaging spectroscopy is the observed energetic heterogeneity considered in terms of the changes of local electronic density of states of the oxidized surface.
Źródło:
Acta Physica Polonica A; 1997, 91, 3; 569-582
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Atomic and Electronic Structure of a Tip on Stm Images
Autorzy:
Jurczyszyn, L.
Mingo, N.
Flores, F.
Powiązania:
https://bibliotekanauki.pl/articles/1968715.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.79.Cz
61.16.Ch
Opis:
Theoretical studies of the influence of electronic and atomic structure of a tip on scanning tunneling microscopy images are presented. Results are discussed for the scanning of Al(001) and Al(001)+Xe surfaces performed within aluminum and nickel tips of a different geometry.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 307-315
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
STM/AFM Observations of Co/Cu Magnetic Multilayers
Autorzy:
Aleszkiewicz, M.
Kalinowski, R.
Czajka, R.
Polewska, W.
Wawro, A.
Baczewski, L. T.
Raułuszkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1955472.pdf
Data publikacji:
1997-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
68.65.+g
68.55.Jk
Opis:
UHV deposited magnetic Co/Cu multilayers were investigated by means of scanning tunneling microscopy (STM) and atomic force microscopy (AFM). Surface of the sample i.e. upper covering layer in "plane" configuration and individual sublayers in "cross-section" configuration were investigated. A possibility of structure characterization of metallic multilayers by STM and AFM in the cross-section configuration is demonstrated.
Źródło:
Acta Physica Polonica A; 1997, 91, 2; 311-314
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Improvement of Atomic Force Microscope Suitable for Magnetic Domain Structure Measurements
Autorzy:
Sveklo, I.
Dobrogowski, W.
Kisielewski, M.
Maziewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2013164.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
75.30.Pd
61.16.Ch
Opis:
Based on commercial Burleigh METRIS$\text{}^{TM}$-2000 Atomic Force Microscope two methods of magnetic force measurements were realised. The developed system was successfully applied for study of magnetic structure of both YIG-garnet and CoNi/Pt magneto-optic multilayers.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 527-530
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatially Resolved Chemistry on Bimetallic Surfaces
Autorzy:
Behm, R. J.
Powiązania:
https://bibliotekanauki.pl/articles/1968689.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
68.10.Jy
82.65.-i
Opis:
The local chemical properties of bimetallic surfaces, which are often drastically different from those of each of the components, will be discussed. Using CO adsorption as a probe molecule it will be shown for two model systems, Au/Pd(111) and Pt/Ru(0001), that their chemical properties depend decisively on the local surface structure and that the correct interpretation of area integrating spectroscopic and kinetic data obtained from such surfaces requires detailed knowledge of their (defect) structure and of the distribution of the different components in the surface layer. It will further be shown that information on the local chemical properties of specific structural elements such as monolayer islands and monolayer island edges, and specific surface ensembles can be gained by applying high resolution scanning tunneling microscopy imaging and area integrating spectroscopic techniques in combination to bimetallic surfaces whose morphology and composition is varied in a systematic and controlled way. Based on experimental results adsorption on a monolayer A / substrate B system is suggested as a model for gaining information on the modifications in chemical properties of AB alloy surfaces due to metal-metal interactions.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 259-272
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface State of Gd(0001) Films on W(110): Scanning Tunneling Spectroscopy Study
Autorzy:
Bode, M.
Pascal, R.
Getzlaff, M.
Wiesendanger, R.
Powiązania:
https://bibliotekanauki.pl/articles/1968692.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.At
68.55.Jk
61.16.Ch
Opis:
The surface electronic structure of Gd(0001)/W(110) has been studied by scanning tunneling spectroscopy in dependence of the coverage. An exchange split $d_{z^{2}}$-like surface state which is well known from photoemission experiments was already found for coverages as low as 2 ML. The exchange splitting was found to increase with increasing coverage up to the fourth ML. For higher coverages the electronic structure remains constant. We found spectra that are shifted by ≈ 25 meV, possibly due to stacking faults.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 273-280
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applications of Scanning Tunneling Microscopy To Solid State Physics
Autorzy:
van Kempen, H.
Boon, E. J. G.
van der Wielen, M. C. M. M.
Wildöer, J. W. G.
Prins, M.
Jansen, R.
Schad, R.
Powiązania:
https://bibliotekanauki.pl/articles/1968742.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
68.35.Dv
71.55.Eq
Opis:
Due to the dependence of the tunnel current to material properties like work function, density of states, and spin polarization the scanning tunneling microscope can be used to study a number of solid state physics problems. This will be illustrated with some examples. The presented examples have in common that also the role of the tip properties have to be taken explicitly into account.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 323-331
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
STM Studies of the Proximity Effect in Superconducting Wires with Artificial Pinning Centers
Autorzy:
Levi, Y.
Millo, O.
Rizzo, N. D.
Prober, D. E.
Motowidlo, L. R.
Powiązania:
https://bibliotekanauki.pl/articles/1968775.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.50.+r
73.40.Gk
61.16.Ch
Opis:
Scanning tunneling microscopy and spectroscopy were applied to study the proximity effect with nanometer spatial resolution. The measurements were conducted on novel superconducting wires, which consist of an ordered array of submicron diameter normal metal filaments (Cu, Ni) embedded in a superconducting (NbTi) matrix. Spatially resolved information about the local density of states is obtained by taking I-V curves simultaneously with topographic images. Our data provide direct evidence on the interplay between the normal and superconducting constituents in the vicinity of the interface between them.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 425-430
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
STM/AFM Images and Tunneling Spectra of Nd$\text{}_{2-x}$Ce$\text{}_{x}$CuO$\text{}_{4-y}$ Single Crystals
Autorzy:
Susła, B.
Sadowski, W.
Klimczuk, T.
Czajka, R.
Powiązania:
https://bibliotekanauki.pl/articles/1964375.pdf
Data publikacji:
1997-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
74.72.Jt
68.35.Bs
Opis:
The results of the scanning tunneling microscopy and spectroscopy as well as atomic force microscopy measurements on the Nd$\text{}_{2-x}$Ce$\text{}_{x}$CuO$\text{}_{4-y}$ single crystals in ambient conditions are reported. Using the scanning tunneling microscopy we were able to modify the Nd$\text{}_{2-x}$Ce$\text{}_{x}$CuO$\text{}_{4-y}$ ab-plane in air under the conditions of sample bias voltage V$\text{}_{t}$=500 mV and set current I$\text{}_{s}$=0.3 nA. It is possible to prepare atomically flat and clean surfaces as well as to create new structures in a nanometer scale in these electron-doped materials. The similar processes were not observed during atomic force microscopy imaging.
Źródło:
Acta Physica Polonica A; 1997, 92, 1; 209-214
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
STM Imaging of Magnetic Dots with Ferromagnetic Tip
Autorzy:
Wawro, A.
Kasuya, A.
Powiązania:
https://bibliotekanauki.pl/articles/2013217.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.80.Nz
36.40.Cg
61.16.Ch
Opis:
We report on imaging of isolated, few nanometers in size, magnetic dots (Co, Ni) by the use of a scanning tunneling microscope equipped with a ferromagnetic Co tip in the presence of external magnetic field. The dependence of apparent height of dots as a function of magnetic field takes a hysteresis-like shape. We discuss possible mechanisms of the scanning tunneling microscope tip interactions with dots.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 547-550
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scanning Tunneling Spectra and Low Energy Ion Scattering Studies of the Verwey Transition in MBE Fe$\text{}_{3}$O$\text{}_{4}$ (100) Thin Film
Autorzy:
Kim-Ngan, N.-T. H.
Soszka, W.
Hietschold, M.
Powiązania:
https://bibliotekanauki.pl/articles/2024029.pdf
Data publikacji:
2001-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
61.18.Bn
71.30.+h
Opis:
The (100) surface of magnetite Fe$\text{}_{3}$O$\text{}_{4}$ thin film was studied by a UHV low-temperature scanning tunneling microscope and by an ion scattering spectroscopy. The tunneling spectra revealed a widening of the gap with decreasing temperature, which may be related to the metal-insulator phase transition in this material. A strong effect of this phase transition on ion scattering from such a surface was observed. The temperature dependence of the scattered ion yield, R$\text{}^{+}$(T), revealed two minima at around 100 K and at 125 K under Ne$\text{}^{+}$ bombardment with the primary energy up to 6 keV. The disappearance of the high-temperature minimum at a bombarding energy of 6.5 keV gave a further evidence for the ion velocity dependence of the character of the R$\text{}^{+}$(T) curve, which has been first observed for a MBE Fe$\text{}_{3}$O$\text{}_{4}$ (111) film surface.
Źródło:
Acta Physica Polonica A; 2001, 99, 2; 267-276
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photostriction of CdF$\text{}_{2}$:In Crystals
Autorzy:
Suchocki, A.
Raułuszkiewicz, J.
Langer, J. M.
Koziarska-Glinka, B.
Powiązania:
https://bibliotekanauki.pl/articles/1968426.pdf
Data publikacji:
1997-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.16.Ch
61.72.Hh
74.62.Dh
Opis:
Lattice relaxation accompanying phototransformation of In bistable centers from the ground, deep state to the shallow state in CdF$\text{}_{2}$ crystal has been measured with the use of scanning tunnelling microscope. It is shown that relatively small macroscopic changes of the crystal length in the order of 1.8×10$\text{}^{-6}$ accompany the phototransformation of In ions. Lattice expansion upon the influence of population of shallow donor levels in CdF$\text{}_{2}$ explains the observed small changes of lattice constant during the process.
Źródło:
Acta Physica Polonica A; 1997, 92, 5; 1005-1008
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 29

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