geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Enhanced and stable green emission of ZnO nanoparticles by surface segregation of Mg


, : Enhanced and stable green emission of ZnO nanoparticles by surface segregation of Mg. Nanotechnology 17(4): 973-978

The effects of Mg addition on the emission of green photons from ZnO nanoparticles were studied. Energy dispersive x-ray spectroscopy (EDS) and Auger electron spectroscopy (AES) data demonstrated that ZnO nanoparticles with surface segregation of MgO (ZnO:MgO) were precipitated from colloidal reactions between Zn(2+),Mg(2+) and OH(-) ions suspended in ethanol. The photoluminescence emission spectra showed stronger green emission from suspended ZnO:MgO versus ZnO nanoparticles. ZnO:MgO also exhibited a stable green emission colour, which was slightly red-shifted from 495 to 520 nm with 168 days of ageing. It was postulated that the presence of MgO on the surface of ZnO prevented both the aggregation of ZnO nanoparticles via electrostatic stabilization of the suspension, and the formation of non-radiative recombination states on the surface, resulting in more intense, stable photoemission from ZnO. The red shift of the green emission from suspended ZnO nanoparticles with extended ageing was attributed to filling of radiative surface trap states in the bandgap.

US$19.90

PMID: 21727368

DOI: 10.1088/0957-4484/17/4/022


Other references

Schelm, S.; Smith, G.B., 2005: Evaluation of the limits of resonance tunability in metallic nanoshells with a spectral averaging method. Spectral selectivity based on tuning the surface plasmon resonance in metallic nanoshells by variation of the relative shell thickness is shown to be limited by the interplay between scattering and absorption. To achieve resonance energies in the...

Layland, M.K.; Sessions, D.G.; Lenox, J., 2005: The influence of lymph node metastasis in the treatment of squamous cell carcinoma of the oral cavity, oropharynx, larynx, and hypopharynx: N0 versus N+. Management of the N0 neck is a continuing controversy. The study compares the influence of N0 and N+ disease on the results of treating squamous cell carcinoma (SCCA) of the oral cavity (OC), oropharynx (OP), larynx (LX), and hypopharynx (HP) with...

Kaminska, J.; Mazgalska, W., 1988: Reaction of varieties and lines of spring barley to nitrogen fertilizer in a pot experiment. When 9 forms were tested during 1980-82 under 3 different N doses (with P, K and Mg constant), differences in response were noted which were reflected in changes in height, grain and straw yield and protein content and yield. Grain yield at 1 g N/...

Stamen, Rs, 1999: Five simple and inexpensive ways to prevent a lawsuit. Arbor age 19(4): 22-23

Gottwald, T.; Bertrand, P., 1981: Diurnal and seasonal discharge patterns of conidia of the pecan scab fungus Fusicladium effuseum. Phytopathology 71(8): 877

Epping-Jordan, J.E.; Bengoa, R.; Yach, D., 2003: Chronic conditions--the new health challenge. South African Medical Journal 93(8): 585-590

Du, L.; Zhao, G.; Chan, C.C.S.; Sun, S.; Chen, M.; Liu, Z.; Guo, H.; He, Y.; Zhou, Y.; Zheng, B-Jian.; Jiang, S., 2009: Recombinant receptor-binding domain of SARS-CoV spike protein expressed in mammalian, insect and E. coli cells elicits potent neutralizing antibody and protective immunity. Severe acute respiratory syndrome (SARS) is a newly emerging infectious disease. The potential recurrence of the disease from animal reservoirs highlights the significance of development of safe and efficient vaccines to prevent a future SARS epid...

Galbraith H.; Mandebvu P.; Thompson J.K.; Franklin M.F., 1989: Effects of diets differing in the proportion of sugar beet pulp and barley on growth body composition and metabolism of entire male lambs. Animal Production 48(3): 652

Nie XianZhou; Singh, R.P.; Mathuresh Singh, 2004: Molecular and pathological characterization of N:O isolates of the Potato virus Y from Manitoba, Canada. Previous studies have identified a recombinant isolate group of the Potato virus Y (PVY), PVY(N:O), which exhibits a PVY(O) serotype and a PVY(N) pathotype. Molecular fingerprinting indicated that the isolates possess a European (Eu)-PVY(N/NTN)-li...

Jarmusch, A.K.; Alfaro, C.M.; Pirro, V.; Hattab, E.M.; Cohen-Gadol, A.A.; Cooks, R.Graham., 2016: Differential Lipid Profiles of Normal Human Brain Matter and Gliomas by Positive and Negative Mode Desorption Electrospray Ionization - Mass Spectrometry Imaging. NlmCategory="UNASSIGNED">Desorption electrospray ionization-mass spectrometry (DESI-MS) imaging was used to analyze unmodified human brain tissue sections from 39 subjects sequentially in the positive and negative ionization modes. Ac...