Carbon dots
Product Description
Alfa Chemistry offers carbon dots, a carbon-based zero-dimensional material, in water-soluble and oil-soluble form, with a wavelength range of 415-570 nm and quantum yields ≥ 40%. Carbon dots have many advantages such as excellent optical properties, good water solubility, environmental friendliness, wide source of raw materials, low cost, and good biocompatibility. Carbon dots have good application prospects in medical imaging technology, environmental monitoring, chemical analysis, catalyst preparation, energy development and many other fields.
Other Information
Storage conditions: stored at room temperature, dry and protected from light, refrigerated in hot weather above 30 degrees. Storage period of 6 months.
If solution is needed, it is recommended to sonicate at 700 W for 10 min and use immediately.
Advantages of Carbon Dots
- Fast photogenerated electron transfer.
- Electron storage performance.
- Good upconversion photoluminescence.
Applications
Bioimaging
Sahu et al. demonstrated easy, green and large scale synthesis of carbon nanoparticles from inexpensive and readily available natural precursors. These partially crystallized carbon nanoparticles show strong and stable photoluminescence, depending on the excitation wavelength and pH value. Carbon dots do not show any cytotoxicity and are efficiently absorbed by cells. Due to the combined advantages of green synthesis, high water stability, good and tunable luminescence and high biocompatibility, these CDs are expected to have potential applications in biomarkers and solution state optoelectronics.
Fig. 1 (a) Cell viability by MTT assay, (b) MG-63 cells under bright field, by excitation at (c) 488 nm and (d) 405 nm. (Sahu et al., 2012)
White Light Emitters
Guo et al. reported the synthesis of multicolor fluorescent CDs from the chemical decompression of epoxy-rich polystyrene (PS) photonic crystals by a simple one-step pyrolysis process. Guo et al. pyrolyzed homogeneous spherical colloidal crystals to obtain CDs with narrow size distribution directly without further processing. Interestingly, by simply varying the pyrolysis temperature from 200, 300 to 400 °C, direct CDs with tunable blue, orange and white emission under single wavelength UV excitation. These prepared CDs show excellent PL properties with QYs up to 47% and high solubility in water and most organic solvents. This work offers several advantages for producing CDs: easy handling, no surface passivation or tedious separation processes, and direct access to efficient CD-based white light emitters.
Fig. 2 (A) Emission spectra of LED lamps. (B) Placement of the CD200 (a), CD300 (b) and CD400 (c) emission spectra on the CIE 1931 chromaticity chart. (C–E) Photographs of the corresponding LEDs with CD200, CD300 and CD400 applied as phosphors, respectively. (Guo et al., 2012)
Alfa Chemistry can provide a variety of complex and customized fluorescent quantum dot products. Our products involve perovskites precursors, perovskites quantum dots, quantum dot kit, single layer quantum dots, upconverting nanoparticles and other fluorescent quantum dots. Alfa Chemistry provides products with high fluorescence quantum yield, stable quality and relatively low price. Our products are constantly updated. If the product you need is not in our catalog, please feel free to contact us, we provide relevant custom services.
References
- Sahu, Swagatika, et al. Simple one-step synthesis of highly luminescent carbon dots from orange juice: application as excellent bio-imaging agents[J]. Chemical communications, 2012, 48(70): 8835-8837.
- Guo, X. , et al. Facile access to versatile fluorescent carbon dots toward light-emitting diodes[J]. Chemical Communications, 2012, 48(21):2692-2694.
* It should be noted that our service is only used for research, not for clinical use.
