Feasibility studies on si-based biosensors

Area of Science:

• Materials Science
• Biotechnology
• Electrical Engineering

Background:

• Silicon-based biosensors offer potential for advanced diagnostics.
• Effective immobilization of biological elements is crucial for biosensor performance.
• Existing methods require optimization for integration with microelectronic fabrication.

Purpose of the Study:

• To review the fabrication of silicon-based biosensors developed by researchers in Catania.
• To detail the optimization of a covalent immobilization protocol for biological sensing elements.
• To evaluate an electrical transduction mechanism using a MOS-like structure.

Main Methods:

• Development and optimization of a covalent immobilization protocol on SiO(2) surfaces.
• Introduction of an oxide activation step compatible with microelectronic processing.
• Fabrication and testing of a Metal-Oxide-Semiconductor (MOS)-like structure for electrical transduction.

Main Results:

• An optimized immobilization protocol using covalent bonding on SiO(2) was established.
• The oxide activation step significantly improved the immobilization of biological sensing elements.
• Experimental results demonstrated the feasibility of electrical transduction in the fabricated MOS-like structure.

Conclusions:

• The study successfully optimized a protocol for fabricating Si-based biosensors.
• The developed methods enable robust immobilization of biological components on silicon platforms.
• This research paves the way for advanced silicon-based biosensing devices.