Linear and nonlinear optical response of sulfur-deficient nanocrystallite WS2 thin films

WS2/WO3 Heterostructure-Based Photodetectors on SiO2/Si for Future Optoelectronics

“…Figure shows that the diffraction peaks belong to the as-grown WO 3 , WS 2 , and WS 2 /WO 3 samples. The XRD patterns of WO 3 and WS 2 thin films are in accordance with the JCPDS number of 00043-1035 and 08-0237, respectively, and moreover, no other peaks are observed, which indicates the absence of impurities. , All the films depict multiple peaks, which confirm the polycrystalline state of the as-grown WO 3 , WS 2 , and WS 2 /WO 3 thin films. The characteristic diffraction peaks are assigned to the corresponding reflection plane orientations of WO 3 and WS 2 films according to the JCPDS data and found that WO 3 and WS 2 formed as monoclinic and hexagonal crystal structures, respectively.…”

Employment of Micro- and Nano-WS2 Structures to Enhance the Tribological Properties of Copper Matrix Composites

“…The two samples of pure copper Cu and Cu-2, black and red line respectively in Figure 2, show as expected only typical Cu peaks: at about 43 • for Cu (1 1 1), at 50 • for Cu (2 0 0), and at 74 • for Cu (2 2 0). The samples containing solid lubricants, Cu-WS 2 (blue), Cu-WS 2 -IF (green), and Cu-WS 2 -IF-GNP (purple), exhibit the same peaks for copper and the characteristic peaks of tungsten disulfide that are 14 • for WS 2 (0 0 2), 29 • for WS 2 (0 0 4), 44 • for WS 2 (0 0 6), and 60 • for WS 2 (0 0 8) [48][49][50][51][52][53][54]. The peak usually observable in the range 24 • -26 • , related to the presence of graphene [55], is not detected in the sample Cu-WS 2 -IF-GNP.…”