Ferroelectric properties of ultrasonochemically prepared SbSI ethanogel

Abstract

This article presents for the first time the electrical properties of sonochemically synthesised, high-surface-area SbSI ethanogel made up of large quantity nanowires with lateral dimensions of about 10-50 nm and lengths reaching up to several micrometers. The composition, morphology, dimensions, microstructures, and optical energy gap of the new form of SbSI were characterized. This material is a semiconducting ferroelectric as in the case of bulk SbSI crystals. The maximum of dielectric constant epsilon=1.6x10(4) is observed at Tc=292(1) K. The activation energies in temperature dependences of electric conductivity of SbSI ethanogel are different for ferroelectric and paraelectric phases during heating and cooling of the sample.

Novel piezoelectric paper based on SbSI nanowires

“…Textured polycrystalline SbSI was used for the construction of actuators (Nowak et al 2009b). The Curie temperature of ferroelectric SbSI nanowires [T C = 292(1) K (Szperlich et al 2009)] is close to room temperature. But, the coexistence of ferroelectric and paraelectric phases is observed in SbSI crystals at rather wide range of temperatures, for example, 38 K (Zadorozhnaya et al 1973).…”

Desorption of Gasses Induced by Ferroelectric Transition in SbSI Nanowires

“…For temperatures above T C , ε(T) dependence was least-squares tted ( Fig. 2) with the CurieWeiss relation with the Curie constant C = 1.41(14) × 10 4 K and the Curie temperature T C = 293.0(2) K. The determined maximum value 1.46 × 10 4 of dielectric constant is little lower than the peak ε(T C = 292(1) K)=1.6×10 4 reported in [9] for SbSI ethanogel and less than the ε(T C = 291 K)=6.2 × 10 4 measured along the polar axis of the best SbSI single crystals [10]. One should remember that SbSI is a highly anisotropic material and the permittivity of SbSI single crystal of the polar direction is about 2000 larger than that of the perpendicular direction [11].…”

Fabrication of SbSI Photonic Crystals

“…In this work antimony sulfoiodide (SbSI) was used for the construction of photonic crystal. SbSI is a ferroelectric semiconductor with relatively high refractive index strongly dependent on temperature [2] and external electric eld, especially near its Curie point (T C = 292(1) K) [3]. Therefore, SbSI is potentially very useful in fabrication of tunable photonic crystals.…”