Temat: 81.07.Nb - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Synthesis and Characterization of Carbon Nanotubes Decorated with Gold Nanoparticles
Autorzy:: Dobrzanski, L.
Pawlyta, M.
Krzton, A.
Liszka, B.
Tai, C.
Kwasny, W.
Tematy:: 81.07.Nb; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1536456.pdf Link otwiera się w nowym oknie
Opis:: In presented work we report results of simple and viable method for producing Au/CNT composites. Chemical composition and crystallographic structure of the Au/CNT composites was confirmed by X-ray diffraction measurements, while transmission and scanning electron microscopy were used to characterize the morphology of nanocrystals as well as the distribution of nanocrystals in the composite. The obtained particles with relatively small diameter (less than 9 nm) were found to be spatially well dispersed on the carbon nanotubes. The density of attached Au-nanoparticles is not sufficient, and cannot be improved by simple increasing gold loading.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Nanostructure and Thermal Behaviour of Liquid Crystalline Oligoester
Autorzy:: Janicki, J.
Tematy:: 87.64.Bx
81.07.Nb
82.35.Lr; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2030698.pdf Link otwiera się w nowym oknie
Opis:: The nanostructure and thermal behaviour of liquid crystalline oligoester were examined by combination of real-time synchrotron small-angle and wide-angle X-ray scattering methods with differential scanning calorimetry. The synthesized oligoester exhibits ability to form a thermotropic mesophase. It was shown that solid crystalline state is observed in the temperature range 25 to 123ºC and liquid crystalline state between 118-156ºC. The transition temperature determined from dynamic small-angle and wide-angle X-ray scattering experiments agrees very well with the results obtained from differential scanning calorimetry.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of Ferritin Desorption from Gold Initiated by In Situ pH-Change
Autorzy:: Poór, V.
Kasyutich, O.
Hallam, K.
Schwarzacher, W.
Tematy:: 81.07.Nb
87.14.E-
87.15.R-; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1539084.pdf Link otwiera się w nowym oknie
Opis:: One of the main questions regarding protein adsorption is about the reversibility of the adsorption process. To get a deeper understanding of this, adsorption of ferritin on Au was studied by quartz crystal microbalance and the pH of the buffer was changed in situ between two values that favour adsorption by different amounts. We found that although some ferritin desorbs from Au, the desorption is incomplete. When the desorption reached a constant value, we returned to the original conditions and investigated the readsorption. Our experiments show that the adsorption of ferritin onto Au is a partly reversible process. We found that for different initial ferritin coverages the proportion of ferritin that had been subsequently desorbed was approximately constant.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Statistical Investigation of Current-Voltage Characterization in Single Molecule-Metal Junctions
Autorzy:: Kirchner, T.
Briechle, B.
Scheer, E.
Wolf, J.
Huhn, T.
Erbe, A
Tematy:: 73.23.-b
73.63.Rt
81.07.Nb; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1490078.pdf Link otwiera się w nowym oknie
Opis:: We show statistical measurements of single molecule-metal contacts using the mechanically controllable break junction technique. The measurements are carried out in a solvent, in order to allow in situ binding of the molecules to the metallic contacts during the measurements. Statistics is gathered by opening and closing the junctions repeatedly and recording current-voltage characteristics at various stages of the opening and closing curves. By modeling the data with a single level model we can extract parameters such as the position of the molecular energy level, which carries the current, and the coupling between the metal and the molecule. In first experiments we use this method to characterize different anchoring groups, which mediate the mechanical and electrical coupling between the metallic electrodes and the molecules. We use tolane molecules, which are structurally simple, as model systems for this purpose.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Modelling of SubPc Self-Assembly on Ag(111)
Autorzy:: Petrauskas, V.
Tornau, E.
Lapinskas, S.
Tematy:: 64.60.Cn
68.43.Hn
79.60.Dp
81.07.Nb; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1178746.pdf Link otwiera się w nowym oknie
Opis:: The ordering of subphthalocyanine molecules into honeycomb and hexagonal close packed patterns on Ag(111) is described using complex Lennard-Jones-type intermolecular potential. We rescale Ag(111) lattice, and take into account an infinite exclusion of first, second, and third neighbours, attraction - of fourth and fifth, and repulsion - of sixth and seventh. The phase diagram is obtained by the lattice gas model using Monte Carlo simulations. Very strong first order phase transitions, causing the two-phase co-existence, are found between disordered and honeycomb as well as between disordered and hexagonal closed packed phases.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 6.

Tytuł:: Consequences of Confinement Conditions on Absorption in Molecular Nanofilms
Autorzy:: Šetrajčić, I.
Rodić, D.
Šetrajčić, J.
Šetrajčić-Tomić, A.
Vučenović, S.
Tematy:: 71.35.-y
71.35.Aa
77.22.Ch
77.55.-g
78.20.Bh
78.68.+m
81.07.Nb; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1030578.pdf Link otwiera się w nowym oknie
Opis:: This paper presents a model of molecular ultrathin crystalline film and analysis of dielectric properties of these spatially very restricted structures. Using the two-time dependent Green functions the energy spectrum and possible exciton states were determined and the dynamic permittivity was calculated. It was shown that the appearance of localized states in the boundary layers of the film depend on the thickness and the changing values of parameters in the border areas of the film. These localized states define schedule and determine the number of resonant absorption lines in the infrared area of the external electromagnetic radiation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Investigation of PCM Microcapsules with Paraffin Filling by Positron Lifetime Spectroscopy
Autorzy:: Zgardzińska, B.
Tematy:: 78.70.Bj
62.23.Pq
61.80.Fe
61.72.-y
61.46.-w
81.07.Nb
64.70.Nd
82.35.Pq; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1402636.pdf Link otwiera się w nowym oknie
Opis:: Positron annihilation lifetime spectroscopy was applied to investigate the microcapsules composed of n-eicosane (filling material) and polysiloxane polymer (shell) in the range of temperatures 123-333 K. Pure components of microcapsules were also investigated as a base for interpretation of the measurement results. The temperature of phase transitions in microcapsules was determined. It showed the appearance of a rotary phase, which is not present in pure n-eicosane. In the considered material, two types of free volume have been identified. The sizes of free volumes able to accommodate Ps were estimated using standard models. On the basis of the o-Ps intensities, the content of polysiloxane in microcapsules was estimated as about 40%. Internal structure of the microcapsules (morphology) was observed by scanning electron microscopy.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Application of Statistical Image Analysis in Quantification of Neutron Radiography Images of Drying
Autorzy:: Fijał-Kirejczyk, I.
Milczarek, J.
Żołądek-Nowak, J.
de Beer, F.
Radebe, M.
Nothnagel, G.
Tematy:: 87.59.bf
07.05.Pj
61.05.Tv
81.05.Rm
47.56.+r
47.55.nb; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1419614.pdf Link otwiera się w nowym oknie
Opis:: The statistical approach to the thermal neutron radiography picture analysis is applied to evaluation of the experimental results obtained for drying of rectangular and cylindrical samples of granulated and rigid porous materials. We have shown that the time dependence of the standard deviation of image brightness reflects the appearance and motion of the drying front observed during second period of the drying process. The results are discussed within a simple two-region model of the drying sample image.
Dostawca treści:: Biblioteka Nauki

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