Development of novel nanoscale devices requires unique functional nanomaterials. Furthermore, chemical design of different nanoparticles in one unit is a complex task, particularly the application of self-assembly J-aggregates, which can substantially advance the nanomaterial's properties due to resonant delocalization of excitons. Here, we have demonstrated for the first time formation of resonantly coherent J-aggregates on carbon nanotubes with highly efficient energy transfer from the aggregates to the nanotubes. All the energy of photons absorbed by the aggregates is conveyed to the nanotubes, completely quenching the J-band emission and photosensitizing the nanotubes. Overall, we discovered formation of two types of J-aggregates, where one type is related to self-assembly of cis-isomers on the nanotube surface and the second type is associated to self-organizing trans-isomers into free J-aggregates without the nanotubes. Importantly, the J-aggregates on carbon nanotubes with strong energy transfer peaks of photoluminescence in the near infrared range are of high interest for practical applications on biomedical imaging and nanoscale optoelectronic and nanophotonic devices.
Bibliographical noteThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry: Part C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.9b03341.
Funding: Royal Academy of Engineering/The Leverhulme Trust (Senior Research Fellowship, #LTSRF1617/13/57), EU FP Horizon-2020 Marie Skłodowska-Curie Individual Fellowship (FOC4SIP, #654733), and RISE (CARTHER, #690945), Jacob Blaustein Center for Scientific Cooperation.