High aspect ratio GeO<sub>2</sub>nano- and microwires with waveguiding behaviour

Hidalgo, P.; Méndez, B.; Piqueras, J.

doi:10.1088/0957-4484/18/15/155203

Cited by 33 publications

(39 citation statements)

References 16 publications

(20 reference statements)

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“…Therefore GeO 2 is a promising material for various applications such as optoelectronic devices, photo sensors and vacuum technology, etc. [7]. It is well known that germanium oxide crystallized in two stable crystalline structures on ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Nejaty-Moghadam

Esmaeili-Bafghi-Karimabad

Gholamrezaei

et al. 2015

J Mater Sci: Mater Electron

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In this work, germanium dioxide nanostructures were prepared by a facile co-precipitation method. In this synthesis approach was used from acetyl acetone as capping agent to get the smallest nanoparticles. Some of effective parameters were optimized to achieve the best morphology of product, such as mole ratio of acetyl acetone, temperature and time. Small germania nanostructures with a size about 70 nm sizes were achieved in this method. Nanostructures were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared techniques X-ray energy dispersive spectroscopy and ultraviolet spectroscopy (UV-Vis). Various properties such as photoluminescence, photocatalytic and photovoltaic property were studied for as-prepared nanostructures. Results of germania nanostructures show that product revealed a PL band that caused from recombination of electron and hole in nanostructure. On the other hand, these nanostructures show a good photocatalytic behavior for degradation of methyl orange in presence of UV light. Therefore germania nanoparticles applied in photovoltaic measurement.

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Section: Introductionmentioning

confidence: 99%

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Nejaty-Moghadam

Esmaeili-Bafghi-Karimabad

Gholamrezaei

et al. 2015

J Mater Sci: Mater Electron

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“…This method has been previously reported to lead to the growth of elongated structures of different semiconductor oxides on the surface of the sample, so that neither a catalyst nor a foreign substrate is used. [8][9][10][11][12][13] In Ref. 8, the growth of SnO 2 microand nanotubes with rectangular cross section was reported, while in the case of In 2 O 3 , 11 wires, necklace-and arrowshape structures were grown from InN.…”

Section: Introductionmentioning

confidence: 99%

Thermal growth and structural and optical characterization of indium tin oxide nanopyramids, nanoislands, and tubes

Maestre

Cremades

Piqueras

et al. 2008

Journal of Applied Physics

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In-doped SnO 2 microtubes as well as Sn-doped In 2 O 3 ͑ITO͒ nano-and microislands have been grown by thermal treatment of compacted SnO 2 -In 2 O 3 powders under argon flow at 1350°C in a catalyst-free process. The SnO 2 tubes contain about 1 at. % of In, even when the In content in the starting mixture was as high as 52 at. %. However, the ITO nanoislands and nanopyramids, grown preferentially on the faces and edges of the tubes, present an In content up to six times higher than the tubes. Spatially resolved cathodoluminescence shows a higher emission from the Sn-rich structures, so that the In-rich ITO nanoislands show dark contrast in the CL images. CL spectra show that the main emission bands in both, Sn-rich and In-rich, structures, are related to oxygen deficiency. X-ray photoelectron spectroscopy shows differences between the tubes and the nanoislands in the O ͑1s͒ spectral region. In particular, a component at 531.9 eV of the O ͑1s͒ signal appears enhanced in the In-rich islands.

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“…12 and GeO 2 . 13 In the present work Ga 2 O 3 nanowires undoped and doped with Er or Cr have been grown by a thermal evaporation-deposition method under argon flow. The nanowires have been characterized by x-ray diffraction ͑XRD͒, scanning electron microscopy ͑SEM͒, and photoluminescence ͑PL͒.…”

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confidence: 99%

Doped gallium oxide nanowires with waveguiding behavior

Nogales

Garcı́a

Méndez

et al. 2007

Applied Physics Letters

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Er and Cr doped β-Ga2O3 nano- and microwires have been grown by thermal treatments of Ga2O3 powder containing a fraction of Er2O3 powder or in the presence of Cr2O3 powder, respectively. Doping gives rise to the characteristic red photoluminescence (PL) of Cr3+ ions at about 700nm and to green emission of Er3+ at about 555nm. Waveguiding of the ion related PL light excited in the wires has been studied for wires with different sizes. Waveguide behavior for incident visible light of different wavelengths was demonstrated.

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High aspect ratio GeO₂nano- and microwires with waveguiding behaviour

Cited by 33 publications

References 16 publications

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Thermal growth and structural and optical characterization of indium tin oxide nanopyramids, nanoislands, and tubes

Doped gallium oxide nanowires with waveguiding behavior

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High aspect ratio GeO2nano- and microwires with waveguiding behaviour

Cited by 33 publications

References 16 publications

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Thermal growth and structural and optical characterization of indium tin oxide nanopyramids, nanoislands, and tubes

Doped gallium oxide nanowires with waveguiding behavior

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High aspect ratio GeO₂nano- and microwires with waveguiding behaviour