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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Songmei Wu Wildhaber, F. Bertsch, A. Brugger, J. Renaud, P. |
| Copyright Year | 2013 |
| Description | Author affiliation: Microsyst. Lab., EPFL STI-IMT-LMIS, Lausanne, Switzerland (Songmei Wu; Wildhaber, F.; Bertsch, A.; Brugger, J.; Renaud, P.) |
| Abstract | We present here $Al_{2}O_{3}/W$ hetero-structured nanopore membranes which function as native and electrical field tunable nanofluidic diodes. A typical membrane is 100×100 $μm^{2}$ in size with pore density of $~20/μm^{2}.$ The nanopores are 26 nm in diameter and 400 nm in length. Owing to the opposite surface charge states of $Al_{2}O_{3}$ (positive) and W (negative with native oxide), the membrane exhibits clear rectification of ion current in electrolyte solutions. After thermal heating at 350°C for 2 hrs, approximately 10 nm WOx grows on the surface of W, forming a conformal and dense dielectric layer. The W layer allows the application of an electrical field to further modulate the ionic transport through the nanopores with low gate potentials and ultra low gate leakage current. We have demonstrated the control of rectifying factor from 2 to 11. Our experimental findings have a valuable potential for controllable high throughput molecular separation and chemical processors. |
| Starting Page | 998 |
| Ending Page | 1001 |
| File Size | 1047689 |
| Page Count | 4 |
| File Format | |
| e-ISBN | 9781467363525 |
| e-ISBN | 9781467363518 |
| DOI | 10.1109/NEMS.2013.6559890 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-04-07 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Nanobioscience Logic gates Electric potential Aluminum oxide Biomembranes Radio frequency Semiconductor diodes AAO Nanofluidic diode Nanopore membrane heterogeneous nanopore |
| Content Type | Text |
| Resource Type | Article |
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