AI Article Synopsis
- Noble metal nanoparticles have enhanced light scattering and absorption at certain wavelengths because of localized surface plasmon resonance, making them useful as contrast agents in optical imaging.
- Various optical techniques have been developed to detect these nanoparticles, and this review focuses on optical interferometry methods for measuring their presence and concentration.
- The paper analyzes the strengths and weaknesses of different interferometry approaches, provides quantitative comparisons of signal-to-noise ratios, and outlines the advantages of each method for specific applications.
Article Abstract
Noble metal nanoparticles exhibit enhanced scattering and absorption at specific wavelengths due to a localized surface plamson resonance. This unique property can be exploited to enable the use of plasmonic nanoparticles as contrast agents in optical imaging. A range of optical techniques have been developed to detect nanoparticles in order to implement imaging schemes. Here we review several different approaches for using optical interferometry to detect the presence and concentration of nanoparticles. The strengths and weaknesses of the various approaches are discussed and quantitative comparisons of the achievable signal to noise ratios are presented. The benefits of each approach are outlined as they relate to specific application goals.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3799674 | PMC |
| http://dx.doi.org/10.1364/BOE.4.002166 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Accelerating Plasmonic Hydrogen Sensors for Inert Gas Environments by Transformer-Based Deep Learning.
ACS Sens
January 2025
Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden.
Rapidly detecting hydrogen leaks is critical for the safe large-scale implementation of hydrogen technologies. However, to date, no technically viable sensor solution exists that meets the corresponding response time targets under technically relevant conditions. Here, we demonstrate how a tailored long short-term transformer ensemble model for accelerated sensing (LEMAS) speeds up the response of an optical plasmonic hydrogen sensor by up to a factor of 40 and eliminates its intrinsic pressure dependence in an environment emulating the inert gas encapsulation of large-scale hydrogen installations by accurately predicting its response value to a hydrogen concentration change before it is physically reached by the sensor hardware.
View Article and Find Full Text PDFMycosynthesis of chitosan-selenium nanocomposite and its activity as an insecticide against the cotton leafworm Spodoptera littoralis.
Sci Rep
January 2025
Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, Egypt.
The cotton leafworm, Spodoptra littoralis, causes great damage to cotton crops. A new, safer method than insecticide is necessary for its control. Selenium nanoparticles (SeNPs) are metalloid nanomaterial, with extensive biological activities.
View Article and Find Full Text PDFCyclic Voltarefractometry of Single TiO Nanoparticles in Large Ensembles in Nonaqueous Electrolyte.
Anal Chem
January 2025
Nanobiotechnology Department of the Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, Universitaetsplatz 1, Senftenberg 01968, Brandenburg, Germany.
Single nanoparticle (NP) cyclic voltarefractometry (CVR), realized as wide-field surface plasmon resonance microscopy (SPRM) in combination with potential cycling, has been proposed and applied to the in situ study of TiO NPs. Electrochemical activity of TiO is mainly observed outside the electrochemical stability window of water. Therefore, the response of individual anatase (a-TiO) and rutile (r-TiO) NPs adsorbed on a gold layer was studied in 0.
View Article and Find Full Text PDFOne-step spray pyrolysis synthesis of ZnO/Ag hollow spheres for enhanced visible-light-driven antibacterial applications and wound healing.
Dalton Trans
January 2025
Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, 030032, China.
ZnO/Ag hollow particles were synthesized a one-step spray pyrolysis method for enhanced antibacterial activity and wound healing applications. The hollow structure and uniform distribution of Ag nanoparticles within the ZnO matrix were confirmed by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). UV-Vis spectroscopy and Tauc plot analysis revealed a reduction in the bandgap, attributed to the surface plasmon resonance (SPR) of Ag, improving light absorption in the visible range.
View Article and Find Full Text PDFRecent trends and impact of localized surface plasmon resonance (LSPR) and surface-enhanced Raman spectroscopy (SERS) in modern analysis.
J Pharm Anal
November 2024
Department of Pharmaceutical Analysis, ISF College of Pharmacy Moga, 142001, Punjab, India.
An optical biosensor is a specialized analytical device that utilizes the principles of optics and light in bimolecular processes. Localized surface plasmon resonance (LSPR) is a phenomenon in the realm of nanophotonics that occurs when metallic nanoparticles (NPs) or nanostructures interact with incident light. Conversely, surface-enhanced Raman spectroscopy (SERS) is an influential analytical technique based on Raman scattering, wherein it amplifies the Raman signals of molecules when they are situated near specific and specially designed nanostructures.
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!