Molybdenum trioxide (MoO3) nwere ike dị ka ihe dị mkpa akụkụ abụọ (2-D), ma nnukwu mmepụta ya adaala n'azụ nke ndị ọzọ na klaasị ya. Ugbu a, ndị na-eme nchọpụta na A * STAR ewepụtala usoro dị mfe maka ịmepụta ultrathin, moO3 nanosheets dị elu.

N'ịgbaso nchọpụta graphene, ihe ndị ọzọ 2-D dị ka metal di-chalcogenides mgbanwe, malitere ịdọrọ mmasị dị ukwuu. Karịsịa, MoO3 pụtara dị ka ihe dị mkpa 2-D semiconducting ihe n'ihi na ya dị ịrịba ama electronic na anya Njirimara nke na-ekwe nkwa maka a nso nke ọhụrụ ngwa na ngwá electronic, optoelectronics na electrochromics.

Liu Hongfei na ndị ọrụ ibe si A * STAR Institute of Materials Research and Engineering and Institute of High Performance Computing achọla ịmepụta usoro dị mfe maka oke na-emepụta nnukwu nanosheets dị elu nke MoO3 nke na-agbanwe agbanwe na nke doro anya.

"Nanosheets molybdenum trioxide dị gịrịgịrị nwere ihe ọhụrụ nwere ike itinye n'ọrụ n'ọtụtụ ngwa eletrọnịkị," Liu na-ekwu. "Ma iji mepụta nanosheets dị mma, kristal nne na nna ga-abụrịrị ịdị ọcha nke ukwuu."

Site na iji usoro a na-akpọ ụgbọ njem ikuku thermal, ndị nchọpụta ahụ kpochapuru ntụ ntụ MoO3 n'ime ọkụ tube na 1,000 degrees Celsius. Mgbe ahụ, site n'ibelata ọnụ ọgụgụ nke saịtị nucleation, ha nwere ike ka mma dakọtara na thermodynamic crystallization nke MoO3 iji mepụta kristal dị elu na 600 degrees Celsius na-enweghị mkpa maka otu mkpụrụ.

"N'ozuzu, kristal na-eto eto na okpomọkụ dị elu na-emetụta mkpụrụ osisi," Liu na-akọwa. "Otú ọ dị, na-enweghị ihe e bu n'obi mee mkpụrụ, anyị nwere ike ịchịkwa uto kristal nke ọma, na-enye anyị ohere itolite kristal molybdenum trioxide nke ịdị ọcha na ịdị mma."

Mgbe emechara kristal ahụ ka ọ dị ọkụ, ndị nyocha ahụ jiri igwe na-emepụta ihe na-emepụta ihe na-emepụta eriri submicron nke kristal MoO3. Ozugbo ha doro eriri na sonication na centrifugation, ha nwere ike ịmepụta nnukwu moO3 nanosheets dị elu.

Ọrụ ahụ enyela nghọta ọhụrụ na mmekọrịta eletrọnịkị interlayer nke 2-D MoO3 nanosheets. Uto kristal na usoro mkpochapụ nke ndị otu ahụ mepụtara nwekwara ike inye aka n'ịgbanwe ọdịiche nke band — ya mere akụrụngwa optoelectronic — nke ihe 2-D site n'ịmepụta 2-D heterojunctions.

"Anyị na-agbalị ugbu a ịmepụta 2-D MoO3 nanosheets na mpaghara buru ibu, yana ịchọpụta ihe ha nwere ike ime na ngwaọrụ ndị ọzọ, dị ka ihe mmetụta gas," ka Liu na-ekwu.