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|Title: ||不同應力下之石墨烯電特性研究;Study of Electrical Properties of Strained Graphene|
|Issue Date: ||2014-08-11 18:23:25 (UTC+8)|
當施加應力於不同起始片電阻之石墨烯時，石墨烯片電阻上升之比例，為樣品改變之長度約二次方增加，推測其原因可能為彎曲樣品施加應力於石墨烯時，使石墨烯受到拉伸，造成石墨烯之缺陷增加，以致於石墨烯之片電阻上升，石墨烯之載子漂移率，隨著石墨烯之缺陷增加，造成載子散射增加，以致於石墨烯之載子漂移率隨電阻增加而減少，石墨烯之載子濃度，當石墨烯所受之應力增加時，石墨烯之載子濃度隨應力增加而增加，當釋放石墨烯所受之應力時，石墨烯之載子濃度回復至未受應力時之值。;In this thesis, the graphene were grown by chemical vapor deposition. And using wet transfer that graphene were transferred from copper to PET. Then strain exerted to graphene by bending the PET substrate. The electrical property of graphene was measured by Hall measurement system.
The sheet resistivity of graphene was increased rapidly that strain exerted on graphene at first. When the strain exerted on graphene released, the sheet resistivity of graphene was not changed. In the second times and third times that strain exerted on graphene, the sheet resistivity of graphene was not changed. When the strain exerted on graphene bigger than last times, the sheet resistivity of graphene was higher than last times. For the graphene with various initial sheet resistivity`s, the sheet resistivity of graphene were changes with square of the change in sample length. The reason is that the length of graphene was changed with the length of sample was changed. The change in length of graphene, due to the defects of graphene increased. The defects of graphene increase, the sheet resistivity of graphene increased. The mobility of graphene is increased with the defects increased. The carrier scattering of graphene were increased with the defects of graphene increased. The carrier concentration of graphene is increased with the graphene be strained. The carrier concentration of graphene is return to initial with the strain of graphene release.
|Appears in Collections:||[物理研究所] 博碩士論文|
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