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News14 July 2026

Laser-induced graphene sensor enables dopamine detection in tears

Researchers from Brazil's Federal University of Pelotas and Federal University of Rio Grande do Sul have developed a laser-induced graphene sensor capable of detecting dopamine in tear fluid with high sensitivity. This advancement could lead to noninvasive monitoring of neurological disorders, utilizing the electroactive properties of graphene to provide a compact and scalable alternative to traditional methods that often require blood or implanted devices.