Biomaterial-Based Biomimetic Visual Sensors: Inkjet Patterning of Bacteriorhodopsin.

Area of Science:

• Biomaterials Science
• Sensor Technology
• Optoelectronics

Background:

• Bacteriorhodopsin (bR) is a light-sensitive protein with potential for biomimetic sensor applications.
• Traditional fabrication methods for bR-based sensors can be limiting in terms of patterning and control.
• Developing energy-efficient visual sensors is crucial for advanced information processing.

Purpose of the Study:

• To fabricate biomimetic visual sensors using bacteriorhodopsin (bR) via an inkjet printing method.
• To investigate the photocurrent response and control capabilities of inkjet-printed bR films.
• To demonstrate the application of this technique in creating functional visual filters for image processing.

Main Methods:

• Fabrication of bR films using an inkjet printing method for precise deposition.
• Characterization of time-differential photocurrent response of the printed bR films.
• Design and fabrication of two-dimensional Difference of Gaussian (DOG) and Gabor filters using inkjet printing.

Main Results:

• Inkjet-printed bR films exhibited photocurrent responses comparable to dip-coated films.
• Photocurrent intensity was controllable by adjusting the number of printed bR layers.
• Successfully fabricated DOG filters for edge detection and Gabor filters for object detection (size, motion, orientation).

Conclusions:

• Inkjet printing is a viable and versatile method for fabricating highly functional biomaterial-based visual sensors.
• These bR-based sensors offer energy-efficient, real-time visual information processing capabilities.
• The developed technique holds significant potential for widespread implementation in advanced visual sensing applications.