Development of Near Infrared-Fluorescent Nanophosphors and Applications for Cancer Diagnosis and Therapy

Figure 4

Loss spectrum of a sliced sample of swine colon (solid line). The absorption peak at 1420 nm corresponds to the second harmonic of the infrared absorption of water and depends on the water content. The water absorption spectrum is inserted with a dashed line. The emission spectrum of Y₂O₃:YbEr-NP is also incorporated with a chain line.