[SCAN] Soild-State Nanopores: Materials, Fabrication and Performance
James Yates
| When |
20 Oct, 2021
from
12:00 pm to 01:00 pm |
|---|---|
| Contact Name | Rita Abranches |
| Add event to your calendar |
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Title: Soild-State Nanopores: Materials, Fabrication and Performance
Speaker: James Yates
Abstract: Solid-state nanopores are a powerful, label-free platform suitable for a wide range of (bio)sensing applications. Controlled breakdown (CBD) has recently emerged as an appealing technique with which to fabricate nanopores. CBD is performed by applying an electric field of approximately 0.4–1 V/nm across the membrane to induce a current, and, eventually, breakdown of the dielectric. Previous studies have performed controlled breakdown under a range of different conditions, but the mechanism of conduction and breakdown has not been fully explored. We have been studying electrical conduction and nanopore formation in SiNx membranes during CBD. We show that for Si-rich SiNx, oxidation reactions that occur at the membrane-electrolyte interface limit conduction across the dielectric. However, for stoichiometric Si3N4 the effect of oxidation reactions becomes relatively small and conduction is mostly limited by charge transport across the dielectric
ITQB NOVA Virtual Auditorium
