Solution-Based Phototransformation of C-60 Nanorods: Towards Improved Electronic Devices
2013 (English)In: Particle & particle systems characterization, ISSN 0934-0866, E-ISSN 1521-4117, Vol. 30, no 8, 715-720 p.Article in journal (Refereed) Published
A modified liquid-liquid interface precipitation synthesis of C-60 nanorods, effects and opportunities following an in situ photochemical transformation in the liquid state, and an electronic characterization using a field-effect transistor (FET) geometry are reported. The nanorods feature a high aspect ratio of approximate to 10(3) and a notably small average diameter of 172 nm. Interestingly, it is found that a decreased nanorod diameter appears to correlate with distinctly improved electronic properties, and an average electron mobility of 0.30 cm(2) V-1 s(-1), as measured in a FET geometry, is reported for as-grown nanorods, with the peak value being an impressive 1.0 cm(2) V-1 s(-1). A photoexposure using green laser light ( = 532 nm) is demonstrated to result in the formation of a polymer-C-60 shell encapsulating a monomer-C-60 bulk; such photo-transformed nanorods exhibit an electron mobility of 4.7 x 10(-3) cm(2) V-1 s(-1). It is notable that the utilized FET geometry only probes the polymer-C-60 nanorod surface shell, and that the monomer-C-60 bulk is anticipated to exhibit a higher mobility. Importantly, photoexposed nanorods can be conveniently processed as a stabile dispersion in common hydrophobic solvents, and this finding is attributed to the insoluble character of the polymer-C-60 shell.
Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2013. Vol. 30, no 8, 715-720 p.
C-60 nanorods, nanowhiskers, field-effect transistors, liquid-liquid-interface precipitation, photopolymerization, Raman spectroscopy
Physical Chemistry Nano Technology
IdentifiersURN: urn:nbn:se:umu:diva-84136DOI: 10.1002/ppsc.201300016ISI: 000327250400012OAI: oai:DiVA.org:umu-84136DiVA: diva2:680148