The development of simple, rapid, and inexpensive detection method for diagnostics and environmental monitoring is still needed in developing and undeveloped countries for sustainable development in public health [1]. Currently, paper devices including paper strip tests, paper-based assays, and paper-based microfluidics are attractive for portable point-of-measurement (POM) monitoring and on-site detection due to advantages which include low cost, portability, ease of use, high speed, and low reagent and sample consumption [2–4]. Furthermore, paper provides a high surface area/high optical contrast substrate for colorimetric detection. Paper devices are also suited for use by nontechnical personnel. Finally, paper devices are made from naturally abundant, biodegradable and inexpensive materials (i.e.,cellulose) [5,6].