Kunini lapho into enhle kakhulu iba yimbi? Yilowo mbuzo UJonathan Claussen, umsizi kaprofesa ku UMnyango Wezobunjiniyela Bemishini wase-Iowa State University, kanye nethimba lakhe labacwaningi bahlose ukusiza abalimi ukuthi baphendule uma kuziwa ekusebenziseni izibulala-zinambuzane. Ukusebenzisa kancane kungalimaza izitshalo zabalimi, kanti ukusetshenziswa ngokweqile kungaholela ekugelezeni emhlabathini noma emanzini.
UClaussen nethimba lakhe badale i-biosensor eguquguqukayo, ebiza kancane nelahlwayo ekwazi ukubona izibulala-zinambuzane emhlabathini. Le biosensor yenziwe nge-graphene, i-nanoparticle eqinile futhi ezinzile, futhi inikeza impendulo esheshayo, ngokuphambene nesikhathi nemali ebingayithatha ukuze ithumele isampula elebhu bese ilinda imiphumela.
Isikhungo Sikazwelonke Sokudla Nezolimo se-USDA isekele iphrojekthi nge Uhlelo Locwaningo Lwezolimo Nokudla grant njengengxenye ye Uhlelo lweNanotechnology.
I-biosensor yenziwa ngokuqala ukuphrinta uyinki we-graphene ephepheni. Ilaser ibe isilandelela phezu kukayinki ukuze ithuthukise ukusebenza kwayo kagesi ngokushisela ndawonye ama-flakes kayinki we-graphene, yenze indawo ene-nanostructured enobukhulu obuthathu.
"Ama-flakes acishe abukeke njengama-rose petals avela phezulu ephepheni," kusho uClaussen. "Bakha isisekelo sokuhlola inhlabathi."
Ukuze wenze lokhu, i-biosensor icwiliswa emhlabathini namanzi. Ibe isixhunywa kumfundi we-electrochemical field ukuze kuhlolwe isibulala-zinambuzane.
“Kufana nomugqa wokuhlola i-pH,” kusho uClaussen. Imiphumela yokuhlolwa ingasiza abalimi baqonde ngokushesha ukuthi singakanani isibulala-zinambuzane esidingekayo ukuze kugcinwe izitshalo ezinempilo futhi kuncishiswe ukulimala kwemvelo. Futhi, imiphumela ingasiza abalimi baqonde lapho ukulungiswa kwemvelo kungase kudingeke khona uma ukusetshenziswa ngokweqile kwezibulala-zinambuzane kubonakala.
I-biosensor inamandla amakhulu okusetshenziswa ngaphandle komphakathi wezolimo. Izakhiwo zayo zingaguqulwa ukuze zisetshenziswe emkhakheni wezokwelashwa, imvelo, noma ukuphepha kokudla, ngokushintsha nje izingxenye zebhayoloji ezinganyakazi phezu kwayo.
“Okungithakazelisa kakhulu ngale phrojekthi umthelela wangempela ongawunikeza emhlabeni,” kusho uClaussen. “Izinzwa ze-graphene azidingi ukusetshenziswa kwezinsimbi eziyigugu ezivame ukusetshenziselwa ukukhulisa ukusebenza kwezinzwa ze-electrochemical. Ngakho-ke, [lobu] buchwepheshe ngempela bungasetshenziswa abantu abaningi kuma-electronics nezinzwa eziguquguqukayo/ezibiza kancane.”
- Selina Meiners, Isikhungo Sikazwelonke Sokudla Nezolimo
Umthombo: USDA Blog