Well yes they do exist.  I was involved with a project that had thousands of
detectors on the head of a pin (actually at the end of a fiber-optic cable).
Check out Illumina.com for their current technology ... now focused on
DNA/RNA but fully capable of vapor phase detection.   There are a number of
companies that do this some using die production methods to create the
detector, some using ink-jet printers to place the detecting mixture.

Rich

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
Of William Chops Westfield
Sent: Tuesday, May 01, 2007 8:50 AM
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Nose Chips


On May 1, 2007, at 5:43 AM, David VanHorn wrote:

> so many of these start off with the phrase "is developing".

I think most of the ones I've seen have been research projects.
That is, a particular sensor for a particular gas/etc can be
(and are) manufactured, but the idea of using MEMS technology
to put a whole bunch of different sensors to detect different
things on a single "chip" is still just research.

BillW

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