電氣工程外文翻譯---一種基于單壁碳納米管的納米可調(diào)諧壓力開關(guān)系統(tǒng)的設(shè)計(jì)-電氣類-文庫(kù)吧資料
2025-01-27 03:08本頁(yè)面
【正文】 mechanism of suggested pressure switch consists of a both end fixed SWNT, a conductive ground plane and a tuneable voltage source to induce voltage between the SWNT and the ground plane(). CONCLUSIONS In summary, a tuneable pressure switch has been obtained which uses only one SWNT and its mechanism run as following: When a Pullin voltage related to a certain pressure is induced to the system, the SWNT does not kink and does not on the ground plane, until the applied pressure reaches to that certain due to the application of pressure and voltage, SWNT collapses on the ground plane, because both of them are conductive, an electric circuit is closed and the switch is considered a result, its sensing and switching mechanism is much simpler in parison to previous presented pressure sensor because a plicated system which is able to sense the difference between a conductive and semi conductive material is eliminated. The recent system, also, is able to switch at any desire pressure which is obtainable by its resolution within is sensing range(Its pressure sensing range is between zero and used SWNT the first transition pressure). Hence, it is not restricted to few pressure of limited numbers of SWNT39。s traansition pressure. To understand the mechanism of the switch on which the design is based, SWNT transition pressure and pullin phenomenon are illuminated in the follow sections. TRANSITION PRESSURE Zang et al.(2021), Sun et al.(2021) and Sood (2021) showed that SWNTs under applied hydrostatic pressure encounter phase transition. This phase transition is due to difference between energy which is needed to alter CarbonCarbon bond length and CarbonCarbonCarbon angle. At first stage, the SWNT cross section reduces uniformly and proportionally under pressure, which is the result of CarbonCarbon bond uniform length reduction. At a certain point, the cross section shape collapses from circular to elliptical. In this case, the SWNT deformation is much lager than previous. The reason is: CarbonCarbonCarbon angle variation needs much less energy in parison to CarbonCarbon bond length variation. Thus, SWNT undergoes a greater deformation after facing pressure higher than its first transition pressure. As a result, the isotropic SWNT turns into
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