Publications de Esther Alarcon Llado

Rational strain engineering in delafossite oxides for highly efficient hydrogen evolution catalysis in acidic media

Anna Fontcuberta i Morral, Esther Alarcon Llado, Filip Mateusz Podjaski

The rational design of catalysts is crucial to make power-to-X technologies viable. Here the authors introduce the delafossite PdCoO2 as a highly active hydrogen evolution reaction catalyst due to the growth of a tensile-strained Pd-rich capping layer unde ...

NATURE PUBLISHING GROUP2020

Pathways to Electrochemical Solar-Hydrogen Technologies

Sophia Haussener, Corsin Battaglia, Esther Alarcon Llado, Jan-Willem Alexander Schüttauf, Miguel Antonio Modestino, Seyyed Mohammad Hosseini Hashemi, Enrico Chinello, Vincent Artero

2018

Conductive-probe atomic force microscopy as a characterization tool for nanowire-based solar cells

Anna Fontcuberta i Morral, Federico Matteini, Esther Alarcon Llado, Gözde Tütüncüoglu, Jelena Vukajlovic Plestina, Dmitry Mikulik, Maria Ricci, Natasa Vulic

The photonic properties of nanowires advocate for their utilization in next generation solar cells. Compared to traditional devices, the electric scheme is transformed from a single into an ensemble of pn junctions connected in parallel. This new configura ...

Elsevier Science Bv2017

Visual Understanding of Light Absorption and Waveguiding in Standing Nanowires with 3D Fluorescence Confocal Microscopy

Anna Fontcuberta i Morral, Federico Matteini, Esther Alarcon Llado, Gözde Tütüncüoglu

Semiconductor nanowires are promising building blocks for next generation photonics. Indirect proofs of large absorption cross sections have been reported in nanostructures with subwavelength diameters, an effect that is even more prominent in vertically s ...

Amer Chemical Soc2017

Surface origin and control of resonance Raman scattering and surface band gap in indium nitride

Esther Alarcon Llado

Resonance Raman scattering measurements were performed on indium nitride thin films under conditions where the surface electron concentration was controlled by an electrolyte gate. As the surface condition is tuned from electron depletion to accumulation, ...

Iop Publishing Ltd2016

From Twinning to Pure Zincblende Catalyst-Free InAs(Sb) Nanowires

Anna Fontcuberta i Morral, Federico Matteini, Gözde Tütüncüoglu, Esther Alarcon Llado, Francesca Amaduzzi, Martin George Friedl, Heidi Andrea Potts

III-V nanowires are candidate building blocks for next generation electronic and optoelectronic platforms. Low bandgap semiconductors such as In As and InSb are interesting because of their high electron mobility. Fine control of the structure, morphology, ...

American Chemical Society2016

Understanding and exploiting optical properties in semiconductor nanowires for solar energy conversion

Anna Fontcuberta i Morral, Federico Matteini, Esther Alarcon Llado, Heidi Andrea Potts

Semiconductor nanowires are promising building blocks for next generation solar energy conversion at low cost, due to their large absorption cross-sections. Here, the understanding of their absorption power is explored via computational and experimental me ...

IEEE2016

Tuning the response of non-allowed Raman modes in GaAs nanowires

Anna Fontcuberta i Morral, Federico Matteini, Esther Alarcon Llado, Gözde Tütüncüoglu, Emanuele Uccelli, Francesca Amaduzzi, Hubert Hautmann

We report on the use of photonic resonances in Raman spectroscopy on single nanowires for the enhancement of forbidden modes and the study of the interaction of phonons with free-carriers. This is achieved by suspending nanowire over a trench and detecting ...

Iop Publishing Ltd2016

Nanowire-Aperture Probe: Local Enhanced Fluorescence Detection for the Investigation of Live Cells at the Nanoscale

Anna Fontcuberta i Morral, Esther Alarcon Llado

Fluorescence microscopy has tackled many of the burning questions in cellular biology. Probing low-affinity cellular interactions remains one of the major challenges in the field to better understand cellular signaling. We introduce a novel approach the na ...

Amer Chemical Soc2016

Morphology and composition of oxidized InAs nanowires studied by combined Raman spectroscopy and transmission electron microscopy

Anna Fontcuberta i Morral, Esther Alarcon Llado, Francesca Amaduzzi

importance for semiconductor nanowires because of the high surface-to-volume ratio and only little is known about the consequences of oxidation for these systems. Here, we study the properties of indium arsenide nanowires which were locally oxidized using ...

Institute of Physics2016