Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Generator Voltage Control01:21

Generator Voltage Control

529
Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand, use...
529
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

62.4K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
62.4K
Maximum Power Transfer01:16

Maximum Power Transfer

717
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
717
DC Generator01:19

DC Generator

1.7K
An alternator converts mechanical energy into electrical energy that varies sinusoidally, resulting in AC current. Meanwhile, a DC generator converts mechanical energy into electrical energy, which are DC pulses with the same polarity. The construction of a DC generator is similar to that of an alternator, except that the pair of slip rings is replaced by a single split ring, also called a commutator. The commutator functions like a periodic rotary switch; it changes the contacts with the...
1.7K
Electric Generator: Alternator01:25

Electric Generator: Alternator

3.1K
Electric generators induce an emf by rotating a coil in a magnetic field. A simple alternator is an AC generator that creates electrical energy that varies sinusoidally with time. A simple alternator consists of a conducting loop that is placed inside a uniform magnetic field. The loop is connected to split rings connected to the external circuit with the help of brushes.
The magnetic flux passing through the coil varies sinusoidally as the loop rotates inside the magnetic field. This...
3.1K
Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

992
A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of the...
992

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Simulation of optical absorption in conical nanowires.

Optics express·2021
Same author

Improving the yield of GaAs nanowires on silicon by Ga pre-deposition.

Nanotechnology·2021
Same author

Modeling the dynamics of interface morphology and crystal phase change in self-catalyzed GaAs nanowires.

Nanotechnology·2020
Same author

Modeling selective-area growth of InAsSb nanowires.

Nanotechnology·2019
Same author

Doping assessment in GaAs nanowires.

Nanotechnology·2018
Same author

Tuning the morphology of self-assisted GaP nanowires.

Nanotechnology·2018

Related Experiment Video

Updated: Dec 14, 2025

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

9.7K

Genetic Algorithm Optimization of Core-Shell Nanowire Betavoltaic Generators.

D L Wagner1, D R Novog1, R R LaPierre1

  • 1Department of Engineering Physics, McMaster University, Hamilton, Ontario L8S4L7, Canada.

Nanotechnology
|July 23, 2020
PubMed
Summary

This study optimizes core-shell nanowires for betavoltaic generators using a genetic algorithm. Optimized designs show significant improvements in power output and efficiency for betavoltaic devices.

More Related Videos

Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
11:06

Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices

Published on: July 8, 2016

10.8K
Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
13:29

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

14.5K

Related Experiment Videos

Last Updated: Dec 14, 2025

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

9.7K
Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
11:06

Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices

Published on: July 8, 2016

10.8K
Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
13:29

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

14.5K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Nuclear Engineering

Background:

  • Betavoltaic generators offer a potential power source for microelectronic devices.
  • Optimizing nanowire design is crucial for enhancing betavoltaic device performance.
  • Surface recombination is a key limitation in traditional axial nanowire designs.

Purpose of the Study:

  • To determine the optimal junction design for core-shell nanowires in betavoltaic applications.
  • To investigate the impact of geometric parameters (thickness, height, doping) on device performance.
  • To compare the performance of core-shell nanowires with axial designs.

Main Methods:

  • Numerical optimization using a genetic algorithm.
  • Simulation of energy deposition from various radioisotopes (Ni-63, tritium, etc.).
  • Modeling of silicon, gallium arsenide, and gallium phosphide core-shell nanowire structures.

Main Results:

  • Predicted power output up to 8 µW/cm² and efficiency up to 12%.
  • Core-shell structures significantly reduce surface recombination, improving performance for longer nanowires.
  • Achieved performance closely matches theoretical ideal limits for betavoltaic devices.

Conclusions:

  • Core-shell nanowire design represents a significant advancement in betavoltaic technology.
  • The presented optimization approach and results provide a pathway for developing high-performance betavoltaic generators.
  • Further improvements and practical performance limits are discussed.