Reminder: Final week to register & submit abstract for the Alpine conference on Magnetic Resonance in Solids 2025, the deadline is May 31 @michal-leskes.bsky.social #NMRevents #NMRchat #NMR 🧲
26.05.2025 13:54 — 👍 3 🔁 2 💬 0 📌 0
Metal Ion Dynamic Nuclear Polarization in Mn(II)-Doped CdS Nanocrystals: Atomic-Scale Investigation of the Dopant and Its Host
Development of functional nanocrystals requires precise control over their composition and structure. Particularly, surface composition, defects, and doping play a central role in our ability to develop functional nanomaterials. As such, there is great interest in capturing these properties. Solid-state NMR spectroscopy is a powerful tool for probing structural and compositional features at the atomic scale, in particular, when it is coupled with the high sensitivity gained by dynamic nuclear polarization (DNP). DNP enhances NMR sensitivity by transferring high electron spin polarization to the surrounding nuclear spins. This dramatically improves the signal intensity, making it a valuable tool for detecting subtle structural features. Utilizing metal ion dopants as polarization agents for DNP has been shown to be an excellent approach to increasing ssNMR sensitivity in the bulk of inorganic solids. Here, we demonstrate the implementation of this approach to nanocrystals, focusing on Mn(II)-doped CdS, where homogeneous doping is known to be challenging while being critical for the DNP process. The intricate nature of the doping was elucidated by quantitative electron microscopy and electron paramagnetic resonance spectroscopy. We confirmed that Mn(II) doping is confined to the core of the nanocrystals and that statistically dopants are homogeneously distributed within each nanocrystal. DNP from Mn(II) dopants is then shown to increase 113Cd NMR sensitivity by an order of magnitude, enabling distinction between core and surface environments as well as the detection of defects in the bulk of the nanocrystals. We expect that the approach can be extended to other nanocrystals, providing an efficient route for characterizing their bulk and surface properties.
Now out in @pubs.acs.org ACSnano 🔥: New application of metal ion DNP for gaining high sensitivity in NMR of semiconductor nanocrystals! Plus a lot of cool electron microscopy and hyperfine epr spectroscopy! Congratulations Ran and Daniel! #NMRchat
pubs.acs.org/doi/10.1021/...
28.04.2025 21:02 — 👍 4 🔁 2 💬 0 📌 0
. @michal-leskes.bsky.social Reminder: Deadline for the application for student grants is in two weeks, April 30, please follow the instructions given here: alpine-conference.org/awards/ #NMRchat 🧲
16.04.2025 14:28 — 👍 1 🔁 2 💬 0 📌 0
@michal-leskes.bsky.social Registration opening soon for the Alpine conference on Magnetic Resonance in Solids 2025. The conference will take place in Chamonix Mont-Blanc, France, on 14-18 September 2025. A number of student grants is available. For updates www.alpine-conference.org #NMRchat #NMR 🧲
05.03.2025 15:22 — 👍 1 🔁 1 💬 0 📌 0
How does spin diffusion affect polarization transfer in DNP from metal ions? Check out our new work:
The role of spin diffusion in endogenous metal ions DNP pubs.aip.org/aip/jcp/articl…
Congratulations to @IliaMoroz92 @dani_jardon 👏👏👏🧲#NMRchat
09.01.2025 12:42 — 👍 4 🔁 1 💬 2 📌 0
Hi Team #NMRchat #NMR. Happy to see you out here!
Let's start spreading the word about the ENC-ISMAR Joint Conference, April 6-10, 2025.
Oral Abstract Deadline: January 10
www.enc-conference.org/enc-ismar-2025
04.12.2024 21:35 — 👍 18 🔁 15 💬 0 📌 5
webinar poster
Wednesday, November 27, 4 pm CET / 10 am EST, Leipzig Spin Resonance Colloquium, Michal Leskes @michal-leskes.bsky.social Elucidating the Structure and Function of Battery Interfaces through DNP – Solid State NMR www.physes.uni-leipzig.de/en/lsr-collo... #NMRevents #NMRchat #NMR #DNPNMR 🧲
19.11.2024 19:36 — 👍 2 🔁 1 💬 0 📌 2
This approach will be very useful for designing routes to mitigate dendrite formation in solid electrolytes.
17.11.2024 13:01 — 👍 0 🔁 0 💬 0 📌 0
We also find that the SEI is enhanced through charge transfer with the dendrites which allows us to determine its lithium conductivity!🎉🧲🔋#battchat #NMRchat
17.11.2024 13:00 — 👍 2 🔁 0 💬 1 📌 0
PI of Yanai Lab, Professor at the University of Tokyo, Associate Editor of Chem. Phys. Rev., photon upconversion, hyperpolarization, quantum sensing
Senior researcher at ITC SB RAS, Novosibirsk working on parahydrogen-based NMR signal enhancement
Occasionally hardcore tracking in the mountains of Central Asia
Assistant Prof of Biochemistry, Uni of Crete
Biochemistry, biophysics, magnetic resonance.
PhD student @ CICECO University of Aveiro 🇵🇹
Mostly involved with solid-state NMR, computational calculations and adsorption to study materials for CO2 capture 👨🔬🥼
Solid-state and DNP NMR Research Group | Metal Halides | Chalcogenides | Energy Materials | Physical Chemistry | Harvesting | Storage | Perovskites | Kesterites | Chemistry Centre Magnetic Resonance
https://michaelis.chem.ualberta.ca
Professor of Chemistry at @liverpooluni.bsky.social @livunisps.bsky.social Interested in #NMR #DNP #EPR and materials chemistry. https://www.liverpool.ac.uk/people/frederic-blanc Dad of one. 🇫🇷 🇬🇧 🇪🇺
I am a bot that posts recent papers about Nuclear Magnetic Resonance, Electron Paramagnetic Resonance and Dynamic Nuclear Polarization. If you have question/comment ask @dnpfred.bsky.social
Quantum Sensing for Chemistry Lab at Technical University of Munich.
Solid state spin defects for nano and microscale magnetic resonance.
Dad of 2, Prof. @ the University of Houston and National University of Singapore. Energy storage is the game 🔋🪫
Asst. Professor at U.C. Berkeley
NMR spectroscopist, world traveler, birdwatcher, skier and more. Completely moved over from the other site
The Experimental Nuclear Magnetic Resonance Conference (ENC) organizes an annual meeting to promote the exchange of cutting-edge NMR research.
Associate Professor, Weizmann Institute of Science. RNA biologist, interested in what (long) RNA molecules do and how. Father of 4.
CNRS researcher in biomolecular NMR at ENS Paris. Developer of ChemEx. Exploring protein dynamics to uncover biological insights. Science, structure, & molecular motion.
Professor of Chemistry at Iowa State University and Faculty Scientist at Ames National Lab.
Scientist working on #NMR #hyperpolarization and #EPR. Currently based in the USA.
Dad. Lecturer in Chemistry and UKRI Future Leaders Fellow at the University of Aberdeen working on energy materials. Fan of computational materials chemistry, solid-state NMR and bass guitar. Views are my own
Prof. of Analytical Chemistry at Nantes University
Head of MIMM research team and NMR facility at the CEISAM research institute and within MetaboHub
Vice-President of @group-ampere.bsky.social
Deputy Editor of Magn. Reson. Chem.
#NMR #metabolomics
