A unique colour X-ray camera goes into operation at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) today. With this camera, it will be possible for the researchers at the Helmholtz Institute Freiberg for Resource Technology (HIF), a part of the HZDR, to determine within a very short period ... more
Video reveals wave character of particlesWave properties of individual heavy molecules can also be observed experimentally
Every individual molecule fluoresces and becomes part of the interference pattern. Figures a through e show the states after 0, 2, 20, 40 and 90 minutes, respectively.
Quantum theory describes the world of atoms very precisely. Still, it defies our macroscopic conception of everyday's world due to its many anti-intuitive predictions. The wave-particle dualism probably is the best known example and means that matter may spread and interfere like waves. Now, an international team of researchers has recorded the interference process of individual molecules. The recordings were published by the journal Nature Nanotechnology online.
"Seeing how the interference pattern develops with every light spot, molecule after molecule, and how a basic principle of quantum mechanics is visualized enhances our understanding of the atomic world," explains Professor Marcel Mayor, who conducts research and teaches at Karlsruhe Institute of Technology and the University of Basel.
For the experiment performed in cooperation with colleagues from the universities of Vienna and Tel Aviv, Mayor synthesized fluorescent phtalocyanin molecules having an atomic mass of up to 1298 AMU and consisting of up to 114 atoms. Then, the molecules were accelerated, sent as a slow beam through an optical grating, and deposited on the entrance vacuum window, where they were excited to fluoresce by a laser. For a period of 90 minutes, a fluorescence microscope observed the build-up of the interference pattern. Its setup has a sufficient sensitivity to exactly locate every individual molecule on the window with a precision of about 10 nanometers.
In the future, the setup might be used to study the so-called van-der-Waals interaction between molecules in the beam and those in the grating, which is reflected rather sensitively by the interference pattern. Researchers are also interested in finding out from which size and under which conditions particles behave quantum mechanically or classically, i.e. in the so-called decoherence. These findings may be the basis for novel applications, such as quantum computers. "But the many insights given by this experiment into the quantum world and its boundaries already are of high value," Mayor agrees with many experts, among others Bum Suk Zhao and Wieland Schöllkopf from the Fritz Haber Institute, Berlin, who evaluate the experiment in the accompanying comment article in the same journal.
"Real-time single-molecule imaging of quantum interference", T. Juffmann et al., Nature Nanotechnology
- Universität Basel
- Universität Wien
- Tel Aviv University
While residual medications don’t belong in the water, trace metals from industrial process waters handled by the recycling industry are, in contrast, valuable resources. Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have developed a simple color sensor principle which facili ... more
Scientists using computational techniques to look at processes in DNA have employed a surface-hopping approach to predict the degree of charge localisation across nucleobases. The technique should allow more accurate modeling of the effects of charge transfer within the molecule. Different ... more
The world’s smallest tunnels have a width of a few nanometers only. Researchers from Karlsruhe Institute of Technology (KIT) and Rice University, USA, have dug such tunnels into graphite samples. This will allow structuring of the interior of materials through self-organization in the nanom ... more
In chemical industry, heterogeneous catalysis is of crucial importance to the manufacture of basic or fine chemicals, in catalytic converters of exhaust gas, or for the chemical storage of solar energy. Scientists of Karlsruhe Institute of Technology (KIT) and Ruhr-Universität Bochum (RUB) ... more
An international team of physicists has succeeded in mapping the condensation of individual atoms, or rather their transition from a gaseous state to another state, using a new method. Led by the Swiss Nanoscience Institute and the Department of Physics at the University of Basel, the team ... more
Biological membranes are like a guarded border. They separate the cell from the environment and at the same time control the import and export of molecules. The nuclear membrane can be crossed via many tiny pores. Scientists at the Biozentrum and the Swiss Nanoscience Institute at the Unive ... more
In collaboration with colleagues from Berlin and Madrid, researchers at the Department of Physics at the University of Basel have pulled up isolated molecular chains from a gold surface, using the tip of an atomic force microscope (AFM). The observed signal provides insight into the detachm ... more
- 1Schleicher & Schuell has been purchased by Whatman plc
- 2Mummified bodies reveal how tuberculosis ravaged the heart of 18th century Europe
- 3Philips enters into collaboration with Janssen to develop new handheld blood test
- 4Pall Corporation Acquires BioSMB Technology from Tarpon Biosystems
- 5Goodbye to sunburn thanks to Queen's sunburn indicator
- 6Inspecting water quality with Raman spectroscopy
- 7Rapid and efficient DNA chip technology for testing 14 major types of food borne pathogens
- 8Sharper nanoscopy
- 9Extensive Proteomics Research Strengthens the Uptake for Protein Purification Kits in Europe
- 10Mettler-Toledo's TDL Analyzers Receive Award from Frost & Sullivan for Competitive Strategy Innovation & Leadership
- DNA blood test detects lung cancer mutations
- Mettler-Toledo's TDL Analyzers Receive Award from Frost & Sullivan for Competitive Strategy Innovation & Leadership
- Nano-Beaker Offers Insight Into the Condensation of Atoms
- Damaged DNA amplified
- Roche acquires Bina Technologies and enters the genomic informatics market