The researchers succeeded in making a graphene nano-pencil capable of removing a biomolecule individually.
Graphene, which contains carbon monoxide, has been discovered more than ten years ago and attracted the attention of researchers because of its amazing properties. The applications of this material range from microelectronics to solar cells.
recently Graphene Pins At Minnesota University, they are more effective in trapping particles than other past techniques, because graphene has a thickness of one atom and less than one billionth of a meter. The result of this study in the journal Nature Communications Which is about nanomaterials and related tools.
The world’s sharpest pencil
The physical principle of capturing and trapping nanomaterials is called Di-electrophoresis It is commonly known as a metal electrode pair. However, metal electrodes are very slow in absorbing the molecule and do not have the necessary sharpness to remove and control the nanoparticles.
Graphene, the thinnest substance that has been discovered so far, makes it very effective as a nanoparticle penetrator. Professor Sang Hyun The head of this research team from the university Minnesota Says:
No other material, except graphene, can be used to make this type of pence. To produce efficient electronic pens and to capture biomolecules by means of it, we need to make small electric rods and large amounts of electric current on their sharp tip. Graphene edges can be used as the sharpest bars.
The research team has also proven that graphene pins with the capability of taking semiconducting nanocrystals, nanoparticles, and even DNA molecules can be used in a wide range of biological and physical applications. Normally, it takes a high voltage to remove these nanoparticles, which is limited to the lab environment, but graphene pins can take up to 1 volt of small DNA molecules. Hence, this technology can be used on portable devices such as mobile phones.
Using the Nanotechnology Advanced Nanotechnology Facility at the University of Minnesota, the Electrical and Computer Engineering Department led by Steven Cousteur He managed to make a sandwich structure with graphene. This is called a thin insulating material Hafnium dioxide Between a metal electrode and a graphene surface. Dioxide hafnium is a metal used in modern advanced microchips. Cousteur says:
One of the great things about graphene is that it’s compatible with standard processing tools in the semiconductor industry, which makes them even more commercially commercial in the future.
Narrow avidite Other members of the study team say:
Since we are the first team to build such a low-waste tool for the removal of biomolecules, many studies are still needed to identify theoretical constraints for complete optimization. In the early stages of construction, advanced laboratory tools such as microscopes, fluorescents and electronic instruments were used. Our ultimate goal is to minimize the entire device to a small microprocessor operated by a mobile phone.
Graphene pins can feel
Another striking aspect about this technology that separates graphene pins from metal-based devices is that these pins can feel biomolecules. In other words, pins can display a high sensitivity as a biosensor or biomass sensor and display them using simple electronic techniques.
Cousteur in his description said:
The range of graphene performance is very diverse. It can be used in large transistors and optical detectors and other new biosensors. By increasing the speed of graphene’s performance in capturing and sensing molecules, we can design an ideal and low-power electronic platform in the design of new biosensors.
Hyun believes that these possibilities are infinite and says:
In addition to graphene, we can use a wide range of other two-dimensional materials to make sharp atomic pins with unusual electronic and optical features. It’s really exciting that atomic tweaks can work electronically in applications such as removing, sensing and releasing biomolecules.