Synthesis, structural and electronic properties of monodispersed self-organized single crystalline nanobricks of isocubanite CuFe2S3

Lyubutin, I. S.; Lin, Chun-Rong; Starchikov, S. S.; Siao, Yu-Jhan; Tseng, Yaw‐Teng

doi:10.1016/j.jssc.2014.10.006

Cited by 12 publications

(5 citation statements)

References 34 publications

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“…Literature data for isocubanite Mößbauer parameters vary. Lyubutin et al 65 showed different models for possible fitting procedures. Due to the small amount of isocubanite in the synthesised samples, parameters for this phase could not be refined freely.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and stability of single-phase chalcopyrite – a potential reference material for key investigations in chemistry and metallurgical engineering

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Synthesis and stability of single-phase chalcopyrite – a potential reference material for key investigations in chemistry and metallurgical engineering

et al. 2021

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“…can be helpful in phase identification. Isomer shift values determined from the Mo ¨ssbauer spectra of the B2 and B3 nanocrystals are very high for Fe(III) and very low for Fe(II), 41 implying an intermediate iron oxidation state, which can be achieved though the fast electron exchange between these two form of iron. 40 Very similar Mo ¨ssbauer parameters were recently reported for nanocrystals of isocubanite (known as non-magnetic but never magnetically tested at very low temperatures).…”

Section: Magnetic Properties and Mossbauer Spectroscopymentioning

confidence: 97%

“…Among the different forms of Cu-Fe-S nanocrystals, one can distinguish antiferromagnetic a-CuFeS 2 (tetragonal), [36][37][38] ferromagnetic b-CuFeS 2 (cubic) 36,39 and non-magnetic (down to 78 K) g-CuFeS 2 (tetragonal) 36 phases of chalcopyrite, ferromagnetic CuFe 2 S 3 (cubanite; orthorhombic) 40 and non-magnetic cubic form of cubanite, namely, isocubanite. 41 The point is how to distinguish between chalcopyrite (and its different phases) and cubanite (and its different phases). The diffraction method fails since, for instance, ferromagnetic chalcopyrite and non-magnetic isocubanite yield essentially the same set of Bragg reflections and only Mo ¨ssbauer spectroscopy can help in distinguishing between these phases.…”

Section: Magnetic Properties and Mossbauer Spectroscopymentioning

confidence: 99%

Non-injection synthesis of monodisperse Cu–Fe–S nanocrystals and their size dependent properties

Gabka

Bujak

Żukrowski

et al. 2016

Phys. Chem. Chem. Phys.

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It is demonstrated that ternary Cu-Fe-S nanocrystals differing in composition (from Cu-rich to Fe-rich), structure (chalcopyrite or high bornite) and size can be obtained from a mixture of CuCl, FeCl3, thiourea and oleic acid (OA) in oleylamine (OLA) using the heating up procedure. This new preparation method yields the smallest Cu-Fe-S nanocrystals ever reported to date (1.5 nm for the high bornite structure and 2.7 nm for the chalcopyrite structure). A comparative study of nanocrystals of the same composition (Cu1.6Fe1.0S2.0) but different in size (2.7 nm and 9.3 nm) revealed a pronounced quantum confinement effect, confirmed by three different techniques: UV-vis spectroscopy, cyclic voltammetry and Mössbauer spectroscopy. The optical band gap increased from 0.60 eV in the bulk material to 0.69 eV in the nanocrystals of 9.3 nm size and to 1.39 eV in nanocrystals of 2.7 nm size. The same trend was observed in the electrochemical band gaps, derived from cyclic voltammetry studies (band gaps of 0.74 eV and 1.54 eV). The quantum effect was also manifested in Mössbauer spectroscopy by an abrupt change in the spectrum from a quadrupole doublet to a Zeeman sextet below 10 K, which could be interpreted in terms of the well defined energy states in these nanoparticles, resulting from quantum confinement. The Mössbauer spectroscopic data confirmed, in addition to the results of XPS spectroscopy, the co-existence of Fe(iii) and Fe(ii) in the synthesized nanocrystals. The organic shell composition was investigated by NMR (after dissolution of the inorganic core) and IR spectroscopy. Both methods identified oleylamine (OLA) and 1-octadecene (ODE) as surfacial ligands, the latter being formed in situ via an elimination-hydrogenation reaction occurring between OLA and the nanocrystal surface.

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“…Furthermore, as above discussed, S4 and S5 with more Fe 2+ produced by stronger reduction would accelerate atomic exchange and varied ratio of two valences stated iron ions, resulting in stronger magnetism. Another reason for the producing of magnetization is the presence of Fe–S type of magnetism impurities in the CuFe 2 S 3 crystals [ 42 ]. It has been discussed above, more S 2- produced and reduction of Fe 3+ to Fe 2+ by DT and thiourea, hence, some non-stoichiometric precipitates might be produced and resulted in some Fe–S type of magnetism impurities in S4 and S5.…”

Section: Discussionmentioning

confidence: 99%

Facile synthesis of nano-sized CuFe2S3: morphology and diverse functional tuning and crystal growth mechanism exploring

Zhang

Zhao

Zhu

et al. 2017

Regenerative Biomaterials

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Ternary chalcogenide compounds are such promising and have been used for much practical applications. As a sort of these compounds, cubanite (CuFe2S3) possess some unique properties which can be used in different fields. In our study, we developed a facile one pot synthesis of CuFe2S3 nanocrystals (NCs) at a low reaction temperature, and achieved a morphology and phase composition tuning of the NCs through changing a variety of precursors and surfactants, meanwhile improved their magnetism and optical properties. Eventually, well-ordered and ‘nano-brick’ like CuFe2S3 NCs were obtained and showed best magnetism and near-infrared fluorescence properties. Furthermore, the NCs were proved with good biocompatibility and possibility for cell labeling. This kind of materials with lower toxicity and potential of magnetic is bound to remedy the defects of photoluminescence quantum dots (QDs) and be with higher potential in the field of biological diagnosis and multi-functional system construction.

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Synthesis, structural and electronic properties of monodispersed self-organized single crystalline nanobricks of isocubanite CuFe2S3

Cited by 12 publications

References 34 publications

Synthesis and stability of single-phase chalcopyrite – a potential reference material for key investigations in chemistry and metallurgical engineering

Synthesis and stability of single-phase chalcopyrite – a potential reference material for key investigations in chemistry and metallurgical engineering

Non-injection synthesis of monodisperse Cu–Fe–S nanocrystals and their size dependent properties

Facile synthesis of nano-sized CuFe2S3: morphology and diverse functional tuning and crystal growth mechanism exploring

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