Browsing by Author "Gethin, D.T."

Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    Patterning of Antibodies Using Flexographic Printing
    (ACS, 2012-06-26) Phillips, Christopher O.; Govindarajan, S.; Hamblyn, Simon M.; Conlan, R.S.; Gethin, D.T.; Claypole, T.C.
    Antibodies were patterned onto flexible plastic films using the flexographic printing process. An ink formulation was developed using high molecular weight polyvinyl alcohol in carbonate–bicarbonate buffer. In order to aid both antibody adhesion and the quality of definition in the printed features, a nitrocellulose coating was developed that was capable of being discretely patterned, thus increasing the signal-to-noise ratio of an antibody array. Printing antibody features such as dots, squares, text, and fine lines were reproduced effectively. Furthermore, this process could be easily adapted for printing of other biological materials, including, but not limited to, enzymes, DNA, proteins, aptamers, and cells.
  • No Thumbnail Available
    ItemMetadata only
    Ultra-thin flexible screen printed rechargeable polymer battery for wearable electronic applications
    (Elsevier, 2015-08-14) Tehrani, Zari; Korochkina, Tatyana; Govindarajan, S.; Thomas, D.J.; O'Mahony, J.; Kettle, J; Claypole, T.C.; Gethin, D.T.
    This research has demonstrated how an ultra-thin rechargeable battery technology has been fabricated using screen printing technology. The screen printing process enabled the sequential deposition of current collector, electrode and separator/electrolyte materials onto a polyethylene terephthalate (PET) substrate in order to form both flexible and rechargeable electrodes for a battery application. The anode and cathode fabricated were based on the conducting poly (3,4-ethylenedioxythiophen): poly (styrene sulfonate) (PEDOT: PSS) and polyethyleneimine (PEI) which were combined to form the electrodes. The difference in the oxidation level between the two electrodes produced an open circuit voltage of 0.60 V and displayed a practical specific capacity of 5.5 mAh g−1. The battery developed had an active surface area of 400 mm2 and a device thickness of 440 μm. The chemistry developed during this study displayed long-term cycling potential and proves the stability of the cells for continued usage. This technology has direct uses in future personal wearable electronic devices.