Iqela labaphandi abavela kwiiyunivesithi zaseScotland, ePortugal naseJamani liphuhlise isixhobo sokuvavanya esinokunceda ekufumaneni ubukho bezibulali-zinambuzane ezikwizinga eliphantsi kakhulu kwiisampuli zamanzi.
Umsebenzi wabo, ochazwe kwiphepha elitsha elipapashwe namhlanje kwiphephancwadi iPolymer Materials and Engineering, unokwenza ukujongwa kwamanzi kube lula, kube lula, kwaye kube nexabiso eliphantsi.
Izibulali-zinambuzane zisetyenziswa kakhulu kwezolimo kwihlabathi liphela ukuthintela ukulahleka kwezityalo. Nangona kunjalo, kufuneka kuqatshelwe, kuba nokuvuza okuncinci emhlabeni, emanzini angaphantsi komhlaba okanye emanzini olwandle kunokubangela ingozi kwimpilo yabantu, yezilwanyana kunye neyokusingqongileyo.
Ukubeka iliso rhoqo kwindalo esingqongileyo kubalulekile ukunciphisa ungcoliseko lwamanzi ukuze kuthathwe amanyathelo ngokukhawuleza xa kufunyenwe izibulali-zinambuzane kwiisampuli zamanzi. Okwangoku, uvavanyo lwezibulali-zinambuzane ludla ngokwenziwa phantsi kweemeko zelebhu kusetyenziswa iindlela ezifana ne-chromatography kunye ne-mass spectrometry.
Nangona ezi mvavanyo zibonelela ngeziphumo ezithembekileyo nezichanekileyo, zinokuthatha ixesha elide kwaye zibize kakhulu ukuzenza. Enye indlela ethembisayo sisixhobo sohlalutyo lweekhemikhali esibizwa ngokuba yi-surface-enhanced Raman Scattering (SERS).
Xa ukukhanya kubetha imolekyuli, kuyasasazeka ngamaxesha ahlukeneyo kuxhomekeke kwisakhiwo semolekyuli yemolekyuli. I-SERS ivumela izazinzulu ukuba zibone kwaye zichonge inani leemolekyuli eziseleyo kwisampulu yovavanyo efakwe kumphezulu wesinyithi ngokuhlalutya "iminwe" ekhethekileyo yokukhanya okusasazeke ziimolekyuli.
Esi siphumo sinokuphuculwa ngokuguqula umphezulu wesinyithi ukuze ukwazi ukufunxa iimolekyuli, ngaloo ndlela kuphuculwe amandla e-sensor okufumanisa amazinga aphantsi eemolekyuli kwisampuli.
Iqela lophando lizimisele ukuphuhlisa indlela entsha yokuvavanya enokufunxa iimolekyuli kwiisampuli zamanzi kusetyenziswa izixhobo eziprintiweyo ze-3D ezikhoyo kwaye zibonelele ngeziphumo zokuqala ezichanekileyo kweli candelo.
Ukuze benze njalo, bafunde iintlobo ezahlukeneyo zezakhiwo zeeseli ezenziwe ngomxube we-polypropylene kunye neetyhubhu zekhabhoni ezineendonga ezininzi. Izakhiwo zenziwe kusetyenziswa iifilaments ezinyibilikisiweyo, uhlobo oluqhelekileyo loshicilelo lwe-3D.
Ngokusebenzisa iindlela zemveli zekhemistri emanzi, ii-nanoparticles zesilivere negolide zifakwa kumphezulu wesakhiwo seseli ukuze kusebenze inkqubo yokusasazwa kweRaman ephuculweyo kumphezulu.
Bavavanye ubuchule bezakhiwo ezahlukeneyo zeeseli eziprintiweyo ze-3D zokufunxa nokufunxa iimolekyuli zedayi ye-organic methylene blue, baze bazihlalutya besebenzisa i-Raman spectrometer ephathekayo.
Izinto ezisebenze kakuhle kwiimvavanyo zokuqala - uyilo lwelattice (izakhiwo zeeseli ezihlala ixesha elithile) ezibotshelelwe kwi-nanoparticles zesilivere - zongezwa kwi-test strip. Izixa ezincinci zezibulali-zinambuzane zokwenyani (iSiram kunye neparaquat) zongezwa kwiisampuli zamanzi olwandle kunye namanzi acocekileyo zaza zabekwa kwi-test strip ukuze kuhlalutywe i-SERS.
Amanzi athathwa emlonyeni womlambo e-Aveiro, ePortugal, nakwiimpompo ezikuloo ndawo inye, ezivavanywa rhoqo ukuze kujongwe ngokufanelekileyo ungcoliseko lwamanzi.
Abaphandi bafumanise ukuba imicu ikwazile ukubona iimolekyuli ezimbini zezibulali-zinambuzane kumanqanaba aphantsi njenge-1 micromole, elingana nemolekyuli enye yezibulali-zinambuzane kwisigidi seemolekyuli zamanzi.
UNjingalwazi uShanmugam Kumar, ovela kwiSikolo soBunjineli saseJames Watt kwiYunivesithi yaseGlasgow, ngomnye wababhali beli phepha. Lo msebenzi wakhela kuphando lwakhe malunga nokusetyenziswa kwetekhnoloji yokuprinta ye-3D ukwenza iilattices zesakhiwo ezi-nanoengineered ezineempawu ezizodwa.
“Iziphumo zolu phononongo lokuqala ziyakhuthaza kakhulu kwaye zibonisa ukuba ezi zinto zingabizi kakhulu zingasetyenziselwa ukuvelisa izixhobo zokuvavanya i-SERS ukuze zifumane izibulali-zinambuzane, nokuba ziphantsi kakhulu.”
UDkt. Sara Fateixa ovela kwi-CICECO Aveiro Materials Institute kwiYunivesithi yase-Aveiro, umbhali-mbhali wephepha, uphuhlise ii-plasma nanoparticles ezixhasa itekhnoloji ye-SERS. Ngelixa eli phepha lihlola amandla enkqubo okufumanisa iintlobo ezithile zezinto ezingcolisayo emanzini, itekhnoloji ingasetyenziswa ngokulula ukujonga ubukho bezinto ezingcolisayo emanzini.
Ixesha leposi: Jan-24-2024