A new tool allows atomic 3D printing
A new tool now rests in the 3D printing toolbox. The electron beam in a scanning transmission electron microscope has been exquisitely controlled with specially programmed electronics to tunnel into non-crystalline material and construct 3D features that are in perfect alignment with the underlying substrate (i.e., epitaxial). The result is designer materials with desirable structures, such as microchips, or materials with unique properties. Essentially, any shape can be created by exposing patterned areas to higher numbers of electrons than non-patterned areas, resulting in epitaxial 3D features down to 1-2 nanometers — less that the width of a strand of DNA.
Electron microscopes with atomically focused beams, even from older instruments, can easily be transformed from characterization tools to nanoscale fabrication platforms, complementing macroscopic 3D printing. This nanoscale fabrication tool could be used to make integrated circuits and non-equilibrium systems such as strategically concentrated impurities in crystals that lead to unique properties.
3D printing has revolutionized the way we can make and design materials. Now a team led by scientists at Oak Ridge National Laboratory has added another tool to the 3D printing toolbox. Combining the focused electron beam in a scanning transmission electron microscope with new electronic controls allowed the atomic sculpting of crystalline material from non-crystalline material and the construction of 3D feature sizes down to 1-2 nanometers. The crystalline features have a particular alignment with the underlying atoms, allowing mechanical and electrical properties to extend throughout the material.
The electron beam from the scanning transmission electron microscope sculpted with atomic precision a crystalline oxide feature from a non-crystalline oxide layer on a crystalline substrate. Interestingly, this non-crystalline oxide layer was made by a usually undesirable process: While preparing a sample for the electron microscope, significant redeposition of the initially crystalline substrate occurs. This redeposited material is non-crystalline and is on top of the initial crystalline film. The electron beam can then sculpt and crystallize this non-crystalline material. Also, in order to achieve this atomic manipulation, scientists had to custom program external electronics to control the trajectory of the electron beam. Electrons hitting the non-crystalline material induce growth of crystalline nanostructures.
The number of electrons hitting the sample controlled the growth rate of the 3D feature from the non-crystalline material. At lower electron beam intensities, the material can be imaged without inducing growth. Nanofabrication with atomic-level sculpting can lead to new 3D materials for integrated circuits as well as new fundamental experimental studies ranging from crystallization to diffusion that can complement modeling and simulation.
Learn more: Atomic Sculpting with a Microscope
The Latest on: 3D nanoprinting
via Google News
The Latest on: 3D nanoprinting
- Microscopic 3D-printed sensors to detect hazardous gases and vapourson December 2, 2021 at 2:47 am
The ChemLife (Artificial micro-vehicles with life-like behaviour) project runs until September 2023. The 5D NanoPrinting (Functional & Dynamic 3D Nano- MicroDevices by Direct Multi-Photon Lithography) ...
- 3D laser nanoprinters become compacton November 30, 2021 at 10:28 am
Researchers of the Cluster of Excellence 3D Matter Mode to Order show how 3-dimensional nanostructures can be printed using compact desktop devices – publication in Nature Photonics Lasers in ...
- 3D laser nanoprinters become compacton November 30, 2021 at 4:34 am
More information: Vincent Hahn et al, Two-step absorption instead of two-photon absorption in 3D nanoprinting, Nature Photonics (2021). DOI: 10.1038/s41566-021-00906-8 Journal information: Nature ...
- Compact 3D laser nanoprinters for the desktopon November 30, 2021 at 12:41 am
As a result, much smaller printers can be used. This work is reported in Nature Photonics ("Two-step absorption instead of two-photon absorption in 3D nanoprinting"). Electron microscopic ...
- 3D laser nanoprinters become compacton November 29, 2021 at 3:59 pm
Two-step absorption instead of two-photon absorption in 3D nanoprinting. Nature Photonics , 2021; 15 (12): 932 DOI: 10.1038/s41566-021-00906-8 Cite This Page : ...
- 3D printing approaches atomic dimensionson November 21, 2021 at 9:14 pm
In recent years 3D printing, also known as additive manufacturing, has established itself as a promising new manufacturing process for a wide variety of components. Dr Dmitry Momotenko, a chemist ...
- 3D printing approaches atomic dimensionson November 18, 2021 at 10:01 am
For his nanoprinting technique he uses a solution ... print far smaller metal objects than have ever been printed before. 3D printing using metal powders, for example – a typical method for ...
- 3D printing approaches atomic dimensionson November 18, 2021 at 4:28 am
A new 3D printing technology makes the production ... can control very effectively," says Momotenko. For his nanoprinting technique he uses a solution of positively charged copper ions in a ...
- XTPL sells Delta Printing System to the University of Glasgow, Scotland.on November 5, 2021 at 1:39 am
XTPL develops its proprietary innovative nanoprinting solutions that support those trends ... can be used in electronic connections in advanced integrated circuits, 3D printed electronics, hybrid ...
via Bing News