We describe a fundamental observation in Metal-Enhanced Fluorescence (MEF), which has become a leading technology in the life sciences today, namely, how the lifetime of fluorophores near-to metallic plasmon-supporting silver islands/nanoparticles, modulates as a function of excitation power irradiance. This finding is in stark contrast to that observed in classical far-field fluorescence spectroscopy, where excitation power does not influence fluorophore radiative decay/lifetime.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s10895-012-1132-3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
MicroMetaSense: Coupling Plasmonic Metasurfaces with Fluorescence for Enhanced Detection of Microplastics in Real Samples.
ACS Sens
December 2024
UNAM-National Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey.
Diverse analytical techniques are employed to scrutinize microplastics (MPs)─pervasive at hazardous concentrations across diverse sources ranging from water reservoirs to consumable substances. The limitations inherent in existing methods, such as their diminished detection capacities, render them inadequate for analyzing MPs of diminutive dimensions (microplastics: 1-5 μm; nanoplastics: < 1 μm). Consequently, there is an imperative need to devise methodologies that afford improved sensitivity and lower detection limits for analyzing these pollutants.
View Article and Find Full Text PDFResearch has shown that the expression level of microRNA-155 (miRNA-155) is positively correlated with clinical stage and depth of invasion in patients with cervical cancer and cervical intraepithelial neoplasia and tends to be highly expressed. Therefore, it is very important to develop sensitive miRNA-155 analysis methods for the early diagnosis, treatment, and prognostic evaluation of cervical cancer. In this study, a near-infrared light-driven fluorescent biosensor based on the metal-enhanced fluorescence effect of polydopamine-coated upconversion nanoparticle (UP/Au) and two toehold-mediated strand displacement (TMSD) steps was constructed for the detection of miRNA-155.
View Article and Find Full Text PDFBlue-emitting SiO-coated Si-doped ZnSeS quantum dots conjugated aptamer-molecular beacon as an electrochemical and metal-enhanced fluorescence biosensor for SARS-CoV-2 spike protein.
Anal Chim Acta
November 2023
School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK.
The outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) which was first reported in early January 2020, continues to devastate the worlds public health system. Herein, we report on the development of a novel metal-enhanced fluorescence (MEF) and electrochemical biosensor for SARS-CoV-2 spike (S) protein. To develop the MEF biosensor, SiO-coated Si-doped ZnSeS quantum dots (QDs) were newly synthesized and conjugated to an aptamer-molecular beacon (Apta-MB) probe.
View Article and Find Full Text PDFSimultaneous ionic cobalt sensing and toxic Congo red dye removal: a circular economic approach involving silver-enhanced fluorescence.
Nanoscale Adv
September 2024
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science Shinjuku-ku Tokyo 162-8601 Japan
Article Synopsis
- A fluorescent quinone-capped silver hydrosol (AgOSA) was created using salicylaldehyde and ionic silver, which was then quenched by the toxic Congo red dye (CR), transforming it into CRAgOSA due to strong silver-sulfur interactions.
- The addition of cobalt ions restored fluorescence in the compound (CoCRAgOSA), enhancing it by 8.3 times compared to AgOSA because it freed CR and reduced self-quenching from excess quinone.
- The research developed a sensitive ionic cobalt sensor with high detection capabilities, simultaneously allowing colorimetric sensing of mercury, while also addressing environmental concerns by chemisorbing the toxic CR dye through the nanosensor.
Recent applications of coinage metal nanoparticles passivated with salicylaldehyde and salicylaldehyde-based Schiff bases.
Nanoscale Adv
July 2024
Department of Chemistry, Solar Energy Conversion and Nanomaterials Laboratory, Manipal University Jaipur Dehmi Kalan Jaipur 303007 Rajasthan India
Salicylaldehyde (SD) and its derivatives are effective precursors for generating coinage metal (gold, silver, and copper) nanoparticles (NPs). These NPs have a variety of potential environmental applications, such as in water purification and sensing, and those arising from their antibacterial activity. The use of SD and its derivatives for synthesizing coinage NPs is attractive due to several factors.
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!