Source 1review2022The Journal of Chemical Physics
Toolkit/spectrally resolved single-particle fluorescence microscopy for QCSE voltage sensing
spectrally resolved single-particle fluorescence microscopy for QCSE voltage sensing
Also known as: home-built fluorescence microscope, spectrally resolved QCSE imaging
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
A dedicated home-built fluorescence microscope records spectrally resolved images to measure the QCSE induced spectral shift at the single-particle level.
Usefulness & Problems
Why this is useful
This imaging method records spectrally resolved fluorescence images so QCSE-induced spectral shifts can be measured from individual nanoparticles. It is the readout platform paired with the inorganic voltage nanosensor approach.; measuring QCSE-induced spectral shifts; single-particle optical voltage readout
Source:
This imaging method records spectrally resolved fluorescence images so QCSE-induced spectral shifts can be measured from individual nanoparticles. It is the readout platform paired with the inorganic voltage nanosensor approach.
Source:
measuring QCSE-induced spectral shifts
Source:
single-particle optical voltage readout
Problem solved
It enables single-particle detection of voltage-linked spectral shifts that would be missed by non-spectral bulk readouts.; readout of single-particle QCSE voltage responses
Source:
It enables single-particle detection of voltage-linked spectral shifts that would be missed by non-spectral bulk readouts.
Source:
readout of single-particle QCSE voltage responses
Problem links
readout of single-particle QCSE voltage responses
LiteratureIt enables single-particle detection of voltage-linked spectral shifts that would be missed by non-spectral bulk readouts.
Source:
It enables single-particle detection of voltage-linked spectral shifts that would be missed by non-spectral bulk readouts.
Published Workflows
Objective: Develop nanoparticle-based optical voltage sensors for non-genetic, single-particle membrane-potential sensing with high temporal and spatial resolution and targeted subcellular readout.
Why it works: The review describes a coupled materials-and-methods strategy in which sensing particles are engineered for field sensitivity, surface ligands are designed to improve localization and compartmentalization, and optical readout methods are tailored to the sensing mechanism. This combination is presented as necessary for translating nanosensors into practical membrane-potential measurements at targeted sites.
quantum confined Stark effect sensing of local electric fieldsFRET-based sensing of local electric fieldsenhanced charge separationanisotropic facet-selective coatingtheoretical simulation-guided ligand designspectrally resolved fluorescence imagingsingle-particle optical readout
Stages
- 1.simulation-guided surface-ligand design(library_design)
The abstract states that biomaterial-based surface ligands are designed from theoretical simulations to support anisotropic facet-selective coating and effective compartmentalization.
Selection: design biomaterial-based surface ligands using theoretical simulations
- 2.hybrid nanobiomaterial construction and coating(library_build)
The review describes hybrid nanobiomaterials that satisfy anisotropic facet-selective coating, which is presented as enabling effective compartmentalization beyond non-specific staining.
Selection: generate hybrid nanobiomaterials with anisotropic facet-selective coating
- 3.mechanism-matched optical readout setup(functional_characterization)
The abstract explicitly states that a dedicated home-built fluorescence microscope is used to record spectrally resolved images for QCSE measurements at the single-particle level.
Selection: measure QCSE-induced spectral shifts with a dedicated spectrally resolved fluorescence microscope
- 4.cell and neuron membrane-potential response testing(confirmatory_validation)
The abstract reports clear photoluminescence intensity changes in self-spiking and patched HEK293 cells and cortical neurons after staining with hybrid nanobiomaterials.
Selection: look for photoluminescence intensity changes in response to membrane-potential changes after staining cells with hybrid nanobiomaterials
- 5.targeted subcellular recording at synapses and spines(secondary_characterization)
The abstract highlights nanodisk-based non-invasive membrane-potential recording from individual targeted sites such as synapses and spines, indicating a more demanding targeted-use stage.
Selection: demonstrate non-invasive membrane-potential recording from individual targeted sites
- 6.action-potential recording milestone(decision_gate)
The abstract explicitly states that both QCSE- and FRET-based voltage nanosensors still need to reach this milestone.
Selection: ability to record individual action potentials from individual targeted sites
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Techniques
Functional AssayTarget processes
No target processes tagged yet.
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensor
The abstract explicitly requires a dedicated home-built fluorescence microscope with spectral imaging capability.; requires a dedicated home-built fluorescence microscope; requires spectrally resolved imaging capability
the abstract does not provide protocol details or benchmark comparisons to other microscope designs
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Hybrid nanobiomaterials stained into self-spiking and patched HEK293 cells and cortical neurons show photoluminescence intensity changes in response to membrane-potential changes.
Nanodisks have enabled non-invasive membrane-potential recording from individual targeted sites such as synapses and spines.
A dedicated home-built fluorescence microscope can record spectrally resolved images to measure QCSE-induced spectral shifts at the single-particle level.
Biomaterial-based surface ligands designed from theoretical simulations enable anisotropic facet-selective coating and effective compartmentalization beyond non-specific staining.
Both QCSE-based and FRET-based voltage nanosensors still need to achieve recording of individual action potentials from individual targeted sites.
Inorganic voltage nanosensors use the quantum confined Stark effect to sense local electric fields.
Organic voltage nanosensors based on polystyrene beads and nanodisk technology use FRET to sense local electric fields.
Engineered inorganic nanoparticles achieve substantial single-particle voltage sensitivity at room temperature, including about 2% spectral Stark shift and up to about 30% delta F over F per 160 mV.
delta F over F ~30%spectral Stark shift ~2%
Voltage-sensing FRET pairs achieve up to about 35% delta F over F per 120 mV in cultures.
delta F over F ~35%
Nanoparticle-based inorganic and organic voltage sensors are being developed as potential tools for non-genetic optogenetics and single-particle optical electrophysiology.
Approval Evidence
1 source1 linked approval claimfirst-pass slug spectrally-resolved-single-particle-fluorescence-microscopy-for-qcse-voltage-sensing
A dedicated home-built fluorescence microscope records spectrally resolved images to measure the QCSE induced spectral shift at the single-particle level.
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assay capabilitysupports
A dedicated home-built fluorescence microscope can record spectrally resolved images to measure QCSE-induced spectral shifts at the single-particle level.
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Comparisons
Source-stated alternatives
The abstract does not name a direct alternative microscope platform, but it contrasts this QCSE spectral-shift readout with FRET-based intensity readouts used by organic voltage nanosensors.
Source:
The abstract does not name a direct alternative microscope platform, but it contrasts this QCSE spectral-shift readout with FRET-based intensity readouts used by organic voltage nanosensors.
Source-backed strengths
supports spectrally resolved single-particle measurements
Source:
supports spectrally resolved single-particle measurements
Compared with FRET
The abstract does not name a direct alternative microscope platform, but it contrasts this QCSE spectral-shift readout with FRET-based intensity readouts used by organic voltage nanosensors.
Shared frame: source-stated alternative in extracted literature
Strengths here: supports spectrally resolved single-particle measurements.
Relative tradeoffs: the abstract does not provide protocol details or benchmark comparisons to other microscope designs.
Source:
The abstract does not name a direct alternative microscope platform, but it contrasts this QCSE spectral-shift readout with FRET-based intensity readouts used by organic voltage nanosensors.
Compared with organic voltage nanosensors
The abstract does not name a direct alternative microscope platform, but it contrasts this QCSE spectral-shift readout with FRET-based intensity readouts used by organic voltage nanosensors.
Shared frame: source-stated alternative in extracted literature
Strengths here: supports spectrally resolved single-particle measurements.
Relative tradeoffs: the abstract does not provide protocol details or benchmark comparisons to other microscope designs.
Source:
The abstract does not name a direct alternative microscope platform, but it contrasts this QCSE spectral-shift readout with FRET-based intensity readouts used by organic voltage nanosensors.
Ranked Citations
- 1.