PIB. The performance of small engines that contain single colloidal particles varies with changes in environmental noise. This is what researchers said in a study that evaluated the response of such micro-engines to fluctuations in noise in the surrounding medium. This insight will be essential for the future construction of microscopic machines that operate in complex biological environments and are becoming increasingly important in biomedical engineering.
Micromechanical machines are at the forefront of science and technology today and have applications ranging from aerospace to biomedical engineering. Recently scientists have experimentally fabricated such machines from single colloidal particles. The mechanical work and power output in these systems are greatly affected by fluctuations in the environment around them. Therefore understanding the role of environmental noise statistics on this type of energy conversion is critical to understanding the operation of such microscopic machines. Just like the naturally occurring molecular motor that drives movement inside a living cell.
A team of researchers at the Jawaharlal Nehru Scientific Research Center (Jawahar Lal Nehru Center for Advanced Scientific Research–JNCASR), an autonomous institute of the Department of Science and Technology, Government of India, and the Indian Institute of Science (IISc), Bangalore developed a one micrometer size Created the Stirling engine (heat engine that converts thermal energy into kinetic energy by heating and cooling a working gas sealed in cylinders), confining a single colloidal particle with a laser trap (trap) .
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Liquids containing colloidal particles with non-thermal noise arising from sources other than temperature, such as thermal noise generated by the strange/random motion of water molecules and fluctuating laser beams In testing the engine’s performance in the presence of condensed reservoirs, the researchers found that the engine was responding to non-thermal noise. This study has recently been published in the ‘Nature Communications’ journal.
A team from Jawaharlal Nehru Scientific Research Center (Jawahar Lal Nehru Center for Advanced Scientific Research-JNCASR) accomplished this with the help of a new technique of reservoir engineering using laser traps to provide artificial noise to colloidal particles Due to which such artificial noise of large amount of variety was produced which was not possible to perceive before. The team also showed that the maximum power output method could be achieved at different cycle-speeds (the time it takes to complete one Stirling cycle) without affecting engine efficiency.
Function, power and efficiency, i.e. the performance of this engine depends on the rate of dispersion of the laser and the relaxation rate of the vibration of the particle. This rate of relaxation can be changed by modifying the environmental noise/fluctuation figures and thereby modifying the performance of this engine. Molecular motors that move within living cells move out of equilibrium in only one direction in the presence of non-thermal noise, and this motion does not involve changes in heat or temperature. Therefore understanding the role of non-thermal noise in the conversion of non-equilibrium energy would be one such insight for building any artificial micro-machines that operate in complex biological environments. Let us tell you that the above information has been published by PIB in the press release.
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