Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Single-spin electron paramagnetic resonance spectrum with kilohertz spectral resolution

The comparison of the paramagnetic resonance spectrum between the traditional method (top) and the new method (bottom) of noise-insensitive. It clearly shows that the spectral resolution has been significantly improved, and more precise coupling information has been observed.

CREDIT
DU Jiangfeng et al.
The comparison of the paramagnetic resonance spectrum between the traditional method (top) and the new method (bottom) of noise-insensitive. It clearly shows that the spectral resolution has been significantly improved, and more precise coupling information has been observed. CREDIT DU Jiangfeng et al.

Abstract:
A high-resolution paramagnetic resonance detection method based on the diamond nitrogen-vacancy (NV) color center quantum sensor was proposed and experimentally implemented in a study led by academician DU Jiangfeng from CAS Key Laboratory of Microscale Magnetic Resonance of University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS).

Single-spin electron paramagnetic resonance spectrum with kilohertz spectral resolution

Hefei, P.R.China | Posted on June 19th, 2020

The researchers obtained the single-spin paramagnetic resonance spectrum with kilohertz (kHz) spectral resolution. The study was published in Science Advances.

A major development trend of electron paramagnetic resonance spectroscopy is to get as accurate information as possible from as few samples as possible, which requires enhancing both spatial resolution and spectral resolution. In recent decades, the spatial resolution has been improved considerably, and the detection of single-spin paramagnetic resonance even reached to the nanoscale due to the emergence of new detection technology. However, the spectral resolution remains in the megahertz (MHz) scale because of uncontrollable external noise. Therefore, a new method has to be found in order to break through the current limitation of spectral resolution caused by noise.

One more direct and effective way is to make the measured spin naturally insensitive to external noise. A certain kind of spin states can resist the disturbance of external magnetic field noise, and the spectral lines generated by electron when transiting between these spin states will be narrowed. It has been reported that this phenomenon also exists for a kind of paramagnetic material under zero magnetic field in previous research. However, the detection sensitivity of traditional paramagnetic resonance technology is related to the magnitude of magnetic field, and the detection efficiency in zero field is extremely low, which limits the practical application.

Therefore, the researchers used NV color center quantum sensor in diamond to detect paramagnetic resonance. Previous work has proved that the NV color center still has single-spin level detection sensitivity even at zero field.

In order to observe the narrowing of the spectral lines and realize high-resolution spectroscopy detection, it is also necessary to eliminate the broadening of the spectral line caused by the NV sensor itself. Inspired by the correlation detection in nuclear magnetic resonance (NMR), DU's team designed a paramagnetic resonance correlation sequence suitable for zero field, which greatly suppressed the intrinsic broadening of NV sensors.

Using this new method, they successfully detected the narrowing transition of the electron spin of a single nitrogen atom in diamond in their experiment. Compared with the traditional method, the spectral resolution has been improved considerably by 27 times, reaching 8.6 kHz.

This experimental results showed that the paramagnetic resonance technology based on NV quantum sensor can achieve both high spatial and high spectral resolution. At the same time, this method is not limited by harsh environmental conditions (such as vacuum or low temperature), which is very competitive in biological applications. More detailed information of structural, dynamic changes and local environmental characteristics of a single molecule can be analyzed.

####

For more information, please click here

Contacts:
Jane FAN Qiong

86-551-636-07280

Copyright © University of Science and Technology of China (USTC)

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

Imaging

Who stole the light? Self-induced ultrafast demagnetization limits the amount of light diffracted from magnetic samples at soft x-ray energies September 18th, 2020

Nano-microscope gives first direct observation of the magnetic properties of 2D materials: Discovery means new class of materials and technologies September 18th, 2020

News and information

Nano-microscope gives first direct observation of the magnetic properties of 2D materials: Discovery means new class of materials and technologies September 18th, 2020

Physicists make electrical nanolasers even smaller September 18th, 2020

Shape matters for light-activated nanocatalysts - Study: Pointed tips on aluminum 'octopods' increase catalytic reactivity September 18th, 2020

Possible Futures

Nano-microscope gives first direct observation of the magnetic properties of 2D materials: Discovery means new class of materials and technologies September 18th, 2020

Physicists make electrical nanolasers even smaller September 18th, 2020

Shape matters for light-activated nanocatalysts - Study: Pointed tips on aluminum 'octopods' increase catalytic reactivity September 18th, 2020

Aberrant electronic and structural alterations in pressure tuned perovskite NaOsO3 September 18th, 2020

Sensors

An improved wearable, stretchable gas sensor using nanocomposites August 28th, 2020

Nano-diamond self-charging batteries could disrupt energy as we know it August 25th, 2020

Synthesis of organophilic carbon nanodots with multi-band emission from tomato leaves August 21st, 2020

InnovationLab and Heidelberg collaborate on industrial production of printed and organic sensors: Firms achieve volume and price breakthroughs in manufacture of printed sensors August 19th, 2020

Discoveries

Nano-microscope gives first direct observation of the magnetic properties of 2D materials: Discovery means new class of materials and technologies September 18th, 2020

Physicists make electrical nanolasers even smaller September 18th, 2020

Shape matters for light-activated nanocatalysts - Study: Pointed tips on aluminum 'octopods' increase catalytic reactivity September 18th, 2020

Aberrant electronic and structural alterations in pressure tuned perovskite NaOsO3 September 18th, 2020

Announcements

Nano-microscope gives first direct observation of the magnetic properties of 2D materials: Discovery means new class of materials and technologies September 18th, 2020

Physicists make electrical nanolasers even smaller September 18th, 2020

Shape matters for light-activated nanocatalysts - Study: Pointed tips on aluminum 'octopods' increase catalytic reactivity September 18th, 2020

Aberrant electronic and structural alterations in pressure tuned perovskite NaOsO3 September 18th, 2020

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Who stole the light? Self-induced ultrafast demagnetization limits the amount of light diffracted from magnetic samples at soft x-ray energies September 18th, 2020

Nano-microscope gives first direct observation of the magnetic properties of 2D materials: Discovery means new class of materials and technologies September 18th, 2020

Physicists make electrical nanolasers even smaller September 18th, 2020

Shape matters for light-activated nanocatalysts - Study: Pointed tips on aluminum 'octopods' increase catalytic reactivity September 18th, 2020

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project