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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
Plasmonic Ag Nanocrystal-Patterned Metasurface with Synergistic Order/Disorder Structure for ECL Detection of
Jingjing Liu1, Peilin Wang1, Wenyan Li1
1Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
Analytical Chemistry
|June 18, 2026
Summary
A new biosensor using silver nanocrystal-patterned metasurfaces and electrochemiluminescence detects miRNA-92a-3p in extracellular vesicles. This highly sensitive sensor shows promise for early gastric cancer diagnosis.
Area of Science:
- Nanomaterials Science
- Biosensing Technology
- Analytical Chemistry
Background:
- Extracellular vesicles (EVs) are crucial biomarkers for disease diagnosis.
- MicroRNA-92a-3p (miRNA-92a-3p) is implicated in gastric cancer progression.
- Existing detection methods for miRNAs in EVs often lack sensitivity and specificity.
Purpose of the Study:
- To develop a novel silver nanocrystal-patterned (Ag-NCP) metasurface-based electrochemiluminescence (ECL) sensor.
- To detect miRNA-92a-3p in extracellular vesicles (EVs) with high sensitivity.
- To evaluate the potential of this biosensor for auxiliary diagnosis of gastric cancer.
Main Methods:
- Fabrication of an Ag-NCP metasurface using soft-template and spatial confinement effects.
- Integration of a luminescent 2,2'-bipyridine-5,5'-diamine (Bpy)-covalent organic framework (COF) for ECL.
- Characterization of metasurface properties, including long-range order and short-range disorder.
- Optimization of ECL signal generation through localized surface plasmon resonance and Purcell effect.
- Application of the sensor for miRNA-92a-3p detection in biological samples.
Main Results:
- The Ag-NCP metasurface exhibited synergistic long-range order and short-range disorder, creating high-density electromagnetic hotspots.
- Enhanced local electromagnetic fields and the Purcell effect significantly improved ECL efficiency.
- The sensor achieved a wide linear detection range (1 fM to 10 nM) for miRNA-92a-3p.
- A low limit of detection (0.36 fM) was obtained, demonstrating high sensitivity.
- Successful detection of miRNA-92a-3p in ascites from gastric cancer patients.
Conclusions:
- The developed Ag-NCP metasurface-based ECL sensor offers a highly sensitive and stable platform for miRNA detection.
- The unique structural properties of the metasurface are key to enhancing ECL performance.
- This biosensor holds significant potential as an auxiliary diagnostic tool for gastric cancer.
