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Fabrication and Characterization of Semiconductor CuCl Nanocrystals

100%

Mahtout S., Belkhir M., Samah M.

Acta Physica Polonica A

2004

vol. 105

issue 3

279-286

CuCl nanocrystals were elaborated in a NaCl ionic matrix by doping the latter with copper powder during growth. Optical absorption measurements revealed nanocrystals with a mean size of order 32 Å. This is consolidated by the Raman scattering measurements which showed nanodomains of similar size. X-ray diffraction measurements indicate a good crystallinity of the matrix and confirm the presence of CuCl nanocrystals within our samples. The annealing effect at 300˚C showed an increase in CuCl nanocrystal size with annealing time and demonstrated clearly the existence of a compound containing copper within our samples.

Effect of Vacancies on Electronic and Magnetic Properties of Hydrogen Passivated Graphene Nanoribbons

76%

Haffad S., Benchallal L., Lamiri L., Boubenider F., Zitoune H., Kahouadji B., Samah M.

Acta Physica Polonica A

2018

vol. 133

issue 5

1307-1313

Using first-principles calculations we have demonstrated that electronic and magnetic properties of armchair graphene nanoribbons are modified by introducing vacancies defects. The equilibrium geometries, electronic, charge spin density distributions, electronic band structures, and magnetic moments were examined in the presence of vacancies. We have found that introducing vacancies into armchair graphene nanoribbons changes the spatial distribution of neighbor atoms, particularly those located around the vacancies. Our calculations showed that the vacancies have significant effect on the magnetization of armchair graphene nanoribbons. Magnetic moment values and electronic behavior in different configurations depend on the number of vacancies. These results suggest that vacancy defects can be used to modify the electronic and the magnetic properties of armchair graphene nanoribbons.

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2 Acta Physica Polonica A

1 2018

1 2004

2 Samah M.

1 Belkhir M.

1 Benchallal L.

1 Boubenider F.

1 Haffad S.

1 Kahouadji B.

1 Lamiri L.

1 Mahtout S.

1 Zitoune H.

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Fabrication and Characterization of Semiconductor CuCl Nanocrystals

Effect of Vacancies on Electronic and Magnetic Properties of Hydrogen Passivated Graphene Nanoribbons