In a significant advance for next-generation electronics, researchers from KAIST, TDS, Hanyang University, and collaborating institutions have demonstrated a method for the deterministic nucleation and controlled growth of two-dimensional (2D) semiconductors. The breakthrough, reported in a recent study, could overcome a major barrier to the industrial adoption of 2D materials in logic and memory devices.
Overcoming the Randomness of Nucleation
2D semiconductors, such as transition metal dichalcogenides (TMDs), are promising candidates for extending Moore's Law beyond the limits of silicon. Their atomically thin nature allows for superior electrostatic control and reduced short-channel effects, making them ideal for scaled transistors. However, producing uniform, single-crystal monolayers over large areas has been a persistent challenge. The root cause is the random, uncontrolled nucleation of crystal growth, which leads to grain boundaries, inconsistent layer thickness, and device-to-device variability.
The new approach achieves deterministic nucleation—precisely placing and initiating crystal seeds at predetermined locations. By decoupling nucleation from subsequent growth, the team was able to guide the formation of high-quality, single-crystalline domains with unprecedented spatial control.
How It Works
While the exact technical details are not fully disclosed in the announcement, the method likely employs a combination of surface engineering and localized energy input to create preferential nucleation sites. This could involve patterned substrates, focused ion beams, or plasmonic heating to lower the nucleation barrier at specific points. Once the seeds are formed, growth conditions are tuned to promote lateral expansion, resulting in seamless monolayers.
This level of control is critical for manufacturing. It enables the precise placement of 2D channels in transistor arrays, eliminates unwanted nucleation that causes polycrystallinity, and opens the door to complex heterostructures and moiré superlattices engineered for quantum and optoelectronic applications.
Implications for 2026 and Beyond
As the semiconductor industry pushes toward the 1 nm node and beyond, 2D materials are increasingly viewed as a necessary evolution. In 2026, we are seeing a surge in research and development aimed at integrating 2D semiconductors into pilot lines. The ability to deterministically nucleate and grow these materials addresses a key manufacturability hurdle.
If scaled, this technique could accelerate the adoption of 2D channels in complementary FETs (CFETs), 3D stacked devices, and even monolithic 3D integration. It also holds promise for flexible electronics and sensors, where precise material placement is equally vital.
Collaborative Effort
The research was a joint effort between KAIST (Korea Advanced Institute of Science and Technology), TDS (likely a specialized research entity or company), Hanyang University, and other partners. This collaboration highlights the global and interdisciplinary nature of advanced semiconductor research, bringing together expertise in materials science, nanotechnology, and device engineering.
Looking Ahead
While the deterministic nucleation method is still in the laboratory stage, its potential is immense. Future work will focus on scaling the process to 300mm wafers, improving growth speed, and integrating with existing CMOS fabrication flows. If successful, it could mark a turning point in the commercialization of 2D semiconductors, enabling the continued miniaturization and performance gains that the industry demands.
For more details, refer to the original research publication from the collaborating institutions.