MBE apparatus and methods are employed for disclosure purposes only because that is {HEAD ~ the equipment} employed by the inventors herein in their experiments that lead to {TAIL ~ the present invention} 
MBE apparatus and methods are employed for disclosure purposes only because that is { HEAD ~ the equipment } employed by the inventors herein in their experiments that lead to { TAIL ~ the present invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL