Plasmonic Electricity Detection System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fluorescence-based bioassays on planar surfaces lack sensitivity and require expensive optical instruments, and biorecognition events are slow, limiting the effectiveness of protein and biomolecule detection.
Innovation Solution
The use of metallic structures with excitable probes that emit fluorescence, luminescence, or phosphorescence signatures, inducing a mirror dipole in the metallic surfaces to generate a plasmonic current, allowing for digital detection of these signals without the need for expensive detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional fluorescence-based bioassays are used on planar surfaces, then the detection can be performed with simple equipment, but the sensitivity is poor and expensive optical instruments are required
Solution Approach 1:
The patent replaces the optical detection system (photodetectors, optical instruments) with an electrical detection system. Metallic structures convert optical signals (fluorescence, luminescence) into electrical signals through photo-induced currents, enabling detection with simple electrical measuring devices instead of expensive optical instruments.
Solution Approach 2:
The patent changes the detection parameter from optical intensity (requiring photodetectors) to electrical current (measurable with simple voltmeters/ammeters). By converting the optical signal to an electrical signal through the metallic structure, the detection parameter is transformed to enable simpler, cheaper measurement equipment.
2Productivity
If traditional fluorescence-based bioassays are used, then the assay can be performed with standard equipment, but the biorecognition events are slow taking several minutes to hours
Solution Approach 1:
The patent replaces the slow optical detection process with an electrical detection process that responds much faster. The photo-induced current in metallic structures provides real-time electrical signals that can be detected immediately upon biomolecular binding, eliminating the need to wait for slow optical signal accumulation.
3Measurement precision
If expensive optical instruments are used for fluorescence detection, then detection sensitivity can be achieved, but the device complexity and cost increase
Solution Approach 1:
The patent substitutes complex optical detectors (photomultiplier tubes, CCD cameras) with simple electrical measurement devices (voltmeters, ammeters). The metallic structure acts as a transducer that converts optical signals to electrical signals, which can be measured with basic electrical instruments, dramatically reducing device complexity and cost.
Solution Approach 2:
The patent uses simple, inexpensive electrical measurement devices instead of expensive, complex optical instruments. The electrical measuring equipment is simpler, more durable, and much cheaper than optical detectors, making the overall system more accessible and practical.
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
This approach enhances sensitivity and speed of bioassay detection, providing a direct and digital readout of binding events, reducing the need for costly optical instruments and enabling real-time monitoring of biomolecular interactions.
Implementation Method 1
The improved sensitivity is made possible by the increase in fluorescence signatures and decreased lifetimes of fluorophores placed in close proximity to PSPs, described by a phenomenon called Metal-Enhanced Fluorescence (MEF).
Implementation Method 2
incorporating plasmon resonant particles (PSPs) into these assays. The interactions of luminescent species with the close-proximity metallic nanoparticles have been extensively studied. These near-field interactions, are for the most part very complex, but can simply be understood phenomenologically as due to a close-proximity fluorophore inducing a mirror dipole in the metal, which in turn radiates the coupled quanta.
Data Source
AI summary
The present invention relates to detection systems and methods that detect fluorescence, luminescence, chemiluminescence or phosphorescence signatures in the form of an electrical signal conducted and emitted from metallic containing surfaces. Thus, the present invention provides for detecting fluorescence digitally and directly without the need for expensive detectors.