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Conjugated polyelectrolyte nano field emission adlayers


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Publication Date: 2016-05-09

Journal Title: Nanoscale Horizons

Publisher: Royal Society of Chemistry

Language: English

Type: Article

This Version: VoR

Metadata: Show full item record

Citation: Cole, M. T., Parmee, R. J., Kumar, A., Collins, C. M., Kang, M. H., Xiao, J., Cepek, C., et al. (2016). Conjugated polyelectrolyte nano field emission adlayers. Nanoscale Horizons https://doi.org/10.1039/c6nh00071a

Description: This is the final version of the article. It first appeared from the Royal Society of Chemistry via http://dx.doi.org/10.1039/c6nh00071a

Abstract: Here we report on a straightforward and rapid means of enhancing the field electron emission performance of nascent vertically aligned multi-walled carbon nanotubes by introducing a polar zwitterionic conjugated polyelectrolyte adlayer at the vacuum–emitter interface. We attribute the observed 66% decrease in turn-on electric field to the augmented emitter micro-morphology and shifted surface band structure. The composite emitters can be optically modulated by exploiting the absorption cross-section of the solution cast adlayer, which increases the local carrier concentration which broadens the effective electrostatic shape of the emitter during optical excitation. Assessment via scanning anode field emission microscopy reveals a 25% improvement in DC time stability, a significant reduction in long-term hysteresis shift, and a threefold increase in bandwidth during pulsed mode operation.

Relationships: Is supplemented by: https://doi.org/10.1039/c6nh00071a

Sponsorship: Oppenheimer Trust

Engineering and Physical Sciences Research Council Cambridge Nano Doctoral Training Centre (Grant ID: EP/L015978/1)

Engineering and Physical Sciences Research Council (Impact Acceleration Account)

Innovate UK (Advanced Materials grant)

Embargo Lift Date: 2100-01-01

Identifiers:

External DOI: https://doi.org/10.1039/c6nh00071a

This record's URL: https://www.repository.cam.ac.uk/handle/1810/256219



Rights: Attribution 4.0 International

Licence URL: http://creativecommons.org/licenses/by/4.0/





Author: Cole, M. T.Parmee, R. J.Kumar, A.Collins, C. M.Kang, M. H.Xiao, J.Cepek, C.Yuan, X.Milne, W. I.Show moreShow less

Source: https://www.repository.cam.ac.uk/handle/1810/256219



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