High performance sensing of nitrogen oxides by surface plasmon resonance excited fluorescence of dye-doped deoxyribonucleic acid thin films

Nagamura, Toshihiko; Yamamoto, Misato; Terasawa, Michiyo; Shiratori, Koji
July 2003
Applied Physics Letters;7/28/2003, Vol. 83 Issue 4, p803
Academic Journal
Highly sensitive, fast responsive, and highly reversible sensing of nitrogen dioxide, nitric oxide, and nitrous oxide at a ppm-to-sub-ppm level has been achieved by fluorescence measurements upon excitation of various dye-doped deoxyribonucleic acid (DNA) or hydrophobic DNA thin films spincoated on a thin silver film by electric-field-enhanced evanescent light at surface plasmon resonance. The response time, sensitivity, or selectivity was controlled by combination of dyes and matrices. The present result will make a great many contributions to environmental and medical applications.


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