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SWNHs were successfully labeled with a high density of QDs. a TEM micrograph of SWNH–QD conjugates shows highcontrast spherical CdSe/ZnS QDs are attached to the exohedral surface of the lower contrast SWNHs. b Higher resolution image of outlined area (red) depicted in a. c EDS spectra of a zone represented by the red circle in b. (Color figure online)
