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 Lowell
UMass Lowell is a comprehensive public research university in the University of Massachusetts system, known for hands-on, industry-aligned education. Industry partners engage through open-access core research facilities and pilot-scale labs for prototyping and scale-up, supported by staff for contract services. A robust co-op program connects companies with student and faculty talent, while incubator and coworking sites near campus offer labs and flexible space. Research is supported by competitive federal funding from agencies such as the National Science Foundation, National Institutes of Health, Department of Energy, and Department of Defense. A dedicated technology transfer office supports IP, licensing, sponsored research, and startup formation to streamline commercialization.
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