Physics: Make nanotechnology research open-source
To drive innovation at the nanoscale, the patent thicket must be chopped down, argues Joshua M. Pearce.
Nanotechnology: A Review
Nanotechnology is an engineering of functional systems at the molecular level, covers a broad range of topics and is focused on controlling and exploiting the structure of matter on a large scale below 100 nanometers. Nanotechnology is the future of advanced development. It is everything today from clothes to foods there are every sector in its range we should promote it more for our future and for more developments in our current life. In this paper, we have discussed the concept of Nanotechnology along with its history and various applications.
An analytical approach to the design of electrodes in high-power, fast-transverse-flow CO2 lasers
Abstract Usually, the design of the electrodes of fast-transverse-flow CO 2 lasers relies more on experimental data than on theoretical analysis. Traditional systems sustain a stable, high-power discharge but the current distribution generates a peaked, non-uniform small-signal-gain pattern. We present a theoretical model suitable for the design of electrodes that achieves a quasi uniform gain distribution. The analysis, based on a two-temperature model and the gas-transport equations, computes the electron density that supports a flat gain pattern. Combining the desired electron density with the electron-balance equations, the model determines the required electric field. The results were used to design a new set of electrodes for a home-made fast transverse flow CO 2 laser. A stable, large volume discharge ( 4 × 8 × 90 cm 3 ) with very good uniformity was obtained. The resulting gain distribution was registered in a bi-dimensional map. The peak gain rose from 1.2 m - 1 , attained with the old electrode set, to 1.6 m - 1 with the new one and the gain showed a homogeneous profile.