Jiayue Wang

All Publications

• Defect-Engineered Scaling of Lead-Free Ferroelectrics with Ultra-Low-Voltage Switching. Nano letters Ghanbari, R., Wang, J., Kp, H., Shi, Z., Khandelwal, A., Koons, K., Rodrigues, E., Zhou, T., Holt, M., Muller, D. A., Hwang, H. Y., Xu, R. 2026

  Abstract

  Scaling ferroelectrics to nanometer thicknesses remains a central challenge for low-power, nonvolatile electronics, as leakage currents increasingly dominate at reduced dimensions. Alkali-based, lead-free ferroelectrics offer an environmentally sustainable alternative to lead-based systems, yet their scaling is severely limited by leakage arising from volatile alkali constituents. Here, we show that this intrinsic limitation can be transformed into an advantageous degree of freedom through defect engineering. By precisely modulating alkali deficiency during thin-film synthesis, we engineer clustered defect complexes that function as deep trap states, strongly suppressing leakage and enabling robust ferroelectric operation in ultrathin films down to the sub-10 nm regime at voltages below 100 mV. Our results establish defect-enabled scaling as a viable pathway for advancing environmentally benign ferroelectrics toward ultra-low-power, nonvolatile electronic technologies.

  View details for DOI 10.1021/acs.nanolett.6c01514

  View details for PubMedID 42430147

• Freestanding Ordered Intermetallic Nanomembranes Released from Etchable Oxide Templates. Journal of the American Chemical Society Wang, J., Cui, Y., Blake, E., Li, J., Wei, X., Khandelwal, A., Hoogendoorn, L., Yu, Y., Theuss, F., Han, Y., Wang, T. C., Zhang, G., Wu, Y., Barnum, A., Hart, P., Thampy, V., Cui, Y., Hwang, H. Y. 2026

  Abstract

  Intermetallic compounds exhibit long-range atomic ordering that endows them with physicochemical properties distinct from those of elemental metals and disordered alloys. Extending ordered intermetallics into ultrathin, freestanding geometries is of both fundamental and technological interest, yet it remains challenging because the high temperatures required for chemical ordering exceed the thermal stability of conventional sacrificial templates. Here, we introduce water-etchable aluminate oxides as lattice-matched, thermally robust sacrificial templates for the epitaxial growth and nondestructive release of intermetallic nanomembranes. Using Pt3Sn as a model system, we realize millimeter-scale freestanding membranes that preserve long-range chemical order and crystallographic orientation after being released. These nanomembranes maintain structural integrity and mechanical robustness during transfer and under mechanical loading, demonstrating their compatibility with flexible device architectures. Low-temperature magnetotransport measurements further reveal the preservation of quantum interference and multiband transport behaviors. This oxide template strategy establishes a generalizable synthetic pathway toward freestanding intermetallic nanomembranes and other ultrathin metal systems.

  View details for DOI 10.1021/jacs.6c06492

  View details for PubMedID 42290513

• Atomic-Scale Moiré and Electronic Structure Analysis of Twisted Epitaxial MoS2-Au-MoS2 Heterostructures. Nano letters Cui, Y., Xu, K., Ren, P., Yuan, L., Czaja, P., Barnum, A., Sarkar, P., Altman, A., Bustillo, K., Kundu, S., Ramdas, A., Wang, X., Wan, G., Wang, Y., Wang, J., Song, C., Lim, C., Zheng, Q., Yao, H., Heinz, T., Hwang, H. Y., Majumdar, A., Dionne, J. A., Ophus, C., da Jornada, F. H., Sinclair, R., Cui, Y. 2026

  Abstract

  Twisted epitaxy enables precise orientation control of nanostructures confined within van der Waals (vdW) gaps. Here, we investigate the moiré and electronic structure of a representative twisted epitaxial system, where Au nanodiscs are grown inside twisted bilayer MoS2 with a 6° interlayer twist, inducing a 3° symmetrical misalignment of Au relative to each MoS2 layer (MoS2-Au-MoS2). Using multislice electron ptychography (MEP), we resolve the three-dimensional "moiré-of-moirés" structure of MoS2-Au-MoS2 with atomic resolution. Electron energy loss spectroscopy (EELS) shows that MoS2 encapsulation significantly reduces the plasmon energy of Au nanodiscs compared with their unencapsulated counterparts. Furthermore, first-principles calculations reveal that Au insertion alters the electronic band alignment near the Fermi level of bilayer MoS2. Our results introduce a twisted MoS2-Au-MoS2 heterostructure as a structurally and electronically rich material system and establish twisted epitaxy as a new strategy for moiré engineering and the synthesis of 2D-confined materials with tunable optoelectronic properties.

  View details for DOI 10.1021/acs.nanolett.5c04205

  View details for PubMedID 41705938

• Reducing the Strain Required for Ambient-Pressure Superconductivity in Ruddlesden-Popper Bilayer Nickelates. Advanced materials (Deerfield Beach, Fla.) Tarn, Y., Liu, Y., Theuss, F., Li, J., Wang, B. Y., Bhatt, L., Wang, J., Song, J., Thampy, V., Goodge, B. H., Muller, D. A., Shen, Z. X., Yu, Y., Hwang, H. Y. 2026: e20724

  Abstract

  The discovery of high-temperature superconductivity in pressurized bulk Ruddlesden-Popper (RP) bilayer nickelates has prompted the conjecture that epitaxial compressive strain might mimic essential aspects of hydrostatic pressure. The realization of superconductivity in films on SrLaAlO4 (001) (SLAO) supports this correspondence, yet it remains unclear whether the pressure-temperature phase diagram of RP bilayer nickelates can be systematically mapped (and studied at ambient pressure) as a function of epitaxial strain. To this end, experimental access near the elusive edge of the superconducting phase boundary would provide invaluable insight into the nature of the superconducting state and the ground state from which it emerges. Here we report superconducting RP bilayer nickelates grown on LaAlO3 (001) (LAO), where the compressive strain required for ambient-pressure superconductivity is nearly halved to -1.2%. These films exhibit a superconducting onset above 10 K and reach zero resistance at 3 K, with normal-state transport properties differing from those of films grown on SLAO. Our comparative study shows that strain-rather than interfacial structure is the primary factor governing the superconductivity and normal-state properties. This work offers a new opportunity to probe emergent phenomena near the superconducting phase boundary in the strain-temperature phase diagram of RP bilayer nickelates.

  View details for DOI 10.1002/adma.202520724

  View details for PubMedID 41677074

• Freestanding SrNbO₃ membranes as flexible transparent conductors APL MATERIALS Ko, E., Wang, B., Lee, J., Wang, J., Crust, K. J., Hwang, H. Y. 2026; 14 (1)

  View details for DOI 10.1063/5.0310409

  View details for Web of Science ID 001653970300001

• Strain-induced lead-free morphotropic phase boundary. Nature communications Ghanbari, R., Kp, H., Patel, K., Zhou, H., Zhou, T., Liu, R., Wu, L., Khandelwal, A., Crust, K. J., Hazra, S., Carroll, J., Meyers, C. J., Wang, J., Prosandeev, S., Qiao, H., Kim, Y. H., Nabei, Y., Chi, M., Sun, D., Balke, N., Holt, M., Gopalan, V., Spanier, J. E., Muller, D. A., Bellaiche, L., Hwang, H. Y., Xu, R. 2025; 16 (1): 7766

  Abstract

  Enhanced susceptibilities in ferroelectrics often arise near phase boundaries between competing ground states. While chemically-induced phase boundaries have enabled ultrahigh electrical and electromechanical responses in lead-based ferroelectrics, precise chemical tuning in lead-free alternatives, such as (K,Na)NbO3 thin films, remains challenging due to the high volatility of alkali metals. Here, we demonstrate strain-induced morphotropic phase boundary-like polymorphic nanodomain structures in chemically simple, lead-free, epitaxial NaNbO3 thin films. Combining ab initio simulations, thin-film epitaxy, scanning probe microscopy, synchrotron X-ray diffraction, and electron ptychography, we reveal a labyrinthine structure comprising coexisting monoclinic and bridging triclinic phases near a strain-induced phase boundary. The coexistence of energetically competing phases facilitates field-driven polarization rotation and phase transitions, giving rise to a multi-state polarization switching pathway and large enhancements in dielectric susceptibility and tunability across a broad frequency range. Our results open new possibilities for engineering lead-free thin films with enhanced functionalities for next-generation applications.

  View details for DOI 10.1038/s41467-025-63041-w

  View details for PubMedID 40835605

  View details for PubMedCentralID 8423788

• Fermi Level Equilibration and Charge Transfer at the Exsolved Metal-Oxide Interface. Journal of the American Chemical Society Wang, J., Yang, J., Wardini, J. L., Waluyo, I., Hunt, A., Crumlin, E. J., Fairley, N., Bowman, W. J., Hwang, H. Y., Yildiz, B. 2025

  Abstract

  Exsolution is a promising approach for fabricating oxide-supported metal nanocatalysts through redox-driven metal precipitation. A defining feature of exsolved nanocatalysts is their anchored metal-oxide interface, which exhibits exceptional structural stability in (electro)catalysis. However, the electronic interactions at this unique interface remain unclear, despite their known impact on catalytic performance. In this study, we confirm charge transfer between the host oxide and the exsolved metal by demonstrating a two-stage Fermi level (EF) evolution on SrTi0.65Fe0.35O3-δ (STF) during metallic iron (Fe0) exsolution. Combining ambient pressure X-ray photoelectron spectroscopy with theoretical analysis, we show that EF initially rises due to electron doping from oxygen vacancy formation in STF. Subsequently, upon Fe0 precipitation, EF stabilizes and becomes insensitive to further oxygen release in STF, driven by EF equilibration and charge transfer between STF and the exsolved Fe0. These findings highlight the importance of considering electronic metal-support interactions when optimizing exsolved nanocatalysts.

  View details for DOI 10.1021/jacs.4c14695

  View details for PubMedID 39818799

• Molecular H2as the Reducing Agent in Low-Temperature Oxide Reduction Using Calcium Hydride. Journal of the American Chemical Society Wang, J., Yu, Y., Abdelkawy, A., Li, J., Li, J., Yang, J., Ko, E. K., Lee, Y., Thampy, V., Cui, Y., Todorova, M., Neugebauer, J., Hwang, H. Y. 2025

  Abstract

  Low-temperature synthesis is crucial for advancing sustainable manufacturing and accessing novel metastable phases. Metal hydrides have shown great potential in facilitating the reduction of oxides at low temperatures, yet the underlying mechanism─whether driven by H-, H2, or atomic H─remains unclear. In this study, we employ in situ electrical transport measurements and first-principles calculations to investigate the CaH2-driven reduction kinetics in epitaxial alpha-Fe2O3 thin films. Intriguingly, samples in direct contact with or separated from CaH2 powders exhibit similar apparent activation energies for H2 reduction, although direct contact significantly increases the reduction rate. These findings indicate that molecular H2 is the dominant reducing species in the low-temperature reduction of oxides using CaH2, with a key aspect of the hydrides' superior reducing power attributed to their ability to eliminate residual moisture. This work underscores the critical role of moisture control in enabling effective low-temperature oxide reduction for advanced material synthesis.

  View details for DOI 10.1021/jacs.4c17825

  View details for PubMedID 39807810

• Recommended strategies for quantifying oxygen vacancies with X-ray photoelectron spectroscopy JOURNAL OF THE EUROPEAN CERAMIC SOCIETY Wang, J., Mueller, D. N., Crumlin, E. J. 2024; 44 (15)

  View details for DOI 10.1016/j.jeurceramsoc.2024.116709

  View details for Web of Science ID 001275754400001

• Ion irradiation to control size, composition and dispersion of metal nanoparticle exsolution ENERGY & ENVIRONMENTAL SCIENCE Wang, J., Woller, K. B., Kumar, A., Zhang, Z., Zhou, H., Waluyo, I., Hunt, A., LeBeau, J. M., Yildiz, B. 2023; 16 (11): 5464-5478

  View details for DOI 10.1039/d3ee02448b

  View details for Web of Science ID 001085422300001

• Roadmap on exsolution for energy applications JOURNAL OF PHYSICS-ENERGY Neagu, D., Irvine, J. S., Wang, J., Yildiz, B., Opitz, A. K., Fleig, J., Wang, Y., Liu, J., Shen, L., Ciucci, F., Rosen, B. A., Xiao, Y., Xie, K., Yang, G., Shao, Z., Zhang, Y., Reinke, J., Schmauss, T. A., Barnett, S. A., Maring, R., Kyriakou, V., Mushtaq, U., Tsampas, M. N., Kim, Y., O'Hayre, R., Carrillo, A. J., Ruh, T., Lindenthal, L., Schrenk, F., Rameshan, C., Papaioannou, E. I., Kousi, K., Metcalfe, I. S., Xu, X., Liu, G. 2023; 5 (3)

  View details for DOI 10.1088/2515-7655/acd146

  View details for Web of Science ID 001045124500001

• Fast Surface Oxygen Release Kinetics Accelerate Nanoparticle Exsolution in Perovskite Oxides JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Wang, J., Kalaev, D., Yang, J., Waluyo, I., Hunt, A., Sadowski, J. T., Tuller, H. L., Yildiz, B. 2023; 145 (3): 1714-1727

  Abstract

  Exsolution is a recent advancement for fabricating oxide-supported metal nanoparticle catalysts via phase precipitation out of a host oxide. A fundamental understanding and control of the exsolution kinetics are needed to engineer exsolved nanoparticles to obtain higher catalytic activity toward clean energy and fuel conversion. Since oxygen release via oxygen vacancy formation in the host oxide is behind oxide reduction and metal exsolution, we hypothesize that the kinetics of metal exsolution should depend on the kinetics of oxygen release, in addition to the kinetics of metal cation diffusion. Here, we probe the surface exsolution kinetics both experimentally and theoretically using thin-film perovskite SrTi0.65Fe0.35O3 (STF) as a model system. We quantitatively demonstrated that in this system the surface oxygen release governs the metal nanoparticle exsolution kinetics. As a result, by increasing the oxygen release rate in STF, either by reducing the sample thickness or by increasing the surface reactivity, one can effectively accelerate the Fe0 exsolution kinetics. Fast oxygen release kinetics in STF not only shortened the prereduction time prior to the exsolution onset, but also increased the total quantity of exsolved Fe0 over time, which agrees well with the predictions from our analytical kinetic modeling. The consistency between the results obtained from in situ experiments and analytical modeling provides a predictive capability for tailoring exsolution, and highlights the importance of engineering host oxide surface oxygen release kinetics in designing exsolved nanocatalysts.

  View details for DOI 10.1021/jacs.2c10256

  View details for Web of Science ID 000918057900001

  View details for PubMedID 36627834

• Exsolution-Driven Surface Transformation in the Host Oxide NANO LETTERS Wang, J., Kumar, A., Wardini, J. L., Zhang, Z., Zhou, H., Crumlin, E. J., Sadowski, J. T., Woller, K. B., Bowman, W. J., LeBeau, J. M., Yildiz, B. 2022; 22 (13): 5401-5408

  Abstract

  Exsolution synthesizes self-assembled metal nanoparticle catalysts via phase precipitation. An overlooked aspect in this method thus far is how exsolution affects the host oxide surface chemistry and structure. Such information is critical as the oxide itself can also contribute to the overall catalytic activity. Combining X-ray and electron probes, we investigated the surface transformation of thin-film SrTi0.65Fe0.35O3 during Fe0 exsolution. We found that exsolution generates a highly Fe-deficient near-surface layer of about 2 nm thick. Moreover, the originally single-crystalline oxide near-surface region became partially polycrystalline after exsolution. Such drastic transformations at the surface of the oxide are important because the exsolution-induced nonstoichiometry and grain boundaries can alter the oxide ion transport and oxygen exchange kinetics and, hence, the catalytic activity toward water splitting or hydrogen oxidation reactions. These findings highlight the need to consider the exsolved oxide surface, in addition to the metal nanoparticles, in designing the exsolved nanocatalysts.

  View details for DOI 10.1021/acs.nanolett.2c01439

  View details for Web of Science ID 000823670300001

  View details for PubMedID 35771744

• Strain-Dependent Surface Defect Equilibria of Mixed Ionic-Electronic Conducting Perovskites CHEMISTRY OF MATERIALS Wang, J., Yang, J., Opitz, A., Kalaev, D., Nenning, A., Crumlin, E. J., Sadowski, J. T., Waluyo, I., Hunt, A., Tuller, H. L., Yildiz, B. 2022; 34 (11): 5138-5150

  View details for DOI 10.1021/acs.chemmater.2c00614

  View details for Web of Science ID 000811926400001

• Anodic Shock-Triggered Exsolution of Metal Nanoparticles from Perovskite Oxide JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Fan, W., Wang, B., Gao, R., Dimitrakopoulos, G., Wang, J., Xiao, X., Ma, L., Wu, K., Yildiz, B., Li, J. 2022; 144 (17): 7657-7666

  Abstract

  Nanoparticles decorated electrodes (NDEs) are useful in fuel cells, electrolyzers, water treatment, and chemical synthesis. Here, we show that by rapidly bringing a mixed ionic-electronic conductor outside its electrochemical stability window, one can achieve uniform dispersion of metallic nanoparticles inside its bulk and at the surface and improve its electrocatalytic performance when back under normal functional conditions. Surprisingly, this can happen under anodic as well as cathodic current/voltage shocks in an ABO3 perovskite oxide, La0.4Ca0.4Ti0.88Fe0.06Ni0.06O3-δ (LCTFN), across a wide range of H2/O2 gas environments at 800 °C. One possible mechanism for bulk Fe0/Ni0 precipitation under anodic shock condition is the incomplete oxygen oxidation (O2- → Oα-, 0 < α < 2), migration and escape of oxygen to interfaces, and "whiplash" transition-metal reduction due to low electronic conductivity. We show that both cathodic and anodic shocks can produce NDEs to enhance electrocatalytic performance, potentially improving the flexibility of this approach in practical devices.

  View details for DOI 10.1021/jacs.1c12970

  View details for Web of Science ID 000798986400020

  View details for PubMedID 35471024

• Thermally Controlled Activation and Passivation of Surface Chemistry and Oxygen-Exchange Kinetics on a Perovskite Oxide CHEMISTRY OF MATERIALS Tripkovic, D., Wang, J., Kungas, R., Mogensen, M., Yildiz, B., Hendriksen, P. 2022; 34 (4): 1722-1736

  View details for DOI 10.1021/acs.chemmater.1c03901

  View details for Web of Science ID 000812211300001

• Bulk and surface exsolution produces a variety of Fe-rich and Fe-depleted ellipsoidal nanostructures in La_0.6Sr_0.4FeO₃ thin films NANOSCALE Syed, K., Wang, J., Yildiz, B., Bowman, W. J. 2022; 14 (3): 663-674

  Abstract

  The past several years have seen a resurgence in the popularity of metal exsolution as an approach to synthesize advanced materials proposed for novel catalytic, magnetic, optical, and electrochemical properties. Whereas most studies to-date have focused on surface exsolution (motivated by catalysis), we instead report on the diversity of nanostructures formed in La0.6Sr0.4FeO3 thin films during sub-surface or so-called 'bulk' exsolution, in addition to surface exsolution. Bulk exsolution is a promising approach to tuning the functionality of materials, yet there is little understanding of the nanostructures exsolved within the bulk and how they compare to those exsolved at gas-solid interfaces. This work combines atomic- and nano-scale imaging and spectroscopy techniques applied using a state-of-the-art aberration-corrected scanning transmission electron microscope (STEM). In doing so, we present a detailed atomic-resolution study of a range of Fe-rich and Fe-depleted nanostructures possible via exsolution, along with qualitative and quantitative chemical analysis of the exsolved nanostructures and oxide phases formed throughout the film. Local structural changes in the perovskite matrix, coinciding with nanostructure exsolution, are also characterized with atomic-resolution STEM imaging. Fe exsolution is shown to create local A-site rich domains of Ruddlesden-Popper phase, and some stages of this phase formation have been demonstrated in this work. In particular, phase boundaries are found to be the primary nucleation sites for bulk and surface exsolution, and the exsolved particles observed here tend to be ellipsoidal with shape factor of 1.4. We report a range of nanostructure types (core-shell, bulk core-shell, adjacent, and independent particles), revealing several possible avenues of future exploration aimed to understand the formation mechanism of each exsolution type and to develop their functionality. This work is thus relevant to materials scientists and engineers motivated to understand and utilize exsolution to synthesize materials with predictable nanostructures.

  View details for DOI 10.1039/d1nr06121f

  View details for Web of Science ID 000727616400001

  View details for PubMedID 34874392

• Exsolution Synthesis of Nanocomposite Perovskites with Tunable Electrical and Magnetic Properties ADVANCED FUNCTIONAL MATERIALS Wang, J., Syed, K., Ning, S., Waluyo, I., Hunt, A., Crumlin, E. J., Opitz, A. K., Ross, C. A., Bowman, W. J., Yildiz, B. 2022; 32 (9)

  View details for DOI 10.1002/adfm.202108005

  View details for Web of Science ID 000720263200001

• Tuning Point Defects by Elastic Strain Modulates Nanoparticle Exsolution on Perovskite Oxides CHEMISTRY OF MATERIALS Wang, J., Yang, J., Opitz, A. K., Bowman, W., Bliem, R., Dimitrakopoulos, G., Nenning, A., Waluyo, I., Hunt, A., Gallet, J., Yildiz, B. 2021; 33 (13): 5021-5034

  View details for DOI 10.1021/acs.chemmater.1c00821

  View details for Web of Science ID 000674266000018

• Hf Deposition Stabilizes the Surface Chemistry of Perovskite Manganite Oxide JOURNAL OF PHYSICAL CHEMISTRY C Bliem, R., Kim, D., Wang, J., Crumlin, E. J., Yildiz, B. 2021; 125 (6): 3346-3354

  Abstract

  Stable composition and catalytic activity of surfaces are among the key requirements for materials employed in energy storage and conversion devices, such as solid oxide fuel cells (SOFCs). Perovskite oxides that serve as cathode in SOFCs suffer from segregation of the aliovalent substitutional cations and the formation of an inert, non-conductive phase at the surface. Here, we demonstrate that the surface of the state-of-the-art SOFC cathode material La0.8Sr0.2MnO3 (LSM) is stabilized against the segregation of Sr at high temperature by submonolayer coverages of Hf. The Hf is vapor-deposited onto the LSM thin film surface by e-beam evaporation. Using in situ near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS), we analyze the surface composition of LSM thin films. Half the LSM surface was kept as-prepared, and half was Hf-modified, for a direct comparison of untreated and Hf-treated regions on the same sample. The formation of a binary SrOx surface species is quantified as descriptor for surface degradation. The onset of Sr segregation is observed at 450 °C on the bare LSM, followed by a substantial advance at 550 °C. Hf-treated regions of the same LSM surface exhibit significantly less Sr surface segregation at 450-550 °C. We interpret this stabilization imparted by Hf to arise from the suppression of the electrostatic attraction of Sr2+ cations to surface oxygen vacancies. Doping the surface layer with Hf, that has a higher affinity to oxygen, reduces this attraction by decreasing the surface oxygen vacancy concentration. In doing so, the use of physical vapor deposition highlights the direct role of the metal species in this system and excludes artifacts that could be introduced via chemical routes. The present work demonstrates this stabilizing effect of Hf on the surface of LSM, broadening the relevance of our prior findings on surface metal doping of other perovskite oxides.

  View details for DOI 10.1021/acs.jpcc.0c09707

  View details for Web of Science ID 000621429000010

  View details for PubMedID 33815648

  View details for PubMedCentralID PMC8016110

• Bi-directional tuning of thermal transport in SrCoO_<i>x</i> with electrochemically induced phase transitions NATURE MATERIALS Lu, Q., Huberman, S., Zhang, H., Song, Q., Wang, J., Vardar, G., Hunt, A., Waluyo, I., Chen, G., Yildiz, B. 2020; 19 (6): 655-+

  Abstract

  Unlike the wide-ranging dynamic control of electrical conductivity, there does not exist an analogous ability to tune thermal conductivity by means of electric potential. The traditional picture assumes that atoms inserted into a material's lattice act purely as a source of scattering for thermal carriers, which can only reduce thermal conductivity. In contrast, here we show that the electrochemical control of oxygen and proton concentration in an oxide provides a new ability to bi-directionally control thermal conductivity. On electrochemically oxygenating the brownmillerite SrCoO2.5 to the perovskite SrCoO3-δ, the thermal conductivity increases by a factor of 2.5, whereas protonating it to form hydrogenated SrCoO2.5 effectively reduces the thermal conductivity by a factor of four. This bi-directional tuning of thermal conductivity across a nearly 10 ± 4-fold range at room temperature is achieved by using ionic liquid gating to trigger the 'tri-state' phase transitions in a single device. We elucidated the effects of these anionic and cationic species, and the resultant changes in lattice constants and lattice symmetry on thermal conductivity by combining chemical and structural information from X-ray absorption spectroscopy with thermoreflectance thermal conductivity measurements and ab initio calculations. This ability to control multiple ion types, multiple phase transitions and electronic conductivity that spans metallic through to insulating behaviour in oxides by electrical means provides a new framework for tuning thermal transport over a wide range.

  View details for DOI 10.1038/s41563-020-0612-0

  View details for Web of Science ID 000515477300005

  View details for PubMedID 32094497

• Threshold catalytic onset of carbon formation on CeO₂ during CO₂ electrolysis: mechanism and inhibition JOURNAL OF MATERIALS CHEMISTRY A Wang, J., Bishop, S. R., Sun, L., Lu, Q., Vardar, G., Bliem, R., Tsvetkov, N., Crumlin, E. J., Gallet, J., Bournel, F., Waluyo, I., Yildiz, B. 2019; 7 (25): 15233-15243

  View details for DOI 10.1039/c9ta03265g

  View details for Web of Science ID 000473054500026