- About Us
- Career Center
- Nano-Social Network
- Nano Consulting
- My Account
November 5th, 2007
A team of scientists based in the UK and Germany have covalently bonded strings of porphyrin molecules on a gold surface - a step forward in the quest to develop nano-electronics.1
Other researchers have linked more than two molecules on surfaces as supramolecular structures before, but the patterns were held together only by non-covalent methods, such as hydrogen bonding and van der Waals interactions.
Non-covalent links are reversible and relatively fragile, says Stefan Hecht, chair of organic chemistry and functional materials at Humboldt University in Berlin and a member of the team. But covalent bonds are more stable and can transport electrical charge.
The team uses porphyrins, flat square-shaped molecules with four phenyl arms, one extending from each edge. The molecules are synthesized so that some or all the arms have a bromine atom at the end. The bromine atoms are removed by heating the molecules, leaving behind carbon radicals that combine through covalent carbon-carbon bonds, linking the porphyrin molecules.
|Related News Press|
Making new materials with micro-explosions: ANU media release: Scientists have made exotic new materials by creating laser-induced micro-explosions in silicon, the common computer chip material June 29th, 2015
Buckle up for fast ionic conduction June 16th, 2015
Exagan Raises €5.7 Million to Produce High-efficiency GaN-on-Silicon Power-switching Devices on 200mm Wafers: Leti-and-Soitec Spinout Focused on Becoming Leading European Source Of GaN Devices for Solar, Automotive, Telecoms and Infrastructure June 25th, 2015
Nanowires could be the LEDs of the future June 25th, 2015
Leti to Present Solutions to New Applications Using 3D Technologies at SEMICON West LetiDay Event, July 14: Leti Experts also Will Speak at TechXPOT Session on MEMS and STS Session on Lithography Cost-and-Productivity Issues Below 14nm June 22nd, 2015
Graphene heat-transfer riddle unraveled June 17th, 2015