Needle-like SERS Probe Fixing Stand for Raman Detection
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Solution Overview
Problem
Portable Raman instruments face limitations in detecting trace substances in complex systems due to low sensitivity and interference from planar SERS probes, which cannot effectively target internal samples or distinguish between target and background signals.
Innovation Solution
A Raman detection system incorporating a needle-like SERS probe with a fixing light shielding stand that includes a deep groove structure and a latch-type fixed structure to securely hold the probe, allowing for precise insertion and alignment with the Raman spectrometer, reducing background interference and enhancing signal focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a planar SERS probe is used, then the detection can be performed on surface samples, but the internal information of bulk samples cannot be obtained and background interference signals are adsorbed together with target substances
Solution Approach 1:
The patent inverts the traditional planar probe design by adopting a needle-like configuration. This inversion allows the probe to penetrate bulk samples and access internal structures, transforming the detection capability from surface-only to internal-accessible, thereby eliminating background interference from sample surfaces while obtaining target substance signals from within the sample matrix.
Solution Approach 2:
The needle-like SERS probe is segmented into a slender body with a specific tip structure that can penetrate bulk samples. This segmentation enables the probe to physically separate the detection interface from the bulk sample matrix, allowing selective access to internal regions while minimizing adsorption of background signals on the probe surface.
2Ease of operation
If existing fixing devices designed for planar SERS probes are used, then the planar probe can be held, but the needle-like SERS probe cannot be properly fixed or aligned
Solution Approach 1:
The fixing device is designed with multi-functional capabilities: it can hold the needle-like SERS probe securely, provide light shielding to eliminate ambient light interference, and ensure precise alignment with the Raman spectrometer. The integrated design combines multiple functions into a single device that adapts to the specific geometry of the needle-like probe while maintaining ease of operation.
Solution Approach 2:
The fixing device acts as an intermediary between the needle-like SERS probe and the Raman spectrometer. It provides a standardized interface that facilitates secure mounting and precise positioning, mediating the interaction between the probe and the detection instrument while ensuring optimal alignment and signal collection.
3Measurement precision
If a needle-like SERS probe is used, then internal samples can be detected and background interference is reduced, but existing fixing devices cannot accommodate the probe
Solution Approach 1:
The patent merges the fixing function, light shielding function, and alignment function into a single integrated device. By combining these functions, the device achieves the necessary complexity to accommodate and properly position the needle-like SERS probe while maintaining operational simplicity. The merged design eliminates the need for multiple separate components, reducing overall system complexity while achieving the required detection precision.
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 system achieves higher sensitivity and faster detection times, enabling the analysis of internal samples like meat products with improved signal intensity and reduced interference, expanding the application of SERS technology to complex systems.
Implementation Method 1
Researchers have found that a noble metal with nanoscale rough surfaces (called 'SERS probe') could enhance the Raman spectrum signals by one million times
Implementation Method 2
fixing light shielding stand... reducing background interference
Data Source
AI summary
A Raman detection system has a Raman spectrometer and a fixing light shielding stand. One end of the fixing light shielding stand is fixedly connected to the Raman spectrometer, and the other end is disposed with an entrance groove for a needle-like SERS probe to enter. A slot for fixing the needle-like SERS probe is formed at an end of the entrance groove, and the slot and the needle-like SERS probe match in shape and size. The Raman detection system has a fixing light shielding device with a dark color groove and a focal length. The groove can be used for limiting the rolling of the curved surface structure of the needle-like SERS probe. A laser can be focused on the curved surface more accurately by adjusting the distance from the instrument detector to the SERS probe.