A5088877550- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Physics of Superconductivity and Magnetism
- Transition Metal Oxide Nanomaterials
- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- Pigment Synthesis and Properties
- Advanced Battery Technologies Research
- Gas Sensing Nanomaterials and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Copper-based nanomaterials and applications
- Conducting polymers and applications
- Magnetic properties of thin films
- Chalcogenide Semiconductor Thin Films
- Advanced Condensed Matter Physics
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Synthesis and characterization of novel inorganic/organometallic compounds
- Advanced NMR Techniques and Applications
- Organometallic Complex Synthesis and Catalysis
- Thermal Expansion and Ionic Conductivity
- Copper Interconnects and Reliability
- Extraction and Separation Processes
- Advanced battery technologies research
- Superconducting Materials and Applications
- Advanced Photocatalysis Techniques
CIC energiGUNE
2015-2022
Ikerbasque
2017-2022
Lawrence Berkeley National Laboratory
2010-2018
Parque Tecnológico de la Salud
2018
The University of Texas at Austin
2013-2015
Berkeley College
2014
Institut de Ciència de Materials de Barcelona
2005-2012
Universitat Autònoma de Barcelona
2012
Consejo Superior de Investigaciones Científicas
2007-2011
Localized surface plasmon absorption features arise at high doping levels in semiconductor nanocrystals, appearing the near-infrared range. Here we show that plasmons of tin-doped indium oxide nanocrystal films can be dynamically and reversibly tuned by postsynthetic electrochemical modulation electron concentration. Without ion intercalation associated material degradation, induce a > 1200 nm shift wavelength factor nearly three change carrier density.
Electrochromic devices, which dynamically change colour under applied potential, are widely studied for use in energy-efficient smart windows. To improve the viability of windows, many researchers utilizing nanomaterials, can provide electrochromic devices with improved colouration efficiencies, faster switching times, longer cycle lives, and potentially reduced costs. In an effort to demonstrate a new type device that goes beyond capabilities commonly used materials, have turned plasmonic...
Plasmonic nanocrystals have been attracting a lot of attention both for fundamental studies and different applications, from sensing to imaging optoelectronic devices. Transparent conductive oxides represent an interesting class plasmonic materials in addition metals vacancy-doped semiconductor quantum dots. Herein, we report rational synthetic strategy high-quality colloidal aluminum-doped zinc oxide nanocrystals. The presence substitutional aluminum the lattice accompanied by generation...
All-solid-state batteries including a garnet ceramic as electrolyte are potential candidates to replace the currently used Li-ion technology, they offer safer operation and higher energy storage performances. However, development of faces several challenges at electrode/electrolyte interfaces, which need withstand high current densities enable competing C-rates. In this work, we investigate limits anode/electrolyte interface in full cell that includes Li-metal anode, LiFePO4 cathode,...
Ole-ain't: Trialkyl oxonium salts are universal reagents for native-ligand stripping of carboxylate- (e.g., oleate-), phosphonate-, and amine-passivated nanocrystal thin films dispersions to give bare or BF4−/DMF-passivated surfaces. Meerwein-activated PbSe (see picture) show hole mobilities about 2–4 cm2 V−1 s−1, which suggest applications this process in fabricating high-performance devices. Native coordinating ligands acquired during the chemical synthesis colloidal nanocrystals optimized...
Plasmonic nanocrystals of highly doped metal oxides have seen rapid development in the past decade and represent a class materials with unique optoelectronic properties. In this Perspective, we discuss doping mechanisms accompanying physics free carrier scattering, both which implications determining properties localized surface plasmon resonances (LSPRs) these nanocrystals. The balance between activation compensation dopants limits concentration most common oxides, placing ceiling on LSPR...
Solid state electrolytes could address the current safety concerns of lithium-ion batteries as well provide higher electrochemical stability and energy density. Among solid electrolyte contenders, garnet-structured Li7La3Zr2O12 appears a particularly promising material owing to its wide window; however, ionic conductivity remains an order magnitude below that ubiquitous liquid electrolytes. Here, we present innovative dual substitution strategy developed enhance Li-ion mobility in A first...
We report a new colloidal synthesis of niobium-doped TiO2 anatase nanocrystals (NCs) that allows for the preparation ∼10 nm NCs with control over amount Nb doping up to ∼14%. The incorporation niobium ions leads appearance tunable, broad absorption peak ranges from visible range mid-infrared. This optical behavior is attributed substitution Nb5+ on Ti4+ sites generating free carriers inside conduction band as supported by and electron paramagnetic resonance spectroscopic investigations. At...
A plasmonic electrochromic effect in which electrochemical doping reversibly modulates near-infrared surface plasmon absorption of aluminium-doped zinc oxide and tin-doped indium nanocrystals is reported. Optical performance, switching kinetics, cycling durability point to high-performance NIR selective coatings based on earth-abundant materials.
A methodology of general validity to study vortex pinning in YBa2Cu3O7−δ (YBCO) is described. It based on measuring the angular-dependent critical current density a large range temperatures and magnetic fields it permits one identify, separate quantify three basic contributions associated anisotropic–strong, isotropic–strong isotropic–weak centers. The corresponding phase diagrams for these are built up. This applied recently discovered solution-derived YBCO–BaZrO3 nanocomposites which...
Ceramic–polymer solid electrolytes, combined with Li metal anodes, hold the promise for safer and more energetically dense battery technologies, as long key interfacial challenges are fully understood solved. Here, we investigate a garnet–PEO(LiTFSI) composite electrolyte system, garnet filler being Li6.55Ga0.15La3Zr2O12 (LLZO) microparticles. A "soft" mechanical milling process ensures good miscibility between polymer phases over wide range of volume fraction (up to 70 vol % garnet)....
A thorough analytical study on the thermal decomposition evolution of metal-trifluoroacetate precursor toward high-performance YBa2Cu3O7 superconducting films is presented. Evolved gas analysis (EGA), using Fourier transform infrared spectroscopy (FTIR) and mass spectrometry (MS), as well X-ray diffraction (XRD), was performed to determine complete chemical reaction precursors. It noteworthy that, contrary what had been previously described, HF not detected in released gas. Moreover, we...
We report the preparation of solution-derived metal oxide nanocomposite films by combining polyoxometalates (POMs) and colloidal nanocrystals. Polyniobates vanadates were combined with Sn-doped In2O3 (ITO) nanocrystals leading to Nb2O5–ITO, V2O5–ITO VO2–ITO films. Compared other solution-phase methodologies, this approach offers excellent control nanoinclusion composition, size, morphology, volume fraction. Two different methodologies have been used, which are based on ex situ (in solution)...
Garnet-structured Li7La3Zr2O12 is a promising solid electrolyte for next-generation solid-state Li batteries. However, sufficiently fast Li-ion mobility required battery applications only emerges at high temperatures, upon phase transition to cubic structure. A well-known strategy stabilize the room temperature relies on aliovalent substitution; in particular, substitution of Li+ by Al3+ and Ga3+ ions. Yet, despite having same formal charge, yields higher conductivities (10-3 S/cm) than...
Solid-state batteries with a Li metal anode and polymer–ceramic electrolytes hold the promise to boost safety energy density, provided that stable conductive interfaces are achieved. Here, by focusing on composite electrolyte system LLZO–PEO(LiTFSI), i.e., Li-ion doped-Li7La3Zr2O12 (LLZO) garnet fillers embedded within poly(ethylene oxide) matrix, we report impact processing has its mesostructure ultimately full cell kinetics. Two distinct solvent-based routes used prepare membranes fixed...
Through synthesizing colloidal nanocrystals (NCs) in the organic phase, chemists gain fine control over their composition, size, and shape. Strategies for arranging them into ordered superlattices have followed closely behind synthetic advances. Nonetheless, same hydrophobic ligands that help assembly also severely limit interactions between adjacent nanocrystals. As a result, examples of nanocrystal-based materials whose functionality derives from mesoscale structure lagged well advances...
Dynamic control over the localized surface plasmon resonance (LSPR) makes doped metal oxide nanocrystals (NCs) promising for several optoelectronic applications including electrochromic smart windows and redox sensing. Metal NCs such as tin-doped indium display tunable infrared LSPRs via electrochemical charge injection extraction a function of externally applied potential. In this work we have employed dispersion phase charging/discharging to study mechanism behind optical modulation on an...
Electron transfer in complex aqueous systems can be observed remotely with single‐electron sensitivity using locally dispersed nanostructures conferred electronic charge concentration‐dependent plasmonic properties. When introduced to a system out of redox equilibrium, tin‐doped indium oxide nanocrystals undergo rapid multielectron until equilibrium is reached; this modulates their free carrier concentration and optical properties the spectrally isolated near‐infrared. This capability...
Abstract Freeze casting is used for the first time to prepare solid electrolyte scaffolds with oriented porosity and dense ceramic walls made of Li 7 La 3 Zr 2 O 12 ( LLZO ), one most promising candidates solid‐state battery electrolytes. Processing parameters—such as solvent solidification rate, type, particle size—are investigated, focusing on their influence wall density. Dendrite‐like obtained when using cyclohexane dioxane solvents. Lamellar observed in aqueous slurries resulting a...