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High-Throughput Nanogap Formation Using Single Ramp Feedback Control

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5 Author(s)
Johnson, S.L. ; Dept. of Phys. & Astron., Univ. of Kentucky, Lexington, KY, USA ; Hunley, D.P. ; Sundararajan, A. ; Johnson, A.T.C.
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We demonstrate a technique for simultaneously fabricating arrays of electromigrated nanogaps using a single-ramp feedback-controlled voltage clamp. The parallel formation is achieved by controlling the applied bias with a voltage clamp directly adjacent to a nanogap array containing low-impedance shunts. Self-balancing of the electromigration permits the two voltage leads to fix the applied voltage across all the forming nanogaps simultaneously. This single-ramp feedback-controlled voltage clamp method is at least a 100 times faster than previous work utilizing computer feedback control of parallel nanojunctions and also circumvents the deleterious thermal runaway that occurs in the conventional single-ramp technique.

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Nanotechnology, IEEE Transactions on  (Volume:10 ,  Issue: 4 )