Single Electron Pump
Single Electron Pump - Related Videos
14:58
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Cited by 17 •
2015
The fabrication process and experimental characterization techniques relevant to single-electron pumps based on silicon metal-oxide-semiconductor quantum dots are discussed.
10:53
Scanning-probe Single-electron Capacitance Spectroscopy
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2013
Scanning-probe single-electron capacitance spectroscopy facilitates the study of single-electron motion in localized subsurface regions. A sensitive charge-detection circuit is incorporated into a cryogenic scanning probe microscope to investigate small systems of dopant atoms beneath the surface of semiconductor samples.
05:01
Injectable Mesh Electronics for Stable Single-Neuron Recordings in a Mouse Brain
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2025
The video demonstrates the injection of mesh electronics probes into a mouse brain for stable long-term recordings at a single-neuron level. An anesthetized mouse with an exposed skull is secured on a stereotaxic frame, and the probe's mesh device region is injected into the brain through drilled holes. The probe's input-output pads are connected to a circuit, and recordings are obtained using a data acquisition system.
07:34
A Cost-effective and Reliable Method to Predict Mechanical Stress in Single-use and Standard Pumps
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Cited by 4 •
2015
Shear stress investigations on an oil-water emulsion system result in drop breakup over the experimental time. To count drop sizes in pumping processes, the suitability of inline endoscopy was successfully demonstrated in this protocol.
01:30
ATP Driven Pumps III: V-type Pumps
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2023
V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient. The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
FAQs
Coulomb blockade controls occupancy by preventing additional electrons from entering the conducting island until the device reaches an appropriate charge state. This constraint separates permitted charge configurations and makes transfer occur one electron at a time rather than as an uncontrolled flow. In engineering terms, it provides the charge-selective behavior required for reproducible pumping.
Gate electrodes act on the tunnel barriers rather than directly prescribing an electron’s path. By modulating those barriers around the conducting island, the device controls when charge can access or leave the island. Coordinated barrier control is therefore the main engineering mechanism for shaping a repeatable transfer cycle and maintaining single-electron resolution.
Synchronization establishes repeatable timing for the periodic charge-transfer process. When the device cycle follows an applied frequency, each cycle is associated with the intended movement of one electron, allowing the output to appear as a quantized current rather than an uncontrolled nanoscale signal. This timing relationship supports accurate electrical measurement and controlled device operation.
The conducting island provides the localized region whose charge state determines whether another electron can enter. Because Coulomb blockade restricts additional entry until an appropriate state is reached, the island connects barrier modulation to discrete charge handling. Its nanoscale role is central to converting periodic control into controlled electron-by-electron transfer.
An operating sequence coordinates three elements: gate-electrode modulation, charge-state control at the conducting island, and synchronization with an applied frequency. Barrier changes establish the conditions for the appropriate charge state, Coulomb blockade limits additional entry, and repeated cycles transfer individual electrons. This coordinated sequence produces a periodic electrical output suitable for precise control.
The process can generate a quantized current, meaning the electrical output is tied to controlled, discrete charge transfer rather than an arbitrary continuous flow. Because the transfer is periodic and synchronized with an applied frequency, the device can function as a highly accurate source of electrical current. That outcome is especially important for quantum electrical metrology.
Applications include quantum electrical metrology, where accurate current sources are needed, and charge-based information processing, where individual charges can represent controlled information. Researchers also use these devices to investigate nanoscale transport and quantum devices. These uses reflect the same engineering advantage: precise manipulation of electric charge at very small scales.