With the rapid advancement of technology, electronic devices are increasingly demanding lightweight, high-efficiency, and customizable energy-storage solutions. From smartwatches to drones, from wearable devices to intelligent sensors, the “miniaturization” of energy storage has become a key focus in technological R&D. Among numerous emerging materials, MXene has emerged as a rising star thanks to its outstanding conductivity, capacitance, and tunability. However, effectively, stably, and precisely integrating MXene into micrometer-scale manufacturing processes remains a significant challenge. A recently published study in Small Methods has achieved a breakthrough by developing a stable Ti₃C₂Tₓ MXene ink formulation and combining it with aerosol jet printing (AJP) to fabricate high-resolution, high-performance micro-supercapacitors, thereby opening up new possibilities for fields such as microelectronics and energy storage.
The pace of technological obsolescence in electronic devices is staggering, giving rise to an increasingly severe e-waste problem. Conventional environmental-monitoring sensors, particularly temperature–humidity sensors, typically rely on non-degradable plastic substrates—such as PET and PE—and toxic metal materials. Not only are these components difficult to recycle, but their degradation can also release harmful microplastic particles, contaminating the environment. Is it possible to develop sensors that are both high-performing and environmentally friendly—perhaps even virtually “invisible”? A recent study published in Small Methods offers an exciting answer: by leveraging aerosol jet printing (AJP), researchers have successfully fabricated a highly transparent, ultra-compact, and ultra-low-material-consumption integrated temperature–humidity sensor on a biodegradable cellulose substrate. This breakthrough may herald the dawn of the next generation of green electronics.
When you casually discard an electronic sensor, you may not realize that it could persist in the soil for centuries, becoming “e-waste” that pollutes the environment. Today, the global Internet of Things is experiencing explosive growth: by 2025, more than 30 billion devices are expected to be deployed, generating tens of millions of tons of electronic waste each year and depleting critical mineral resources at an accelerating rate. However, a groundbreaking study published in npj Advanced Manufacturing has opened a new door for eco-friendly electronics: a research team from Northwestern University and other institutions has successfully developed fully biodegradable printed electronic sensors using aerosol jet printing. Made entirely from biomass—from the substrate to the ink—these sensors deliver ultra-high performance while naturally decomposing at the end of their lifecycle, truly embodying the principle of “from nature, back to nature.”
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