This work reports plasmon enhanced photoacoustic generation by using a three dimensional plasmonic absorber. The 3D plasmonic absorber comprises a thin polymer film on glass nanopillar arrays with nanogap-rich silver nanoislands. The 3D plasmonic absorber clearly shows 24.6 times higher enhancement of photoacoustic signals at an excitation wavelength of 630 nm than a simple polymeric absorber. The photoacoustic enhancement results from the volumetric electromagnetic field enhancement on a light-absorbing polymer through 3D plasmonic nanostructures. This novel photoacoustic absorber provides a new direction for highly efficient ultrasonic generation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c5nr05505a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
High sensitivity tapered fiber refractive index biosensor using hollow gold nanoparticles.
Sci Rep
January 2025
Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran.
A localized surface plasmon resonance (LSPR) sensor based on tapered optical fiber (TOF) using hollow gold nanoparticles (HAuNPs) for measuring the refractive index (RI) is presented. This optical fiber sensor is a good candidate for a label-free RI biosensor. In practical biosensors, bioreceptors are immobilized on nanoparticles (NPs) that only absorb specific biomolecules.
View Article and Find Full Text PDFEnhancing photovoltaic efficiency in Half-Tandem MAPbI/ MASnI Perovskite solar cells with triple core-shell plasmonic nanoparticles.
Sci Rep
January 2025
Department of Electrical and Computer Engineering, Aarhus University, Aarhus, 8200, Denmark.
Significant progress has been made through the optimization of modelling and device architecture solar cells has proven to be a valuable and highly effective approach for gaining a deeper understanding of the underlying physical processes in solar cells. Consequently, this research has conducted a two-dimensional (2D) perovskite solar cells (PSCs) simulation to develop an accurate model. The approach utilized in this study is based on the finite element method (FEM).
View Article and Find Full Text PDFGold nanocages co-assembled with Spinacia oleracea extract combined photothermal/photodynamic therapy in 4T1 breast cancer cell line.
Biomed Mater
January 2025
Department of Biomedical Engineering, Indian Institute of Technology, Indian Institute of Technology Hyderabad, HYderabad, Telangana, 502284, INDIA.
Photothermal therapy (PTT) and photodynamic therapy (PDT) have been emerging as potential alternatives to conventional cancer treatment modalities. Gold nanoparticles, owing to their surface plasmon resonance properties, have been promising in cancer phototherapies, and extracts from potentially medicinal plants are commonly employed for the green synthesis of various nanoparticles. Some researchers also have been using chlorophyll as the photosensitizer for reactive oxygen species (ROS) generation.
View Article and Find Full Text PDFMachine learning assisted plasmonic metascreen for enhanced broadband absorption in ultra-thin silicon films.
Light Sci Appl
January 2025
Division of Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
We propose and demonstrate a data-driven plasmonic metascreen that efficiently absorbs incident light over a wide spectral range in an ultra-thin silicon film. By embedding a double-nanoring silver array within a 20 nm ultrathin amorphous silicon (a-Si) layer, we achieve a significant enhancement of light absorption. This enhancement arises from the interaction between the resonant cavity modes and localized plasmonic modes, requiring precise tuning of plasmon resonances to match the absorption region of the silicon active layer.
View Article and Find Full Text PDFTunable MEMS-based meta-absorbers for nondispersive infrared gas sensing applications.
Microsyst Nanoeng
January 2025
Sichuan University, 610207, Chengdu, China.
In conventional nondispersive infrared (NDIR) gas sensors, a wide-spectrum IR source or detector must be combined with a narrowband filter to eliminate the interference of nontarget gases. Therefore, the multiplexed NDIR gas sensor requires multiple pairs of narrowband filters, which is not conducive to miniaturization and integration. Although plasmonic metamaterials or multilayer thin-film structures are widely applied in spectral absorption filters, realizing high-performance, large-area, multiband, and compact filters is rather challenging.
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!