Penn State researchers develop microscopic 2D thermometers for direct on-chip processor monitoring

Penn State researchers develop ultra-thin 2D material thermometers that fit on computer chips to monitor transistor heat in real-time with high efficiency.

By: AXL Media

Published: Mar 6, 2026, 6:50 AM EST

Source: The information in this article was sourced from Penn State

The Challenge of Modern Chip Overheating

As modern computer processors become increasingly crowded with billions of transistors, heat management has become a critical bottleneck for performance. When transistors overheat, they suffer from significant drops in efficiency and speed. Historically, monitoring these temperatures has been difficult because traditional sensors are too bulky to be placed directly on the chip surface, leading to lag times and inaccurate readings from external sensors. To bridge this gap, Penn State researchers developed a sensor smaller than an ant’s antenna that can be integrated directly into the silicon architecture.

Utilizing Bimetallic Thiophosphates

The breakthrough relies on a specialized class of two-dimensional (2D) materials known as bimetallic thiophosphates. These materials are only a few atoms thick, allowing the team to shrink the sensor to just one square micrometer. Unlike traditional silicon-based sensors, bimetallic thiophosphates possess unique properties that allow ions to move effectively even under electrical current. This high sensitivity to heat allows the material’s physical properties to adjust dynamically, providing a "strong temperature dependence" that makes it an ideal candidate for thermal sensing at a microscopic scale.

Ion-Electron Coupling for Speed and Efficiency

The sensor operates through a process called "coupling," which links the movement of ions and electrons. While industry usually tries to eliminate ions from transistors to improve power, the Penn State team utilized these heat-sensitive particles to their advantage. The ions detect the temperature changes, and the electrons read and transmit that thermal data using the same electrical currents already powering the chip. This design allows the sensors to detect subtle temperature variations in just 100 nanoseconds—millions of times faster than a human blink—without requiring extra circuitry or signal converters.