Joung et al. Nanoscale Research Letters 2012, 7:93 http://www.nanoscalereslett.com/content/7/1/93 Page 6 of 8 Figure 4 UV-Vis absorption spectra of InP NQDs synthesized using various P precursors. (a) UV-Vis absorption spectra of InP NQDs synthesized using different P precursors at the same temperature (injection at 230°C). (b) Changes in particle sizes indicated from the first excitonic transition in different reaction temperatures.