Publications by authors named "Rakefet Samueli"
Article Synopsis
- Organophosphates (OP) are harmful chemicals used in agriculture and warfare, creating a need for effective detection methods that work quickly and are cost-effective, especially for detecting contamination in liquid samples.
- Current detection methods are only useful in the short term and fail to address long-term contamination risks, highlighting the need for real-time monitoring of OPs in water and soil.
- This study introduces a transistor-based sensor called MNChem, capable of ultra-sensitive, quantitative detection of diethyl cyanophosphonate (DCNP) in small liquid samples, achieving a detection limit of 100 fg/mL and a wide dynamic range, suggesting it’s suitable for on-site environmental analysis.*
We experimentally studied the second-harmonic generation from 5 and 25 nm-sized gold nanoparticles positioned 5-75 nm away from a thick silver layer. While known theories fail, a proposed model that takes into account the quasi-static interaction of the particles with the underlying silver layer shows good agreement with measured data. This agreement points to the possibility of nonlinear optics based on the interaction between extreme nanoscaled particles, rather than emanating from the particles themselves.
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