Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis Method
A concept of a nanoporous anodic aluminum oxide (AAO) membrane as a vibro-active micro/nano-filter in a micro hydro mechanical system for the filtration, separation, and manipulation of bioparticles is reported in this paper. For the fabrication of a nanoporous AAO, a two-step mild anodization (MA)...
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MDPI AG
2020-07-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/14/3833 |
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| author | Yatinkumar Patel Giedrius Janusas Arvydas Palevicius Andrius Vilkauskas |
| author_facet | Yatinkumar Patel Giedrius Janusas Arvydas Palevicius Andrius Vilkauskas |
| author_sort | Yatinkumar Patel |
| collection | DOAJ |
| description | A concept of a nanoporous anodic aluminum oxide (AAO) membrane as a vibro-active micro/nano-filter in a micro hydro mechanical system for the filtration, separation, and manipulation of bioparticles is reported in this paper. For the fabrication of a nanoporous AAO, a two-step mild anodization (MA) and hard anodization (HA) technique was used. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to analyze the surface morphology of nanoporous AAO. A nanoporous structure with a pore diameter in the range of 50–90 nm, an interpore distance of 110 nm, and an oxide layer thickness of 0.12 mm with 60.72% porosity was obtained. Fourier-transform infrared spectroscopy (FTIR) and energy-dispersive X-ray spectroscopy (EDS) were employed to evaluate AAO chemical properties. The obtained results showed that the AAO structure is of hexagonal symmetry and showed where Al<sub>2</sub>O<sub>3</sub> is dominant. The hydrophobic properties of the nanoporous surface were characterized by water contact angle measurement. It was observed that the surface of the nanoporous AAO membrane is hydrophilic. Furthermore, to determine whether a nanomembrane could function as a vibro-active nano filter, a numerical simulation was performed using COMSOL Multiphysics 5.4 (COMSOL Inc, Stockholm, Sweden). Here, a membrane was excited at a frequency range of 0–100 kHz for surface acoustics wave (SAW) distribution on the surface of the nanoporous AAO using a PZT 5H cylinder (Piezo Hannas, Wuhan, China). The SAW, standing acoustic waves, and travelling acoustic waves of different wavelengths were excited to the fabricated AAO membrane and the results were compared with experimental ones, obtained from non-destructive testing method 3D scanning vibrometer (PSV-500-3D-HV, Polytec GmbH, Waldbronn, Germany) and holographic interferometry system (PRISM, Hy-Tech Forming Systems (USA), Phoenix, AZ, USA). Finally, a simulation of a single nanotube was performed to analyze the acoustic pressure distribution and time, needed to center nanoparticles in the nanotube. |
| first_indexed | 2024-03-10T18:35:02Z |
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| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T18:35:02Z |
| publishDate | 2020-07-01 |
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| series | Sensors |
| spelling | doaj.art-dc3e39a3f2dc4f0bb05d5e743f89b7112023-11-20T06:19:17ZengMDPI AGSensors1424-82202020-07-012014383310.3390/s20143833Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis MethodYatinkumar Patel0Giedrius Janusas1Arvydas Palevicius2Andrius Vilkauskas3Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu str. 56, LT-51424 Kaunas, LithuaniaFaculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu str. 56, LT-51424 Kaunas, LithuaniaFaculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu str. 56, LT-51424 Kaunas, LithuaniaFaculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu str. 56, LT-51424 Kaunas, LithuaniaA concept of a nanoporous anodic aluminum oxide (AAO) membrane as a vibro-active micro/nano-filter in a micro hydro mechanical system for the filtration, separation, and manipulation of bioparticles is reported in this paper. For the fabrication of a nanoporous AAO, a two-step mild anodization (MA) and hard anodization (HA) technique was used. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to analyze the surface morphology of nanoporous AAO. A nanoporous structure with a pore diameter in the range of 50–90 nm, an interpore distance of 110 nm, and an oxide layer thickness of 0.12 mm with 60.72% porosity was obtained. Fourier-transform infrared spectroscopy (FTIR) and energy-dispersive X-ray spectroscopy (EDS) were employed to evaluate AAO chemical properties. The obtained results showed that the AAO structure is of hexagonal symmetry and showed where Al<sub>2</sub>O<sub>3</sub> is dominant. The hydrophobic properties of the nanoporous surface were characterized by water contact angle measurement. It was observed that the surface of the nanoporous AAO membrane is hydrophilic. Furthermore, to determine whether a nanomembrane could function as a vibro-active nano filter, a numerical simulation was performed using COMSOL Multiphysics 5.4 (COMSOL Inc, Stockholm, Sweden). Here, a membrane was excited at a frequency range of 0–100 kHz for surface acoustics wave (SAW) distribution on the surface of the nanoporous AAO using a PZT 5H cylinder (Piezo Hannas, Wuhan, China). The SAW, standing acoustic waves, and travelling acoustic waves of different wavelengths were excited to the fabricated AAO membrane and the results were compared with experimental ones, obtained from non-destructive testing method 3D scanning vibrometer (PSV-500-3D-HV, Polytec GmbH, Waldbronn, Germany) and holographic interferometry system (PRISM, Hy-Tech Forming Systems (USA), Phoenix, AZ, USA). Finally, a simulation of a single nanotube was performed to analyze the acoustic pressure distribution and time, needed to center nanoparticles in the nanotube.https://www.mdpi.com/1424-8220/20/14/3833nanoporous aluminum oxidetwo-step anodizationnano filtrationcontact anglesurface acoustic wavesacoustophoresis |
| spellingShingle | Yatinkumar Patel Giedrius Janusas Arvydas Palevicius Andrius Vilkauskas Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis Method Sensors nanoporous aluminum oxide two-step anodization nano filtration contact angle surface acoustic waves acoustophoresis |
| title | Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis Method |
| title_full | Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis Method |
| title_fullStr | Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis Method |
| title_full_unstemmed | Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis Method |
| title_short | Development of Nanoporous AAO Membrane for Nano Filtration Using the Acoustophoresis Method |
| title_sort | development of nanoporous aao membrane for nano filtration using the acoustophoresis method |
| topic | nanoporous aluminum oxide two-step anodization nano filtration contact angle surface acoustic waves acoustophoresis |
| url | https://www.mdpi.com/1424-8220/20/14/3833 |
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