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New biosensor detects urea via visible color changes.
Utilizes gold nanobipyramids (AuNBPs) to sense urea.
Can detect urea at low concentrations (0.098 μM).
Accurate results compared to commercial tests, even in diluted urine.
Specific and reliable even in complex biological fluids.
Applicable for point-of-care diagnostics.
Further testing needed for wider applications.
