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Home Sensors Miniature Biosensor Based on Carbon Nanotubes

Miniature Biosensor Based on Carbon Nanotubes

Description

The unique physical and chemical properties of carbon nanotubes open possibilities for creating a new miniature chemical/biological sensor. This biosensor is under development. It will be based on semiconducting single-walled nanotubes. Using small-diameter (0.6 - 1.1 nm) nanotubes, NIR luminescence originates in the spectral range 0.9 - 1.2 mkm, which can be monitored by a conventional low-cost CCD matrix or photomultiplier. In this spectral range human tissues are optically transparent and a sensor can be implanted into the body.

The key element in creating such sensors is elaboration of interfaces between the nanotubes and the recognition biosystem, enzymes (glucose oxidase or lactate oxidase). To avoid the loss of intrinsic nanotube properties upon chemical modification aimed at efficient enzyme immobilization, a noncovalent nanotube functionalization will be applied, and the relevant chemical compounds will be synthesized.

Miniature Biosensor Based on Carbon Nanotubes
Fig. 1 Miniature Biosensor Based on Carbon Nanotubes

Stage of Development

The results of the team’s current activities will be the development of a highly sensitive low-cost biosensor for glucose detection in blood and lactate in human saliva.

Contact Details

Dr. Victor A. Karachevtsev
Institute for Low Temperature Physics & Engineering, Kharkiv

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