An optical technique for fast and ultrasensitive detection of ammonia using magnetic nanofluids

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V. Mahendran and John Philip

We report a simple, in-expensive, portable, and ultrasensitive optical sensor for detection of ammonia in parts per million levels using magnetic nanofluids. The sensor produces visually perceptible color changes, in the presence of ammonia, due to the changes in the lattice periodicity of 1-dimen ... [Appl. Phys. Lett. 102, 063107 (2013)] published Tue Feb 12, 2013.



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