Jolly Jacob

Photogated humidity-driven motility

Hygroinduced motion is a fundamental process of energy conversion that is essential for applications that require contactless actuation in response to the day–night rhythm of atmospheric humidity. Here we demonstrate that mechanical bistability caused by rapid and anisotropic adsorption and desorption of water vapour by a flexible dynamic element that harnesses the chemical potential across very small humidity gradients for perpetual motion can be effectively modulated with light. A mechanically robust material capable of rapid exchange of water with the surroundings is prepared that undergoes swift locomotion in effect to periodic shape reconfiguration with turnover frequency of <150 min−1. The element can lift objects ∼85 times heavier and can transport cargos ∼20 times heavier than itself. Having an azobenzene-containing conjugate as a photoactive dopant, this entirely humidity-driven self-actuation can be controlled remotely with ultraviolet light, thus setting a platform for next-generation smart biomimetic hybrids.

Erratum: Photogated humidity-driven motility

Nature Communications 6, Article number: 7429 (2015); Published: 11 June 2015; Updated: 9 July 2015 There were errors associated with the Supplementary Movie legends in the version of this Article originally published, which were introduced while the HTML was being prepared. The legends of Supplementary Movies 2, 3, 4, 8, 9 and 10 were incorrectly assigned to Supplementary Movies 10, 2, 3, 4, 8 and 9, respectively.

A review on carbon trading: new age enterprise for sustainable development and profitability with special reference to UAE

This study is an attempt to analyse carbon emission trading with a special focus on United Arab Emirates. The purpose of the study is to assess how far enterprises are able to sustain carbon-trading mechanism and to analyse the quantum of benefits they derive or the liabilities they encounter. The highlight of this paper is on carbon trading with respect to the Kyoto protocol. Further, it has also been elucidated that greenhouse gas emission leads to climate change. With a view to gain carbon credits, mechanisms to reduce emissions such as; clean development mechanism, joint implementation and emission trade have been presented. In this research, various types of instruments for CO2 trade have been presented which is followed by a detailed literature on carbon trading with respect to UAE. The study concludes that carbon trading in general lacks vision but could be implemented by the government through the creation of policies. As a result, enterprise development would go in tandem with sustainable development.