Sol–gel synthesis of highly luminescent magnesium oxide nanocrystallites

Comparative study of microwave and conventional methods for the preparation and optical properties of novel MgO-micro and nano-structures

“…Therefore, in spectrum (b) a broad emission band observed at 437.0 nm (2.83 eV) is arising due to 3 B 1u → 1 A g transition of the F 2 2+ centre in D 2h symmetry. This can be compared with the 425-443 nm (2.92-2.80 eV) emission peak reported earlier by Kumar et al [36]. Moreover, in literature the 390 nm and 530 nm emission bands are present in the PL spectra of bulk MgO with different defect densities [37].…”

Defect and adsorbate induced ferromagnetic spin-order in magnesium oxide nanocrystallites

“…The absorption peaks observed around 1442-1462, 1330, and 1155-1162 cm À1 are attributed to the vibration of the H À species bonded to one, two, and three Mg 2þ ions, respectively, which are similar to the bands observed at $1418-1430, 1325, and 1125 cm À1 in MgO crystallites treated with H 2 . [20][21][22] The source of hydrogen in MgO nanocrystallites is retained moisture which on heterolytic dissociation leads to surface hydride group and substitution mass defect H À at oxygen vacancies (inset of Fig. 3(b)) as…”

Synthesis and characterization of MgO nanocrystals for biosensing applications

“…Although different kinds of MgO nanostructures have been fabricated by a variety of methods [10][11][12], reports on rapid synthesis of MgO nanostructures are sparse, and only our group have obtained them by direct current (DC) arc plasma jet chemical vapor deposition (CVD) [13]. The growth time does not exceed 10 min using this synthesis method; the growth rate of DC arc plasma jet CVD is much higher than that by other methods [14].…”