Simple low-cost optical method for acrylamide detection in water using silver nanoparticles and thiol chemistry
A novel, simple, and low-cost detection method for acrylamide in water based on silver nanoparticle aggregation modulated by mercaptan (EDT) interaction. The method enables visual or spectroscopic detection, with potential integration into portable Raman spectroscopy or SERS fiber platforms for field-deployable monitoring.
Overview
This technology offers a simple and low-cost optical method for detecting acrylamide in water. Acrylamide is a known contaminant of concern in drinking water and food products, and current detection methods often require expensive instrumentation and complex sample preparation. The approach leverages the interaction between acrylamide and a mercaptan molecule (EDT, a di-thiol compound) to modulate the aggregation state of silver nanoparticles, producing a visible or quantifiable optical signal. This makes acrylamide detection accessible without sophisticated laboratory infrastructure.
Technical specifications
- Core mechanism: EDT cross-links silver nanoparticles, causing aggregation. Acrylamide reacts with EDT via thiol-ene addition, preventing cross-linking and reducing aggregation, which changes the optical properties of the nanoparticle suspension.
- Detection modes: Visual color change or quantitative measurement using a standard UV-Vis spectrophotometer.
- Sensitivity target: 0.5 ppb acrylamide in water, achievable through method optimization (nanoparticle size and concentration, EDT concentration, reaction time and temperature), sample concentration via evaporation, or integration with advanced readouts.
- Enhanced readout options: Compatible with surface-enhanced Raman spectroscopy (SERS), since silver nanoparticles serve as SERS substrates. Can be paired with portable Raman spectrometers or a SERS fiber platform for volatile mercaptan capture and field-deployable detection.
- Previously validated: Demonstrated in food matrices in a peer-reviewed publication (Food Chemistry, 2021).
Technology readiness level
The method has already been published and validated in food matrices, establishing proof of concept. Future work focuses on extending detection to lower concentrations (down to 0.5 ppb) in water through parameter optimization, sample concentration strategies, and integration with SERS-based readout platforms. The technology is at an early-to-mid stage of development, ready for optimization and pilot validation in water monitoring applications.
About University of Massachusetts, Amherst
UMass Amherst is a comprehensive public research university and the flagship campus of the University of Massachusetts system, with a large student body and a robust research enterprise. Industry engagement centers on company access to an integrated network of shared core facilities and co-located labs, with options for on‑site residency in an adjacent research and technology park. A dedicated industry partnerships team streamlines sponsored research, material transfer, and confidentiality agreements and connects partners to faculty expertise, prototyping, and pilot‑scale testing. Research is supported by competitive federal funding from agencies such as the National Science Foundation, National Institutes of Health, the U.S. Department of Energy, the Department of Defense, and the U.S. Department of Agriculture. A technology transfer office advises on IP strategy, manages licensing, and supports new venture formation.
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