Seeing Through Muddy Water: Laser-Induced Graphene for Portable Tomography Imaging

Area of Science:

• Materials Science
• Nanotechnology
• Imaging Technology

Background:

• Graphene synthesized via laser scribing on polyimide (PI) possesses excellent physical and chemical properties.
• Laser-induced graphene (LIG) has potential in photothermal applications, antimicrobial surfaces, and electrochemical devices.
• The application of LIG for imaging, particularly in aqueous environments, remains largely unexplored.

Purpose of the Study:

• To propose and demonstrate the use of chemically durable and electrically conductive laser-induced graphene (LIG) for tomography imaging in aqueous suspensions.
• To develop a low-cost, real-time portable imaging prototype utilizing LIG electrodes for four-terminal electrical measurements.
• To showcase the capability of this system to visualize conductive and dielectric objects in both clear and muddy water.

Main Methods:

• Synthesis of graphene on polyimide (PI) using laser scribing to create laser-induced graphene (LIG).
• Fabrication of LIG electrodes designed as impedance imaging units for four-terminal electrical measurements.
• Development of real-time portable imaging prototypes for tomography in aqueous media.
• Utilizing equivalent impedance modeling to interpret imaging data.

Main Results:

• Successful demonstration of tomography imaging in aqueous suspensions using LIG electrodes.
• Clear visualization of conductive and dielectric objects in both clear and muddy water conditions.
• The LIG tomography system overcomes the resolution limitations of traditional visual cameras in turbid water.
• The system offers a low-cost alternative for underwater imaging.

Conclusions:

• Laser-induced graphene (LIG) is a viable and effective material for underwater tomography imaging.
• This graphene-based impedance imaging system provides a significant advantage over conventional methods in challenging aquatic environments.
• The research highlights the potential of graphene nanomaterials for advancing marine technologies, including underwater robotics and automatic fisheries.