Chad Mirkin is developing a new DNA detection method. The Northwestern University professor and director of the school's Institute of NanoTechnology pairs microelectrodes and nanoprobes for detecting Anthrax, small pox, and other biohazards. He asserts that nanotechnology offers better results in all categories of detection, including sensitivity, selectivity, cost, ease of use, and speed. The new detection method eliminates the need to heat the gene chip. Mirkin says that companies in the gene chip technology business currently use a polymerase chain reaction (PCR) for detection. Gene chips are read using a confocal microscope, a complex instrument costing more than $60,000. Mirkin's electrical DNA detection method eliminates the PCR. It also allows testing of thousands of biological targets on a single chip. Various DNA tests are placed on a glass slide, each made up of single strands of synthesized DNA that bind with targeted DNA. The bound strands are placed between a pair of electrodes, one test for each pair. When the slide is placed in a solution containing the target, perfect and partial matches bind to gold probes. The probe accumulations are then amplified using modified photographic developing solution. Each gold nanoparticle becomes covered with silver and grows in size, closing the gap between the electrodes and thus carrying a current. For more information, go to www.northwestern.edu.
Researchers at the University of Maryland have achieved a first in lithium-ion battery science: the development of a successful lithium-based battery using one material for all three core components of a battery -- anode, cathode, and electrolyte.
The online Bar Steel Fatigue Database for automotive design engineers has been updated for the fifth time and now contains 134 iterations, or grade/process combinations. It provides better predictability for designing parts with long-term reliability and durability.
FPGAs use programmable fabric to create custom logic, but this flexibility comes at a cost -- usually around 10 times more silicon real estate and 10 times the power dissipation. Can we really claim any FPGA is low power?
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.