Deformable Photonic Crystal Microscope for Cellular Force Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for measuring cellular forces face challenges such as complexity in conversion of deformation to force, reliance on specialized equipment, difficulty in high-resolution imaging, and interference with cellular physiology, limiting their applicability and accuracy.
Innovation Solution
A photonic crystal microscope utilizing a deformable photonic crystal substrate that reflects light to capture mechanical interactions, enabling subcellular measurement precision and simplifying algorithm complexity by providing a known initial state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If deformation-based methods are used to measure cellular forces, then the measurement approach is simple and does not require complex calculations, but the accuracy is compromised due to assumptions about material properties and inability to measure force fluctuations
Solution Approach 1:
The patent replaces traditional mechanical deformation measurement methods with an optical measurement system. A photonic crystal substrate with embedded fluorescent beads is used, where cellular forces cause substrate deformation that is optically detected through fluorescent bead displacement. This substitution enables direct force measurement through optical tracking rather than indirect deformation assessment, resolving the contradiction between simplicity and accuracy.
Solution Approach 2:
The patent introduces fluorescent beads as intermediary markers embedded in the photonic crystal substrate. These beads serve as mediators that translate mechanical substrate deformation into optically detectable positional changes. The beads' fluorescence allows precise tracking of substrate displacement caused by cellular forces, enabling accurate force measurement while maintaining experimental simplicity.
2Duration of action of stationary object
If external force sensors are used to measure tissue contractile forces, then continuous and long-term measurement is achieved, but the system complexity increases and throughput is limited due to manual mounting requirements
Solution Approach 1:
The patent merges the substrate function with the sensing function by integrating fluorescent beads directly into the photonic crystal substrate matrix. This combination eliminates the need for separate external force sensors and manual mounting procedures. The substrate itself becomes the sensor, allowing continuous measurement while reducing system complexity and enabling high-throughput automated imaging of multiple samples simultaneously.
3Productivity
If cantilevers are used to measure cellular forces, then multiple forces can be measured simultaneously and the system size is reduced, but fabrication complexity increases due to requirements for microfabrication facilities
Solution Approach 1:
The patent uses fluorescent beads as simplified copies or proxies for complex cantilever structures. Instead of fabricating intricate micro-cantilevers requiring specialized facilities, the invention employs easily manufactured photonic crystal substrates with embedded fluorescent beads. The beads replicate the force-sensing function of cantilevers through their positional response to substrate deformation, maintaining simultaneous measurement capability while dramatically simplifying fabrication processes.
4Measurement precision
If high-resolution imaging is used in TFM to achieve subcellular measurement precision, then measurement accuracy is improved, but phototoxicity increases and flux is limited
Solution Approach 1:
The patent employs periodic or pulsed illumination instead of continuous high-intensity lighting. The fluorescent beads in the photonic crystal substrate can be imaged with lower intensity and longer exposure times, or using pulsed illumination sequences. This periodic imaging approach maintains subcellular measurement precision while significantly reducing cumulative phototoxicity to live cells compared to continuous high-resolution TFM imaging.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The photonic crystal microscope achieves high flux and accuracy in cellular biomechanics measurement with reduced noise sensitivity and phototoxicity, allowing for accurate reproduction of physiological environments and overcoming limitations of existing TFM technologies.
Implementation Method 1
the photonic crystal substrate is configured to reflect the probe light to the imaging assembly
Implementation Method 2
the photonic crystal substrate being deformable when the to-be-measured cell grows on the photonic crystal substrate
Data Source
AI summary
Disclosed are a photonic crystal microscope and a method of measuring cellular forces. The photonic crystal substrate includes a photonic crystal substrate, a stage, a probe light source, and an imaging assembly, the photonic crystal substrate being disposed above the stage, the probe light source and the imaging assembly being sequentially disposed at a side of the stage opposite the photonic crystal substrate, the photonic crystal substrate being configured to culture a to-be-measured cell, the photonic crystal substrate being deformable when the to-be-measured cell grows on the photonic crystal substrate; the probe light source is configured to emit probe light to the photonic crystal substrate; the photonic crystal substrate is configured to reflect the probe light to the imaging assembly; the imaging assembly is configured to receive the light reflected from the photonic crystal substrate to perform imaging.