Near-Infrared Triggered Degradation for Transient Electronics.

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Transient electronics offer unique applications in medicine and consumer products.
• Current transient electronics face challenges with controlled, on-demand disintegration, especially for internal medical use.
• Implantable medical devices (IMDs) often require secondary surgeries for removal, posing risks and increasing costs.

Purpose of the Study:

• To develop a method for triggering the disintegration of transient electronics using near-infrared (NIR) light.
• To enable on-demand degradation of implantable medical devices (IMDs) without surgical intervention.
• To explore the potential of NIR light-triggered transient electronics for advanced medical applications.

Main Methods:

• Utilized metastable cyclic poly(phthalaldehyde) (cPPA) polymers for encapsulation.
• Employed bioresorbable metals, such as molybdenum (Mo), to convert NIR light into heat.
• Investigated the effect of laser power and exposure time on degradation rates.

Main Results:

• Achieved rapid degradation of the cPPA encapsulation layer in approximately 1 minute.
• Demonstrated that the degradation rate is controllable via laser power and exposure time.
• Showcased the conversion of NIR light to heat for triggering polymer transition.

Conclusions:

• Near-infrared (NIR) light can effectively trigger the transition and degradation of cPPA polymers.
• This NIR-triggered system offers a novel approach for on-demand disintegration of transient electronics.
• The deep penetration of NIR light makes this technology highly promising for implantable medical devices (IMDs).