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Versatile and scalable chemical vapor deposition of vertically aligned MoTe2 on reusable Mo foils

Nano Research 2020年第9期13卷 2371-2377页

作者： Jinjun Lin Hong Wang Roland Yingjie Tay Hongling Li Maziar Shakerzadeh Siu Hon Tsang Zheng Liu edwin hang tong teo School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Temasek Laboratories@NTU 50 Nanyang AvenueSingapore 639798Singapore School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

Layered MoTe2 has shown great promises for optoelectronics and energy-storage applications due to its exceptional optical and electrochemical *** date,considerable efforts have been devoted to fabricating layered MoTe2 with lateral orientation by means of mechanical/chemical exfoliation and chemical vapor deposition(CVD)*** compared to its horizontal counterparts,vertically aligned MoTe2 with higher density of active edge sites is expected to possess unique optoelectronic and electrochemical properties,while which has not been reported *** this work,we report a versatile and scalable CVD growth of vertically aligned MoTe2 with length of up to〜7.5 fjm on Mo ***,the dominant phase of the vertically aligned MoTe2 can be tuned from 2H to 1T’by increasing the growth temperature from 630 to *** to the weak interaction between the as-grown MoTe2 and Mo foil,the as-grown MoTe2 can be easily detached from the Mo *** in turn enabled economic reuse of the Mo foil for multiple ***,the vertical growth of the MoTe2 is proposed to be caused by the internal strain generated during tellurization of Mo ***,the as-grown MoTe2 can also be directly dispersed in solvent to produce high-quality MoTe2 *** versatility of this growth strategy was further demonstrated by fabricating other vertically aligned transition metal chalcogenides(TMDs)such as TaTe2 and ***,this work paves the path towards achieving unique TMDs structures to enable high-performance optoelectronic and electrochemical devices.

关键词： molybdenum dltelluride chemical vapor deposition vertical growth reusable substrate

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