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Archive for the ‘ethics’ category: Page 82

Feb 9, 2009

Nanotech Development: You Can’t Please All of the People, All of the Time

Posted by in categories: ethics, nanotechnology, policy

Abstract

What counts as rational development and commercialization of a new technology—especially something as potentially wonderful (and dangerous) as nanotechnology? A recent newsletter of the EU nanomaterials characterization group NanoCharM got me thinking about this question. Several authors in this newsletter advocated, by a variety of expressions, a rational course of action. And I’ve heard similar rhetoric from other camps in the several nanoscience and nanoengineering fields.

We need a sound way of characterizing nanomaterials, and then an account of their fate and transport, and their novel properties. We need to understand the bioactivity of nanoparticles, and their effect in the environments where they may end up. We need to know what kinds of nanoparticles occur naturally, which are incidental to other engineering processes, and which we can engineer de novo to solve the world’s problems—and to fill some portion of the world’s bank accounts. We need life-cycle analyses, and toxicity and exposure studies, and cost-benefit analyses. It’s just the rational way to proceed. Well who could argue with that?

Article

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Jan 16, 2009

Could Spider Silk Save Your Life?

Posted by in categories: ethics, military, nanotechnology

Sometimes what may save your life can come from the most unsuspecting places. Then sometimes, what can save your life in one circumstance may be highly risky, or at least technologically premature, in another. Lifeboat Foundation is about making those distinctions regarding emerging technologies and knowing the difference.

MIT scientists from the Institute for Soldier Nanotechnologies announced in January 2007 they had reached an elusive engineering milestone. They had successfully created a synthetic material with the same properties of spider silk.1 The combination of elasticity and strength of spider silk has been a long sought after target for synthetic manufacturing for improving materials as diverse as packaging, clothing, and medical devices. Using tiny clay disks approximately one billionth of a meter, these nanocrystals combined with rubber polymer create the stretchy but strong polymer nanocomposite.

The use of nanocomposites for the production of packaging materials or clothing seems to be a relatively safe and non-controversial because materials remain outside the body. The United States military has already indicated, according to one source, their desire to use the material for military uniforms and to improve packaging for those lovely-tasting MREs.2 In fact, this is why the Army-funded Institute for Soldier Nanotechnology is supporting the research—to develop pliable but tough body armor for soldiers in combat. Moreover, imagine, for example, a garbage bag that could hold an anvil without breaking. The commercial applications may be endless—but there should be real concern regarding the ways in which these materials might be introduced into human bodies.

Although this synthetic spider silk may conjure up images of one day being able to have the capabilities of Peter Parker or unbreakable, super-strength bones, there are some real concerns regarding the potential applications of this technology, particularly for medical purposes. Some have argued that polymer nanocomposite materials could be used as the mother of all Band-Aids or nearly indestructible stents. For hundreds of years, spider silks have been thought to have great potential for wound covering. In general, nanocomposite materials have been heralded for medical applications as diverse as bone grafts to antimicrobial surfaces for medical instruments.

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