The method 9 wherein said {TAIL ~ optically active metal ion} is incorporated into said {HEAD ~ bead} by coprecipitation during said sol gel process 
The method 9 wherein said { TAIL ~ optically active metal ion } is incorporated into said { HEAD ~ bead } by coprecipitation during said sol gel process
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH