{HEAD ~ The method} 1, wherein {TAIL ~ the spaced apart electrodes} comprise interdigitated electrodes formed on a substrate 
{ HEAD ~ The method } 1 , wherein { TAIL ~ the spaced apart electrodes } comprise interdigitated electrodes formed on a substrate
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH