RT Journal Article T1 Near-infrared lifetime nanothermometry detects microwave-induced brain heating A1 Liyan Ming, A1 José Lifante, A1 Ginés Lifante Pedrola, A1 Daniel Ortega, A1 Erving Ximendes, A1 Riccardo Marin, A1 Julio Ramiro Bargueño, A1 Daniel Jaque, A1 Rubio Retama, Benito Jorge A1 Zabala Gutiérrez, Irene AB In modern environments, the brain is continuously exposed to numerous external stimuli, including the microwave radiation used in telecommunication technologies. It has been suggested that the absorption of this radiation by brain tissue can induce local heating. Because brain temperature influences neural activity, metabolism, and overall brain function, microwave-induced heating raises concerns over the safety of such technologies. Proper evaluation of the risks associated with microwave-based technologies thus requires accurate quantification of heating in deep organs without disrupting their physiology. This study, demonstrates that microwave-induced brain heating can be remotely monitored in vivo via luminescence thermometry using near-infrared luminescent silver sulfide (Ag2 S) nanoparticles. Their temperature-dependent luminescence lifetime is a reliable thermometric parameter for the measurement of absolute brain temperature. The in vivo results offer direct, real-time evidence of brain heating (up to 4 °C) under telecom exposure conditions (3 GHz). Moreover, they establish lifetime thermometry as a reliable, minimally invasive approach for investigating thermoregulation in deep tissues even under external electromagnetic stimulation PB Wiley YR 0025 FD 0025-11-06 LK https://hdl.handle.net/20.500.14352/131036 UL https://hdl.handle.net/20.500.14352/131036 LA eng NO Ming L, Lifante J, Pedrola GL, et al. Near‐Infrared Lifetime Nanothermometry Detects Microwave‐Induced Brain Heating. Advanced Optical Materials 2025;13:e02319. https://doi.org/10.1002/adom.202502319 NO Ministerio de Ciencia, Innovación y Universidades NO Comunidad de Madrid DS Docta Complutense RD 17 mar 2026