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sachin dattatray pable

SWCNT bundle

Hi, I am having some queries in SWCNT bundle analysis using CNIA. In case of capacitance analysis, CNIA shows very small quantum capacitance for SWCNT bundle as compared to the theoretical value( from previous research). Therefore, total capacitance of SWCNT bundle shows 4-5 times improvement over Cu. Whereas, previous research shows that these are almost same.please reply for the same comment

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    Sansiri Tanachutiwat

    Could you please indicate the theoretical studies (from previous research) that you referred to? So, I can give you some precise answers.

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      Anonymous

      Respected Sir, It is well known that quantum capacitance of an individual CNT is 400aF/um. Output file for SWCNT bundle analysis for 22nm technology is given below. Where quantum capacitance is 97af/um. Where it should be, CQ*CNTS= 20,000af/um for a bundle containing 50 nanotubes. In following analysis total bundle capacitance is approximately equal to CQ, not CE as from previous research. ref. 1. Navin Srivastav et.al, “ on the applicability of Single-Walled carbon nanotubes as VLSI interconnects,” IEEE trans. on nanotechnology,vol.8,No.4, July 2009. 2. Every research on SWCNT bundle shows that quantum capacitance is very large compared to electrostatic capacitance and total capacitance of dense SWCNT bundle (pm=1) is almost equal to CU. I have given the CNIA output file for your ref at pm=1(metallic density) and same trend is observed at all pm. At same geometry parameters Cu capacitance is 157af/um which is almost 3X the SWCNT bundle due to low CQ. Geometry Bundle Width (nm): 2.200000e-08 Bundle Height (nm): 4.400000e-08 Bundle Length (um): 1.000000e-06 – Process Density: 5.000000e+16 Average diameter (nm): 1.000000e-09 Standard variation (nm): 0 Dmin/Dmax: 1 Pmetal: 1 – CNT Carbon-carbon distance (A): 1.420000e-10 Shell-shell distance (A): 3.400000e-10 Tight binding energy (eV): 3 – Abmient Temperature (K): 300 Output – Bundle Total number of carbon nanotubes (#): 50 CNT-to-CNT spacing (nm): 4.805623e+00 – Conduction Channels Total number of electrical conduction channels (#): 2 Total number of thermal conduction channels (#): 1.372800e+03 – Electrical Conductance Electrical conductance of the bundle (Ohm^-1): 6.887193e-03 Resistance of the bundle (Ohm): 1.451970e+02 – Inductance Kinetic inductance of the bundle (Henry): 4.033251e-09 Magnetic inductance of the bundle (Henry): 7.735243e-13 Total inductance of the bundle (Henry): 4.034024e-09 – Capacitance Quantm capacitance of the bundle (F): 9.685115e-17 Electrostatic capacitance of the bundle (F): 1.291355e-16 Total capacitance of the bundle (F): 5.534363e-17

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      sachin dattatray pable

      CAn ypu send your email Id so that we can communicate on the same topic very well.

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