Nanomaterials based biosensors for food analysis applications

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1、TrendsinFoodScience&Technology22(2011)625e639ReviewNanomaterialsbasedbiosensorsforfoodDespitetherecentadvancesinfoodpathogendetection(Gong-Jun,Jin-Lin,Wen-Jing,Ming,&Xin-An,2009;Dungchaia,Siangprohb,Chaicumpac,Tongtawed,&Chai-analysisapplicationslapakula,2008),therestillexistmanychallengesandop

2、-portunitiestoimprovethecurrenttechnologyinordertohavesimple,rapid,versatile,andinexpensivetoolsforde-a,bBrizaPerez-Lopezandtectionoffoodcontaminants.a,c,*ThesensingcapacityofthedetectionsystemsisbeingArbenMerkoc¸iimprovedlastlybyusingnanomaterialssuchasmagneticananoparticles(MNPs),carbonnano

3、tubes(CNTs),nanorodsNanobioelectronics&BiosensorsGroup,Catalan(NRs),quantumdots(QDs),nanowires(NWs),nanochan-InstituteofNanotechnology,CIN2(ICN-CSIC),nels(NCs),etc.Thesenanomaterials,usedinelectricalbio-UniversitatAutonomadeBarcelona,08193Bellaterra,sensors,haveaveryhighcapacityforchargetransf

4、er,Catalonia,SpainbwhichmakesthemsuitabletoreachlowerdetectionlimitsLEITATTechnologicalCenter,08221Terrasa,Spainandhighersensitivityvalues.NanomaterialscancontributecICREA,Barcelona,Spain(Nanobioelectronics&aslabelsortransducersmodifierssoastoimprovetheper-BiosensorsGroup,CatalanInstituteofforma

5、nceofthebiosensor.Someofthereportednanomate-Nanotechnology,CIN2(ICN-CSIC),Universitatrialsarequantumdots(QDs).QDsarecrystallineclustersAutonomadeBarcelona,08193Bellaterra,Catalonia,withanano-size(Murphy,2002),thatcanbesynthesizedSpain;e-mail:arben.merkoci.icn@uab.es)fromsemiconductormaterials(

6、e.g.cadmiumsulphide(Merkoc¸ietal.,2006),cadmiumselenide(Steigerwald&Brus,1990),cadmiumtelluride(Eychm€uller&Rogach,Thedevelopmentofnovelsensorsandbiosensorswithinterest2000),indiumphosphide(Guzelianetal.,1996)orgalliumforfoodindustryisoneofthekeyfieldsforthenowadaysarsenide(Olshavsky,Goldstein,&

7、Alivisatos,1990).Duetonanobiotechnologyandnanomaterialscience.Thefunctional-theirexceptionalopticalproperties(e.g.highquantumizednanomaterialsareusedascatalytictools,immobilizationyield,highmolarextinctioncoefficients,highresistanc