In this report, we take advantage of a commercially successful technology recently embedded in modern smartphones�Near Field Communication (NFC)�for wireless, non-line-of-sight chemical sensing. To create chemical and physical sensing platforms that have the characteristics of being simple and inexpensive, yet sensitive and quantitative, requires the design of new materials and devices. An enabling approach would be the development of sensing materials and devices that are modular (i.e., readily modified for specific applications), wirelessly addressable, and easily used and interpreted by individuals with no prior technical training. In pursuit of this objective, we have developed a smartphone-enabled sensing platform that utilizes commercially available NFC tags modified with SWCNT-based chemiresistors.The capability of the smartphone sensing system is highlighted by detecting vapors of ammonia, hydrogen peroxide, and cyclohexanone. Due to the increasingly ubiquitous use of smartphones and smart devices, we envision that this platform will provide a foundation for distributed chemical sensing applications wherein the acquisition of chemical information was previously cost-prohibitive. By correlating chemical exposure data with the location of the end-user, information collected by smartphones may someday prove complementary to traditional chemical exposure monitoring techniques.

Wireless detection of gases and vapors with a smartphone via Near Field Communication (NFC)

248th National Meeting (2014)

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