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Microscopic 'Hands' For Building Tomorrow’s Machines

Date:
January 16, 2009
Source:
American Chemical Society
Summary:
In a finding straight out of science fiction, chemical and biomolecular engineers in Maryland are describing development of microscopic, chemically triggered robotic "hands" that can pick up and move small objects. They could be used in laboratory-on-a-chip applications, reconfigurable microfluidic systems, and micromanufacturing, the researchers say.

Engineers have developed tiny, robotic hands -- also known as microgrippers (above) -- that could be used in lab-on-a-chip applications.
Credit: American Chemical Society

In a finding straight out of science fiction, chemical and biomolecular engineers in Maryland are describing development of microscopic, chemically triggered robotic “hands” that can pick up and move small objects. They could be used in laboratory-on-a-chip applications, reconfigurable microfluidic systems, and micromanufacturing, the researchers say. A report on their so-called “microgrippers” is published in the Journal of the American Chemical Society.

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In the new study, David Gracias and colleagues note that researchers have long sought to develop chemically triggered microscopic devices that can manipulate small objects with precision. Chemical actuation occurs in biological machinery and enables autonomous function in nature with high specificity and selectivity. Although other scientists have made experimental “grippers” in the lab, these devices generally require the use of batteries and wiring, making them hard to miniaturize and maneuver in small spaces and convoluted conduits.

The researchers describe development of tiny metallic microgrippers shaped like a hand that work without electricity. The grippers are about 0.03 inches wide when open — smaller than the diameter of a grain of sand and made from a gold-coated nickel “palm” joined by six pointy metallic “fingers.” The addition of certain chemicals triggers the hands to open or close. In laboratory studies, the scientists demonstrated that the grippers could grasp and release tiny pipes and glass beads and transport these objects to distant locations with the aid of a magnet, showcasing their potential for pick-and-place operations that are ubiquitous in manufacturing, they say.

They also say that this demonstration is also a step toward the development of Micro Chemo Mechanical Systems (MCMS) in contrast to the already well established field of Micro Electro Mechanical Systems (MEMS); the main difference being that the tools are triggered by chemistry as opposed to electricity.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Randhawa et al. Pick-and-Place Using Chemically Actuated Microgrippers. Journal of the American Chemical Society, 2008; 130 (51): 17238 DOI: 10.1021/ja806961p

Cite This Page:

American Chemical Society. "Microscopic 'Hands' For Building Tomorrow’s Machines." ScienceDaily. ScienceDaily, 16 January 2009. <www.sciencedaily.com/releases/2009/01/090114210651.htm>.
American Chemical Society. (2009, January 16). Microscopic 'Hands' For Building Tomorrow’s Machines. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2009/01/090114210651.htm
American Chemical Society. "Microscopic 'Hands' For Building Tomorrow’s Machines." ScienceDaily. www.sciencedaily.com/releases/2009/01/090114210651.htm (accessed November 28, 2014).

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