Preparation of quinary CuNi Zn2−InS4 nanocrystals with wurtzite structure and tunable band gap

Non-Enzymatic Glucose Sensing Based on Incorporation of Carbon Nanotube into Zn-Co-S Ball-in-Ball Hollow Sphere

“…Recorded survey spectrum of Zn-Co-S BHS revealed that Zn, Co and S were the main elements of Zn-Co-S BHS ( Figure 3 a). The Zn 2p XPS spectrum ( Figure 3 b) showed that the spin-orbit splitting of the two peaks, the spin-orbit split doublet with separation between peaks of Zn 2p 3/2 and Zn 2p 1/2 at 1021.2 eV and 1044.3 eV, was about 23 eV, which indicated the presence of Zn oxidation state in the Zn-Co-S BHS [ 34 ]. Figure 3 c showed the peaks located at 779.8 eV in Co 2p 3/2 and 796.4 eV in Co 2p 1/2 in the Co 2p XPS spectrum.…”

Sulfur-source-dependent phase-selective preparation of Cu3NiInSnS6 nanocrystals and their optical and magnetic properties

“…† In fact, it is not difficult to find that the XRD patterns of these samples are very similar to those of multinary chalcogenides with the hexagonal wurtzite structure. 23,25,27,32,35,[37][38][39][40]45,[51][52][53] Therefore, based on the standard hexagonal wurtzite unit cell, the lattice parameters of the experimental XRD data for the disordered wurtzite-structure Cu 3 NiInSnS 6 can be determined as a = 3.8356 Å and c = 6.3387 Å with the help of the CELL software (CELL version 5.0, copyright 1986 by K. Dwight), and the corresponding simulated XRD patterns can be readily obtained using the Diamond software. All the diffraction peaks of these samples are in perfect agreement with the simulated XRD patterns, thus demonstrating that the prepared Cu 3 NiInSnS 6 samples have a hexagonal wurtzite structure.…”

“…4b shows the core-level spectrum of Cu 2p, in which two strong peaks at 932.35 and 952.25 eV with a peak separation of 19.90 eV can be ascribed to the Cu 2p 3/2 and Cu 2p 1/2 of monovalent copper (Cu + ). 23,32,38,40,42 The core-level spectrum of Ni 2p is presented in Fig. 4c, which can be deconvoluted into two groups of doublet peaks.…”

“…Several research works of our group have proved its practicality in developing multinary chalcogenides. 23,25,[32][33][34] It is well known that the design of quaternary/quinary chalcogenide semiconductors can be generally predicted by the cross-substitution of cations in ternary I-III-VI 2 compounds. For example, the replacement of two group-III atoms with one group-II atom and one group-IV atom can result in the formation of not only the four-fold derivatives of I 2 -II-IV-VI 4 compounds but also the six-fold derivatives of I 3 -II-III-IV-VI 6 compounds.…”

Multinary copper-based chalcogenide nanocrystal systems from the perspective of device applications

“…Recently, wurtzite phase CuNi x Zn 2Àx InS 4 (x ¼ 0-2) semiconductor nanocrystals have been reported with a tunable band gap in the visible range between 1.44 and 2.20 eV. 68 In this synthetic strategy, metal acetylacetonate precursors are heated to dissolution at 110 C in oleic acid as the capping agent. DDT serves as the sulfur precursor and is quickly injected into the reaction mixture at 150 C, followed by heating of the reactants at 210 C. The formation mechanism of these nanocrystals…”