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Scientists use 3D printing to scale up light, elastic and high-strength nanostructures – 3ders.org (blog)

by • July 18, 2016 • No Comments

Jul 19, 2016 | By Alec

Nanostructures are a thing of a Holy Grail for material engineers. Consisting of synthesized materials of a nanoscale level, they have numerous mechanical, optical, and energy qualities that may theoretically shake up countless industries. Unfortunately, scaling these materials up to a point where you can work with them has been quite challenging. In just of equite instance, this diminishes the material’s structural integrity, uniformity and performance – destroying their desirskill. But 3D printing can be the solution, as researchers of Virginia Tech have just announced a way to that good resultsfully scale up nanostructure materials with a 3D printing device.
This breakthrough has been accomplished by a research team led by Xiaoyu Zheng, the assistant professor of mechanical engineering at Virginia Tech. Their findings have been shared in a paper, entitled Multiscale metallic metamaterials, that has just been published in the Nature Materials journal. In addition included in the team are Virginia Tech graduate research students Huachen Cui and Da Chen, as well as numerous partners of the Lawrence Liveradditional National Laboratory (LLNL). The study itself was conducted with assist of the LLNL, the SCHEV fund of the say of Virginia, and the Defense Advanced Research Projects agency.
As the researchers explain, they have pioneered a new method for creating metallic nanostructures, that are lightmass, sturdy and highly elastic. This new 3D printing method can in addition be significantly scaled up, through a full sactually orders of magnitude control– reaching the multiple centimeters in size.
Perhaps the most astonishing characteristic of this new 3D printing breakthrough is the striking level of elasticity it accomplishes. For these multiscale metallic materials, consisting of hierarchical 3D architectural arrangements and nanoscale hollow tubes, are additional than 400 percent additional elastic than conventional lightmass metals or ceramic foams. But these multi-leveled hierarchical structures in addition showcase an optimal surface area of nanomaterials, that not just amplifies optical and electrical properties, but in addition empowers photon energy to be collected equitewhere – not just on the top surface like a photovoltaic panel, but inside the lattice structure too.
This should pave the way for numerous applications, and should one of others enable researchers to mimic a far wider range of effortless materials than at any time preceding. Many bone structures, for instance, consist of multiple levels of 3D architectures – of the nanoscale to the macroscale – that researchers have hitherto been unable to fully replicate or control. But any field requiring materials that are stiff, sturdy, lightmass and quite flexible, may in addition benefit of this breakthrough. Obviously this comes with just of any high-tech sector, of the aerospace and car to the medical and military industries.

So how does it work? Essentially, they 3D print hierarchical lattices with nanoscale showcases, building structures that are mirrored at equite scale inside the single object. A digital light 3D printing technique is utilized to overcome the trade-offs between high resolution and turn it into volume, that is frequently seen as the main obstacle to scaling up 3D printed microlattices and nanolattices. “Creation of these materials is enabled by a high-resolution, large-area additive building technique with scalskill not achievable by two-photon polymerization or traditional stereolithography,” the researchers write.
But according to Zheng, especially this skill to 3D print these structures on so most orders of magnitude (of the nanoscale to the centimeters) is revolutionary. “Creating 3D hierarchical micro showcases across the entire sactually orders of magnitude in structural bandwidth in products is unprecedented,” he explained. “Assembling nanoscale showcases into billets of materials through multi-leveled 3-D architectures, you start to see a variety of programmed mechanical properties such as minimal mass, maximum durablity and super elasticity at centimeter scales.”
This stands in stark contrast to other materials that can be generated at nanoscale, such as graphene sheets. But 100 times sturdyer than steel, those graphene properties are approximately completely lost when attempting to scale up the material in three size – that degrades their durablity by up to eight orders of magnitude (building it 100 million times less sturdy).
Whilst the next of this new technique is huge, Zheng and his team are especially considering of building multi-functional inorganic materials (such as metals and ceramics) for quite complex environments. “The increased elasticity and flexibility received through the new system and turn it into come without incorporating soft polymers, thereby building the metallic materials suitable as flexible sensors and electronics in complex environments, where chemical and temperature resistance are required,” Zheng said. Material engineering can nat any time be the same again.

Posted in 3D Printing Application

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Comment wrote at 7/20/2016 10:22:09 AM:
Interesting work. Scalskill of two-photon polymerization is yet higher actually if you take conservative figures like 1cm=10,000,000nm / 500nm = 20,000. Authors claim 16,000 for their method.


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