How to Delete (or Archive) Attachments in Apple Mail and Free Up Disk Space [Mac OS X]

Apple Mail is a pretty decent email client, but it saves all your attachments in a folder deep within your user library, sucking up disk space without ever really letting you know. Fortunately, this is an easy problem to solve if you know where to look. Sort of, anyway. Apple made removing your attachments very simple, but if you want to actually save and archive them it can be a bit more complicated—especially if you're running Lion. But not to worry, we'll walk you through the whole thing. The process can be a little tedious, but it's not too tough. More »


Nanorods made of fullerenes improve performance of polymer solar cells

The biggest obstacle to making use of solar energy has been the excessively high price of solar cells made of inorganic semiconductors. In contrast, solar cells based on semiconducting polymers are affordable, light, thin, and flexible - but their performance has been lacking. A team in Taiwan has now developed a new approach that uses fullerene nanorods to significantly increase the effectiveness of polymer-based solar cells.

First demonstration of a memristive nanodevice based on protein

Memristors - the fourth fundamental two-terminal circuit element following the resistor, the capacitor, and the inductor - have attracted intensive attention owing to their potential applications for instance in nanoelectronic memories, computer logic, or neuromorphic computer architectures. Scientists have been able to show that various materials such as metal oxides, chalcogenides, amorphous silicon, carbon, and polymer-nanoparticle composite materials exhibit memristive phenomena. One unanswered question so far has been whether natural biomaterials like proteins can be used for the fabrication of solid-state devices with transport junctions. Researchers in Singapore have now demonstrated that proteins indeed can be used to fabricate bipolar memristive nanodevices.

Gold nuggets for biotechnology: Introducing laser-generated nanoparticle conjugates

Bio-conjugated nanoparticles are important analytical tools with emerging biological and medical applications. Especially gold nanoparticles are of increasing interest for nanobiotechnology research and applications because of their high acceptance level in living systems and the fact that they are fairly easily conjugated with functional molecules. Ultrashort pulsed laser ablation represents a powerful tool for the generation of pure gold nanoparticles avoiding chemical precursors, reducing agents, and stabilizing ligands. The bare surface of the charged nanoparticles makes them highly available for functionalization and as a result especially interesting for biomedical applications. Starting today, such conjugates are available commercially for the first time.

A*STAR Institute of Microelectronics and University of Washington to develop silicon photonics

A*STAR Institute of Microelectronics and the University of Washington announce that they will join forces to provide shared Silicon Photonics processes as part of the Optoelectronics Systems Integration in Silicon programme (OpSIS). This will help the research and development community significantly reduce the fabrication cost of silicon photonics integrated circuits.