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(Color online) (a) The XRD patterns of samples S1-S5. (b) The representative TEM image of sample S1. Inset: The corresponding EDS result. The HRTEM image (c) and the SAED pattern (d) of sample S1.
(Color online) (a) The M − H curves of ZnS NPs. The notations are used as same as Fig. 1. Inset: the ZFC and FC curves with a dc field of 100 Oe applied on sample S1. (b) The M-H curves measured at different temperatures of sample S1. Inset: The magnified view of the low-field date. (c) The ESR spectrums. (d) The calculated resonance filed and effective g-factor for samples S1-S5.
(a) XPS survey spectrum, high resolution scan of S 2p (b) and Zn 2p (c) of sample S1.
(Color online) (a) The integrated PL intensity of blue emission and Ms for ZnS NPs versus their corresponding levels of sulfur vacancies δ obtained from XPS results. Inset: The PL results of the samples. (b) The dependence of Ms for sample S1 post-annealed with different hydrogen and argon ratio.
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