@misc{10481/101777,
year = {2015},
url = {https://hdl.handle.net/10481/101777},
abstract = {We quantified the electric permittivity of single bacterial cells at microwave frequencies and nanoscale spatial resolution by means of near-field scanning microwave microscopy. To this end, calibrated complex admittance images have been obtained at ∼19 GHz and analyzed with a methodology that removes the nonlocal topographic cross-talk contributions and thus provides quantifiable intrinsic dielectric images of the bacterial cells. Results for single Escherichia coli cells provide a relative electric permittivity of ∼4 in dry conditions and ∼20 in humid conditions, with no significant loss contributions. Present findings, together with the ability of microwaves to penetrate the cell membrane, open an important avenue in the microwave label-free imaging of single cells with nanoscale spatial resolution.},
keywords = {Scanning Microwave Microscopy},
keywords = {Single Bacteria},
keywords = {Electric Permittivity},
keywords = {Topographic Cross-Talk},
title = {Nanoscale electric permittivity of single bacterial cells at gigahertz frequencies by scanning microwave microscopy},
doi = {10.1021/acsnano.5b04279},
author = {Biagi, Maria Chiara and Fabregas, Rene and Gramse, Georg and Van Der Hofstadt, Marc and Juarez, Antonio and Kienberger, Ferry and Fumagalli, Laura and Gomila, Gabriel},
}