ARTICLEstructures. The fluorescence enhancement and featured strong SHG signal raise potential applications for graphite-shelled Si QDs as cell biolabeling agents and contrast agents in deep tissue microscopy and noninvasive optical tomography.' ASSOCIATED CONTENT b S Supporting Information. Table S1 (correction of CIE chromaticity coordinates x and y with varying ratios of Si@C QDs and Rhodamine 610) and Figures S1ÀS4 (TEM images and size histograms, XRD measurements and Raman spectra, and EDS analysis). This material is available free of charge via the Internet at http://pubs.acs.org.
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