New way to control blood clotting using lasers and nanoparticles

Engineers of the Massachusetts technological university developed the system founded on nanoparticles with help of which it is possible to switch off and include blood clotting by light of lasers reversibly. The principle of work of system is based on release in due time substances, either blocking, or restoring work of one of factors of blood clotting — thrombin. Each of two substances was attached to cylindrical gold nanoparticles of one of two types – short and long. Radiation by the high-frequency laser led to release of the substance attached to short nanoparticles, but didn’t influence that was recorded on long and vice versa. As a blocker scientists used a special aptamer – the artificial fragment of DNA which has been selected on force of affinity to this factor of blood clotting .

Carbon nanotubes helped scientists to hear vibrations of molecules

Physics adapted carbon nanotubes for exact measurement of force of vibrations of molecules and atoms. That will allow using them for manipulations to backs in quantum computers or supervision over separate molecules and atoms. Carbon nanotubes are similar to guitar strings, which vibrate when to them apply force. In a case with our experiment, these forces were so small that they can be compared to gravitational interaction, which arises between two people at distance in 4,5 thousand kilometers. Bachtold and his colleagues by 50 times improved the accuracy of measurement of forces of a nuclear magnetic resonance. They experimented carbon nanotubes at ultra low temperatures.

Nanofibers from most durable and flexible material

Scientists created nanofibers surpassing in durability all composite materials. The created heavy-duty and super elastic nanofibers, capable to replace all existing composite materials used everywhere from planes to bicycles. Among participants of the project there are two scientists from Russia Alexander Goponenko and Dmitry Papkov. Engineers developed the most durable nanofibers consisting of polyacrylonitrile, the acrylic synthetic polymer, which was a version, which receive an electrospinning method. There is a pump at a design typical spinning design. The pomp provides uniform supply of liquid to the carrying-out needle, a collecting plate and the high-voltage source creating a field in an interval between a tip of a needle and a plate. The solution contacting to a metal needle, is loaded, and the charges entered into it are accelerated by electric field and involve in movement surrounding substance, why liquid is evenly accelerated and extended in a squirt. In an interelectrode gap solvent partially evaporates, and the stream turns into fiber, which is besieged on a plate and creates a porous layer.

Nanowires as sources for Solar Cell Efficiency

The researchers discovered that a simple nanowire crystal can concentrate the intensity of the sunlight. This discovery means that the limit of solar cell efficiency can be increased. The discovery will help to lead new types of high-efficiency solar cells, also, will be used in the quantum computers and electronics. The crystals of nanowires have cylindrical structure, which diameter is approximately 10,000 part of a human hair. For this discovery the researchers involved a few years, and during the research, they discovered that there are rays of sun in the concentrate of nanowires, which have small area in the crystal. The concentrated sunlight yields a high conversion efficiency, when it converted into electricity. While the nanowires, which based on solar cells, can rise limit of solar cells efficiency, the single nanowire can concentrate sunlight up to 15 times. This discovery will have an important impact on the future’s solar cell technology development.