Effects of high-temperature annealing on structural and optical properties of highly ordered porous alumina membranes

Xu, W. L.; Zheng, M. J.; Wu, S.; Shen, W. Z.
November 2004
Applied Physics Letters;11/8/2004, Vol. 85 Issue 19, p4364
Academic Journal
We report on the structural and optical properties of highly ordered porous alumina membranes (PAMs) under different annealing temperatures up to 1100 °C. Clear structural transition from amorphous to γ- and then to α-Al2O3 has been demonstrated in PAMs through x-ray diffraction and micro-Raman scattering measurements. The crystallization of the PAMs under an annealing temperature above 800 °C results in the appearance of two absorption structures in the transmission spectra ranging from 1500 to 1700 cm-1 due to the formation of stable carboxylic impurities. We have presented convincing evidence that the blue photoluminescence band in PAMs originates from the coactions of the singly ionized oxygen vacancies (F+ centers) and the luminescent centers transformed from oxalic impurities.


Related Articles

  • Photo- and thermally induced changes in the refractive index and film thickness of amorphous As2S8 film. Zou, L. E.; Chen, B. X.; Du, L. P.; Hamanaka, H.; Iso, M. // Journal of Applied Physics;Jun2008, Vol. 103 Issue 12, p123523 

    Changes in the refractive index and thickness of amorphous As2S8 semiconductor film are observed under illumination, annealing–illumination, and annealing-illumination cycles. Properties of the As2S8 film are measured using techniques of prism coupler, x-ray diffraction spectra and Raman...

  • Influence of Annealing Temperature on the Phase Transformation of Al2O3. Mahat, Annie Maria; Mastuli, Mohd Sufri; Kamarulzaman, Norlida // AIP Conference Proceedings;2/12/2016, Vol. 1711, p1 

    In the present study, Al2O3 powders were prepared via a self-propagating combustion method using citric acid as a combustion agent. Effects of annealing temperature on the phase transformation of the prepared powders were studied on samples annealed at 800 °C and 1000 °C. The Al2O3 samples...

  • Characterization of strained Si/Si[sub 1-x]Ge[sub x]/Si heterostructures annealed in oxygen or argon. Lindgren, A.-C.; Chen, C.; Zhang, S.-L.; Östling, M.; Zhang, Y.; Zhu, D. // Journal of Applied Physics;3/1/2002, Vol. 91 Issue 5, p2708 

    The strained Si/Si[sub 1-x]Ge[sub x]/Si layer heterostructure heat treated from 700°C to 950°C in Ar (annealing) or 0[sub 2]-C[sub 2]H[sub 2]Cl[sub 2] (oxidation) was characterized using high-resolution x-ray diffraction in combination with Rutherford backscattering. Only small changes to...

  • Properties of sol-gel derived YAG:Eu3+ hierarchical nanostructures with their time evolution studies. Sharma, Prashant K.; Kumar, Manvendra; Singh, Prashant K.; Pandey, Avinash C.; Singh, V. N. // Journal of Applied Physics;Feb2009, Vol. 105 Issue 3, pN.PAG 

    Eu3+ doped yttrium aluminum garnet (YAG) nanoparticles were synthesized by sol-gel method. The samples were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), and photoluminescence (PL) spectroscopy including vacuum ultraviolet (VUV) PL spectroscopy. XRD confirmed...

  • Effects of γ-ray irradiation and thermal annealing on structural, optical and electrical properties of vacuum deposited vanadyl 2,3-naphthalocyanine thin films. Panicker, Nisha S.; Menon, C. S. // Journal of Materials Science;Jul2011, Vol. 46 Issue 13, p4479 

    Vacuum deposited vanadyl naphthalocyanine (VONc) crystalline thin films were produced. The films showed a completely different structural and growth pattern on thermal annealing and γ-ray irradiation. The XRD spectra revealed polycrystalline nature for both annealed and γ-ray irradiated...

  • Local Phenomena in metamict Titanite. Bismayer, U.; Paulmann, C.; Groat, L.; Zhang, M. // Acta Physica Polonica, A.;Jan2010, Vol. 117 Issue 1, p74 

    Pure titanite is a mineral with chemical composition CaTiSiO5. Its structure consists of corner linked TiO6-octahedra, SiO4-tetrahedra and sevenfold coordinated Ca positions. In nature various impurities like U and Th can be incorporated in the structure showing alpha and beta radiation. On...

  • Structural origin of set-reset processes in Ge15Te83Si2 glass investigated using in situ Raman scattering and transmission electron microscopy. Anbarasu, M.; Asokan, S.; Prusty, Sudakshina; Sood, A. K. // Journal of Applied Physics;Apr2009, Vol. 105 Issue 8, p084517 

    We report here that the structural origin of an easily reversible Ge15Te83Si2 glass can be a promising candidate for phase change random access memories. In situ Raman scattering studies on Ge15Te83Si2 sample, undertaken during the amorphous set and reset processes, indicate that the degree of...

  • Growth Of ZnO Based Ternary Nanostructures By Electrodeposition. Singh, Trilok; Pandya, D. K.; Singh, R. // AIP Conference Proceedings;12/1/2010, Vol. 1313 Issue 1, p115 

    ZnO, CdO and ZnCdO thin films exhibiting various nanostructures on the surface were grown by electrodeposition technique. The effect of deposition potential on the growth of thin films and nanostructures were studied. It has been observed that for ternary system ZnCdO, the best deposition...

  • Study the Influence of Thermal Annealing in Presence of Oxygen Flow on the Nano- Structures and Optical Properties of Titanium Oxide Thin Layers. Rafizadeh, Saeid // Journal of Applied Sciences Research;Aug2011, Vol. 7 Issue 8, p771 

    Ti films of the same thickness, were deposited on glass substrate under UHV conditions at room temperature and near normal deposition angle. Different annealing temperatures as 410 °K and 510 °K with uniform 7 cm3/sec, oxygen flow, were used for producing titanium oxide layers. AFM and XRD...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics