Polyphosphonium-Based Ion Bipolar Junction Transistors
2014 (English)In: Biomicrofluidics, ISSN 1932-1058, Vol. 8, no 6, 064116- p.Article in journal (Refereed) Published
Advancements in the field of electronics during the past few decades have inspired the use of transistors in a diversity of research fields, including biology and medicine. However, signals in living organisms are not only carried by electrons, but also through fluxes of ions and biomolecules. Thus, in order to implement the transistor functionality to control biological signals, devices that can modulate currents of ions and biomolecules, i.e. ionic transistors and diodes, are needed. One successful approach for modulation of ionic currents is to use oppositely charged ion-selective membranes to form so called ion bipolar junction transistors (IBJTs). Unfortunately, overall IBJT device performance has been hindered due to the typical low mobility of ions, large geometries of the ion bipolar junction materials, and the possibility of electric field enhanced (EFE) water dissociation in the junction. Here, we introduce a novel polyphosphonium-based anion-selective material into npn-type IBJTs. The new material does not show EFE water dissociation and therefore allows for a reduction of junction length down to 2 μm, which significantly improves the switching performance of the ion transistor to 2 s. The presented improvement in speed as well the simplified design will be useful for future development of advanced iontronic circuits employing IBJTs, for example addressable drug-delivery devices.
Place, publisher, year, edition, pages
2014. Vol. 8, no 6, 064116- p.
WATER DISSOCIATION; NANOFLUIDIC DIODE; MEMBRANES; CIRCUITS
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:liu:diva-110400DOI: 10.1063/1.4902909ISI: 000347160400018OAI: oai:DiVA.org:liu-110400DiVA: diva2:745410
This research was financed by VINNOVA (OBOE Miljo and AFM), the Swedish Research Council, and the Onnesjo foundation.2014-09-102014-09-102015-05-06Bibliographically approved