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research article

Towards optical MAS magnetic resonance using optical traps

Marti, Lea
•
Solmaz, Nergiz Sahin
•
Kern, Michal
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December 28, 2023
Journal Of Magnetic Resonance Open

Higher magic angle spinning (MAS) frequencies than currently available are desirable to improve spectral resolution in NMR and EPR systems. While conventional strategies employ pneumatic spinning limited by fluid dynamics, this paper demonstrates the development of an optical spinning technique in which vacuum quality dictates the maximum achievable spinning frequency. Using optical traps, we levitated a range of micron-sized samples. Under vacuum we achieved optical rotation of a single 10 mu m diameter particle of vaterite at several mbar up to hundreds of Hz and of 20 mu m diameter SiO2 particles at <= 10(- 2) mbar at several kHz. At ambient conditions, we optically levitated gamma-irradiated alanine particles of 20-50 mu m diameter. Additionally, using a single chip EPR detector operating at 11 GHz, we measured the EPR spectrum for a 30 mu m gamma-irradiated alanine particle in contact with the chip surface (i.e., without optical levitation) in a single scan lasting 92 s. These observations suggest that a gamma-irradiated alanine particle having a diameter in the order of 30 mu m is a promising candidate for our aim of demonstrating the first magnetic resonance experiment on optically levitated samples. Furthermore, we discuss strategies, limitations, and the potential of implementing MAS with optical traps for NMR and EPR.

  • Details
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Type
research article
DOI
10.1016/j.jmro.2023.100145
Web of Science ID

WOS:001166111000001

Author(s)
Marti, Lea
Solmaz, Nergiz Sahin
Kern, Michal
Chu, Anh
Farsi, Reza  
Hengel, Philipp
Gao, Jialiang
Alaniva, Nicholas
Urban, Michael A.
Gunzenhauser, Ronny
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Date Issued

2023-12-28

Publisher

Elsevier

Published in
Journal Of Magnetic Resonance Open
Volume

18

Article Number

100145

Subjects

Life Sciences & Biomedicine

•

Physical Sciences

•

Technology

•

Optical Trapping

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Optical Magic Angle Spinning

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Epr-On-A-Chip

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMIS1  
FunderGrant Number

Schweizerischer Nationalfonds zur Forderung der Wissenschaftlichen Forschung

200021_201070/1

ETH Research Grant

ETH-11 23-1

Gunthard Foundation

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Available on Infoscience
March 18, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/206455
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