Carbin - carbon-dimensional carbon
Joalokaha koranta ea Nature Materials e tlalehile ka October 2016, bo-rasaense ba Faculty of Physics Univesithing ea Vienna ba khonne ho fumana mokhoa oa ho etsa carbine e tsitsitseng, i.e. carbon-dimensional carbon, e nkoang e le matla ho feta graphene (khabone ea mahlakore a mabeli).
E ntse e nkuoa e le ts'epo e kholo le sesupo sa phetoho ea lintho tse bonahalang, le pele e ka ba ntho ea nnete ho thekenoloji, graphene e kanna ea tlosoa teroneng ke motsoala oa eona ea thehiloeng ka khabone - Carbine. Lipalo li bontšitse hore matla a ho tiea a carbyne a phahame ka makhetlo a mabeli ho feta a graphene, athe ho tiea ha eona ho ntse ho phahame ka makhetlo a mararo ho feta a daemane. Carbyne ke (theoretically) e tsitsitseng mocheso oa kamore, 'me ha likhoele tsa eona li bolokoa hammoho, li kopana ka tsela e ka tsejoang esale pele.
Ena ke mofuta oa carbon allotropic o nang le sebopeho sa polyalkyne (C≡C)n, moo liathomo li etsang liketane tse telele tse nang le li-bond tse peli tse fapanyetsanang kapa tse bokelletsoeng habeli. Tsamaiso e joalo e bitsoa sebopeho sa lehlakore le le leng (1D) hobane ha ho letho le leng le khomaretsoeng le khoele e botenya ba athomo. Sebopeho sa graphene se lula se le mahlakore a mabeli, kaha se telele ebile se pharaletseng, empa lakane e na le athomo e le 'ngoe feela. Lipatlisiso tse entsoeng ho fihlela joale li fana ka maikutlo a hore mofuta o matla ka ho fetisisa oa carabiner o tla ba le likhoele tse peli tse kopantsoeng (1).
Ho fihlela morao tjena, ho ne ho sa tsejoe hakaalo ka carbine. Litsebi tsa linaleli li re e qalile ho bonoa meteorite le lerōleng la linaleli.
Mingji Liu le sehlopha sa Univesithi ea Rice ba balile thepa ea theory ea carbine, e ka thusang lipatlisisong tsa mahlale. Bafuputsi ba hlahisitse tlhahlobo e nkang liteko tse lekang matla a ho tsitsa, matla a ho feto-fetoha ha maemo, le deformation ea torsional. Ba ile ba lekanya hore matla a khethehileng a carbyne (ke hore matla a boima ba 'mele) a boemong bo e-s'o ka bo e-ba teng (6,0-7,5 × 107 N∙m / kg) ha e bapisoa le graphene (4,7-5,5. 107 × 4,3 N∙m / kg), carbon nanotubes (5,0-107 × 2,5 N∙m / kg) le daemane (6,5-107 × 10 N∙m / kg). Ho khaola tlamo e le 'ngoe ka ketane ea liathomo ho hloka matla a ka bang 14 nN. Bolelele ba ketane mocheso oa kamore ke hoo e ka bang XNUMX nm.
Ka ho eketsa sehlopha se sebetsang CH2 pheletso ea ketane ea carbine e ka sotheha joalo ka khoele ea DNA. Ka "ho khabisa" liketane tsa carabiner tse nang le limolek'hule tse sa tšoaneng, thepa e meng e ka fetoloa. Ho eketsoa ha liathomo tse itseng tsa k’halsiamo tse tlamahaneng le liathomo tsa haedrojene ho tla fella ka seponche sa polokelo ea haedrojene se sengata haholo.
Thepa e thahasellisang ea thepa e ncha ke bokhoni ba ho theha maqhama ka liketane tse mahlakoreng. Mokhoa oa ho theha le ho khaola maqhama ana a ka sebelisoa ho boloka le ho lokolla matla. Ka hona, carabiner e ka sebetsa e le thepa e sebetsang haholo ea ho boloka matla, kaha limolek'hule tsa eona ke athomo e le 'ngoe ka bophara,' me matla a thepa a bolela hore ho tla khoneha ho pheta-pheta le ho senya maqhama ntle le kotsi ea ho senya. molek'hule ka boeona ea senyeha.
Ntho e 'ngoe le e' ngoe e bontša hore ho otlolla kapa ho sotha carabiner ho fetola thepa ea eona ea motlakase. Litsebi tsa khopolo-taba li bile li fana ka tlhahiso ea ho beha "li-handles" tse khethehileng lipheletsong tsa molek'hule, e leng se neng se tla u lumella hore u fetole ka potlako le ha bonolo lekhalo la conductivity kapa sehlopha sa carbyne.
2. Ketane ea li-carabiners ka hare ho sebopeho sa graphene
Ka bomalimabe, thepa eohle e tsejoang le e e-s'o fumanoe ea carbine e tla lula e le khopolo e ntle feela haeba re ke ke ra hlahisa thepa ka theko e tlaase le ka bongata. Li-lab tse ling tsa lipatlisiso li tlalehile ho lokisa carbine, empa thepa e ipakile e sa tsitsa haholo. Litsebi tse ling tsa k'hemistri le tsona li lumela hore haeba re hokahanya likhoele tse peli tsa carabiner, ho tla ba le ho phatloha. Ka April selemong sena, ho ne ho e-na le litlaleho tsa tsoelo-pele ea carabiner e tsitsitseng ka mokhoa oa likhoele ka hare ho "marako" a sebopeho sa graphene (2).
Mohlomong mokhoa oa Univesithi ea Vienna o boletsoeng qalong ke katleho. Re lokela ho fumana kapele.
