...scientists have developed a way to use light to grab and move minuscule particles on a microchip. The research could lead to fine-grained biological sensors and other precisely built nanoscale devices.
The work by Massachusetts Institute of Technology researchers could extend the possibilities for "optical tweezers" _ super-focused beams of light that have been used for years to study and manipulate tiny biological structures or even individual atoms.
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Lang and Appleyard proved their technique by getting 16 live E. coli cells to spell out "MIT" on a chip. The long-term potential is more practical: Lang envisions using the system to cram high-resolution sensors in very small spaces _ for disease detectors, for example _ and to connect silicon-based electronics to living tissues and other "biological interfaces."
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