Flexible Carrier for Single Molecule Detection on Irregular Surfaces
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Solution Overview
Problem
Current methods for single molecule detection using Raman spectroscopy are limited by the need for rigid substrates, which restrict real-time, in situ, or in vivo detection on irregular surfaces, as they require extracting molecules and cannot handle objects with anomalous shapes.
Innovation Solution
A flexible carrier is developed with a substrate, a middle layer, and a metal layer, featuring a patterned bulge structure that allows for surface-enhanced Raman scattering, enabling detection on irregular surfaces by using a carbon nanotube composite structure and a metal layer to enhance Raman signal, allowing for in situ detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid substrate is used for single molecule detection, then the structural stability is improved, but the adaptability to irregular surfaces and real-time in situ detection is worsened
Solution Approach 1:
The patent applies this principle by replacing the traditional rigid substrate with a flexible substrate that can be bent or deformed to match irregular surface geometries. This flexible substrate maintains structural integrity while enabling adaptation to curved or anomalous surfaces for real-time in situ detection.
Solution Approach 2:
The patent employs composite materials by combining the flexible substrate with a metal layer (such as silver or gold) and potentially other functional materials to create a carrier that simultaneously provides mechanical flexibility, structural stability, and enhanced optical properties for Raman scattering.
2Manufacturing precision
If a rigid substrate is used, then the manufacturing precision is improved, but the ease of operation for in situ detection is worsened
Solution Approach 1:
The flexible substrate maintains manufacturing precision through controlled fabrication processes while enabling easy in situ operation by allowing the carrier to be conformally applied to irregular surfaces and removed without damage, facilitating real-time detection workflows.
3Measurement precision
If molecule extraction is required for detection, then the measurement precision is improved, but the loss of time and productivity are worsened
Solution Approach 1:
The flexible carrier acts as an intermediary between the sample and the detection system. It allows molecules to be detected in their natural environment on irregular surfaces without requiring extraction, thereby maintaining measurement precision while eliminating the time-consuming extraction step and enabling real-time detection.
4Measurement precision
If a metal layer is added to enhance Raman scattering, then the measurement precision is improved, but the device complexity is worsened
Solution Approach 1:
The patent uses composite materials by combining the flexible substrate with a metal layer (such as silver or gold) to create a carrier that simultaneously provides mechanical flexibility, structural stability, and enhanced optical properties for Raman scattering.
Solution Approach 2:
The metal layer is strategically positioned at specific locations on the flexible substrate where it is most needed for enhancing Raman scattering signals. This localized approach maintains measurement precision while minimizing the overall complexity and material usage.
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 flexible carrier enhances Raman scattering, enabling real-time detection of single molecules on irregular surfaces without the need for molecule extraction, improving detection efficiency and versatility.
Implementation Method 1
A flexible carrier is developed with a substrate, a middle layer, and a metal layer, featuring a patterned bulge structure that allows for surface-enhanced Raman scattering, enabling detection on irregular surfaces
Data Source
AI summary
A method for making carrier for use in single molecule detection is related. The method includes following steps: firstly, placing a middle layer on a substrate; secondly, providing a carbon nanotube composite structure, wherein the carbon nanotube composite structure includes a carbon nanotube structure and a protective layer coated on the carbon nanotube structure, the carbon nanotube structure includes a plurality of carbon nanotubes intersected with each other and defines a plurality of openings; thirdly, placing the carbon nanotube composite structure on a surface of the middle layer, wherein parts of the surface are exposed through the plurality of openings; fourthly, forming the patterned bulge by dry etching the middle layer using the carbon nanotube composite structure as a mask, wherein the patterned bulge includes a plurality of strip-shaped bulges intersected with each other; depositing the metal layer on the patterned bulge.