Oil to Carbon Quantum Dots
Product Description
Alfa Chemistry can provide customers with oil to carbon quantum dots at 405-565 nm, quantum yield> 50%, organic solvent is toluene. Oil to carbon quantum dots are chemically stable, inert, form stable colloidal solutions, and are highly resistant to photobleaching.
Applications
Ion Sensors
Baogang et al. prepared highly charged CQDs by one-pot pyrolysis using citric acid as the carbon source and imidazole-based ionic liquids at room temperature as the capping agent. The prepared CQDs exhibited quantum yields as high as 25.1% and were stable under various environments. In addition, the amphiphilicity of CQDs can be easily tuned by anion exchange, which leads to spontaneous phase transfer between the aqueous and oil phases. CQDs have proven to be promising for applications as ion sensors and fluorescent inks. In both cases, these ionic liquid-modified CQDs were found to have new properties and/or superior functionality over existing ones.
Fig.1 Photos of different letters under room light and UV irradiation directly written on various surfaces by a brush pen using CQDs2-NTf2 in ethyl acetate (0.5 mg/mL) as ink. (Baogang et al., 2015)
Lubricity Additives
Shang et al. prepared hydrophobic N-CQDs that exhibited good dispersion stability in nonpolar solvents; therefore, N-CQDs were used directly as friction-reducing and anti-wear additives in PAO base oils. Tribological evaluation showed that the friction reduction and anti-wear performance of the non-polar PAO base oil could be maximized by 47.1% and 90.5% when N-CQDs were added at a concentration of about 1.0 wt%, indicating that N-CQDs as an additive could greatly improve the lubrication performance of PAO base oil in the boundary lubrication region. At the same time, they found that a tribochemical reaction occurred between N-CQDs and metal friction surfaces by comprehensively analyzing the corresponding abrasion surfaces. The formation of boundary-lubricated films effectively prevents direct contact between the friction surfaces, which plays a major role in reducing friction and wear. In addition, N-CQDs can adsorb unevenly on the metal friction surface during the friction process and inhibit the contact area from being oxidized.
Fig. 2 (a) Proposed structural evolutions of TDCA with different pyrolysis duration, (b) Photoluminescence intensity of TDCA with different pyrolysis duration and (c) Digital images of dispersion of TDCA-1h nanocomposites in PEG base oil. (Shang et al., 2017)
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
- Baogang, et al. Tunable Amphiphilicity and Multifunctional Applications of Ionic-Liquid-Modified Carbon Quantum Dots[J]. ACS Applied Materials & Interfaces, 2015, 7(12):6919-6925.
- Shang, W. , et al. Facile one pot pyrolysis synthesis of carbon quantum dots and graphene oxide nanomaterials: All carbon hybrids as eco-environmental lubricants for low friction and remarkable wear-resistance[J]. Tribology International, 2017:S0301679X17304449.
* It should be noted that our service is only used for research, not for clinical use.
