Brillouin Analysis
Brillouin Analysis - Related Videos
08:27
Mechanical Mapping of Spheroids Using Brillouin Spectroscopy
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2025
This article describes a protocol for mechanical characterisation of living spheroids within a 3D matrix using Brillouin micro-spectroscopy. This all-optical method enables spheroid visualisation with microscale resolution and quantitative mechanical properties. This approach has implications for mechanical phenotyping; for instance, determining pathological states of tumor spheroids within a 3D microenvironment.
07:55
High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
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Cited by 7 •
2017
We describe the construction of a rapid continuous-wave-stimulated-Brillouin-scattering (CW-SBS) spectrometer. The spectrometer employs single-frequency diode-lasers and an atomic vapor notch-filter to acquire transmission spectra of turbid/non-turbid samples with high spectral-resolution at speeds up to 100-fold faster than those of existing CW-SBS spectrometers. This improvement enables high-speed Brillouin material analysis.
07:19
Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy
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Cited by 20 •
2016
We present a protocol for the application of Brillouin light scattering spectroscopy to elastin and trypsin-purified type I collagen fibers of the extracellular matrix to extract their full elastic properties.
13:31
High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Cited by 42 •
2015
Here we present a protocol to build a rapid Brillouin spectrometer. Cascading virtually imaged phase array (VIPA) etalons achieve a measurement speed more than 1,000 times faster than traditional scanning Fabry-Perot spectrometers. This improvement provides the means for Brillouin analysis of tissue and biomaterials at low power levels in vivo.
10:39
Automated Analysis of Intracellular Phenotypes of Salmonella Using ImageJ
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Cited by 3 •
2022
Salmonella invades and replicates inside intestinal epithelial cells both in Salmonella-specific vacuoles and free in the cytosol (hyper-replication). A high-throughput fluorescence microscopy-based protocol is described here to quantify the intracellular phenotypes of Salmonella by two complementary image analyses through ImageJ, reaching single-cell resolution and scoring.
FAQs
The frequency shift reflects how incident photons interact with acoustic waves associated with thermally driven phonons. Its value depends on properties such as elastic behavior, acoustic velocity, and density. By measuring this shift, engineers can assess mechanical characteristics without applying direct mechanical contact, supporting the evaluation of solids, liquids, and soft materials.
The linewidth provides information about energy dissipation during the light-acoustic interaction, whereas the frequency shift is associated more directly with acoustic velocity and elastic properties. Considering both measurements helps distinguish materials that may have similar stiffness-related responses but different dissipation behavior, which is particularly relevant when evaluating viscoelasticity.
Thermally driven phonons provide the acoustic excitations that scatter the incident photons. This interaction produces the shifted optical signal needed for analysis, so the measurement can probe mechanical behavior without externally driving the sample. The resulting spectral features connect microscopic acoustic activity with properties such as elasticity, acoustic velocity, and energy dissipation.
The principal measurements are the frequency shift and spectral linewidth of the Brillouin-shifted light. The shift supplies information connected to acoustic velocity and elastic properties, while the linewidth indicates energy dissipation. Interpreting these features allows researchers to evaluate stiffness, viscoelasticity, density, and mechanical stress in the examined material.
It is useful when engineers need noncontact characterization of mechanical properties in solids, liquids, or soft materials. The technique can assess stiffness, viscoelasticity, density, and stress without physically loading the sample. That capability supports materials testing and investigations of mechanical behavior where direct contact could be undesirable or difficult.
Optical-fiber implementations support measurements relevant to structural health monitoring, while microscopy provides spatially resolved characterization of localized material behavior. These formats extend the method beyond bulk measurements and help engineers examine mechanical variations in structures, soft materials, and micro- or nanoscale regions. The resulting information can guide materials evaluation and stress assessment.