2024-03-29T14:16:21Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1569682018-10-23T04:30:33Zcom_10261_46com_10261_3col_10261_299
DIGITAL.CSIC
author
Qiaoming, Zhang
author
Leonardi, Francesca
author
Casalini, Stefano
author
Mas Torrent, Marta
funder
European Research Council
funder
Centro de Investigación Biomédica en Red Bioingeniería, Biomateriales y Nanomedicina (España)
funder
Dirección General de Investigación Científica y Técnica, DGICT (España)
funder
Generalitat de Catalunya
funder
Ministerio de Economía y Competitividad (España)
funder
European Commission
2017-11-03T09:10:05Z
2017-11-03T09:10:05Z
2017-10-23
Advanced Functional Materials: 10.1002/adfm.201703899 (2017)
1616-301X
http://hdl.handle.net/10261/156968
10.1002/adfm.201703899
1616-3028
http://dx.doi.org/10.13039/501100000780http://dx.doi.org/10.13039/501100003329http://dx.doi.org/10.13039/501100002809http://dx.doi.org/10.13039/501100005053http://dx.doi.org/10.13039/501100000781http://dx.doi.org/10.13039/501100008737
Surface doping allows tuning the electronic structure of semiconductors at near-surface regime and is normally accomplished through the deposition of an ultrathin layer on top or below the host material. Surface doping is particularly appealing in organic field-effect transistors (OFETs) where charge transport takes place at the first monolayers close to the dielectric surface. However, due to fabrication restrictions that OFET architecture imparts, this is extremely challenging. Here, it is demonstrated that mercury cations, Hg2+, can be exploited to control doping levels at the top surface of a thin film of a p-type organic semiconductor blended with polystyrene. Electrolyte- or water-gated field-effect transistors, which have its conductive channel at the top surface of the organic thin film, turn out to be a powerful tool for monitoring the process. A positive shift of the threshold voltage is observed in the devices upon Hg2+ exposure. Remarkably, this interaction has been proved to be specific to Hg2+ with respect to other divalent cations and sensitive down to nanomolar concentrations. Hence, this work also opens new perspectives for employing organic electronic transducers in portable sensors for the detection of an extremely harmful water pollutant without the need of using specific receptors.
eng
openAccess
Hg2+ ions
Electrolyte-gated organic field-effect transistors
Redox reaction;
Solution shearing technique
Surface doping
Mercury-Mediated Organic Semiconductor Surface Doping Monitored by Electrolyte-Gated Field-Effect Transistors
artículo
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URL
https://digital.csic.es/bitstream/10261/156968/1/Qiao_AdvFunctMat-2017_postprint.pdf
File
MD5
ca366107bad130e5421549759a1f5195
1419321
application/pdf
Qiao_AdvFunctMat-2017_postprint.pdf