Imagine building a tower so thin that each floor is just one single atom. That is the kind of structure scientists at the University of Southampton and the National University of Singapore are working with — and they have just found a cleaner way to do it.
Researchers have developed a new technique for assembling materials that are only a few atoms thick. These ultrathin layers, called two-dimensional materials, could one day power faster computers and new quantum devices. But building them has always been messy work. Traditional methods relied on sticky synthetic polymers — essentially plastic-like substances — to hold the atomic layers in place. The problem? Those polymers often left behind invisible traces of gunk that ruined the tiny electronic devices.
The team found a surprising solution: a common mineral called muscovite, or mica. Mica is already used in things like electrical insulation and makeup shimmer. It turns out it works beautifully as a building block for stacking atom-thin layers.
"Our new method allows us to precisely align the layers to create these complex structures that were previously too hard to make," said Dr. Makars Šiškins, a lecturer in experimental physics at the University of Southampton and lead author of the study. "This level of precision is vital for quantum material research, where even a tiny amount of contamination can obscure the results."
When scientists stack these atom-thin materials at just the right angles, strange and useful things happen. The layers can develop new properties — like a form of electricity called superconductivity or special magnetic behavior — that neither layer has alone. These exotic behaviors could lead to powerful new technologies.
Professor Alexey Berdyugin from the National University of Singapore, who co-led the research, explained why mica makes such a difference. "Because mica is an inorganic crystal, rather than a soft polymer, it avoids many of the contamination issues that plague conventional methods," he said. "It also produces ultra-clean surfaces, allowing the electronic components to function at their full potential."
The technique, published in the journal Nature Communications, makes the assembly process both cleaner and cheaper. Scientists see it as a critical step toward developing faster, more reliable microchips and eventually making quantum computing practical. Berdyugin believes it could unlock the full potential of these advanced materials.
For the scientists, the hunt for cleaner building methods is more than a technical puzzle — it is a gateway to breakthroughs that could reshape technology as we know it.