Three-dimensional, Flexible Nanoscale Field Effect Transistors as Localized Bioprobes

By B. Tian, Tzahi Cohen‐Karni, Quan Qing, Xiaojie Duan, Ping Xie, Charles M. Lieber. Science, 2010

769 citations recorded by the source corpus.

Nanoprobes of Cell Potential Direct electrical measurements of cell potentials usually face design compromises. Microelectrodes probe within the cytosol of cells but have a minimum size (hundreds of nanometers in width) for obtaining useful signals. Nanoscale field effect transistors (FETs) can have an active probe size of only tens of nanometers but generally allow only the outer cell potential to be measured. Tian et al. (p. 830) fabricated nanowires in which kinks could be introduced to create a sharp probe tip pointing away from the fabrication substrate. Coating the tip with a phospholipid bilayer allowed the probe to be inserted through the membranes of beating cardiac cells, where it could be used to follow temporal changes in cell potential. Kinked nanowire transistors can measure intracellular electric potentials. Nanoelectronic devices offer substantial potential for interrogating biological systems, although nearly all work has focused on planar device designs. We have overcome this limitation through synthetic integration of a nanoscale field-effect transistor (nanoFET) device at the tip of an acute-angle kinked silicon nanowire, where nanoscale connections are made by the arms of the kinked nanostructure, and remote multilayer interconnects allow three-dimensional (3D) probe presentation. The acute-angle probe geometry was designed and synthesized by controlling cis versus trans crystal conformations between adjacent kinks, and the nanoFET was localized through modulation doping. 3D nanoFET probes exhibited conductance and sensitivity in aqueous solution, independent of large mechanical deflections, and demonstrated high pH sensitivity. Additionally, 3D nanoprobes modified with phospholipid bilayers can enter single cells to allow robust recording of intracellular potentials.

Subfields: Atomic and Molecular Physics, and Optics, Cellular and Molecular Neuroscience, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/e6197542ae3e2108cb2604900e6a8c4ebc312ea4

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In Atomic and Molecular Physics, and Optics

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Citations in the corpus

Syringe injectable electronics (2015, methodology): “, Wood Dale, IL) and then (5) a 1 mm longitudinal incision was made, and the skin was resected from the center axis of the skull, exposing a 2 mm by 2 mm portion of the skull.”
Multi-electrode array technologies for neuroscience and cardiology. (2013, methodology): “To facilitate the penetration of the electrodes into the cells the device’s surface was modified by phospholipids 77 .”