(19)

(11)

EP 2 356 668 A2

(12)

(88) Date of publication A3: 26.08.2010 (43) Date of publication: 17.08.2011 Bulletin 2011/33 (21) Application number: 09832362.9 (22) Date of filing: 25.11.2009

(51) International Patent Classification (IPC):  H01J 49/10(2006.01) G01N 27/62(2006.01) H01J 49/04(2006.01) (86) International application number: PCT/US2009/065891 (87) International publication number: WO 2010/068491 (17.06.2010 Gazette 2010/24)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 25.11.2008 US 323276 24.11.2009 US 264119 P (71) Applicant: The George Washington University Washington, DC 20052 (US)	(72) Inventors: VERTES, Akos Reston VA 20190 (US) NEMES, Peter Silver Spring MD 20906 (US) (74) Representative: Barton, Matthew Thomas  Forrester & Boehmert Pettenkoferstrasse 20-22 80336 München 80336 München (DE)