Figure 11: An Optical Probe Coated Iron Oxide Core Is Encapsulated in a Silica Shell With a Targeting Agent on the Surface.

Source: U.S. Department of Health and Human Services, National Institutes of Health, National Cancer Institute. Cancer nanotechnology. Going small for big advances: using nanotechnology to advance cancer diagnosis, prevention and treatment [report on the Internet]. January 2004. U.S. Department of Health and Human Services. [cited 2006 Nov. 2]. Available at: http://nano.cancer.gov/resource_center/cancer_nanotechnology_brochure.pdf.