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LSCM images of Si/SF nanospheres and Si/SS nanofibers in HeLa cells at 37 °C under an atmosphere of 5% CO2. HeLa cells were cocultured with Si/SF (A, B) and Si/SS (C, D) for 2 or 12 h, respectively. Si/SF nanospheres were labeled with FITC that was excited by 495 nm laser to emit green fluorescence, while Si/SS nanofibers were labeled with RITC that was excited by 565 nm laser to emit red fluorescence.
