Figure 5 ITO nanocrystals from the

hot-injection approach. (a and b) UV-vis-NIR spectra of ITO nanocrystals starting with different molar ratios of tin precursors. (c, d, and e) Typical TEM images of ITO nanocrystals starting with 3, 5, and 30 mol.% of tin precursors, respectively. (f) The corresponding size distribution of ITO nanocrystals. We further propose effective size tuning of monodisperse ITO nanocrystals via multiple injections of reagents into the reaction mixtures. For example, GDC-0994 research buy the diameters of the ITO nanocrystals starting with 10 mol.% of tin precursor were increased from 11.4 ± 1.1 to 20.1 ± 1.5 nm (Figure 6a,b) using the multiple injection approach. The NIR SPR features of the ITO nanocrystals with large diameters were preserved after the multiple injection procedure, as shown in Figure 6c. Figure 6 ITO nanocrystals obtained by multiple injections of reagents. (a and b) A typical TEM image and the corresponding histogram of size

distribution. (c) UV-vis-NIR spectrum. Conclusions In conclusion, we provide a detailed study on the synthesis and characterization of monodisperse colloidal BX-795 cost ITO nanocrystals. The molecular mechanism associated with the formation of the ITO nanocrystals was identified as amide elimination through aminolysis of metal carboxylate salts. We found that the reaction pathways of the indium precursor, which were critical in terms of controlling the chemical kinetics, in the Masayuki method were more complicated than simple ligand selleck products replacement proposed in the literature. We PF299 in vivo designed a hot-injection approach which separated the ligand replacements of the indium acetate and the aminolysis reactions of the metal

precursors. The hot-injection approach was readily applied to the synthesis of ITO nanocrystals with a broad range of tin dopants, leading to products with decent size distributions. Further multiple injections of reagents allowed effective size tuning of the colloidal ITO nanocrystals. We revealed the effective doping of different concentrations of Sn4+ ions into the corundum-type lattices of the nanocrystals, resulting in characteristic and tunable near-infrared SPR peaks. Our study demonstrates that FTIR is a powerful technique for the investigation of the molecular mechanism and precursor conversion pathways associated with the reactions to generate oxide nanocrystals, which may shed light on future rational design of synthetic strategies of oxide nanocrystals. Authors’ information YZJ is an associate professor at the Materials Science and Engineering Department of Zhejiang University. ZZY is a full professor at the Materials Science and Engineering Department of Zhejiang University. QY and YPR are master students under the supervision of Dr. Jin. XW is a Ph.D. student co-supervised by Dr. Jin and Prof. Ye.