Molybdenum trioxide (MoO3) e na le bokhoni ba ho ba ntho ea bohlokoa ea mahlakore a mabeli (2-D), empa tlhahiso ea eona e ngata e saletse morao ho ba bang sehlopheng sa eona. Hona joale, bafuputsi ba A * STAR ba thehile mokhoa o bonolo oa ho hlahisa li-ultrathin, li-nanosheets tsa MoO3 tsa boleng bo holimo.

Kamora ho sibolloa ha graphene, lisebelisoa tse ling tsa 2-D joalo ka transition metal di-chalcogenides, li ile tsa qala ho hohela tlhokomelo e kholo. Haholo-holo, MoO3 e hlahile e le thepa ea bohlokoa ea 2-D semiconducting ka lebaka la thepa ea eona e tsotehang ea elektronike le ea mahlo e nang le tšepiso ea mefuta e mengata ea lisebelisoa tse ncha tsa elektronike, optoelectronics le electrochromics.

Liu Hongfei le basebetsi-'moho le eena ho tsoa ho A*STAR Institute of Materials Research and Engineering le Institute of High Performance Computing ba batlile ho hlahisa mokhoa o bonolo oa ho hlahisa li-nanosheet tse kholo, tsa boleng bo holimo tsa MoO3 tse tenyetsehang le tse bonaletsang.

Liu o re: "Li-nanosheet tse tšesaane tsa molybdenum trioxide li na le lintho tse ncha tse ka sebelisoang mefuteng e mengata ea lisebelisoa tsa elektroniki." Empa ho hlahisa li-nanosheet tsa boleng bo botle, kristale ea motsoali e tlameha ho ba e hloekileng haholo.

Ka ho qala ka ho sebelisa mokhoa o bitsoang thermal vapor transport, bafuputsi ba ile ba ntša phofo ea MoO3 ka har'a sebōpi sa tube ka likhato tse 1,000 tsa Celsius. Joale, ka ho fokotsa palo ea libaka tsa nucleation, li ka bapisa hantle le thermodynamic crystallization ea MoO3 ho hlahisa likristale tsa boleng bo phahameng ka likhato tse 600 tsa Celsius ntle le tlhokahalo ea substrate e itseng.

"Ka kakaretso, khōlo ea kristale mocheso o phahameng o ameha ke substrate," ho hlalosa Liu. Leha ho le joalo, ha ho se na substrate e ikemiselitseng, re ka laola kholo ea kristale hamolemo, ra re lumella ho holisa likristale tsa molybdenum trioxide tse hloekileng le boleng bo holimo.

Ka mor'a ho pholisa likristale mocheso oa kamore, bafuputsi ba ile ba sebelisa exfoliation ea mechine le e nang le metsi ho hlahisa mabanta a submicron-tenya a likristale tsa MoO3. Hang ha ba kenya mabanta ho sonication le centrifugation, ba ile ba khona ho hlahisa li-nanosheets tse kholo, tsa boleng bo phahameng ba MoO3.

Mosebetsi o fane ka lintlha tse ncha mabapi le litšebelisano tsa elektroniki tsa interlayer tsa 2-D MoO3 nanosheets. Mekhoa ea ho hōla ha kristale le exfoliation e entsoeng ke sehlopha e ka boela ea thusa ho laola lekhalo la sehlopha-ka hona thepa ea optoelectronic-ea lisebelisoa tsa 2-D ka ho etsa li-heterojunctions tsa 2-D.

"Hona joale re leka ho etsa li-nanosheet tsa 2-D MoO3 tse nang le libaka tse kholoanyane, hammoho le ho hlahloba tšebeliso ea tsona e ka sebelisoang lisebelisoa tse ling, tse kang lisebelisoa tsa khase," ho bolela Liu.