(a) X-ray diffraction pattern of slightly crushed CdS platelets (Kα radiation of cobalt anticathode); (b) X-ray diffraction patterns of ground CdS platelets (Kα radiation of copper anticathode); (c), (d) examples of electron diffraction patterns recorded on 1-h ground crystals.

Contexts in source publication

Context 1

... to the two main contributions of the G 1 band group (diamonds at respectively 92 and 112 cm −1 ). In this scheme, G 1 indicates some 4H and 6H stacking sequences in the platelets (4H and 6H CdS were already found in CdS thin films [50] ). A few examples of room-temperature spectra showing ex- tremely weak LO contributions (bottom spectrum in Fig. S2: supporting information) suggest that some regions with a very high stacking fault density existed in the as-prepared ...

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... platelet size falls between approximately 50 and 500 nm after 1-h milling ( Figure S3: supporting information) and further attrition reduces the size to approximately 30 nm (2.5 h) and 10 nm (6 h). [4] Meanwhile, the samples colour changes from yellow to red-orange. Fig. 2(a) for the three peaks to originate from the same phase. Fig. 2(b) thus confirms the presence of some cubic phase in the CdS platelets (the (1 1 1) c contribution is ascertained), in increasing proportion to increasing grinding time. The simultaneous broadening of all Raman bands (Fig. 7(a) is not surprising since the structure gets ...

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... platelet size falls between approximately 50 and 500 nm after 1-h milling ( Figure S3: supporting information) and further attrition reduces the size to approximately 30 nm (2.5 h) and 10 nm (6 h). [4] Meanwhile, the samples colour changes from yellow to red-orange. Fig. 2(a) for the three peaks to originate from the same phase. Fig. 2(b) thus confirms the presence of some cubic phase in the CdS platelets (the (1 1 1) c contribution is ascertained), in increasing proportion to increasing grinding time. The simultaneous broadening of all Raman bands (Fig. 7(a) is not surprising since the structure gets polycrystalline. In the first hour of grinding, the LO peak remains ...

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... is not surprising since the structure gets polycrystalline. In the first hour of grinding, the LO peak remains fine enough and sufficiently close to 306 cm −1 to be considered the signature of h-CdS, making I G2 /I LO intensity ratio an indirect probe for the stacking faults density (Fig. 7(b)). For longer milling, electron diffraction patterns (Fig. 2(c), (d)) show the coexistence of zones with faulted h-CdS stacking (smeared spots) and zones with cubic nanodomains (dotted diffraction rings), as confirmed by the TEM image in Fig. 8 ...