Authors: C.J. Choi, K.D. Benkstein, P.H. Rogers, C.B. Montgomery and S. Semancik
Affilation: National Institute of Standards and Technology, United States
Pages: 131 - 133
Keywords: nanomaterials, biosensor, chemiresistor, photonic sensing, microelectromechanical systems
Contact events occurring between target species and surface sites on sensing materials initiate front-end interactions and subsequent transduction processes that can yield viable signals for target detection. By offering high surface-to-volume ratios, and specialized properties, nanomaterials can significantly amplify the sensing responses realized. This presentation illustrates such principles for nanomaterials that have been incorporated for photonic and electronic sensing devices. The materials described have been tailored for these two sensing modalities to attain: 1) plasmonic enhancement (for surface-enhanced Raman spectroscopy - SERS, and localized surface plasmon resonance - LSPR), and 2) beneficial sensitivity in the electrical transport characteristics of chemiresistors, upon target molecule/species adsorption. The goal of our research is to enable tunable, high-performance chemical/biochemical sensing (in the gas phase and solution phase) on replaceable, low-cost sensing device platforms. We emphasize not only the benefits associated with fundamental nanoscale phenomena, but also the importance of employing newly developed methods to effectively incorporate the nanostructured materials with functional substrates.
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