Results 241 to 250 of about 27,222 (284)

Structural chemistry of anodic alumina

Thin Solid Films, 1989
Abstract Magic angle spinning-nuclear magnetic resonance has been used as a structural probe for porous anodic films formed on aluminium in oxalic acid. The morphologically and compositionally characterized films reveal four-, five-and sixfold coordination of aluminium with oxygen.
I. Farnan, R. Dupree, Y. Jeong, G.E. Thompson, G.C. Wood, A.J. Forty   +5 more
openaire   +1 more source

Anodic alumina photonic crystal heterostructures

Journal of the Optical Society of America B, 2011
Anodic alumina photonic crystal heterostructures (PCHs) consisting of two photonic crystals with different lattice constants are fabricated under the combination of two periodic oxidation voltage waves with similar voltage waveforms but different upper and lower bound values. The optical properties of these PCHs are studied.
Su, Yan, Fei, Guang Tao, Zhang, Yao, Li, Hui, Yan, Peng, Shang, Guo Liang, Zhang, Li De   +6 more
openaire   +2 more sources

Adsorption on Porous Anodized Alumina

Poromechanics VI, 2017
Porous anodized aluminum oxide (AAO) is an ideal playground for fundamental studies on adsorption. Straight, not-interconnected pores having diameter of a few tens of nanometers with a relative dispersion below 1% and lengths up to hundreds of microns can be easily produced on large surface areas.
MISTURA, GIAMPAOLO, BRUSCHI, LORENZO, Lee, W.   +2 more
openaire   +1 more source

Contact angle studies on anodic porous alumina

Journal of Colloid and Interface Science, 2005
The preparation of nanostructures using porous anodic aluminum oxide (AAO) as templates involves the introduction of dissolved materials into the pores of the membranes; one way to determine which materials are preferred to fill the pores involves the measurement of the contact angles (theta) of different solvents or test liquids on the AAOs.
Rocío, Redón, A, Vázquez-Olmos, M E, Mata-Zamora, A, Ordóñez-Medrano, F, Rivera-Torres, J M, Saniger   +5 more
openaire   +2 more sources

Optical waveguides fabricated in anodic alumina films

Optics Letters, 1994
The transmittance of an anodic alumina film changes significantly with the refractive index of the guest material that is contained in columnar pores. We fabricated a channel waveguide with a Y junction in an alumina film by filling the pores with photocurable resins of suitable refractive indices.
M, Saito, M, Shibasaki, S, Nakamura, M, Miyagi   +3 more
openaire   +2 more sources

Fabrication of porous anodic alumina using normal anodization and pulse anodization

AIP Conference Proceedings, 2015
This article reports on the fabrication of porous anodic alumina (PAA) by two-step anodizing the low purity commercial aluminum sheets at room temperature. Different variations of the second-step anodization were conducted: normal anodization (NA) with direct current potential difference; pulse anodization (PA) alternate between potential differences ...
I. K. Chin, F. K. Yam, Z. Hassan
openaire   +1 more source

Advanced hard anodic alumina coatings via etidronic acid anodizing

Surface and Coatings Technology, 2017
Abstract Advanced hard anodic alumina coatings measuring Hv = 610–769 on the Vickers hardness scale were obtained on an aluminum surface via aluminum anodizing using a new electrolyte, etidronic acid. The ordered porous alumina was fabricated by two-step etidronic acid anodizing at 260 V under self-ordering conditions, and pore-widening was carried ...
Tatsuya Kikuchi, Akimasa Takenaga, Shungo Natsui, Ryosuke O. Suzuki   +3 more
openaire   +1 more source

Electrolyte hydrodynamics in anodic alumina pores

Russian Microelectronics, 2014
The electrolyte movement mechanism in the pores of porous anodic alumina under the electric field action during the oxide formation is discussed. A qualitative model for the electrolyte exchange in the growing pore of porous anodic alumina, taking into account the electric field direction and diffuse layer charge, is presented. Since the anodic alumina
Sokol, V. A., Yakovtseva, V. A.
openaire   +1 more source

Anodic Alumina MEMS: Applications and Devices

Micro-Electro-Mechanical Systems (MEMS), 2000
Abstract Hybrid micromachining of anodic alumina films was shown to be a promising technology for creating ceramic MEMS for harsh application environments. By combining features of both bulk and surface micromachining, this technology offers flexibility in design and tremendous application opportunities.
Alexander Govyadinov, Peter Mardilovich, Kathy Novogradecz, Stephanie Hooker, Dmitri Routkevitch   +4 more
openaire   +1 more source

F8BT nanopillars from porous anodic alumina

physica status solidi (a), 2010
AbstractPoly(9,9‐di‐n‐octylfluorene‐alt‐benzothiadiazole) (F8BT) nanopillars were fabricated using the template wetting method. In order to obtain nanostructures, self‐ordered nanoporous alumina has been employed as template. Environmental scanning electron microscopy (ESEM) images reveal that the resulting F8BT structures present diameters ∼225 nm and
Raquel Palacios, Pilar Formentín, Eugenia Martínez‐Ferrero, Josep Ferre‐Borrull, Josep Pallarès, Lluis F. Marsal   +5 more
openaire   +1 more source