Effect of pore diameter in nanoporous anodic alumina optical biosensors

The Analyst ◽  
2015 ◽  
Vol 140 (14) ◽  
pp. 4848-4854 ◽  
Author(s):  
G. Macias ◽  
J. Ferré-Borrull ◽  
J. Pallarès ◽  
L. F. Marsal
Keyword(s):  
Pore Diameter ◽  
Anodic Alumina ◽  
Optical Biosensors ◽  
Nanoporous Anodic Alumina

This study demonstrates how it is possible to tune the sensitivity of nanoporous anodic alumina optical biosensors by adjusting pore diameter.

Nanoporous Anodic Alumina Barcodes: Toward Smart Optical Biosensors

2012 ◽  
Vol 24 (8) ◽  
pp. 1050-1054 ◽  
Author(s):  
Abel Santos ◽  
Victor S. Balderrama ◽  
María Alba ◽  
Pilar Formentín ◽  
Josep Ferré-Borrull ◽  
...  
Keyword(s):  
Anodic Alumina ◽  
Optical Biosensors ◽  
Nanoporous Anodic Alumina

scholarly journals Nanoporous Anodic Alumina: A Versatile Platform for Optical Biosensors

Materials ◽  
2014 ◽  
Vol 7 (6) ◽  
pp. 4297-4320 ◽  
Author(s):  
Abel Santos ◽  
Tushar Kumeria ◽  
Dusan Losic
Keyword(s):  
Anodic Alumina ◽  
Optical Biosensors ◽  
Nanoporous Anodic Alumina

scholarly journals Advances in Optical Biosensors and Sensors Using Nanoporous Anodic Alumina

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5068
Author(s):  
Mahmoud Amouzadeh Tabrizi ◽  
Josep Ferre-Borrull ◽  
Lluis F. Marsal
Keyword(s):  
Heavy Ions ◽  
Review Paper ◽  
High Sensitivity ◽  
Anodic Alumina ◽  
Optical Biosensors ◽  
Sensor Applications ◽  
Nanoporous Anodic Alumina ◽  
Sensitivity And Selectivity ◽  
Good Potential ◽  
Gas Molecules

This review paper focuses on recent progress in optical biosensors using self-ordered nanoporous anodic alumina. We present the fabrication of self-ordered nanoporous anodic alumina, surface functionalization, and optical sensor applications. We show that self-ordered nanoporous anodic alumina has good potential for use in the fabrication of antibody-based (immunosensor), aptamer-based (aptasensor), gene-based (genosensor), peptide-based, and enzyme-based optical biosensors. The fabricated optical biosensors presented high sensitivity and selectivity. In addition, we also showed that the performance of the biosensors and the self-ordered nanoporous anodic alumina can be used for assessing biomolecules, heavy ions, and gas molecules.

scholarly journals Numerical and Experimental Study of the Structural Color by Widening the Pore Size of Nanoporous Anodic Alumina

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Jiawen Li ◽  
Zhiqiang Zhu ◽  
Yanlei Hu ◽  
Jinjin Zheng ◽  
Jiaru Chu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pore Size ◽  
Pore Diameter ◽  
Structural Characteristics ◽  
Fdtd Method ◽  
Anodic Alumina ◽  
Structural Color ◽  
Visible Range ◽  
Nanoporous Anodic Alumina ◽  
Structural Colors

The structural color originated from the nanoporous anodic alumina (NAA) film is related to the structural characteristics. This paper aimed to obtain different structural colors which can cover the whole visible range by widening the pore size of metal-coated NAA. First, we used the Finite Difference Time Domain (FDTD) method to analyze the relationship between the physical structure and optical properties. Then, we fabricated different colors and expected color pattern by widening the pore diameter of NAA. Numerical and experimental study shows that the colors can cover the whole visible range by widening the pore diameter. This work can not only lead to better understanding of the mechanism of tuning color on NAA film, but also help us to fabricate expected color in the whole light range.

Photoswitchable Membranes Based on Peptide‐Modified Nanoporous Anodic Alumina: Toward Smart Membranes for On‐Demand Molecular Transport

2015 ◽  
Vol 27 (19) ◽  
pp. 3019-3024 ◽  
Author(s):  
Tushar Kumeria ◽  
Jingxian Yu ◽  
Mohammed Alsawat ◽  
Mahaveer D. Kurkuri ◽  
Abel Santos ◽  
...  
Keyword(s):  
Molecular Transport ◽  
Anodic Alumina ◽  
Nanoporous Anodic Alumina ◽  
On Demand

New 8-oxo-7,8-2´deoxyguanosine nanoporous anodic alumina aptasensor for colorectal cancer diagnosis in blood and urine

Nanoscale ◽  
2021 ◽  
Author(s):  
Luis Pla ◽  
Felix Sancenón ◽  
M.Carmen Martinez-Bisbal ◽  
Celia Banuls ◽  
Nuria Estañ ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Colorectal Cancer ◽  
Cancer Diagnosis ◽  
Anodic Alumina ◽  
Human Diseases ◽  
Nanoporous Anodic Alumina

Many important human diseases, and specially cancer, have been related to the overproduction of 8-oxo-7,8-dihydro-2´-deoxyguanosine (8-oxo-dG). This molecule is a product of oxidative stress processes over nucleophilic bases in DNA....

Thin nanoporous anodic alumina film on aluminium for passive radiative cooling

Pramana ◽  
2021 ◽  
Vol 95 (1) ◽  
Author(s):  
Jitendra K Pradhan ◽  
Dheeraj Pratap ◽  
S Anantha Ramakrishna
Keyword(s):  
Anodic Alumina ◽  
Radiative Cooling ◽  
Alumina Film ◽  
Nanoporous Anodic Alumina ◽  
Anodic Alumina Film

scholarly journals Spatially Ordered Matrix of Nanostructured Tin–Tungsten Oxides Nanocomposites Formed by Ionic Layer Deposition for Gas Sensing

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4169
Author(s):  
Gennady Gorokh ◽  
Natalia Bogomazova ◽  
Abdelhafed Taleb ◽  
Valery Zhylinski ◽  
Timur Galkovsky ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Gas Sensing ◽  
Oxide Films ◽  
High Sensitivity ◽  
Anodic Alumina ◽  
Film Deposition ◽  
Silicon Substrates ◽  
Layer By Layer ◽  
Gas Sensitivity ◽  
Nanoporous Anodic Alumina

The process of layer-by-layer ionic deposition of tin-tungsten oxide films on smooth silicon substrates and nanoporous anodic alumina matrices has been studied. To achieve the film deposition, solutions containing cationic SnF2 or SnCl2 and anionic Na2WO4 or (NH4)2O·WO3 precursors have been used. The effect of the solution compositions on the films deposition rates, morphology, composition, and properties was investigated. Possible mechanisms of tin-tungsten oxide films deposition into the pores and on the surface of anodic alumina are discussed. The electro-physical and gas-sensitive properties of nanostructured SnxWyOz films have been investigated. The prepared nanocomposites exhibit stable semiconductor properties characterized by high resistance and low temperature coefficient of electrical resistance of about 1.6 × 10−3 K−1. The sensitivity of the SnxWyOz films to 2 and 10 ppm concentrations of ammonia at 523 K was 0.35 and 1.17, respectively. At concentrations of 1 and 2 ppm of nitrogen dioxide, the sensitivity was 0.48 and 1.4, respectively, at a temperature of 473 K. At the temperature of 573 K, the sensitivity of 1.3 was obtained for 100 ppm of ethanol. The prepared nanostructured tin-tungsten oxide films showed promising gas-sensitivity, which makes them a good candidate for the manufacturing of gas sensors with high sensitivity and low power consumption.

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