{HEAD ~ The energy difference} between {TAIL ~ the maximum} of the gain and the emission maximum decreases with decreasing size of the nanocrystal 
between
{ HEAD ~ The energy difference } between { TAIL ~ the maximum } of the gain and the emission maximum decreases with decreasing size of the nanocrystal
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH