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Tytuł:
Near Field Optical Microscopy and Spectroscopy with STM and AFM Probes
Autorzy:
Bergossi, O.
Bachelot, R.
Wioland, H.
Wurtz, G.
Laddada, R.
Adam, P. M.
Bijeon, J. L.
Royer, P.
Powiązania:
https://bibliotekanauki.pl/articles/1968764.pdf
Data publikacji:
1998-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.60.Pb
42.62.Fi
61.16.Ch
68.35.Bs
Opis:
This article deals with a new generation of scanning near field optical microscopes (SNOM), called apertureless SNOM, based on metallic, semi-conductive or dielectric probes. The classification of the apertureless probe among the usual SNOM probes is discussed in the first part. Then, we present the different apertureless SNOM configurations that we develop, with various commercial AFM and home-made tungsten tips, and several illumination and collection modes. Finally, after a preliminary result in near field imaging, we propose a promising application of such microscopes dedicated to the near field fluorescence spectroscopy.
Źródło:
Acta Physica Polonica A; 1998, 93, 2; 393-398
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time-Resolved and Near-Field Scanning Optical Microscopy Study on Porphyrin J-Aggregate
Autorzy:
Miura, A.
Matsumura, K.
Su, X.
Tamai, N.
Powiązania:
https://bibliotekanauki.pl/articles/1993153.pdf
Data publikacji:
1998-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.47.+p
Opis:
Water-soluble porphyrin, 5,10,15,20-tetraphenyl- 21H,23H-porphine-tetrasulfonic acid (TPPS), forms J-aggregate in aqueous solution depending on experimental conditions such as pH, dye concentration, and/or ionic strength. The steady-state fluorescence and picosecond single-photon timing spectroscopy were applied for protonated monomer and J-aggregate in aqueous solution and in thin films to reveal the dynamics in the S$\text{}_{2}$ and S$\text{}_{1}$ states. The S$\text{}_{2}$ fluorescence spectra from the protonated monomer and J-aggregate were observed in addition to the normal S$\text{}_{1}$ fluorescence. The lifetime of the S$\text{}_{2}$ state was estimated to be ≈5 ps for J-aggregate, whereas the lifetime is shorter than 1 ps for protonated TPPS monomer. The mesoscopic structures of J-aggregate in thin film with and without polymer on the glass surface were examined by scanning near-field optical microscopy. With the surface topography and scanning near-field optical microscopy transmission images, TPPS J-aggregate was found to form a long and narrow tube-like structure which has a few μm length, 0.2-0.5 μm width, and 5-30 nm height. An unidirectional orientation of the structure was also found, which may be originated from the spin-coating process.
Źródło:
Acta Physica Polonica A; 1998, 94, 5-6; 835-846
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the quality of titanium oxide and copper oxide layers by means of optical microscopy
Autorzy:
Głuszek, A.
Sawicka-Chudy, P.
Wisz, G.
Sibiński, M.
Cholewa, M.
Powiązania:
https://bibliotekanauki.pl/articles/101772.pdf
Data publikacji:
2018
Wydawca:
Instytut Polityki Energetycznej im. Ignacego Łukasiewicza
Tematy:
titanium oxide
copper oxide
optical microscopy
histograms
Opis:
The aim of this paper is to analyse high-resolution optical images of the surface layers of titanium oxide and copper oxide. The materials were produced using the PREVAC Modular Platform for layer deposition located at the University of Rzeszów. Images with a magnification of 50x were obtained using an optical microscope. On the basis of the results obtained, the quality of the layers was evaluated based on the image analysis. The quantitative method of analysis was applied, as a result of which the conditions of the manufacturing process for which the obtained layers had the highest homogeneity were indicated. The minimum range of grey shade counting was from 65 to 150 and the maximum range from 135 to 220. The standard deviation was from 8 to 40%.
Źródło:
Energy Policy Studies; 2018, 1 (2); 39-51
2545-0859
Pojawia się w:
Energy Policy Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simple model of the scanning near-field optical microscopy probe tip for electric field enhancement
Autorzy:
Wang, Y.
Cai, W.
Yang, M.
Liu, Z.
Shang, G.
Powiązania:
https://bibliotekanauki.pl/articles/174091.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
near-field tip
electromagnetic field enhancement
finite-difference time-domain
FDTD
Opis:
In this paper, we present a simple near-field probe model that is composed of an elongated ellipsoid and a finite metal truncated cone. The elongated ellipsoid has been shown to act as a protrusion or separate particle near a truncated cone apex with strong near-field enhancement under laser excitation. By controllably varying the length of the ellipsoid protrusion from the truncated cone, the truncated cone-ellipsoid probes can be adapted to the suitability of near-field probes. The effects of substrate material and excitation wavelength on the near field enhancement for different tip apexes are also discussed. In addition, we compared the properties of the truncated cone-ellipsoid probe with the widely used hemisphere conical tip by launching surface plasmon polaritons on plasmonic waveguides to prove the suitability of the truncated cone-ellipsoid probes as high performance near-field probes. The present simple model would provide a theoretical basis for the actual construction of probes.
Źródło:
Optica Applicata; 2017, 47, 1; 119-130
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical Assessment of the Microstructure of Barite Aggregate from Different Deposits Using X-Ray Microtomography and Optical Microscopy
Autorzy:
Żołek, N.
Ranachowski, Z.
Ranachowski, P.
Jóźwiak-Niedźwiedzka, D.
Kudela, S. jr.
Dvorak, T.
Powiązania:
https://bibliotekanauki.pl/articles/351890.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
barite ore
barite aggregate
microstructure
optical microscopy
thin sections analysis
X-ray tomography
Opis:
Two different barite ore (barium sulfate BaSO4) specimens from different localizations were tested and described in this paper. Analysis of the microstructure was performed on polished sections, and on thin sections using X-ray microtomography (micro-CT), and optical microscopy (MO). Microtomography allowed obtaining three-dimensional images of the barite aggregate specimens. In the tomograms, the spatial distribution of the other polluting phases, empty space as well as cracks, pores, and voids – that exceeded ten micrometers of diameter-were possible to visualize. Also, the micro-CT allowed distinguishing between minerals of different density, like SiO2 and BaSO4. Images obtained and analyzed on thin sections with various methods using the optical microscopy in transmitted light delivered additional information on the aggregate microstructure, i.e. allow for estimation of the different kinds of inclusions (like the different density of the minerals) in the investigated specimens. Above methods, which were used in the tests, completed each another in order to supply a set of information on inclusions’ distribution and to present the important differences of the barite aggregate specimens microstructure.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 697-702
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania mikroskopowe ureilitu NWA XXX
Microscopic Investigations of NWA XXX Ureilite
Autorzy:
Szurgot, Marian
Powiązania:
https://bibliotekanauki.pl/articles/1032789.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
extraterrestrial matter
meteorite
meteorites
optical microscopy
ureilite
Opis:
New NWA XXX ureilite found in 2006 was investigated by optical microscopy in reflection and in transmission. Olivines, pigeonite, metal veins and dots, and carbon phases have been revealed and their features and distribution studied. Twinning of pigeonite, reduction rims, and poikilitic inclusions of olivine in large pigeonite crystals have been identified and characterized. NWA XXX meteorite belongs to olivine-pigeonite ureilites.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2011, 2; 138-146
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of factors determinant of siliceous electrical porcelain resistance to structural degradation
Autorzy:
Ranachowski, P.
Ranachowski, Z.
Kudela Jr., S.
Pawełek, A.
Piątkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/351813.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
porcelain insulating materials
ageing processes
acoustic emission (AE)
optical microscopy
Opis:
The subject of this study was investigation of the factors that have a decisive influence on the resistance of siliceous porcelain to degradation processes. There was tested material C 110 type, which is widely used for the production of low-voltage (LV) elements such as insulators and bushings. On the basis of mechanical-acoustic and microscopic research of small-sized samples, which were subjected to compression, there were distinguished successive stages of degradation of the material structure. In the authors* opinion, they have a reference to the ageing process, taking place during many years of work under operating conditions. Thus, it was possible to assess the structural factors that determine the durability and reliability of LV electroinsulating elements. The results were related to electrical aluminous porcelains.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1489-1496
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moving-aperture-based three-dimensional micro-measurement system
Autorzy:
Fan, S.
Yu, M.
Jiang, G.
Wang, Y.
Wang, W.
Li, W.
Powiązania:
https://bibliotekanauki.pl/articles/174026.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
optical microscopy
computational photography
three-dimensional micro-measurement
moving aperture
Opis:
To overcome the depth-of-field limitation of an optical microscope image, a three-dimensional measurement method with a superior depth-of-field is proposed. In the proposed method, light-field information of different angles is obtained by moving the aperture and the three-dimensional scene is reconstructed by using a computational reconstruction technology. First, stereo matching of different aperture position images is performed to obtain the multi-aperture imaging deviation. The focal plane moving distance is thereby estimated. Then, the relational expression between the image coordinates and the focal plane moving distance is determined according to the image coordinates. Two dimensional coordinates of the space point are obtained by the expression coefficients. Finally, the depth coordinates are computed, and three-dimensional reconstruction of the spatial points is completed. Experiments of three-dimensional measurements of the calibration board with different angles and circuit boards are conducted. The results show that the maximum error of the distance measurement is controlled into 0.84%, and the maximum angle measurement error is controlled into 4.56%.
Źródło:
Optica Applicata; 2018, 48, 4; 533-547
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Modified Aluminous Porcelain Subjected to Mechanoacoustic Tests
Autorzy:
Ranachowski, P.
Ranachowski, Z.
Wieczorek, K.
Jaroszewski, M.
Kudela, S. jr.
Powiązania:
https://bibliotekanauki.pl/articles/355059.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electrical porcelain materials
ageing processes
acoustic emission
AE
optical microscopy
Opis:
The paper presents the microscopic and mechanoacoustic study of degradation processes of the porcelain material C 130 type. This kind of material is used in the production of the most durable and reliable electrotechnical elements. Raw material composition of the studied porcelain was modified. This had an impact on the inner properties, cohesion and – in consequence – on operational properties of the material. Using mechanical-acoustic and microscopic methods of testing of small-size samples that were subjected to compression, it was possible to distinguish successive stages of degradation of the porcelain structure. These stages were generally typical of the porcelain materials. In the authors’ opinion, they are connected to the ageing process happening over many years of work under operating conditions. Optimization of composition and technological properties – important during technological processes – resulted in a slight decrease in inner cohesion of the porcelain. When compared to the reference material – typical domestic C 130 material, mechanical strength was somewhat lower. Carried out investigations proved that resistance of the investigated material to the ageing degradation process – during long term operation – also decreased. The improvement of technological parameters and the reduction in the number of defective elements occurred simultaneously with some decrease in the operational parameters of the material. To restore their initial high level, further work is needed to optimize the raw material composition of the porcelain.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1821-1826
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrologiczna i mineralogiczna charakterystyka chondrytu węglistego NWA 4967
Petrological and mineralogical characteristics of NWA 4967 carbonaceous chondrite
Autorzy:
Szurgot, Marian
Powiązania:
https://bibliotekanauki.pl/articles/1033012.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
NWA 4967
chondrites
extraterrestrial minerals
meteorites
optical microscopy
petrographic thin sections
Opis:
NWA 4967 carbonaceous chondrite thin section was investigated by optical microscopes in transmission and in reflection. Minerals of the meteorite have been identified and microstructure analyzed. Chondrules, matrix, metal phases, AOAs and CAIs are constituents of the rock, as expected. Olivine, clinopyroxene, orthopyroxene, troilite, kamacite and feldspar have been detected. Various types of chondrules including: PO, POP, PP, RP, BO, C, GOP and GO chondrules were identified. Compositional zoning of some olivines, diagnostic cracks in pyroxenes, clinopyroxene twins, and chondrule rims have been observed and analyzed. Our previous EPMA and Raman data as well as present optical data confirm that NWA 4967 belongs to CO3.2 chondrites, as previously classified.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 121-148
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 36

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