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Wissenschaft News
- Magnetism's subatomic roots: Study of high-tech materials helps explain everyday phenomenon
- Novel nanotechnology collaboration leads to breakthrough in cancer research
- Helping corn-based plastics take more heat
- Chemists, engineers achieve world record with high-speed graphene transistors
- Experiment records ultrafast chemical reaction with vibrational echoes
- Chemists develop simple technique to visualize atomic-scale structures
- The perfect nanocube: Precise control of size, shape and composition
- Edible nanostructures: Compounds made from renewable materials could be used for gas storage, food technologies
- Breaking up phosphorus with ultraviolet light may offer a safer, simpler way to build many...
- Strain-gating piezotronics: New class of piezoelectric logic devices created using zinc oxide nanowires
- 'Smart materials' process promises to revolutionize manufacturing of medical devices, other products
- Metal-mining bacteria are green chemists
- Chemists discover method to create high-value chemicals from biomass
- Listening to ancient colors: New technique may help restorers identify decades-old pigments
- New material may reveal inner workings of hi-temp superconductors
- High-speed filter uses electrified nanostructures to purify water at low cost
- Off-the-shelf dyes improve solar cells
- IceCube neutrino observatory nears completion
- Silicon oxide circuits break barrier: Nanocrystal conductors could lead to massive, robust 3-D storage
- Micro rheometer is latest 'lab on a chip' device
- Yikes! Sensor measures yoctonewton forces fast
- Mimicking fish and tailoring radar to warn of bridge peril
- Tiny rulers to measure nanoscale structures
- Stretched polymer snaps back smaller than it started
- Tiny logo demonstrates advanced display technology using nano-thin metal sheets
- Secrets of the gecko foot help robot climb
- Medicine reaches the target with the help of magnets
- Prediction of intrinsic magnetism at silicon surfaces could lead to single-spin magnetoelectronics
- 'Greening' your flat screen TV: Engineers develop an organic LED light source for home electronics,...
- New 'light switch' chloride binder developed
- Tofu ingredient yields formaldehyde-free glue for plywood and other wood products
- 'Dry water' could make a big splash commercially, help fight global warming
- Cement, the glue that holds oyster families together
- Trouble with sputter? Blame giant nanoparticles
- Microneedle, quantum dot study opens door to new clinical cancer tools
- Glorious gadolinium gives flash memory a future
- Half-a-loaf method can improve magnetic memories
- 'Spintronics' breakthrough holds promise for next-generation computers
- New generation of power: Hi-tech rechargeable batteries developed for military
- Scientists help explain graphene mystery
- How to count the messenger out: Mapping the structure of protonated water clusters
- New atom-scale products on horizon: Breakthrough discovery enables nanoscale manipulation of piezoelectric effect
- Powerful new way to control magnetism: Colossal magnetoelectricity points the way to ultra-dense data storage
- Cluster bomb for cancer care: Nano-vehicle delivers chemotherapy treatments on target
- Making vehicles safer
- Titanium coating with protein 'flower bouquet' nanoclusters strengthens implant attachment
- Better way to grow stem cells developed
- Visualizing viruses: New research pinpoints tiny invaders
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| Dienstag, 01. Juli 2008 um 00:00 | ||||||||||
JPAGE_CURRENT_OF_TOTAL DefinitionUnter einem Halbleiter versteht man einen Festkörper, dessen Valenz- und Leitungsband zwar nicht überlappen, aber doch auch nicht so weit voneinander entfernt sind wie bei Nichtleitern. Der Energieunterschied zwischen beiden Bändern beträgt typisch weniger als 3 eV.
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