Achievements
Achievement
In the aerospace sector, the reliability and safety of rocket engines are of paramount importance. Conventional monitoring methods rely on manual inspection, making it difficult to capture structural deformations in high-temperature environments in real time. Recently, a technology known as aerosol jet printing (AJP) was featured in the International Journal of Advanced Manufacturing Technology. Using this technique, scientists have directly printed platinum-nanoparticle-based microsensors onto the surface of rocket engines; these sensors can withstand temperatures as high as 1,290°C, enabling real-time monitoring of structural strain and creep. This article will systematically examine the underlying principles, applications, and future prospects of AJP.
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.”
Have you ever imagined a future where smartphones can be folded like paper and smartwatches can be directly printed onto clothing? Such possibilities are made possible by graphene—a two-dimensional carbon material often hailed as the “king of materials.” However, conventional graphene printing inks typically rely on surfactants or polymers as dispersants; these additives must be removed through high-temperature post-processing, which limits their use on thermally sensitive substrates and hinders the development of diverse flexible electronics manufacturing. A recent breakthrough: scientists from China and Israel have developed a new type of graphene ink! By using polypropylene carbonate (PPC) as the dispersant and pairing it with low-surface-tension solvents, this ink enables the fabrication of high-performance micro-supercapacitors on paper through gentle annealing at just 220°C. Coupled with aerosol jet printing (AJP) technology, complex circuits can now be effortlessly “brought to life” on paper.
With the rapid advancement of microelectronic devices and wearable technologies, on-chip energy-storage components must simultaneously achieve high energy density and compact form factors, making micro-supercapacitors (MSCs) a prime candidate. However, conventional planar electrode architectures suffer from low active-material loading and long ion-transport pathways. Two-dimensional Ti₃C₂Tₓ MXene materials, with their high specific surface area and outstanding electrochemical performance, are an ideal choice for fabricating high-performance MSCs; yet their 3D assembly faces three major challenges: first, the interlayer interactions among MXene nanosheets are limited to weak van der Waals forces and hydrogen bonds, lacking strong interfacial cohesion and thus making it difficult to maintain a stable 3D architecture; second, existing fabrication methods rely on binders and other additives, which can occupy active sites and degrade device performance; and third, conventional 3D-printing techniques suffer from low resolution (typically >40 μm) and a low aspect ratio (generally <0.3), rendering them incapable of producing high-fidelity, complex 3D microstructures. To address these bottlenecks, a team at Carnegie Mellon University in the United States has developed an additive-free aerosol-jetting 3D-printing (AJP) technique that successfully enables the 3D self-supporting assembly of MXene nanosheets. The relevant findings have been published in the journal Small.
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