P1.8.2 Printable Paper-Based Polymer Sensors for Detection of Vapor Phase Alcohols

John S. Mitchell, Richard Oliver & Bob Jordan
Porous sol-gel polymer thin films doped with gold nanoparticles are coated onto paper substrates to serve as lowcost plasmonic gas sensors. Once the polymer is set, it can swell in response to the presence of organic volatiles, thus altering the inter-particle distance between nanoparticles and blueshifting the plasmon resonance peak. A solgel formulation is selected to achieve appropriate porosity and hydrophobicity for detection of the short chain alcohols methanol and ethanol. This polymer matrix surrounds...