Asieh Ahmadalinezhad

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In this work, we have directly grown three-dimensional nanoporous Au networks onto a Ti substrate using the hydrothermal technique. This newly designed material with a large surface area was used as a supporting matrix for immobilizing a redox protein, hemoglobin (Hb), to develop a high-performance hydrogen peroxide biosensor. Scanning electron microscope(More)
Através de nossos estudos, encontramos que N-(2-furilmetileno) piridina-2,6-diamina (FPD) pode ser usado como um excelente ionóforo na construção de um novo sensor baseado em membrana de poli(vinil cloreto) (PVC). Uma composição para a membrana, de 33% de PVC, 59% de nitrobenzeno (NB), 6% de FPD e 2% de borato de potássio tetrakis (p-clorofenil) (KTpClPB),(More)
The oxidative degradation of CO2 adsorbents consisting of amine-grafted pore-expanded mesoporous MCM-41 silica was investigated. The adsorbents were treated under flowing air at various temperatures, and the degree of deactivation was evaluated through the measurement of their CO2 adsorption capacity prior and subsequent to exposure to air. To decipher the(More)
The oxidative degradation of polyethylenimine-impregnated mesoporous SBA-15 silica for CO2 capture was investigated at the molecular level. The adsorbents were exposed to flowing air at different temperatures, and their degree of deactivation was evaluated through the measurement of CO2 adsorption capacity prior and subsequent to air exposure. A(More)
We report on a highly sensitive electrochemical biosensor for the determination of total cholesterol. The novel biosensor was fabricated by co-immobilizing three enzymes, cholesterol oxidase (ChO(x)), cholesterol esterase (ChE) and horseradish peroxidase (HRP), on nanoporous gold networks directly grown on a titanium substrate (Ti/NPAu/ChO(x)-HRP-ChE). The(More)
Here we report on a novel platform based on buckypaper for the design of high-performance electrochemical biosensors. Using glucose oxidase as a model enzyme, we constructed a biocompatible mediator-free biosensor and studied the potential effect of the buckypaper on the stability of the biosensor with both amperometry and FTIR spectroscopy. The results(More)
A facile and highly efficient method was developed for the preconcentration of the ultra trace amounts of mercury (II) ions. Octadecyl silica membrane disk was modified by the recently synthesized triazene ligand, 1,3-bis(2-ethoxyphenyl)triazene (EPT), and cold vapor atomic absorption spectrometry was used to determine the resultant preconcentrated Hg(II)(More)
A simple, reliable and rapid method for preconcentration and determination of the ultra trace amount of silver using octadecyl silica membrane disk modified by a recently synthesized triazene ligand, 1,3-bis(2-cyanobenzene)triazene (CBT), and flame atomic absorption spectrometry is presented. Various parameters including pH of aqueous solution, flow rates,(More)
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