Synthesis of Nanoparticulate Alloys of the Composition Cu2Zn1–xFexSnS4: Structural, Optical, and Magnetic Properties
摘要:
Nanoparticles of the semiconductor Cu2Zn1-xFexSnS4 with different mole fractions of iron (x(Fe)) were synthesized by the decomposition of molecular precursors in oleylamine. The composition, structure, optical, and magnetic properties of the nanoparticles are reported. The parent (Cu2ZnSnS4) zinc material is usually reported as kesteritic and the corresponding iron phase as stannitic; with different site occupancies and tetragonalities. In the small ca. 8-10 nm particles prepared, the smooth variation in lattice parameters and other measured properties suggest that the phase change, with composition, may be absent. SQUID magnetometry suggests that the iron containing samples are ferromagnetic at 5 K and paramagnetic at 300 K.
一系列的二硫代氨基甲酸盐[Sn(C 4 H 9)2(S 2 CN(RR')2)2 ](R,R'=乙基(1); R =甲基,R'=丁基(2) ; R,R'=丁基(3); R =甲基,R'=己基(4);以及[Sn(C 6 H 5)2(S 2 CN(RR')2)2 ](R,R' =乙基(5); R =甲基,R′=丁基(6); R,R′=丁基(7); R =甲基,R′=己基(8))合成。的单晶X射线结构2,3,和8进行了测定。热重量分析(TGA)显示出对络合物单步分解1,3,及5 - 8,和双分解步的复合物2和4和325之间195℃℃。复杂1 – 4在400°C至530°C的温度下,它们用作通过气溶胶辅助化学气相沉积(AACVD)沉积SnS薄膜的单源前驱体。在所有沉积温度下,从所有四个络合物沉积正交晶SnS薄膜。膜的特征在于紫外可见光谱,粉末X射线衍射(p-XRD),拉曼光谱,扫描电子显微镜(SE
Di-alkyl tin(IV) bis-dithiocarbamato complexes of the type R2Sn(IV)[R′R″dtc]2 or R2Sn(IV)[morph. dtc]2 (where R = n-Bu, n-Hex, R′ = R″ = Me, Et, i-Pr; R′ = Me and R″ = Ph) have been prepared by the reaction of di-n-butyl or di-n-hexylSn(IV) dichloride with the sodium salt of respective dithiocarbamic acid in 1:2 molar ratio in dry acetone. The IR, 1H NMR and Mossbauer studies indicate an anisobidentate
R 2 Sn(IV)[R'R''dtc] 2或R 2 Sn(IV)[晶型类型的二烷基锡(IV)双-二硫代氨基甲酸酯络合物。DTC] 2(R =其中Ñ -Bu,Ñ -六角,R'= R“=甲基,乙基,异-镨; R'=我和R”= PH)已经制备由二的反应Ñ -丁基或二正己基二氯化锡(Ⅳ)与二硫代氨基甲酸的钠盐在无水丙酮中的摩尔比为1:2。IR,1 H NMR和Mossbauer研究表明这些络合物中dtc(二硫代氨基甲酸酯)配体具有各向异性特征。