Accurate and highly selective detection of trace gases at part-per-billion (ppb) concentrations is a critical enabling technology for environmental monitoring, industrial process control and emerging healthcare applications. In particular, large-scale in-situ monitoring of climate-relevant gases is increasingly required to understand complex environmental systems and to support evidence-based responses to climate change. At present, however, ppb-level sensitivity and high selectivity are achievable only with bulky and costly laboratory instruments, limiting their deployment in field environments and continuous monitoring networks.
The ERC Starting Grant project sCENT addressed this bottleneck by developing a disruptive chip-scale spectroscopic sensor that combines high-end performance with compactness, robustness and low sample consumption. Using a pioneering waveguide design supporting air-like modes, sCENT demonstrated the first miniaturised sensor capable of ppb-level detection, isotope discrimination and long-term stability on a photonic chip, opening the way to distributed, real-world gas monitoring.
Building on this result, the present project aimed to translate the sCENT concept from proof-of-principle towards real-world applicability. The main objectives were (i) the development of an integrated prototype module and (ii) the preparation of a first field-oriented validation through the study of methane emissions from permafrost-associated bacteria.
In parallel, the project addressed key barriers to exploitation through intellectual property management, early market analysis in environmental intelligence and biotechnology, and the definition of a technology roadmap.
The expected impact is to enable a new generation of compact, highly sensitive and selective gas sensors for large-scale environmental monitoring. By reducing size, cost and operational complexity, the project is expected to unlock new applications in climate research, environmental surveillance and industrial diagnostics and to significantly improve our capacity to observe trace-gas dynamics in natural and engineered systems.
