Oxygen piles up: the four atom form might make good fuel.
Scientists have detected a molecule they’ve been looking for since the 1920s.
Scientists in Italy have discovered a new form of oxygen1. In addition to the two well-known forms - ozone and the oxygen molecules in air - there is a third, they say, in which oxygen atoms are grouped in fours.
The oxygen molecules that we breathe (denoted O2) consist of two oxygen atoms. This, the most stable form of oxygen, makes up about one-fifth of air. Ozone is more reactive and comprises three oxygen atoms (O3). It is formed in the atmosphere in small quantities when sunlight splits O2 into its component atoms, which then recombine.
To prove conclusively that they had identified O4, Cacace’s team used mass spectrometry. This technique separates a mixture of electrically charged molecules (ions) according to their mass and charge.
The researchers combined O2 molecules and positively charged O2 ions to produce O4 ions, which are identifiable by being four times as massive as oxygen atoms. They then added an electron to each O4 ion, transforming it to a neutral molecule.
After a short interval, the team stripped an electron from each O4 molecule so that they could detect them again as ions (neutral molecules are invisible to mass spectrometry). They reasoned that if the neutral molecules were sufficiently stable, they would show up when re-ionized - as indeed they did.
What O4 looks like is still a mystery. Earlier theoretical calculations suggested two possibilities: a rhombus-shaped molecule with an atom at each corner, or a triangle of atoms with the fourth in the centre. But neither of these options fits the researchers’ results very well.
Instead, they think that O4 is probably composed of two dumbbell-like O2 molecules that are loosely bound together.
PHILIP BALL | © Nature News Service
Building a brain, cell by cell: Researchers make a mini neuron network (of two)
23.05.2018 | Institute of Industrial Science, The University of Tokyo
Research reveals how order first appears in liquid crystals
23.05.2018 | Brown University
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
24.05.2018 | Power and Electrical Engineering
23.05.2018 | Life Sciences
23.05.2018 | Life Sciences