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6 pags., 4 figs., Here, we present and implement a new approach for producing modular inkjet-printable surface-enhanced Raman scattering (SERS) chemosensors. These sensors, combined with a rapid large field-of-view imaging system allow for fast imaging of the chemical characteristics of a sample. The performance of these materials is illustrated by printing a pH sensor on paper and interrogating aqueous solutions at different pH values. Results show single-shot images exceeding 9 mm2 which are readily read out via SERS imaging., M.L. and N.F.v.H. acknowledge support from the Ministry of Science, Innovation, and Universities (MCIU: RTI2018-099957-J-I00 and PGC2018-096875-B-I00). N.F.v.H. acknowledges the financial support from the European Commission (ERC Advanced Grant 670949-LightNet) and the AGAUR (2017SGR1369). This work was partially funded by CEX2019-000910-S [MCIN/ AEI/10.13039/501100011033], Fundació Privada Cellex, Fundació Privada Mir-Puig, and Generalitat de Catalunya through the CERCA program. V.G. acknowledges Ministry of Science, Innovation, and Universities for financial support (FIS2017-91413-EXP and PGC2018-095777-B-C21). I.C, N.P.P., and R.A.A.P. acknowledge support by the Ministry of Science, Innovation, and Universities (PID2020-120306RB-I00 and PDC2021-121787-I00), the AGAUR (2017SGR883), and the Universitat Rovira i Virgili (2021PFR-URV-B2-02).

16 pags., 7 figs., 1 tab., Goldnanostars are among the most efficient plasmonic nano-materials for optical sensing with surface enhanced Ramans cattering. In recent years,goldnanostars have increased relevance in physics,analytical chemistry, environmental science,biology and medicine,and in particularin sensing and therapy. These colloid scan sustain ultra strong electromagnetic fields which allow their use as single particles optical enhancers;are colloidally stable and may have a marked catalytical activity. Due to their exotic shape,these colloids present characteristic optical and reactive behaviors. Here,we briefly discuss the optical properties, the synthetic routes and the analytical applications of these nanoparticles., This work is supportedby the Ministeriode Ciencia Innovacion/AEI and the European Union Next Generation /PRTR(PID2020-120306RB-I00 and PDC2021-121787-I00),the AGAUR (2017SGR883),the Universitat Rovira i Virgili (2021PFR-URV-B2-02), the Cluster of Excellence’ Advanced Imaging of Matter’of the Deutsche Forschungsgemeinschaft (DFG)– EXC 2056 – project ID390715994and the ENSEMBLE3 project(GA No. MAB/2020/14) Foundation for Polish Science-European Union (GA.No.857543)

Plasmonic reversible gas sensors are of paramount importance for the monitoring of indoor environments. Herein, we design and engineer a plasmonic foam, with a high surface area, confined inside a capillary glass tube for the live monitoring of carbon monoxide (CO) in closed environments using surface-enhanced resonance Raman scattering. The illumination of the sensor with light during the flow of air allows the live monitoring of the concentration of atmospheric CO through surface-enhanced resonance Raman scattering. The sensor was prepared with a detection range from 10 to 40 ppm, due to health needs. The results show a sensitive, selective, reversible and robust sensor applicable to the monitoring of CO levels but also to other gas species upon appropriate functionalization.