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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Xue, Bing Cao, Jie Li, Hui Deng, Dawei Gu, Yueqing |
| Description | Author Affiliation: Cao J ( Department of Biomedical Engineering, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, People's Republic of China.) |
| Abstract | In this paper, we report a new facile method to synthesize water-soluble Zn(1-x)Cd(x)Se and core/shell Zn(1-x)Cd(x)Se/ZnS quantum dots (QDs) emitting in the violet-green spectral range, using N-acetyl-L-cysteine (NAC) as a stabilizer. The influence of various experimental variables, including the precursor Zn/Cd/Se/NAC molar ratios, the pH of original solution and the refluxing time on optical properties were explored systematically. The obtained aqueous Zn(1-x)Cd(x)Se QDs exhibit a tunable photoluminescence (PL) emission (from approximately 415 nm to 506 nm) and a favorable narrow PL bandwidth (FWHM: 27-38 nm). After coating with a ZnS shell, the PL emission intensity of the formed core/shell Zn(1-x)Cd(x)Se/ZnS QDs is greatly increased (PL quantum yield (QY): approximately 30%). These resulting Zn(1-x)Cd(x)Se and core/shell Zn(1-x)Cd(x)Se/ZnS QDs were further characterized by transmission electron microscopy (TEM), energy disperse spectroscopy (EDS) and X-ray diffraction (XRD). In addition, the cytotoxicity and the fluorescence imaging of Zn(1-x)Cd(x)Se/ZnS QDs to MCF-7 cells were preliminarily investigated. The experimental results show that the as-prepared violet-green-emitting Zn(1-x)Cd(x)Se/ZnS QDs have low cytotoxicity, which makes them an ideal inorganic fluorescent probe for biolabeling and cell imaging. |
| ISSN | 00219797 |
| Issue Number | 2 |
| Volume Number | 348 |
| e-ISSN | 10957103 |
| Journal | Journal of Colloid and Interface Science |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-08-15 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Acetylcysteine Analogs & Derivatives Quantum Dots Sulfides Chemical Synthesis Zinc Compounds Chemistry Pharmacology Cadmium Compounds Cell Line, Tumor Cell Survival Drug Effects Humans Hydrogen-ion Concentration Microscopy, Electron, Transmission Selenium Compounds Spectrometry, Fluorescence Journal Article Research Support, Non-u.s. Gov't Discipline Colloid & Interface Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Colloid and Surface Chemistry Biomaterials Electronic, Optical and Magnetic Materials |
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