3 documents found, page 1 of 1
Environmentally friendly conductive screen‐printable inks based on N‐Doped grap...
Franco, Miguel; Motealleh, Azadeh; Costa, Carlos M.; Hilliou, L.; Perinka, Nikola; Ribeiro, Clarisse; Viana, Júlio César; Costa, PedroThe development of polymer-based conductive inks has gained increasing interest in the areas of printed and molded electronics. Graphene-based materials are explored in this scope, reduced graphene oxide (rGO) being among the most used conductive filler components of the inks. Herein, rGO is doped with nitrogen to obtain N-rGO; the replacement of oxygen atoms by nitrogen ones increases the electrical conductivi...
Superstructural ordering in hexagonal CuInSe2 nanoparticles
Sousa, Viviana; Gonçalves, Bruna F.; Franco, Miguel; Ziouani, Yasmine; González-Ballesteros, Noelia; Cerqueira, M. F.; Yannello, Vincent; Kovnir, KirillChalcogenide semiconducting nanoparticles are promising building blocks for solution-processed fabrication of optoelectronic devices. In this work, we report a new large-scale colloidal synthesis of metastable CuInSe2 nanoparticles with hexagonal plate-like morphology. Powder X-ray diffraction analysis of the nanoparticles showed that the structure of the nanoparticles is not simple hexagonal wurtzite-type CuIn...
Probing of thermal transport in 50 nm thick PbTe nanocrystal films by time-doma...
Piotrowski, Marek; Franco, Miguel; Sousa, Viviana; Rodrigues, José; Deepak, Francis Leonard; Kakefuda, Yohei; Kawamoto, Naoyuki; Baba, TetsuyaBottom-up fabrication of thermoelectric (TE) materials from colloidal nanocrystal (NC) building blocks can substantially increase their TE efficiency, for example, by reducing lattice thermal conductivity. In this work, 10 nm spherical phase pure oleate-capped PbTe NCs with narrow size distribution were synthesized and employed to fabricate 50 nm thick films on insulating SiO2/Si substrates. The spin-coating, w...