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Home Science News Chemistry

Physics-Informed AI Revolutionizes Large-Scale Discovery of Novel Materials

October 10, 2025
in Chemistry
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In a groundbreaking advance that promises to revolutionize the discovery and characterization of new materials, researchers from KAIST have unveiled an innovative approach that synergizes the foundational principles of physics with cutting-edge artificial intelligence techniques. This novel methodology, leveraging Physics-Informed Machine Learning (PIML), transcends traditional experimental limitations by enabling accurate material property identification from minimal and noisy datasets, thus streamlining research in fields as diverse as materials science, mechanical engineering, energy harvesting, and electronics.

At the core of this pioneering work is the integration of physical laws directly into the AI learning algorithm, allowing the model to “understand” the intrinsic governing equations that dictate material behaviors. Conventional methods have long depended on extensive empirical data and complex testing apparatus to infer material properties, often leading to prohibitive costs and time delays. By contrast, the KAIST-led initiative bypasses these obstacles through algorithms that embed conservation laws and thermodynamic principles, rendering neural networks capable of extrapolating reliable material characteristics even when experimental data are scarce or incomplete.

The research team initially concentrated on hyperelastic materials, such as rubbers and elastomers, which exhibit complex, nonlinear deformation under stress. Using a Physics-Informed Neural Network (PINN), the researchers demonstrated the capability to infer constitutive models—mathematical descriptions of material stress-strain relationships—from highly limited experimental data, essentially from a single test. This approach overturns the long-held assumption that large, comprehensive datasets are mandatory for accurate constitutive modeling, illustrating that the interplay of physics and machine learning can compensate for data paucity while maintaining predictive fidelity.

Expanding their frontier, the group then addressed thermoelectric materials, a class critical to sustainable energy technologies due to their ability to convert thermal gradients into electrical energy and vice versa. Through a novel inverse inference technique based on PINNs, the team successfully estimated key temperature-dependent thermoelectric parameters, such as thermal conductivity and the Seebeck coefficient, from just a handful of measurements. This advancement is crucial for accelerating the screening and optimization of thermoelectric materials, which traditionally rely on cumbersome and time-intensive experimental characterization.

Perhaps most impressively, the researchers introduced the concept of Physics-Informed Neural Operators (PINO), an AI architecture that generalizes physical insights across different material systems without requiring re-training on each new material. This means that after training the model on a relatively small set of 20 materials, it was tested on 60 entirely novel materials and achieved exceptionally accurate property predictions. Such scalability and generality herald a transformative platform for large-scale materials discovery, allowing for rapid, high-throughput evaluation that was previously unattainable.

This fusion of physics-based understanding with AI-driven inference marks a paradigm shift. It not only reduces the dependency on expensive and time-consuming experimentation but also ensures that predictions remain physically consistent and interpretable. The approach thus bridges the gap between purely data-driven AI models, which may lack transparency, and mechanistic physical models, which can be intractable for complex materials behavior.

Professor Seunghwa Ryu, who guided these studies, encapsulates the significance of this breakthrough: “This is the first instance where AI embedded with physical laws is employed in real material research. It enables dependable identification of material properties under constrained data conditions, offering vast potential for expansion into multiple engineering domains.” The approach is set to expedite materials innovation pipelines, essential for developing next-generation composites, electronics, and energy devices.

These findings were disseminated across two critical publications. The first study, detailing the discovery of hyperelastic constitutive models from extremely sparse data, appeared in the August 13 issue of Computer Methods in Applied Mechanics and Engineering and was co-first-authored by Ph.D. candidates Hyeonbin Moon and Donggeun Park. The second, focusing on label-free inference of temperature-dependent thermoelectric properties via physics-informed neural operators, was published on August 22 in npj Computational Materials, co-led by Moon, Songho Lee, and Dr. Wabi Demeke.

Financial support for these projects was provided through competitive grants from the Korea Research Foundation and the Ministry of Science and ICT’s INNOCore Program, evidencing governmental commitment to fostering innovation at the nexus of AI and materials science. Collaboration extended beyond KAIST, involving Kyung Hee University and the Korea Electrotechnology Research Institute, reflecting the interdisciplinary and inter-institutional nature of modern scientific advancement.

The impact of these technologies is poised to be far-reaching. By enabling AI models to encode and apply physical laws inherently, researchers can venture beyond empirical limitations, accessing a virtual experimentation environment that accelerates hypothesis testing and material discovery across different length scales and material classes. This capability is particularly valuable as the quest for materials with tailored properties—whether for flexible electronics, sustainable energy solutions, or advanced structural components—becomes increasingly urgent.

Moreover, this scientific milestone addresses one of the longstanding challenges in the application of AI to scientific research: the trade-off between data availability and model reliability. The KAIST team’s success in deploying PIML and PINO frameworks puts forth a robust methodology where the physics-informed constraints act as regularizers, reducing overfitting and enhancing the physical interpretability of the models, a crucial factor for trust in AI-augmented materials engineering.

In practice, the potential extends to developing “digital twins” of materials, virtual counterparts that mirror real material behavior under varying conditions, enabling predictive maintenance and in silico testing. This marriage of physics-informed AI and materials science could thus dramatically lower costs and risks associated with innovation pipelines, catalyzing the creation of novel materials with optimized performance tailored precisely to application needs.

As the landscape of materials research evolves, this research represents a beacon pointing towards a future where AI and physics coexist symbiotically, replacing brute-force experimentation with intelligent, law-abiding computation. The strides achieved by Professor Ryu’s group and collaborators underscore the transformative potential inherent to such integrative approaches, opening avenues that transcend traditional boundaries and herald a new era of accelerated discovery in science and engineering.

Subject of Research: Physics-informed AI methods for material property identification under limited data conditions.

Article Title: “Physics-informed neural operators for generalizable and label-free inference of temperature-dependent thermoelectric properties”

News Publication Date: October 2, 2025

Web References:
– DOI: https://doi.org/10.1038/s41524-025-01769-1

Image Credits: KAIST

Keywords

Applied sciences and engineering, Engineering, Physics-Informed Machine Learning, Material Discovery, Thermoelectric Materials, Hyperelasticity, Neural Networks, Artificial Intelligence, Computational Materials Science, Physics-Informed Neural Operators

Tags: advanced computational materials researchAI in materials sciencedata-driven material characterizationenergy harvesting technologieshyperelastic materials researchintegrating physics and AImaterial property identificationmechanical engineering innovationsneural networks in engineeringnovel materials discoveryovercoming experimental limitationsphysics-informed machine learning
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