Dopamine coated Fe3O4 nanoparticles as enzyme mimics for the sensitive detection of bacteria

作者：Mumtaz Shazia; Wang Sheng; Hussain Syed Zajif^*; Abdullah Muhammad; Huma Zille; Iqbal Zafar; Creran Brian; Rotello Vincent M^*; Hussain Irshad^*

来源：Chemical communications, 2017, 53(91): 12306-12308.

DOI：10.1039/c7cc07149c

We report a simple and economical colorimetric bacterial sensing strategy with catalytic amplification using dopamine-capped iron oxide (Dop-Fe3O4) nanoparticles. These nanoparticles catalyse the oxidation of a chromogenic substrate in the presence of H2O2 into a green colored product. The catalytic activity of the nanoparticles is inhibited in the presence of bacteria, providing naked eye detection of bacteria at 10(4) cfu mL(-1) and by spectrophotometric detection down to 10(2) cfu mL(-1).

• 出版日期2017-11-25