2014
DOI: 10.1186/1556-276x-9-124
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Study of zeolite influence on analytical characteristics of urea biosensor based on ion-selective field-effect transistors

Abstract: A possibility of the creation of potentiometric biosensor by adsorption of enzyme urease on zeolite was investigated. Several variants of zeolites (nano beta, calcinated nano beta, silicalite, and nano L) were chosen for experiments. The surface of pH-sensitive field-effect transistors was modified with particles of zeolites, and then the enzyme was adsorbed. As a control, we used the method of enzyme immobilization in glutaraldehyde vapour (without zeolites). It was shown that all used zeolites can serve as a… Show more

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Cited by 21 publications
(13 citation statements)
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“…The sensitivities of the biosensors decreased in the order of BEA-Gold > BEA > nano BEA > Silicalite > GA. BEA zeolites, having aluminium inside, regardless of its particle size, gave higher response than silicalite which has no aluminium in its structure. This result is consistent with our previous results showing that the sensitivity of urease biosensor based on ISFET developed by nano BEA coating is higher compared to silicalite-coated one [ 20 ] and the same trend was observed for amperometric glucose biosensor [ 22 ]. This result can be attributed to the presence of aluminium in zeolite BEA and nano BEA, providing both hydrophilicity and Brønsted acid sites (Si–OH–Al) which are strongly effective in protein adsorption [ 35 , 36 ].…”
Section: Resultssupporting
confidence: 93%
See 1 more Smart Citation
“…The sensitivities of the biosensors decreased in the order of BEA-Gold > BEA > nano BEA > Silicalite > GA. BEA zeolites, having aluminium inside, regardless of its particle size, gave higher response than silicalite which has no aluminium in its structure. This result is consistent with our previous results showing that the sensitivity of urease biosensor based on ISFET developed by nano BEA coating is higher compared to silicalite-coated one [ 20 ] and the same trend was observed for amperometric glucose biosensor [ 22 ]. This result can be attributed to the presence of aluminium in zeolite BEA and nano BEA, providing both hydrophilicity and Brønsted acid sites (Si–OH–Al) which are strongly effective in protein adsorption [ 35 , 36 ].…”
Section: Resultssupporting
confidence: 93%
“…We have previously shown the development of new methods for potentiometric [ 20 , 21 ], amperometric [ 22 ] and conductometric [ 8 , 23 ] transducers based on immobilization of enzymes on zeolites. In our recent study, owing to the unique advantages such as easiness, fastness, inexpensiveness and ability to analyse the biological content as electrical signal of electrochemical biosensors with an additional advantage of miniaturized silicon-based semiconductor nature of field-effect transistor (FET)-based sensors, we have developed a novel approach for constructing an ion selective field-effect transistor (ISFET) device for creatinine monitoring using silicalite [ 24 ].…”
Section: Introductionmentioning
confidence: 99%
“…Recently, potentiometric biosensors prepared adsorbing urease on different zeolite (silicalite, nano beta zeolite, and zeolite L) monolayers were reported by Shelyakina et al . [301]. The zeolite substrates were obtained by immobilizing the zeolite particles onto the surface of pH-sensitive field-effect transistors (ISFET).…”
Section: Adsorbedproteinsmentioning
confidence: 99%
“…An idea of enzyme adsorption on zeolites has been proposed in previous work [ 5 ]. Currently, a number of biosensors based on various types of zeolites have been developed using different enzyme systems: urease [ 6 11 ], glucose oxidase [ 12 14 ], acetylcholinesterase [ 15 ], butyrylcholinesterase [ 16 , 17 ], invertase/mutarotase/glucose oxidase [ 18 ], etc.…”
Section: Introductionmentioning
confidence: 99%