Publications by Snaedis Björgvinsdóttir

Colloidal-ALD Grown Hybrid Shells Nucleate via a Ligand–Precursor Complex

David Lyndon Emsley, Raffaella Buonsanti, Anna Loiudice, Kevin Rossi, Michael Allan Hope, Snaedis Björgvinsdóttir, Ona Segura Lecina, Amrit Venkatesh

Colloidal atomic layer deposition (c-ALD) enables the growth of hybrid organic/inorganic oxide shells with tunable thickness at the nanometer scale around ligand-functionalized inorganic nanoparticles (NPs). This recently developed method has demonstrated ...

2022

Bulk Hyperpolarization of Inorganic Materials

David Lyndon Emsley, Snaedis Björgvinsdóttir

Solid-state NMR spectroscopy is a well-established method to obtain atomic-level information about the structure of inorganic materials, but its use is often limited by low sensitivity. We review how solvent generated dynamic nuclear polarization can be us ...

2021

A Magic Angle Spinning Activated O-17 DNP Raser

David Lyndon Emsley, Snaedis Björgvinsdóttir, Michael Allan Hope

In the raser effect, a sample spontaneously emits continuous radiofrequency radiation, allowing exceptionally narrow NMR line widths to be recorded without applying pulses. To achieve this phenomenon, a large negative magnetization must be induced, which w ...

2021

Endogenous O-17 Dynamic Nuclear Polarization of Gd-Doped CeO2 from 100 to 370 K

David Lyndon Emsley, Snaedis Björgvinsdóttir, Moreno Lelli, Michael Allan Hope, Georges Guévork Jean-Jacques Menzildjian, Bowen Zhang, Zhuoran Wang

O-17 NMR is an invaluable tool to study the structure and dynamics of oxide materials but remains challenging to apply in many systems. Even with isotopic enrichment, studies of samples with low masses and/or concentrations of the active species, such as t ...

2021

Dynamic Nuclear Polarization Enhancement of 200 at 21.15 T Enabled by 65 kHz Magic Angle Spinning

David Lyndon Emsley, Yu Rao, Pierrick Berruyer, Moreno Lelli, Gabriele Stevanato, Snaedis Björgvinsdóttir, Andrea Bertarello

Solid-state nuclear magnetic resonance under magic angle spinning (MAS) enhanced with dynamic nuclear polarization (DNP) is a powerful approach to characterize many important classes of materials, allowing access to previously inaccessible structural and d ...

2020

Sensitivity Enhancements in Lithium Titanates by Incipient Wetness Impregnation DNP NMR

David Lyndon Emsley, Pierrick Berruyer, Pinelopi Moutzouri, Michael Allan Hope, Snaedis Björgvinsdóttir

Solid-state NMR spectroscopy is a widely used method for investigating structural and electronic properties of inorganic materials, but its use is often limited by low sensitivity. Here, we show how solvent-generated dynamic nuclear polarization can be use ...

2020

Hyperpolarization of inorganic solids

Snaedis Björgvinsdóttir

Solid-state NMR can provide information about the atomic level structure and dynamics of materials. It directly probes symmetry and structure at nuclear sites, and is especially useful for investigation of disordered or amorphous solids that lack long rang ...

EPFL2020

Hyperpolarization transfer pathways in inorganic materials

David Lyndon Emsley, Brennan James Walder, Pinelopi Moutzouri, Nicolas Luc Matthey, Snaedis Björgvinsdóttir

Dynamic nuclear polarization can be used to hyperpolarize the bulk of proton-free inorganic materials in magic angle spinning NMR experiments. The hyperpolarization is generated on the surface of the material with incipient wetness impregnation and from th ...

Academic Press Inc - Elsevier Science2020

Bulk Nuclear Hyperpolarization of Inorganic Solids by Relay from the Surface

David Lyndon Emsley, Arthur César Pinon, Brennan James Walder, Snaedis Björgvinsdóttir

2018

DNP enhanced NMR with flip-back recovery

David Lyndon Emsley, Arthur César Pinon, Brennan James Walder, Jayasubba Reddy Yarava, Snaedis Björgvinsdóttir

Academic Press Inc - Elsevier Science2018