Oil Soluble Carbon dots
Product Description
Alfa Chemistry can provide customers with oil soluble carbon dots at 410-570 nm, quantum yield≧ 40%. Our oil soluble carbon dots are widely used in sensing, environmental monitoring, chemical analysis, catalyst preparation and energy development, etc.
Applications
White Light Emitting Diodes
Carbon dots (CDs) have attracted a lot of attention in light emitting diode (LED) applications due to their environmental friendliness, ease of processing and unique optical properties. For practical application of CDs in LEDs, there is still an urgent need for controlled synthesis of high-performance oil-soluble carbon dots. Wang et al. prepared S,N-doped oil-soluble carbon dots (S, N-OCDs) with an average size of 3.38 nm by solvothermal reaction of acetone, dimethyl trithiocarbonate (DMTTC) and nitric acid. The characterization results showed that the conjugated aromatic π-system from aldol condensation and the highly reactive radical from DMTTC essentially dominated the development of these yellow-green luminescent S, N-OCDs with high carbonization, quantum yield (21.08%) and oil solubility. In addition, a white light emitting diode (WLED) was fabricated by mixing the obtained S, N-OCDs with epoxy resin and dropping the mixture onto the surface of a gallium nitride (GaN)-based blue chip. The prepared WLED showed good color rendering (CCT of 5389 K, CIE coordinates of (0.33, 0.30), and CRI of 88.38).
Fig. 1 Photoluminescence characterization of the S,N-OCDs: photographs of the S,N-OCD solution under daylight (left) and 460 nm excitation light (right). (Wang et al., 2020)
Fluorescent Nano Additives
A powerful and cost-effective strategy for the large-scale synthesis of oil-soluble carbon dots (C-dots) has been developed by microwave-assisted selective carbonization of surfactants. In this strategy, the surfactant as a carbon source is converted into C-dots consisting of cross-linked core and peripheral fatty chains after carbonization of hydrophilic molecules. The overhanging fatty chains not only provide good oil solubility for the C-dots, but also ensure a homogeneous nanoscale structure due to their higher steric hindrance at the surface, which limits the growth of the core during the carbonization process. As an example, four inexpensive industrial surfactants were chosen by Fang et al. to synthesize kilogram-scale C-dots, which showed no limitations in further expansion. The resulting C-dots show significant fluorescence and are used as nanoadditives for polymer synthesis and processing for the preparation of fluorescent polymer materials, reduction of polymer melt viscosity and mechanical reinforcement. The ideal industrializable synthesis and the ideal combination with polymer synthesis and processing suggest that C-dots are ready to move from the laboratory to industry.
Fig. 2 (A) CDSP-18 min served as nano-additive for PP melt viscosity reduction and mechanical reinforcement; (B) a proposed mechanism for the mechanical reinforcement and polymer melt viscosity reduction by the C-dots. (Fang et al., 2020)
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
- Wang, Quan, et al. S, N-Codoped oil-soluble fluorescent carbon dots for a high color-rendering WLED[J]. Journal of Materials Chemistry C, 2020, 8(13): 4343-4349.
- Fang, Laiping, et al. Industrializable synthesis of narrow-dispersed carbon dots achieved by microwave-assisted selective carbonization of surfactants and their applications as fluorescent nano-additives[J]. Journal of Materials Chemistry A, 2020, 8(40): 21317-21326.
* It should be noted that our service is only used for research, not for clinical use.
