Jing Li, a scientist in California's NASA Ames Research Center, has
designed a smartphone plug-in device that could sense chemicals from the
environment. Current prototype of the device works with the iPhone, and
plugs into the handset's bottom connector. The device can detect
chemicals in ambient air such as methane, ammonia and chlorine gas. It's
designed to connect to a network through WiFi or a regular phone
connection in order to send alerts to other phones also equipped with
the device. According to Li, a previous prototype of the device was the
size of a soda can - this iteration, however, is touted as one of the
smallest complete sensing-device in the world.
The device contains a silicon-based sensing chip with 64 nanosensors. Li and colleagues had to work on making a chip that can contain all those nanosensors and yet is compact, high-speed, low-power and low-cost.
The device contains a silicon-based sensing chip with 64 nanosensors. Li and colleagues had to work on making a chip that can contain all those nanosensors and yet is compact, high-speed, low-power and low-cost.
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