Ososayensi bahlakulele ipulatifomu yokuqoqa izinto ezibonakalayo ze-nanosezed, noma "izinto ze-nano," izinhlobo ezahlukene kakhulu - i-inorganic noma i-organic - zibe izakhiwo eziyi-3-D ezifunwayo. Yize ukuzijabulisa (iSA) kusetshenziselwe ngempumelelo ukuhlela ama-nanomatadium ezinhlobo eziningana, inqubo ibilokhu icacisiwe kakhulu, ikhiqiza izakhiwo ezahlukahlukene ngokususelwa kwizakhiwo ezingaphakathi kwezinto zokwakha. Njengoba kubikwa ephepheni elishicilelwe namuhla ezintweni zemvelo, ipulatifomu yazo entsha ye-DNA-Affort Nanofabrication i-Nanofabrication ingafakwa ekuhleleni izinto ezahlukahlukene ze-3-D ngezindlela ezifanayo ezinqunyelwe e-Nanoscale (amakhemikhali amamitha), lapho kuvela khona izakhiwo ze-Optical, Chemionth.
"Enye yezizathu ezinkulu zokuthi i-SA akuyona inqubo yokukhetha izinhlelo zokusebenza ezifanayo ze-SA zingenakusebenza ezintweni ezihlukile ze-nanomatary (CFN) Ihhovisi lomsebenzisi wesayensi eBrookshaven - Futhi uprofesa wobunjiniyela bamakhemikhali kanye ne-physics esetshenzisiwe kanye nesayensi yezezinto zokwakha eColumbia Engineering. "Lapha, sasithobela inqubo yeSA kusuka ezintweni ezibonakalayo ngokuklama ama-POLYHDEDRAL DNA ozimele angavumelanisa izinto ezahlukahlukene ze-InorHitic noma ezi-Organic, kufaka izinsimbi, kanye namaprotheni namaprotheni nama-enzyme."
Ososayensi abazimele be-Engineetic DNA ozimele ngesimo sekhiyubhu, i-octahedron, ne-tetrahedron. Ngaphakathi kwamafreyimu kukhona ama-DNA "Arms" ama-nano kuphela anezinhloso zokulandelana kwe-DNA ezihambisanayo ezingabopha. Lezi voxels ezibonakalayo - ukuhlanganiswa kohlaka lwe-DNA ne-nano-Obser - kukhona amabhlogo wokwakha lapho ama-macroscale 3-D angenziwa khona. Amafreyimu axhumeka komunye nomunye kungakhathalekile ukuthi hlobo luni lwento ye-nano olungaphakathi (noma cha) ngokuya ngokulandelana okuhambisana nalo afakwe ama-vertices. Ngokuya ngesimo sabo, ozimele banenombolo ehlukile yama-vertices futhi ngaleyo ndlela bakha izakhiwo ezahlukene ngokuphelele. Noma yiziphi izinto ze-nano-ezisingathwe ngaphakathi kwamafreyimu athathe leso sakhiwo sohlaka oluthile.
Ukukhombisa indlela yabo yomhlangano, ososayensi abakhethe insimbi (igolide) kanye nama-semiconducting (i-cadmium selenide) namaprotheni angamagciwane (i-strptavidin) njengezinto ze-inorganic nezocansi ezizofakwa ngaphakathi kwama-DNA ozimele. Okokuqala, baqinisekisile ubuqotho bohlaka lwe-DNA nokwakheka kwezimo ezibonakalayo ngokulingisa ngezinto ezinkulu ze-Electron esikhungweni semicrosnon e-Electron Microscopy Isikhungo se-Microscopy kanye namathuluzi okushisa ama-biologen. Base behlola izinhlaka ze-3-D Lattice ezihlakazeke ezibumbene kanzima ze-X-ray ezisakazeka kanye nezinto eziyinkimbinkimbi zokusakazwa komthombo weNational Synchrotron Light Ource II (NSLS-II) - elinye ihhovisi le-dooty lesikhungo sesayensi eBrookhaven Lab. Uprofesa we-Columbia Engineering Bykhovsky woprofesa wobunjiniyela bamakhemikhali weSanat Kumar neqembu lakhe benza amamodeli we-computational eveza ukuthi izinhlaka zezinto ezihlaselwayo (ezisuselwa kumaphethini we-X-ray ahlakazekile) kwakuyizinzilo ezizinzile kakhulu ukuthi izikebhe ezibonakalayo ezingakha.
"Lezi zimongo ezibonakalayo zisivumela ukuthi siqale ukusebenzisa imibono ethathwe kuma-athomu (nama-molecule) kanye namakristalu azokwakha, futhi aphoqelele lolu lwazi olukhulu kanye nemininingwane ezinhlelweni zezintshisekelo zaseNanoscale," kuchaza uKumar.
Abafundi beqembu lezigebengu eColumbia babe khombisa ukuthi ipulatifomu yomhlangano ingasetshenziswa kanjani ukushayela inhlangano yezinhlobo ezimbili ezahlukahlukene zezinto zokwakha ezinemisebenzi yamakhemikhali neyemisebenzi yamakhemikhali. Kokunye, bahlanganisa ama-enzyme amabili, benza ama-3-D Arrarity ngokuqina okuphezulu okupakisha. Yize ama-enzyme ahlala engashintshiwe ngamakhemikhali, akhombisa ukukhuphuka okungamashumi amane emsebenzini we-enzymatic. Lawa "ama-nanoreactors" angasetshenziselwa ukukhohlisa ukusabela kwe-cascade futhi anikeze amandla ukwabiwa kwezinto ezisebenza ngamakhemikhali. Ngombukiso wezinto ezibonakalayo zokubona, baxuba imibala emibili ehlukene yamachashazi we-quantum - ama-nanocrystal asetshenziselwa ukwenza ukuthi kuboniswe amabonakude ngokugcwaliswa kombala okuphezulu nokukhanya. Izithombe ezithunjwe nge-fluorescence microscope zikhombisa ukuthi i-lattice eyakhekile igcina imibala yombala ngaphansi komkhawulo wokuphazamiseka (wavelength) wokukhanya; Le mpahla ingavumela ukuthuthuka okubalulekile kwesinqumo ebuchosheni obuhlukahlukene bokubonisa nobuchwepheshe bokuqonda.
"Kudingeka sicabange kabusha ukuthi izinto zokwakha zingakhiwa kanjani nokuthi zisebenza kanjani," kusho iqembu lezigelekeqe. "Ukuhlelwa kabusha kwezinto ezibonakalayo kungenzeka kungadingeki; ukumane upakisha izinto ezikhona ngezindlela ezintsha kungakhulisa izakhiwo zazo ezilinganisweni ze-3-D ezilinganisweni zezinto ezifunwa kakhulu, ezihlanganisa nalezo ezingabhekwa njengezingahambisani, zingavunyelwa nanomoniguentuncion. "
Izinto ezihlinzekwa yi-Doe / Brookhaven Laboratorin National Laborator. Qaphela: Okuqukethwe kungahlelwa ngesitayela nobude.
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Isikhathi sePosi: Jan-14-2020