In the past two decades, photoluminescent semiconductor quantum dots（QDs） have received intensive attention for a variety of promising properties and applications, especially for their potential application in cellu...In the past two decades, photoluminescent semiconductor quantum dots（QDs） have received intensive attention for a variety of promising properties and applications, especially for their potential application in cellular imagingE. QDs with high quantum yield have been prepared based on cad mium（zinc） selenide（sulfide） and related coreshell compo sites. However, the release of Cd2＋, S2 and Se2 ions in evitably causes serious health and environmental concerns. Therefore, many efforts have been devoted to developing be nign alternatives with enhanced photoluminescence, such as silicon nanoparticles and nanowires. Carbonbased nanomaterials, including carbon nano tubes（CNTs） and carbogenic nanoparticles（CNPs）, represent an exciting new type of alternative to the aforementioned QDs with high quantum yield. CNPs are superior to QDs in chemi cally inertness, biocompatibility and photostability. After the report on the photoluminescence of carbon dots prepared by laser ablation with graphite as carbon sourcetill, several strate gies have been developed for the preparation of luminescent CNPs. For instance, luminescent CNPs were prepared by Liu et al.021 with candle soot via oxidative acid treatment, and the resulting CNPs with different emission colors were isolated by means of electrophoretic separation. Hu et al. employed an improved onestep approach for the synthesis of luminescent CNPs by laser irradiating a suspension of carbon materials in organic solvents of diamineterminated oligomeric poly（ethylene glycol）（PEG1500N）. More recently, luminescent carbogenic dots have been obtained by Peng and Travas via surface passivation of carbogenic dots in an aqueous solution with carbohydrates as the starting materials. Carbogenic nano particlesloaded magnesiumaluminophosphate solid phosphors.展开更多
基金Supported by the National Natural Science Foundation of China（Nos.21071060, 20731003） and the National Basic Research Program of China（No.2007CB613303）.
文摘In the past two decades, photoluminescent semiconductor quantum dots（QDs） have received intensive attention for a variety of promising properties and applications, especially for their potential application in cellular imagingE. QDs with high quantum yield have been prepared based on cad mium（zinc） selenide（sulfide） and related coreshell compo sites. However, the release of Cd2＋, S2 and Se2 ions in evitably causes serious health and environmental concerns. Therefore, many efforts have been devoted to developing be nign alternatives with enhanced photoluminescence, such as silicon nanoparticles and nanowires. Carbonbased nanomaterials, including carbon nano tubes（CNTs） and carbogenic nanoparticles（CNPs）, represent an exciting new type of alternative to the aforementioned QDs with high quantum yield. CNPs are superior to QDs in chemi cally inertness, biocompatibility and photostability. After the report on the photoluminescence of carbon dots prepared by laser ablation with graphite as carbon sourcetill, several strate gies have been developed for the preparation of luminescent CNPs. For instance, luminescent CNPs were prepared by Liu et al.021 with candle soot via oxidative acid treatment, and the resulting CNPs with different emission colors were isolated by means of electrophoretic separation. Hu et al. employed an improved onestep approach for the synthesis of luminescent CNPs by laser irradiating a suspension of carbon materials in organic solvents of diamineterminated oligomeric poly（ethylene glycol）（PEG1500N）. More recently, luminescent carbogenic dots have been obtained by Peng and Travas via surface passivation of carbogenic dots in an aqueous solution with carbohydrates as the starting materials. Carbogenic nano particlesloaded magnesiumaluminophosphate solid phosphors.
