Current Trends in Nanoporous Anodized Alumina Platforms for Biosensing Applications

Pristine aluminum (Al) has received great deal of attention on fabrication of nanoporous anodized alumina (NAA) with arrays of nanosized uniform pores with controllable pore sizes and lengths by the anodization process. There are many applications of NAA in the field of biosensors due to its numerous key factors such as ease of fabrication, high surface area, chemical stability and detection of biomolecules through bioconjugation of active molecules, its rapidness, and real-time monitoring. Herein, we reviewed the recent trends on the fabrication of NAA for high sensitive biosensor platforms like bare sensors, gold coated sensors, multilayer sensors, and microfluidic device supported sensors for the detection of various biomolecules. In addition, we have discussed the future prospectus about the improvement of NAA based biosensors for the detection of biomolecules.

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Microelectrochemical Smart Needle for Real Time Minimally Invasive Oximetry

Biosensors ◽

10.3390/bios10110157 ◽

2020 ◽

Vol 10 (11) ◽

pp. 157

Author(s):

Daniela Vieira ◽

Francis McEachern ◽

Romina Filippelli ◽

Evan Dimentberg ◽

Edward J Harvey ◽

...

Keyword(s):

Minimally Invasive ◽

Real Time ◽

Surface Area ◽

Electrochemical Detection ◽

Low Cost ◽

High Surface ◽

High Surface Area ◽

Brain Dysfunction ◽

The Brain

A variety of brain disorders such as neural injury, brain dysfunction, vascular malformation, and neurodegenerative diseases are associated with abnormal levels of oxygen. Current methods to directly monitor tissue oxygenation in the brain are expensive and invasive, suffering from a lack of accuracy. Electrochemical detection has been used as an invasiveness and cost-effectiveness method, minimizing pain, discomfort, and injury to the patient. In this work, we developed a minimally invasive needle-sensor with a high surface area to monitor O2 levels in the brain using acupuncture needles. The approach was to directly etch the iron from stainless steel acupuncture needles via a controlled pitting corrosion process, obtaining a high microporous surface area. In order to increase the conductivity and selectivity, we designed and applied for the first time a low-cost coating process using non-toxic chemicals to deposit high surface area carbon nanoparticle, catalytically active laccase, and biocompatible polypyrrole. The physicochemical properties of the materials were characterized as well as their efficacy and viability as probes for the electrochemical detection of PO2. Our modified needles exhibited efficient electrocatalysis and high selectivity toward O2, with excellent repeatability. We well engineered a small diagnostic tool to monitor PO2, minimally invasive, able to monitor real-time O2 in vivo complex environments.

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The effect of Fe on chemical stability and oxygen evolution performance of high surface area SrTix-1FexO3-δ mixed ionic-electronic conductors in alkaline media

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2021.06.088 ◽

2021 ◽

Author(s):

Krystian Lankauf ◽

Aleksander Mroziński ◽

Patryk Błaszczak ◽

Karolina Górnicka ◽

Justyna Ignaczak ◽

...

Keyword(s):

Surface Area ◽

Oxygen Evolution ◽

Chemical Stability ◽

High Surface ◽

High Surface Area ◽

Alkaline Media ◽

Mixed Ionic Electronic Conductors ◽

Electronic Conductors

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Nanostructured materials for CBRNdetection

University of Pitesti Scientific Bulletin - Automotive Series ◽

10.26825/bup.ar.2020.009 ◽

2020 ◽

Vol 30 (1) ◽

pp. 1-8

Author(s):

Alexandru SIRGHIE ◽

◽

Mihai OPROESCU ◽

Gabriel Vasile IANA ◽

Adriana Gabriela PLAIASU

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Surface Area ◽

Nanostructured Materials ◽

High Surface ◽

High Surface Area ◽

Physical And Mechanical Properties ◽

Recent Trends

Nanomaterials are gaining significance in technological applications due to their chemical, physical, and mechanical properties and enhanced performance when compared with their bulkier counterparts. The synthesis of nanostructured materials has led to a significant increase in properties (thermal, optical, electrical, magnetic, mechanical) as well as the discovery of materials with new properties due the fact that at the nanoscale the materials have a high surface area Most applications of nanomaterials in sensors are related to their synthesis. In this paper we report recent trends in applications of various nanomaterials such as nanoparticles, carbon nanotubes, nanowires andgraphene to detect CBRN agents.

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Nanocrystalline Mesoporous γ-Alumina Powders “UPMC1 Material” Gathers Thermal and Chemical Stability with High Surface Area

Chemistry of Materials ◽

10.1021/cm061489j ◽

2006 ◽

Vol 18 (22) ◽

pp. 5238-5243 ◽

Cited By ~ 99

Author(s):

Cédric Boissière ◽

Lionel Nicole ◽

Christelle Gervais ◽

Florence Babonneau ◽

Markus Antonietti ◽

...

Keyword(s):

Surface Area ◽

Chemical Stability ◽

High Surface ◽

High Surface Area ◽

Thermal And Chemical Stability

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Multiscale immobilized lipase for rapid separation and continuous catalysis

New Journal of Chemistry ◽

10.1039/c8nj01950a ◽

2018 ◽

Vol 42 (16) ◽

pp. 13471-13478 ◽

Cited By ~ 7

Author(s):

Weifan Ren ◽

Xu Fei ◽

Jing Tian ◽

Yao Li ◽

Muzi Jing ◽

...

Keyword(s):

Enzymatic Activity ◽

Surface Area ◽

Enzyme Immobilization ◽

Chemical Stability ◽

Immobilized Lipase ◽

High Surface ◽

High Surface Area ◽

Rapid Separation ◽

Inorganic Hybrid ◽

Excellent Chemical

Enzyme–inorganic hybrid nanoflowers have drawn extensive research interest for enzyme immobilization owing to their enhanced enzymatic activity, high surface area, and excellent chemical stability.

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Tenacious Mass Transfer Limitations Drive Catalytic Selectivity during Electrochemical Carbon Dioxide Reduction

10.26434/chemrxiv.7770338.v1 ◽

2019 ◽

Cited By ~ 1

Author(s):

Kailun Yang ◽

Recep Kas ◽

Wilson A. Smith

Keyword(s):

Surface Area ◽

High Surface ◽

High Surface Area ◽

Catalyst Layer ◽

Active Surface ◽

Active Surface Area ◽

High Concentration ◽

Copper Electrodes ◽

Surface Enhanced ◽

Local Current

This study evaluated the performance of the commonly used strong buffer electrolytes, i.e. phosphate buffers, during CO2 electroreduction in neutral pH conditions by using in-situ surface enhanced infrared absorption spectroscopy (SEIRAS). Unfortunately, the buffers break down a lot faster than anticipated which has serious implications on many studies in the literature such as selectivity and kinetic analysis of the electrocatalysts. Increasing electrolyte concentration, surprisingly, did not extend the potential window of the phosphate buffers due to dramatic increase in hydrogen evolution reaction. Even high concentration phosphate buffers (1 M) break down within the potentials (-1 V vs RHE) where hydrocarbons are formed on copper electrodes. We have extended the discussion to high surface area electrodes by evaluating electrodes composed of copper nanowires. We would like highlight that it is not possible to cope with high local current densities on these high surface area electrodes by using high buffer capacity solutions and the CO2 electrocatalysts are needed to be evaluated by casting thin nanoparticle films onto inert substrates as commonly employed in fuel cell reactions and up to now scarcely employed in CO2 electroreduction. In addition, we underscore that normalization of the electrocatalytic activity to the electrochemical active surface area is not the ultimate solution due to concentration gradient along the catalyst layer.This will “underestimate” the activity of high surface electrocatalyst and the degree of underestimation will depend on the thickness, porosity and morphology of the catalyst layer.

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Rugae-like FeP nanocrystal assembly on a carbon cloth: an exceptionally efficient and stable cathode for hydrogen evolution

Nanoscale ◽

10.1039/c5nr02375k ◽

2015 ◽

Vol 7 (25) ◽

pp. 10974-10981 ◽

Cited By ~ 95

Author(s):

Xiulin Yang ◽

Ang-Yu Lu ◽

Yihan Zhu ◽

Shixiong Min ◽

Mohamed Nejib Hedhili ◽

...

Keyword(s):

Gas Phase ◽

Surface Area ◽

Hydrogen Evolution ◽

Hydrogen Generation ◽

High Surface ◽

High Surface Area ◽

Catalytic Efficiency ◽

Carbon Cloth ◽

Nanocrystal Assembly

High surface area FeP nanosheets on a carbon cloth were prepared by gas phase phosphidation of electroplated FeOOH, which exhibit exceptionally high catalytic efficiency and stability for hydrogen generation.

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