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Tytuł:
Photoelectromagnetic Investigations of Graphene
Autorzy:
Nowak, M.
Solecka, B.
Jesionek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1376055.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.80.Vp
73.50.Gr
73.50.Pz
78.67.Wj
Opis:
The photoelectromagnetic investigations of graphene has been performed using noncontact technique. The dependence of photoelectromagnetic response on magnetic field induction, illumination intensity for different photon energies, and frequency of illumination chopping is presented. We anticipate our paper to be a starting point for investigations of carrier diffusion length in this material. Such investigations should be essential for development of graphene electronic and optoelectronic devices.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1104-1106
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical Properties of SbSI/Sb_2S_3 Single and Double Heterostructures
Autorzy:
Toroń, B.
Nowak, M.
Grabowski, A.
Kępińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1399098.pdf
Data publikacji:
2013-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.78.Fk
79.60.Jv
73.40.-c
78.66.-w
Opis:
The $SbSI//Sb_2S_3$ single heterostructures as well as $Sb_2S_3//SbSI//Sb_2S_3$ and $SbSI//Sb_2S_3/SbSI$ double heterostructures have been produced by applying $CO_2$ laser treatment of p-type SbSI single crystals. The current-voltage and transient characteristics of these heterostructures have been measured in temperatures below and above the SbSI single crystal Curie temperature $(T_{c} = 293 K)$. The results have been fitted with appropriate theoretical formulae to determine the following types of the investigated heterojunctions: P-p $SbSI//Sb_2S_3$, p-P-p $Sb_2S_3//SbSI//Sb_2S_3$ and P-p-P $SbSI//Sb_2S_3//SbSI$. Influence of the illumination on electrical properties of $SbSI//Sb_2S_3$ single and double heterostructures has been reported. Fabricated new structures may be potentially applicable in electronics and optoelectronics as a new type of metal-ferroelectric-semiconductor devices.
Źródło:
Acta Physica Polonica A; 2013, 124, 5; 830-832
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Electronic and Electrochemical Properties of the $LaNi_5$-Based Alloys
Autorzy:
Szajek, A.
Jezierski, A.
Nowak, M.
Jurczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1810498.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
81.20.Ev
Opis:
Mechanical alloying was used to synthesize $LaNi_5$-type hydrogen storage materials. X-ray diffraction analysis showed that, after 30 h milling, the starting mixture of the elements was decomposed into an amorphous phase. Following the annealing in high purity argon at 700°C for 0.5 h, X-ray diffraction confirmed the formation of the $CaCu_5$-type structures. The nanocrystalline materials were used as negative electrodes for a $Ni-MH_x$ battery. A partial substitution o Ni by Al or Mn in $LaNi_{5-x}M_x$ alloy leads to an increase in discharge capacity. On the other hand, the alloying elements such as Al, Mn and Co greatly improved the cycle life of $LaNi_5$ material. For example, in the nanocrystalline $LaNi_{3.75}Mn_{0.75}Al_{0.25}Co_{0.25}$ powder, discharge capacities of up to 258 mA h $g^{-1}$ (at 40 mA $g^{-1}$ discharge current) were measured. The band structure ab initio calculations showed that 3g sites are preferred by Al, Co, and Mn atoms in the unit cell.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 247-250
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Dependences of Optical Energy Gaps of SbSI@CNT and SbSeI@CNT
Autorzy:
Jesionek, M.
Nowak, M.
Kępińska, M.
Bednarczyk, I.
Powiązania:
https://bibliotekanauki.pl/articles/1399102.pdf
Data publikacji:
2013-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.67.Ch
62.23.Hj
78.67.Uh
81.07.Gf
Opis:
This paper presents for the first time temperature dependences of optical energy gaps of SbSI@CNT and SbSeI@CNT, i.e. carbon nanotubes (CNTs) filled with antimony sulfoiodide (SbSI) and antimony selenoiodide (SbSeI). The heterostructures were prepared sonochemically using CNTs and elemental Sb, S or Se and I in the presence of solvent under ultrasonic irradiation. Spectral characteristics of diffusive transmittance and reflectance of SbSI@CNT and SbSeI@CNT were measured in temperature range 274 K < T < 333 K. The determinal temperature dependence of indirect forbidden optical energy gap of SbSI@CNT has been fitted with $E_\text{gIf} (T) = (1.92(2)-3.6(6) \times 10^{-4} \times T) eV$. Indirect allowed optical energy gap of SbSeI@CNT has been fitted with $E_\text{gIa} (T) = (1.817(5)-7.1(2) \times 10^{-4} × T) eV$.
Źródło:
Acta Physica Polonica A; 2013, 124, 5; 836-837
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mobility of Ferroelectric Domains in Antimony Sulfoiodide
Autorzy:
Toroń, B.
Nowak, M.
Kępińska, M.
Szperlich, P.
Powiązania:
https://bibliotekanauki.pl/articles/1376000.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.80.-e
77.80.Dj
77.80.B-
81.05.Hd
Opis:
Different optical energy gaps in ferroelectric and paraelectric phases as well as light scattering on domain walls allow to observe ferroelectric domains in antimony sulfoiodide (SbSI) near the Curie temperature. Mobility 8.11(44)× $10^{-8}$ $m^2$/(Vs) of ferroelectric domain walls under external electric field has been determined along c-axis of SbSI single crystals using optical transmittance microscopy.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1093-1095
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric Properties of SbSI in the Temperature Range of 292-475 K
Autorzy:
Starczewska, A.
Solecka, B.
Nowak, M.
Szperlich, P.
Powiązania:
https://bibliotekanauki.pl/articles/1376063.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.80.Bg
78.40.Fy
Opis:
Methodology of impedance measurements and ferroelectric hysteresis loops observed in temperature range 292-475 K for antimony sulfoiodide (SbSI) grown from vapour phase are discussed. Temperature dependences of spontaneous polarization and coercive field of SbSI crystals are presented.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1125-1127
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the Thermoluminescence of CVD Diamond
Autorzy:
Karczmarska, A.
Mitura-Nowak, M.
Nowak, T.
Marszałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1490194.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.10.Bk
81.05.ug
78.60.Kn
Opis:
This work reports some thermoluminescent properties of chemical vapour deposition diamond film grown by 5 kW microwave assisted plasma chemical vapour deposition. The 2" diamond sample with the thickness of 32 μm was exposed to gamma radiation in the dose range 0.6-55 Gy. The thermoluminescent glow curve of diamond sample displayed a peak with the maximum centered at 240°C. The linearity of the detector response in the range of 10-55 Gy was observed. The bleaching effect, seen as fading of the thermoluminescent signal when the device was exposed to light in the visible range, was also noticed. Two-dimensional dose distribution was measured using 2D thermoluminescent reader equipped with a sensitive 640 × 480 pixels charge coupled device camera. The surface morphology of the diamond film was observed with scanning electron microscope and atomic force microscope. The grain size was estimated as about 15 μm. The Raman spectroscopy was used to characterize phase purity. The width and position of the diamond Raman band around 1332 $cm^{-1}$ indicated that the coating is crystalline and of good quality. It is concluded that good quality chemical vapour deposition diamond coating could be promising material for thermoluminescent dosimetry.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 510-513
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SbSI Single Nanowires as Humidity Sensors
Autorzy:
Mistewicz, K.
Nowak, M.
Szperlich, P.
Jesionek, M.
Paszkiewicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/1376060.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.07.Df
92.60.Jq
73.50.Pz
81.07.Gf
Opis:
For the first time influence of humidity on photoconductivity transient characteristics are studied for antimony sulfoiodide (SbSI) single nanowires. While negative photoconductivity is observed for SbSI gel, made up of large quantity of nanowires, only the positive effect occurs for SbSI single nanowires. Photoconductivity current response on switching on and off illumination in moist $N_{2}$ represents so-called hook anomaly.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1113-1114
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Properties of SbSI Photonic Crystals
Autorzy:
Kępińska, M.
Starczewska, A.
Duka, P.
Nowak, M.
Szperlich, P.
Powiązania:
https://bibliotekanauki.pl/articles/1376061.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.67.Pt
77.84.Lf
42.70.Qs
42.25.Gy
Opis:
This paper presents optical properties of $SiO_2$ opals infiltrated with SbSI and inverted SbSI opals for the first time. Registered reflectance spectra exhibit Bragg's peaks connected with photonic band gap. Calculated photonic band structure has been compared with experimental results.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1115-1117
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Desorption of Gasses Induced by Ferroelectric Transition in SbSI Nanowires
Autorzy:
Szperlich, P.
Nowak, M.
Jesionek, M.
Starczewska, A.
Mistewicz, K.
Szala, J.
Powiązania:
https://bibliotekanauki.pl/articles/1376059.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.43.Vx
77.84.-s
68.43.-h
62.23.Hj
Opis:
For the first time the thermal desorption of $H_2$, $N_2$, $O_2$ and $CO_2$ is presented for antimony sulfoiodide (SbSI) xerogel made up of large quantity nanowires. The desorption has been observed near ferroelectric phase transition established at $T_{c}$=293.0(2) K. The Sievert measurements have shown that the hydrogen uptake is linear function of $H_2$ pressure (when p < 1.1×$10^5$ Pa). The hydrogen storage density in SbSI gel amounted 1.24× $10^{-2}$ wt% (for p = 1.08×$10^5$ Pa at room temperature).
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1110-1112
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of SbSI Photonic Crystals
Autorzy:
Starczewska, A.
Szperlich, P.
Nowak, M.
Bednarczyk, I.
Bodzenta, J.
Szala, J.
Powiązania:
https://bibliotekanauki.pl/articles/1376062.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.70.Qs
77.84.-s
78.40.Fy
Opis:
Semiconducting ferroelectric antimony sulfoiodide (SbSI) photonic crystals were fabricated. The $SiO_{2}$ nanospheres were synthesized and gravity sedimented to obtain opal matrices. These opals were infiltrated with melted SbSI and etched in HF acid to produce inverted SbSI opals.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1118-1120
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of Transition Metal Molybdates
Autorzy:
Konieczny, P.
Pełka, R.
Grzesiak-Nowak, M.
Szymańska, A.
Łasocha, W.
Wasiutyński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1368631.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Xx
75.50.Ee
75.50.-y
Opis:
Two examples of transition metal molybdates were studied with the use of X-ray diffraction and DC magnetometry techniques. First compound, copper dimolybdate trihydrate $CuMo_{2}O_{7}$·$3H_{2}O$ contains 2D layers. The second one is fibrillar cobalt trimolybdate octahydrate $CoMo_{3}O_{10}$·$8H_{2}O$. Both compounds exhibit paramagnetic behaviour at room temperature. However, in the first one copper ions form dimers linked by oxygen bridges, in which exchange interactions between two localized spin states occur. The second compound consists of isolated cobalt ions in the octahedral surroundings, resulting in magnetic properties deviating from the Curie law.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 250-251
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum Effects in Electrical Conductivity and Photoconductivity of Single SbSI Nanowire
Autorzy:
Mistewicz, K.
Nowak, M.
Wrzalik, R.
Jesionek, M.
Szperlich, P.
Paszkiewicz, R.
Guiseppi-Elie, A.
Powiązania:
https://bibliotekanauki.pl/articles/1399097.pdf
Data publikacji:
2013-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.07.Vb
81.07.Bc
73.63.Bd
Opis:
For the first time current quantization is reported for antimony sulfoiodide (SbSI) nanowires. It has been registered in current responses on electric field switching as well as on illumination on and off. Current steps determined in all experiments have been equal to each other within the experimental error. It has been explained by the quantized change of free carrier concentration in nanowire. Lateral dimensions of SbSI nanowires estimated from quantum steps are comparable with geometrical data reported for the same technology of material preparation.
Źródło:
Acta Physica Polonica A; 2013, 124, 5; 827-829
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of Sonochemically Prepared $CuIn_{x}Ga_{1-x}S_{2}$ and $CuIn_{x}Ga_{1-x}Se_{2}$
Autorzy:
Jesionek, M.
Nowak, M.
Szperlich, P.
Kępińska, M.
Mistewicz, K.
Toroń, B.
Stróż, D.
Szala, J.
Rzychoń, T.
Powiązania:
https://bibliotekanauki.pl/articles/1376056.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.35.Ei
72.20.Jv
72.40.+w
81.07.Bc
Opis:
Nanoparticles of chalcopyrites copper indium gallium sulfide ($CuIn_{x}Ga_{1-x}S_{2}$ or CIGS) and copper indium gallium selenide ($CuIn_{x}Ga_{1-x}Se_{2}$ or CIGSe) were fabricated sonochemically. They were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, high resolution transmission electron microscopy, selected area electron diffraction, and diffuse reflectance spectroscopy. The electrical and photoelectrical properties of the fabricated nanomaterials were investigated.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1107-1109
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some Structure-Sensitive Properties of NaCl:Ni$\text{}^{2+}$ Crystals
Autorzy:
Nowak-Woźny, D.
Suszyńska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1920587.pdf
Data publikacji:
1992-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.40.+i
Opis:
The effect of thermal treatment upon the yield strength and some optical absorption parameters were investigated for NaCl crystals containing different amount of divalent nickel. It has been shown that the main changes of the structure-sensitive characteristics occur in two temperature ranges. In the low-temperature range (room temperature-473 K) the yield strength of crystals does change drastically whereas the optical parameters of annealed samples become similar to those characteristic of as-received crystals. On the other hand, the high-temperature annealings (473-673 K) mainly affect the optical characteristics remaining the mechanical ones - more or less similar to those typical of the solution treated state. Some correlations of these effects with the morphology of possible nickel clusters have been shortly discussed.
Źródło:
Acta Physica Polonica A; 1992, 81, 3; 419-427
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 34

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