Flexible Carrier for Single Molecule Detection
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Solution Overview
Problem
Current Raman spectroscopy methods for single molecule detection require rigid substrates, limiting real-time, in situ, or in vivo detection of molecules with irregular shapes, as they necessitate extraction of molecules from the object.
Innovation Solution
A flexible carrier with a substrate, middle layer, and metal layer is developed, featuring a patterned bulge structure that enhances surface plasmon resonance for improved Raman scattering, allowing detection on irregular surfaces without extracting molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid substrate is used for carrying single molecules, then the structural stability and manufacturing precision are improved, but the adaptability to irregular surfaces and real-time in situ detection capability deteriorate
Solution Approach 1:
The patent transforms the substrate from a rigid static structure to a flexible dynamic one by replacing traditional rigid materials (glass, silicon, quartz) with flexible materials (polymer films, elastic substrates). This enables the substrate to dynamically adapt its shape to irregular surfaces during detection, while maintaining structural integrity through careful material selection and thickness control (e.g., 10-100 micrometer polymer films).
Solution Approach 2:
The patent directly applies flexible thin films as the substrate carrier, using polymer films or elastic substrates that can conform to irregular surfaces. This replaces the conventional rigid shell approach, enabling the detection system to adapt to various surface geometries while maintaining the necessary mechanical stability for molecular carrying and detection.
2Ease of manufacture
If a rigid substrate is used, then the manufacturing precision and ease of manufacture are improved, but the ease of operation for real-time in situ detection deteriorates
Solution Approach 1:
The substrate is designed to be flexible and adaptable rather than rigid, allowing it to be easily applied to various surfaces in real-time detection scenarios. The flexible polymer films can be manually handled and conform to different geometries, greatly improving operational ease for in situ detection while maintaining manufacturability through standard flexible film fabrication techniques.
Solution Approach 2:
By using flexible thin films as the substrate, the patent enables easy handling and application to irregular surfaces during operation. These flexible substrates can be easily manipulated, positioned, and adapted to different detection scenarios, significantly improving the ease of operation for real-time in situ detection compared to rigid substrates that require precise mechanical mounting.
3Measurement precision
If molecules are extracted from the object for detection, then the measurement precision is improved, but the loss of time for extraction and the inability to perform real-time detection worsen
Solution Approach 1:
The flexible substrate enables the detection system to directly interact with and detect molecules on their native surfaces without requiring extraction or sample preparation. The substrate carries out the detection function in situ, eliminating the time-consuming extraction step while maintaining single molecule detection precision through its flexible contact with the sample surface.
Solution Approach 2:
The flexible substrate is designed to be pre-configured with detection capabilities and can be directly applied to the sample surface before detection begins. This preliminary preparation eliminates the need for time-consuming molecule extraction and preparation steps, allowing direct in situ detection while maintaining measurement precision.
4Adaptability or versatility
If a flexible carrier is used, then the adaptability to irregular surfaces and real-time detection capability are improved, but the structural stability and manufacturing precision deteriorate
Solution Approach 1:
The patent uses flexible polymer films and thin film structures that can be manufactured with sufficient precision for detection purposes while maintaining flexibility. The thin film nature (10-100 micrometers) provides adequate structural control without requiring the high precision of rigid substrates, enabling both adaptability to irregular surfaces and acceptable manufacturing precision through standard flexible film fabrication techniques.
Solution Approach 2:
The flexible substrate accepts a different manufacturing approach optimized for flexible materials rather than rigid materials. This dynamic approach uses polymer processing and flexible film fabrication techniques that achieve sufficient precision for detection while maintaining the flexibility needed for irregular surface adaptation, rather than attempting to apply rigid substrate manufacturing standards to flexible materials.
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
Enables real-time, in situ detection of single molecules on irregular surfaces with enhanced Raman scattering, improving the flexibility and effectiveness of molecular detection.
Implementation Method 1
A flexible carrier with a substrate, middle layer, and metal layer is developed, featuring a patterned bulge structure that enhances surface plasmon resonance for improved Raman scattering
Implementation Method 2
A laser irradiation is supplied to the single molecule samples by a Raman detection system to cause a Raman scattering and produce a Raman spectroscopy
Data Source
AI summary
A carrier for use in single molecule detection is related. The carrier includes a substrate; a middle layer, on the substrate; and a metal layer, on the middle layer; wherein the substrate is a flexible substrate, the middle layer includes a base and a patterned bulge on the base, the patterned bulge includes a plurality of strip-shaped bulges, the metal layer is on the patterned bulge, the carrier further includes a carbon nanotube composite structure between the metal layer and the patterned bulge.