Flame nanoparticle sensors (IMAGE) Karolinska Institutet Caption Flame nanoparticle deposition was used to produce robust nano-sensors that can detect pesticide residues on apple surfaces within minutes. Credit Artwork by Haipeng Li and Georgios A Sotiriou. Usage Restrictions This image should only be used when reporting about the study “SERS Hotspot Engineering by Aerosol Self-Assembly of Plasmonic Ag Nanoaggregates with Tunable Interparticle Distance” in Advanced Science. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.