SERS-Active PCF Probe with Biopsy Needle for Analyte Detection
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Solution Overview
Problem
Current SERS platforms incorporating hollow-core photonic crystal fibers lack improved technical properties for enhanced sensitivity and specificity in detecting analytes, particularly in biological samples.
Innovation Solution
Development of SERS-active photonic crystal fiber (PCF) probes with a patterned core and air holes, coated with silica glass and noble metal nanoparticles, immobilized via silane coupling agents, and functionalized with analyte-binding molecules for integrated sample collection and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional hollow-core photonic crystal fibers are used as SERS platforms, then the basic SERS detection function is achieved, but the sensitivity and specificity for detecting analytes in biological samples are insufficient
Solution Approach 1:
The patent applies local quality by creating distinct functional zones within the photonic crystal fiber: the core region is functionalized with SERS-active materials for signal generation, while the cladding contains analyte-binding molecules for specific capture. This spatial differentiation of functions enhances both sensitivity (through concentrated SERS activity) and specificity (through targeted analyte binding), resolving the contradiction between detection performance and structural simplicity.
Solution Approach 2:
The patent employs composite materials by integrating multiple functional components within the fiber structure: photonic crystal glass matrix, SERS-active metallic nanoparticles (gold or silver), and biofunctional molecules (antibodies, aptamers). This composite approach enables simultaneous achievement of high detection sensitivity through plasmonic enhancement and high specificity through biological recognition, overcoming the limitations of conventional single-material SERS platforms.
2Measurement precision
If the PCF probe structure with multiple functional layers is implemented, then detection sensitivity is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-functionalizing the photonic crystal fiber core with SERS-active materials and analyte-binding molecules during the fabrication process, before the fiber is assembled into the final probe. This advance preparation ensures that the sensitive detection surfaces are already optimized and ready for use, improving detection sensitivity while streamlining the overall manufacturing process by eliminating separate functionalization steps.
Solution Approach 2:
The patent replaces complex mechanical assembly processes with chemical and optical integration methods. Instead of mechanically assembling multiple discrete components, the SERS-active materials and functional molecules are chemically integrated into the photonic crystal fiber matrix, creating a monolithic structure that achieves high detection sensitivity through material properties rather than mechanical complexity.
3Measurement precision
If noble metal nanoparticles are immobilized on the fiber core and air holes, then SERS signal enhancement is achieved, but the device complexity increases
Solution Approach 1:
The patent applies merging by combining the SERS-active nanoparticle immobilization function with the photonic crystal fiber fabrication process itself. The metallic nanoparticles are integrated into the glass matrix during drawing, creating a unified structure where signal enhancement and structural integrity are achieved simultaneously. This eliminates the need for separate nanoparticle deposition steps, reducing device complexity while maintaining high Raman signal enhancement.
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 PCF probes demonstrate high sensitivity and specificity in detecting proteins and biomarkers in biological fluids, enabling differentiation between benign and malignant states, and achieving detection at low concentrations with minimal sample volume.
Implementation Method 1
Due to the surface plasmonic effect, the analyte molecules experience significant increase in field intensity; hence, the detectable scattering signal is also increased by several folds
Implementation Method 2
a photonic crystal fiber (PCF) probe for integrated sample collection and SERS sensing
Data Source
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AI summary
The present application discloses a surface-enhanced Raman scattering (SERS)-active photonic crystal fiber (PCF) probe including a biopsy needle in the PCF probe for integrated sample collection and SERS sensing of one or more analytes comprised in the sample. The PCF comprises solid core and a cladding region surrounding the solid core, wherein the cladding region comprises air holes functionalised by metallic nanoparticles. The application also provides a method for detecting one or more analytes using the PCF probe as well as the use of the PCF probe for the detection of one or more analytes.