Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 × 10. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7914613 | PMC |
| http://dx.doi.org/10.3390/s21041164 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Robust NSCLC Biomarker- Mir-7-5p: Its In-Silico Validation and Potential SPR-Based Probe for Detection.
Microrna
January 2025
School of Biosciences, Apeejay Stya University Gurugram, Sohna-Palwal Road, Haryana-122103, India.
MicroRNA abundance as a particular biomarker for precisely identifying cancer metastases has emerged in recent years. The expression levels of miRNA are analyzed to get insights into cancer tissue detection and subtypes. Similar to other cancer types, the miRNA shows high levels of target mRNA dysregulation in association with non-small cell lung carcinoma (NSCLC).
View Article and Find Full Text PDFFiber Vector Light-Field-Based Tip-Enhanced Raman Spectroscopy.
Nano Lett
January 2025
Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China.
Tip-enhanced Raman spectroscopy (TERS) has been extensively employed to investigate the light-matter interaction at the nanoscale. However, the current TERS strategies lack the ability to excite the low-background inhomogeneous electromagnetic field with significant enhancement of electric field, electric field gradient, and optomagnetic field, simultaneously. To overcome this, we developed a fiber vector light-field-based TERS strategy aimed at exploring the multipole Raman scattering processes of molecules.
View Article and Find Full Text PDFDevelopment of an advanced multimode refractive index plasmonic optical sensor utilizing split ring resonators for brain cancer cell detection.
Sci Rep
January 2025
Department of Chemical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.
In this paper, we propose and theoretically investigate a novel multimode refractive index (MMRI) plasmonic optical sensor for detecting various brain cancer cells, leveraging the unique capabilities of split ring resonators (SRRs). The sensor, simulated using the finite-difference time-domain (FDTD) method, exhibits dual resonance modes in its reflection spectrum within the 1500 nm to 3500 nm wavelength range, marking a significant advancement in multimode plasmonic biosensing. Through detailed parametric analysis, we optimize critical dimensional parameters to achieve superior performance.
View Article and Find Full Text PDFPlasmon-Enhanced Fluorescence Based on Gold Nanobipyramids with PEG-Controlled Distance for Near-Infrared and Visual Analysis of Amyloid-β Aggregation.
ACS Appl Mater Interfaces
January 2025
College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China.
Article Synopsis
- The aging population is leading to a significant rise in Alzheimer's disease cases, making early detection crucial.
- Researchers developed a plasmon-enhanced fluorescence (PEF) sensor using gold nanobipyramids (Au NBPs) to visually detect amyloid-beta protein aggregation, a key marker for Alzheimer's.
- The sensor utilizes a near-infrared fluorescent substance for a highly sensitive detection method, which allows real-time monitoring of Aβ aggregation in human neuroblastoma cells, showing potential as an effective diagnostic tool for Alzheimer's disease.
Light-Driven Nanonetwork Assembly of Gold Nanoparticles via 3D Printing for Optical Sensors.
ACS Appl Nano Mater
December 2024
Assistant Professor of Material Science and Engineering, School for Engineering of Matter, Transport and Energy (SEMTE), Ira A. Fulton Schools of Engineering, Arizona State University (ASU), Tempe, Arizona 85287, United States.
Additive manufacturing known as 3D printing has transformed the material landscape, with intricate structures and rapid prototyping for modern production. While nanoscale 3D printing has made significant progress, a critical challenge remains in the rapid, high-throughput tailoring of complex nanostructures. Here, we present a 3D printing-facilitated, light-driven assembly technology for rapid surface patterning consisting of complex particle nanonetworks with balanced fabrication resolution and processing scalability.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!