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Selected Publications
Selected Publications
Notes: # indicates equally contributing first authors. * indicates the corresponding author(s).
Surjadi, J.U., Aymon, B.F.G., Carton, M.A., Portela, C.M*. (2025). Double-network-inspired mechanical metamaterials. Nature Materials 24, 945–954
Surjadi, J.U., Aymon, B.F.G., Carton, M.A., Portela, C.M*. (2025). Double-network-inspired mechanical metamaterials. Nature Materials 24, 945–954
(Front Cover)
(Front Cover)
Inspired by double-network hydrogels, we developed 3D microarchitected materials that integrate stiff and compliant elements to achieve an unusual combination of high strength and exceptional stretchability—properties that are rarely found together in engineered systems.
Featured in MIT News, Forbes, NASA Tech Briefs, Science Daily, EurekAlert!, TechXplore, Mirage News, Tech Explorist, Scienmag, and several other media outlets
Surjadi, J.U., Portela, C.M*. (2025). Enabling 3D architected materials across length and time scales. Nature Materials 24, 493-505
Surjadi, J.U., Portela, C.M*. (2025). Enabling 3D architected materials across length and time scales. Nature Materials 24, 493-505
We present our vision on the future of 3D architected materials and promising routes to bridge the gap to real-world engineering applications.
Featured in MIT News, Phys.org, Mirage News, Tech Explorist, and several other media outlets
Surjadi, J.U.#, Wang, L.#, Qu, S., Aymon, B.F.G., Ding, J., Yang, H., Fan, R., Zhao, Q., Song, X., and Lu, Y*. (2025). Exploiting multiscale dynamic toughening in multicomponent alloy metamaterials for extreme impact mitigation. Science Advances 11, eadt0589
Surjadi, J.U.#, Wang, L.#, Qu, S., Aymon, B.F.G., Ding, J., Yang, H., Fan, R., Zhao, Q., Song, X., and Lu, Y*. (2025). Exploiting multiscale dynamic toughening in multicomponent alloy metamaterials for extreme impact mitigation. Science Advances 11, eadt0589
(Front Cover)
(Front Cover)
We employed a custom-built high-resolution selective laser melting (HR-SLM) system to fabricate centimeter-scale, lightweight CoCrNi medium-entropy alloy (MEA) microlattices with sub-100 µm features. These architected materials exhibit ultrahigh energy dissipation across seven orders of magnitude in strain rate, outperforming previously reported metallic materials and microlattices.
Wang, L.#, Yin, D.#, Surjadi, J.U.#, Ding, J., Fu, H., Zhou, X.*, Li, R., Xiong, T., Song, X., Ho, J.C., and Lu, Y*. (2025). Harnessing screw dislocations in shell-lattice metamaterials for efficient, stable electrocatalysts. Nature Communications 16, 7273
Wang, L.#, Yin, D.#, Surjadi, J.U.#, Ding, J., Fu, H., Zhou, X.*, Li, R., Xiong, T., Song, X., Ho, J.C., and Lu, Y*. (2025). Harnessing screw dislocations in shell-lattice metamaterials for efficient, stable electrocatalysts. Nature Communications 16, 7273
We developed a scalable 3D printing framework that builds nanoscale features directly into macroscale catalytic electrodes—avoiding the weak interfaces that often occur when coating nanomaterials onto a substrate. By designing a 3D architecture with hierarchical curvatures, we induced the formation of screw dislocations during growth. These dislocations not only create interface-free surface nanostructures but also generate 3D lattice strains in the material that lower reaction energy barriers and enhance nitrate adsorption.
Karthikeyan, V.,#, Surjadi, J.U.#, Fan, R., Li, X., Vellaisamy, A.L.R.*, and Lu, Y*. (2023). 3D architected thermoelectric devices with ultrahigh toughness and power conversion efficiency. Nature Communications 14, 2069
Karthikeyan, V.,#, Surjadi, J.U.#, Fan, R., Li, X., Vellaisamy, A.L.R.*, and Lu, Y*. (2023). 3D architected thermoelectric devices with ultrahigh toughness and power conversion efficiency. Nature Communications 14, 2069
Thermoelectric generators are limited by heat stagnation and brittle failure, creating a trade-off between efficiency and mechanical robustness. We developed strong and ductile core-shell functional lattices to assemble mechanically robust thermoelectric generators (TEGs) which can retain larger thermal gradients compared to its monolithic counterpart and achieve higher device efficiencies compared to other reported TEGs that uses the conventional monolithic legs.
Surjadi, J.U., Zhou, Y., Huang, S., Fan, S., Li, X., Zhou, J., Lam, R.H.W., Wang, Z., and Lu, Y*. (2022). Lightweight, ultratough 3D architected hybrid carbon microlattices. Matter 5, 1-17
Surjadi, J.U., Zhou, Y., Huang, S., Fan, S., Li, X., Zhou, J., Lam, R.H.W., Wang, Z., and Lu, Y*. (2022). Lightweight, ultratough 3D architected hybrid carbon microlattices. Matter 5, 1-17
We developed a simple way to convert 3D-printed photopolymer lattices into lightweight, strong, and ductile carbon composite lattices.
Featured in City University of Hong Kong News, Phys.org, EurekAlert!, Science Daily, 3D Printing Industry, 3DPrint.com, and several other media outlets.
Feng, X.#, Surjadi, J.U.#, Fan, R., Li, X., Zhou, W., Zhao, S., and Lu, Y*. (2021). Microalloyed medium-entropy alloy (MEA) composite nanolattices with ultrahigh toughness and cyclability. Materials Today 42, 10-16
(Front Cover)
3D nanolattices are extremely lightweight and strong but often fail due to brittle fracture during repeated use. By coating polymer nanolattices with an ultrathin, ductile metal alloy, we create tough, highly recoverable structures that resist damage under large deformations while maintaining high energy absorption and strength-to-weight performance.
Surjadi, J.U., Gao, L., Du, H., Li, X., Xiong, X., Fang, N.X.*, and Lu, Y*. (2019). Mechanical metamaterials and their engineering applications. Advanced Engineering Materials 21, 1800864
(ESI Highly Cited Paper)
We provide an overview of recent advances in mechanical metamaterials across multiple length scales, from the nanoscale to the macroscale. In particluar, we highlight key design principles, fabrication strategies, and applications that have driven major breakthroughs over the past decade, while outlining the underlying theories and the full development pipeline—from modeling and design to testing and real-world implementation.
Featured in Advanced Science News, Hall of Fame, MIT MechE
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