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2 article(s) from Postolache, Vitalie

Electrochemical nanostructuring of (111) oriented GaAs crystals: from porous structures to nanowires

Elena I. Monaico,
Eduard V. Monaico,
Veaceslav V. Ursaki,
Shashank Honnali,
Vitalie Postolache,
Karin Leistner,
Kornelius Nielsch and
Ion M. Tiginyanu

Beilstein J. Nanotechnol. 2020, 11, 966–975, doi:10.3762/bjnano.11.81

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Figure 1: SEM images in cross section of porous GaAs layers for three different conditions of anodization in ...

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Figure 2: (A–C) SEM images in cross section at higher magnification of the porous layers obtained by anodizat...

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Figure 3: (A) SEM images of the formation of interrupted GaAs nanowires on the (111)B surface anodized in NaC...

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Figure 4: (A) SEM image in cross section of a GaAs(111)B sample anodized at 3 V for 20 min in 1 M HNO₃. (B, C...

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Figure 5: PL spectra of bulk (curve 1) and anodized (curve 2) GaAs samples measured at a temperature of 10 K.

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Figure 6: XRD pattern of the anodized GaAs(111)B sample.

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Figure 7: (A) Optical microscopy image of the opened regions in the photoresist on the glass substrate for de...

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Figure 8: Current–voltage characteristics measured in dark (curve 1) and under IR illumination with power den...

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Full Research Paper

Published 29 Jun 2020

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Band tail state related photoluminescence and photoresponse of ZnMgO solid solution nanostructured films

Vadim Morari,
Aida Pantazi,
Nicolai Curmei,
Vitalie Postolache,
Emil V. Rusu,
Marius Enachescu,
Ion M. Tiginyanu and
Veaceslav V. Ursaki

Beilstein J. Nanotechnol. 2020, 11, 899–910, doi:10.3762/bjnano.11.75

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Figure 1: a) SEM images of ZnMgO films deposited on p-Si substrates by spin coating (left column) and aerosol...

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Figure 2: a) SEM image of a ZnMgO film prepared by aerosol spray pyrolysis. b) SEM image of a ZnMgO film prep...

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Figure 3: Elemental composition of a ZnO (a) and a Zn_0.6Mg_0.4O (b) film determined by EDAX analysis.

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Figure 4: PL spectra of Zn₁₋_xMg_xO films deposited by spin coating with x values of 0.00 (1); 0.05 (2); 0.15 (...

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Figure 5: PL spectra of Zn₁₋_xMg_xO films deposited by spin coating with x values of 0.00 (1); 0.10 (2); and 0....

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Figure 6: a) XRD pattern of a Zn_0.8Mg_0.2O film deposited by spin coating on a Si substrate and annealed at 50...

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Figure 7: A model for the band tails distribution at 20 K in Zn₁₋_xMg_xO films with the x value composition of ...

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Figure 8: PL spectra of Zn_0.85Mg_0.15O films by spin coating (curve 1) and aerosol spray pyrolysis (curve 2) m...

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Figure 9: Current–voltage characteristics in dark and under UV illumination for a p-Si/n-Zn_0.9Mg_0.1O heterost...

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Figure 10: Current–voltage characteristics in dark and under UV illumination for a p-Si/n-Zn_0.6Mg_0.4O heterost...

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Full Research Paper

Published 12 Jun 2020

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