555-36-2Relevant articles and documents
Liquid-like interfacial correlation in LB films
Sanyal,Basu,Datta
, p. 217 - 222 (1998)
We present here results of X-ray reflectivity and diffuse scattering study of three Langmuir-Blodgett films, all having nine monolayers. These systems are the cadmium arachidate film grown using the conventional method, the arachidic acid film with trapped CdS layers at the interfaces formed by exposing the cadmium arachidate film to hydrogen sulphide and ferric stearate film grown from a monolayer of the pre-formed salt on water. Self-consistent analysis of all the scattering data measured, viz., in specular, in transverse and in longitudinal directions, for each film shows that the interfaces are conformal in nature and the logarithmic in-plane correlation, characteristic of capillary waves on liquid surfaces, exists in all the three films.
Facile Gram-Scale Synthesis of the First n-Type CuFeS2 Nanocrystals for Thermoelectric Applications
Gabka, Grzegorz,Zyba?a, Rafa?,Bujak, Piotr,Ostrowski, Andrzej,Chmielewski, Marcin,Lisowski, Wojciech,Sobczak, Janusz W.,Pron, Adam
supporting information, p. 3150 - 3153 (2017/07/22)
The described method enables facile gram-scale preparation of CuFeS2 nanocrystals exhibiting interesting thermoelectric properties from simple and readily available precursors. Exchange of primary organic ligands for inorganic ones using either (NH4)2S or triethyloxonium tetrafuoroborate (Meerwein's salt) resulted in nanocrystals from which n-type bulk thermoelectric materials were obtained through sintering under pressure. The measured physical properties of the fabricated bulk thermoelectric materials depend on the type of inorganic ligands used for the exchange. In particular, materials that were surface-modified with Meerwein's salt have a higher Seebeck coefficient (|S| = 238 μV K–1) as compared to those modified with (NH4)2S, whereas the latter exhibit higher electrical conductivity (8500 S m–1) and lower thermal conductivity (0.5 W m–1 K–1), both of which are favorable for thermoelectric applications.
Cu-Fe-S Nanocrystals Exhibiting Tunable Localized Surface Plasmon Resonance in the Visible to NIR Spectral Ranges
Gabka, Grzegorz,Bujak, Piotr,Ostrowski, Andrzej,Tomaszewski, Waldemar,Lisowski, Wojciech,Sobczak, Janusz W.,Pron, Adam
supporting information, p. 6660 - 6669 (2016/07/19)
Cu-Fe-S nanocrystals exhibiting a strong localized surface plasmon resonance (LSPR) effect were synthesized for the first time. The elaborated reproducible preparation procedure involved copper(II) oleate, iron(III) stearate, and sulfur powder dissolved in oleylamine (OLA) as precursors. The wavelength of the plasmonic resonance maximum could be tuned by changing the Cu/Fe ratio in the resulting nanocrystals, being the most energetic for the 1:1 ratio (486 nm) and undergoing a bathochromic shift to ca. 1200 nm with an increase to 6:1. LSPR could also be observed in nanocrystals prepared from the same metal precursors and sulfur powder dissolved in 1-octadecene (ODE), provided that the sulfur precursor was taken in excess. Detailed analysis of the reaction mixture by chromatographic techniques, supplemented by mass spectrometry and 1H NMR spectroscopy enabled the identification of the true chemical nature of the sulfur precursor in S/OLA, namely, (C18H35NH3+)(C18H35NH-S8-), a reactive product of the reduction of elemental sulfur by the amine groups of OLA. In the case of the S/ODE precursor, the true precursors are much less reactive primary or secondary thioethers and dialkyl polysulfides.
