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Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization IR-MALDESI
Published on: March 24, 2016
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Optomechanical mass spectrometry
Marc Sansa1, Martial Defoort1,2, Ariel Brenac3
1Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France.
Nature Communications
|July 31, 2020
Summary
This study introduces nano-optomechanical resonators for single-particle mass spectrometry, improving virus analysis. The new method enhances capture area without sacrificing resolution, overcoming limitations of traditional nanomechanical devices.
Area of Science:
- Nanotechnology
- Mass Spectrometry
- Biophysics
Background:
- Nanomechanical mass spectrometry (MS) is suitable for analyzing high-mass species like viruses.
- Traditional one-dimensional nanomechanical resonators face trade-offs between analysis time and mass resolution.
- Complex readout schemes for multiple resonance modes degrade resolution, limiting nanomechanical MS applications.
Purpose of the Study:
- To demonstrate single-particle mass spectrometry using nano-optomechanical resonators.
- To overcome the limitations of traditional nanomechanical devices in analyzing biological samples.
- To enable the analysis of large aspect ratio biological objects.
Main Methods:
- Fabrication of nano-optomechanical resonators using Very Large Scale Integration (VLSI).
- Utilizing the motion sensitivity of optomechanics for particle detection.
- Employing a single resonance mode for mass analysis.
Main Results:
- Achieved single-particle mass spectrometry with nano-optomechanical resonators.
- Demonstrated designs impervious to particle position, stiffness, or shape.
- Showcased a three-fold improvement in capture area compared to traditional beam resonators.
- Maintained mass resolution without degradation despite using a single resonance mode.
Conclusions:
- Nano-optomechanical resonators offer a significant advancement for nanomechanical mass spectrometry.
- This technology enables the analysis of challenging biological samples like viruses with tails and fibrils.
- The improved capture area and preserved resolution expand the applicability of nanomechanical MS.
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