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7 Acta Physica Polonica A

7 2014

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Dielectric Properties of SbSI in the Temperature Range of 292-475~K

100%

Starczewska A. , Solecka B. , Nowak M. , Szperlich P.

nr 5

1125-1127

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.

Mobility of Ferroelectric Domains in Antimony Sulfoiodide

100%

Toroń B. , Nowak M. , Kępińska M. , Szperlich P.

nr 5

1093-1095

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.

Optical Properties of SbSI Photonic Crystals

88%

Kępińska M. , Starczewska A. , Duka P. , Nowak M. , Szperlich P.

nr 5

1115-1117

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.

SbSI Single Nanowires as Humidity Sensors

88%

Mistewicz K. , Nowak M. , Szperlich P. , Jesionek M. , Paszkiewicz R.

nr 5

1113-1114

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.

Desorption of Gasses Induced by Ferroelectric Transition in SbSI Nanowires

75%

Szperlich P. , Nowak M. , Jesionek M. , Starczewska A. , Mistewicz K. , Szala J.

nr 5

1110-1112

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).

Fabrication of SbSI Photonic Crystals

75%

Starczewska A. , Szperlich P. , Nowak M. , Bednarczyk I. , Bodzenta J. , Szala J.

nr 5

1118-1120

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.

Properties of Sonochemically Prepared CuIn_{x}Ga_{1-x}S_{2} and CuIn_{x}Ga_{1-x}Se_{2}

63%

Jesionek M. , Nowak M. , Szperlich P. , Kępińska M. , Mistewicz K. , Toroń B. , Stróż D. , Szala J. , Rzychoń T.

nr 5

1107-1109

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.