Laser‐Induced, Green and Biocompatible Paper‐Based Devices for Circular Electronics

Abstract

The growing usage and consumption of electronics-integrated items into the daily routine has raised concerns on the disposal and proper recycling of these components. Here, a fully sustainable and green technology for the fabrication of different electronics on fruit-waste derived paper substrate, is reported. The process relies on the carbonization of the topmost surface of different cellulose-based substrates, derived from apple-, kiwi-, and grape-based processes, by a CO 2 laser. By optimizing the lasing parameters, electronic devices, such as capacitors, biosensors, and electrodes for food monitoring as well as heart and respiration activity analysis, are realized. Biocompatibility tests on fruit-based cellulose reveal no shortcoming for onskin applications. The employment of such natural and plastic-free substrate allows twofold strategies for electronics recycling. As a first approach, device dissolution is achieved at room temperature within 40 days, revealing transient behavior in natural solution and leaving no harmful residuals. Alternatively, the cellulose-based electronics is reintroduced in nature, as possible support for plant seeding and growth or even soil amendment. These results demonstrate the realization of green, low-cost and circular electronics, with possible applications in smart agriculture and the Internet-of-Thing, with no waste creation and zero or even positive impact on the ecosystem.

Toward Sustainable Haptics: A Wearable Vibrotactile Solar‐Powered System with Biodegradable Components

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Commercial-Grade Dielectrics Surface Metallization by Direct Laser Deposition from Deep Eutectic Solvents

“…Among the various plating techniques, laser-assisted metallization is considered a promising approach for metallization on both common surfaces, such as polyimide, and challenging surfaces, such as PTFE. When compared with other microfabrication techniques, such as photolithography, , inkjet printing, and screen printing, DLW offers several advantages, including high spatial resolution, environmental friendliness, fast processing rate, and the capability to metallize a wide range of materials, such as glass, , polymers, , paper, and other delicate carbon-based materials . Laser-assisted metallization has demonstrated flexibility, effectiveness, and ability to produce sophisticated and complex structures with high reproducibility.…”

MXene Nanosheets-Decorated Paper as a Green Electronics Material for Biosensing

“…Consumers’ growing interest in purchasing new electronic products plays a pivotal role in the rapid expansion of the world’s fastest-increasing waste streamelectronic waste. This escalating issue has become an environmental hazard due to its toxic legacy. , In recent times, an increasing spotlight has been cast on the emergence of green electronics. − The emerging field of green electronics is focused on designing and manufacturing electronic devices that have a minimal impact on the environment. Across the globe, researchers and scientists are actively investigating diverse strategies to attain sustainable and eco-conscious solutions within the realm of electronic device manufacturing.…”