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【正文】 per length is found by classic capacitance model as: Where ε0 is vacuum permittivity, V is include voltage, Rnt is SWNT radius and r is SWNT and ground plane distance. Wang and Varadan(2021) prove that this instability is because of SWNT kink under bending conditions, which has been observed by high resolution transmission electron, when the strain energy at the inner wall of the pressive side reaches the critical value. Since stress and strain follow a linear distribution in radial direction, it is reasonable to assume that kink instability happens when inplane strain under uniformly distributed pression. The kink slope being a function of dnt can be found by: That L is SWNT length, dNT, is its diameter and h is SWNT effective thickness. DEFINITION OF TUNEABLE PRESSURE SWITCH By bining the above mentioned concepts about Pullin phenomenon and transition pressure of SWNTs, the tuneable pressure switch mechanism can be defined. As it can be seen, from , the θer is a function of SWNT diameter. While a hydrostatic pressure is applied on SWNT, its diameter reduces uniformly and proportionally to the applied pressure: WheredNT0 is SWNT39。s initial diameter (at zero pressure) and E is its effective young Modulus () To calculate the Pullin voltage, elastic and electrostatic domains should be considered. Van der Waals forces are quite small in parison to electrostatic force。 therefore, they are neglected in this study. The system obeys the classical beam equation Which is highly nonelinear. Therefore, it has no analytical solution. Without losing the generality, it is possible to use lump model derived by Dequensenes et al.(2021) which assumes bending electrostatic force distribution is uniform before Pullin phenomenon happens. The pullin voltage for a lump model is calcuated by: That rinit is the initial distance between SWNT and ground plane and rpl=2rinit/3 is the distance which Pullin happens. By considering RNT as a function of applied pressure, the relation between Pullin voltage and applied pressure is obtained(). In consequence, the 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 transition pressure. The resolution of voltage inducement, determines the resolution of pressure switching which is Pt V. Here for such a typical system, the kink and deflection graphs for two pressure conditions are brought. The SWNT effective physical properties are as followings, which was calculated by authors based on interatomic force field constants for Carbon lattice presented by Leamy(2021)。L=,dNT0=,rinit=6nm,h= and Eeffective=( and 9). 翻譯（二）：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 SSHosseini 亞茲迪和 Ma
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