A brand new atom-thin carbon membrane developed on the Nationwide College of Singapore may rework proton beams for most cancers remedy and enhance next-gen vitality gadgets, electronics, and molecular filtration applied sciences.
Only one atom thick, the ultra-clean monolayer amorphous carbon (UC-MAC) may outperform current supplies like graphene. It permits for a lot finer management over subatomic particles, significantly protons, which could allow safer, extra exact most cancers remedies utilizing proton remedy.
Revealed in Nature Nanotechnology, the examine describes how the membrane’s porous construction reduces proton scattering, permitting sharper, extra centered beams. That’s important for proton remedy, which targets tumors with high-energy particles whereas sparing wholesome tissue.
A New Class of 2D Carbon
Not like graphene’s orderly honeycomb lattice, UC-MAC is made up of a sophisticated combination of ultra-thin, disordered carbon rings with 5, six, and 7 members.
This atomic-level, “structured” dysfunction types angstrom-sized pores, roughly one ten-billionth of a meter large. UC-MAC might be tuned to filter or direct tiny particles similar to protons and molecular hydrogen ions (H2+) as they move by the fabric.
The result’s a membrane that not solely performs higher than graphene or industrial carbon movies, however can be a lot thinner and extra selective. When examined by the researchers, UC-MAC lower undesirable proton scattering by almost half in comparison with graphene, and by an element of 40 in comparison with typical carbon movies.
Obstacles and Improvements
Regardless of its potentialities, producing it at scale has prevented this materials from widespread implementation. Producing UC-MAC is a gradual, costly course of that steadily introduces metallic impurities, degrading the fabric’s efficiency.
To unravel this, the NUS staff developed a fast new fabrication technique referred to as the “disorder-to-disorder” (DTD) method. Utilizing plasma-enhanced chemical vapour deposition, they created an 8-inch sheet of UC-MAC in seconds, with out detectable metallic contamination.
Whereas UC-MAC’s rapid promise lies in oncology, its potential functions prolong a lot additional. Its extremely managed porous construction makes it perfect for vitality storage gadgets like batteries and gasoline cells, in addition to for catalysis and molecular separation.
The semiconducting properties of UC-MAC movies additionally make them promising candidates for ultra-thin electronics, significantly for sub-2 nm built-in circuits—a important frontier within the post-Moore’s legislation period.
Jiong Lu, Affiliate Professor, Nationwide College of Singapore
By combining atomic precision with a quick, scalable manufacturing technique, the staff has taken an enormous step ahead for the real-world adoption of a cloth that might speed up applied sciences dramatically.
Journal Reference
Lin, H., et al. (2025). Ultraclean monolayer amorphous carbon yields a high-precision proton beam. Nature Nanotechnology. doi.org/10.1038/s41565-025-01968-3.