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Graphene Shoe Drying Agent

02.05.2020

Silica gel is the most common chemical agent for providing a dry space in many things, especially in shoes, where it is placed in a special niche under the sole - which helps to prevent the accumulation of excessive amounts of moisture and the growth of fungi. However, microbiologists from the Australian University of New South Wales today presented the results of their work on the properties of graphene oxide as such a chemical agent - based on such a well-known material as graphene, this variety of it really has impressive capabilities.

Specialists have long observed the action of graphene oxide - consisting of hydrogen, carbon and oxygen atoms - in the context of its interaction with other chemical agents and direct moisture on various surfaces. They created a special multilayer graphene structure, where each layer serves as a certain insulator of absorbed moisture, which makes it possible to absorb it noticeably faster and more efficiently, unlike traditional agents of this type.

In particular, the scientists found that their new graphene structure has the ability to absorb up to 0,58 g of water per 1 g of graphene oxide, which is a really promising result. What's more, they found that each layer is particularly easy to control when exposed to certain light and laser patterns - and this could lead to the development of new graphene systems.

The scientists point out that in the course of studying the properties of graphene, they found that by changing the scale of the space between each individual layer of the structure, they can achieve ultra-precise tuning of the speed and frequency at which graphene oxide absorbs water. This last aspect will definitely come in handy in creating new technological systems for using graphene as a drying chemical agent, especially since from an economic point of view, its use is quite justified and more rational than silicon.

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Dutch engineers have created a flying robot weighing three grams.

The new dragonfly robot named "DelFly Micro", weighing three grams and with a wingspan of ten centimeters, continues the series of flying robots being developed at the Delft Institute of Technology. Its predecessors - "DelFly I" and "DelFly II" - were larger: 23 g and 50 cm, as well as 16 g and 30 cm, respectively. The new robot is capable, obeying the operator's signal, to flutter like a dragonfly and transmit a video image using a miniature camera. And the batteries are enough for him for three minutes of flight at a speed of 5 m / s.

For the sake of weight reduction, something had to be sacrificed: "DelFly II" could not only fly horizontally, but hover over a certain point and move backwards. The new robot does not yet know how, but it is able to get into the most secluded place and show the researchers what is there. After some time, it will be equipped with a pattern recognition system, and it will be able to fly completely independently.

This robot was an important step towards the goal set by the Dutch roboticists: to make an artificial dragonfly weighing one gram and with a wingspan of 5 cm.

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