Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 116, Issue 7, Pages 4517-4525Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp212092h
Keywords
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Funding
- National Natural Science Foundation of China [20805022, 21121091]
- China Postdoctoral Science Foundation [20100471294]
- Doctoral Foundation from Ministry of Education [20100091110023]
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Hollow doughnut-like ZnO/Au nanocomposites have been synthesized through a fast one-step microwave-assisted hydrothermal route. The formation mechanism of the product is closely connected with the coordination and selective adsorption effect of trisodium citrate (TSC). Other different structures, such as ZnO nanorods/Au nanopartides, ZnO nanodisks/Au nanoparticles, and ZnO nanospheres/Au nanoparticles have also been obtained in control experiments. The UV-vis and photoluminescence properties of the as-prepared hollow structures with different Au concentrations showed tunable UV and visible emission intensity. The hollow ZnO/Au nanocomposites are photostable with a strong resonance Raman signal. The colorimetric 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assays showed that ZnO/Au nanomaterials have low biological cytotoxicity on human colon cancer cells (LOVO cells) at the concentration of 50 mu g/mL. The as-prepared ZnO/Au nanocomposites with good biocompatibility may have potential applications in biomedicine and biosensors.
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