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Submicron sensors of local electric field with single-electron resolution at room temperature
Barbolina, I I; Novoselov, K S; Morozov, S V; Dubonos, S V; Missous, M; Volkov, A O; Christian, D A; Grigorieva, I V; Geim, A K
Applied Physics Letters. 2006;88(1).
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Abstract
We describe probes of a local electric field, which are capable of detecting an electric charge as small as the charge of one electron e, operational under ambient conditions and having a spatial resolution down to 100 nm. The submicron-sized probes were made from a high-density high-mobility two-dimensional electron gas, which is sensitive to the presence of electric charges near its surface. We demonstrate the possibility of using such microprobes for life-science applications by measuring an electric response of individual yeast cells to abrupt changes in their environment. (c) 2006 American Institute of Physics.
Keyword(s)
beam; cell; charge; effect transistor; force microscopy; noninvasive voltage probe
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