3D Nanoplasmonic Biosensor Filopodia Detection
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Solution Overview
Problem
Traditional disease screening methods are invasive, time-consuming, and not suitable for point-of-care or low-cost setups, making them unsuitable for daily applications, especially in cancer diagnostics where detecting filopodia is challenging due to their thin size and sensitivity requirements.
Innovation Solution
A 3D nanoplasmonic biosensor with asymmetrical pillar structures and microposts is designed to detect filopodia by altering optical properties, using a metal layer and cell adhesion coatings to separate and facilitate the extension of filopodia onto a detection surface, enabling high-sensitivity detection of cancer cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional screening methods are used, then accurate and sensitive results are achieved, but the procedures are invasive, time-consuming, and require complex laboratory instruments
Solution Approach 1:
The patent replaces complex mechanical and optical laboratory instruments with a plasmonic biosensor that uses surface plasmon resonance phenomena. The sensor detects filopodia directly through optical property changes in the plasmonic structures, eliminating the need for sophisticated laboratory equipment while maintaining high detection sensitivity.
Solution Approach 2:
The invention changes the detection parameter from complex multi-step measurements to direct optical property monitoring of plasmonic structures. By monitoring refractive index changes and optical resonance shifts caused by filopodia interaction with the plasmonic array, the system achieves accurate detection with simplified instrumentation.
2Measurement precision
If traditional screening methods are used, then accurate detection is achieved, but the procedures are time-consuming and not suitable for daily applications
Solution Approach 1:
The biosensor is pre-configured with plasmonic structures and separator arrays positioned to optimally detect filopodia. The cell adhesion coating is pre-applied to facilitate immediate cell attachment upon contact, eliminating preparation time during actual screening operations and enabling rapid daily testing.
Solution Approach 2:
The invention extracts and isolates the specific detection function from complex laboratory procedures. By using a dedicated plasmonic biosensor array that directly detects filopodia optical signatures, the system eliminates time-consuming intermediate steps and provides rapid results suitable for daily clinical applications.
3Volume of moving object
If the detection surface is placed close to the base for compact design, then device size is reduced, but the separator cannot effectively separate the cell main portion from the detection surface
Solution Approach 1:
The patent introduces a vertical dimension with the separator array positioned between the base and detection surface. This 3D configuration allows the sensor to maintain compact overall thickness while creating a controlled spatial arrangement where the separator array vertically separates the cell body from the detection surface, enabling specific filopodia detection without increasing footprint.
Solution Approach 2:
The asymmetric positioning of the separator array relative to the plasmonic structure array creates optimal detection geometry. The separators are strategically placed at specific distances and positions to allow filopodia extension while blocking cell body access, achieving high detection specificity within a compact form factor through asymmetric spatial design.
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 biosensor achieves high sensitivity and specificity in detecting filopodia, allowing for accurate cancer diagnostics with a fast and cost-effective method, distinguishing cancer cells from normal cells based on filopodia density and distribution.
Implementation Method 1
an array of plasmonic structures arranged on a base, and defining a detection surface distanced from the base; and a separator arranged to separate at least a main portion of a cell from the detection surface; wherein the biosensor is arranged to detect, based on a change of an optical property of the array of plasmonic structures
Data Source
AI summary
A method of fabricating an array of plasmonic structures, a biosensor and a method of fabricating the biosensor. The biosensor includes: an array of plasmonic structures arranged on a base, and defining a detection surface distanced from the base; a separator arranged to separate at least a main portion of a cell from the detection surface; wherein the biosensor is arranged to detect, based on a change of an optical property of the array of plasmonic structures, in response to one or more protrusions extending from the main portion of the cell reaching the detection surface.