A multifunctional nanocomposite for luminescence resonance energy transfer-guided synergistic monitoring and therapy under single near infrared light.

By utilizing a drug coordinated to Eu(3+) as a blocker of luminescence resonance energy transfer from the Eu(3+) complex to gold nanotriangles, we successfully implemented multiple functions into one nanocomposite; it operates under single near infrared light and is efficient for the temperature/luminescence monitoring of drug release and synergistic turning-on of photothermal chemotherapy.