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Power

Power

The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...

Instantaneous Power

Instantaneous Power

Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.

Complex Power

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Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...

Electrical Power

Electrical Power

Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...

Sums of Power

Sums of Power

In definite integration, Riemann sums approximate the area under a curve by dividing it into subintervals and summing the areas of rectangles. When these approximations follow predictable numerical patterns, such as arithmetic or polynomial sequences, sum formulas offer a more efficient and accurate way to compute the result. In particular, the sum of consecutive integers, squares, and cubes plays an essential role in simplifying these calculations, especially when dealing with uniform...

Nuclear Power

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Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...

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Related Experiment Video

Updated: Feb 3, 2026

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins

Light-Induced Molecular Adsorption of Proteins Using the PRIMO System for Micro-Patterning to Study Cell Responses to Extracellular Matrix Proteins

Published on: October 11, 2019

Light-Powered Micro/Nanomotors.

Hongxu Chen¹, Qilong Zhao², Xuemin Du³

¹Institute of Biomedical & Health Engineering, Shenzhen Institutes of Advanced Technology (SIAT), Chinese Academy of Sciences (CAS), Shenzhen 518055, China. hx.chen@siat.ac.cn.

|November 6, 2018

Summary

This summary is machine-generated.

Light-powered micro/nanomotors are tiny machines with autonomous fluid motion, showing great promise for biomedical and environmental uses. This review details their design, manufacture, and precise motion control for future applications.

Keywords:

light-powered manufacture micro/nanomotors motion manipulation

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Area of Science:

Materials Science
Nanotechnology
Robotics

Background:

Micro/nanomotors are autonomous machines with potential in biomedical and environmental fields.
Light-powered variants offer precise motion control, enhancing application scope.

Purpose of the Study:

To review recent advancements in light-powered micro/nanomotors.
To compare their design, manufacture, and motion manipulation capabilities.

Main Methods:

Literature review of light-powered micro/nanomotor research.
Analysis of structural features and motion performance.
Discussion of challenges and opportunities.

Main Results:

Overview of various light-powered micro/nanomotor designs and manufacturing techniques.
Comparison of their motion characteristics and performance metrics.
Identification of key challenges and future opportunities in the field.

Conclusions:

Light-powered micro/nanomotors are rapidly evolving machines.
Continued innovation will lead to advanced, intelligent, and multifunctional devices with significant societal impact.