abstract
Graphene-based materials are elective materials for a number of technologies due to their unique properties. Also, semiconductor nanocrystals have been extensively explored due to their size-dependent properties that make them useful for several applications. By coupling both types of materials, new applications are envisaged that explore the synergistic properties in such hybrid nanostructures. This research reports a general wet chemistry method to prepare graphene oxide (GO) sheets decorated with nanophases of semiconductor metal sulfides. This method allows the in situ growth of metal sulfides onto GO by using metal dialkyldithiocarbamate complexes as single-molecule precursors. In particular, the role of GO as heterogeneous substrate for the growth of semiconductor nanocrystals was investigated by using Raman spectroscopic and imaging methods. The method was further extended to other graphene-based materials, which are easily prepared in a larger scale, such as exfoliated graphite oxide (EGO).
keywords
SELECTIVE ORGANIC TRANSFORMATION; VISIBLE-LIGHT PHOTOCATALYST; SINGLE-MOLECULE PRECURSORS; SOLVOTHERMAL SYNTHESIS; PHOTOVOLTAIC PROPERTIES; CDS NANOCOMPOSITES; RAMAN-SPECTROSCOPY; MATERIALS SCIENCE; ONE-STEP; COMPOSITE
subject category
Science & Technology - Other Topics; Materials Science
authors
Lopes, JL; Estrada, AC; Fateixa, S; Ferro, M; Trindade, T
our authors
Ana Cristina Estrada
Junior Researcher
Joana Lúcia Marto dos Santos Lopes
PhD Student
Marta Ascenção Carmona Ferro
Laboratory Officer
Sara Fateixa
Junior Researcher
Tito Trindade
Full professoracknowledgements
This research was funded through the FCT Project UTAP-ICDT/CTMNAN/0025/2014 and project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. Joana L. Lopes, Ana C. Estrada and Sara Fateixa thank FCT for, respectively, doctoral grant (SFRH/BD/126241/2016), post-doctoral grant (SFRH/BPD/86780/2012) and (SFRH/BPD/93547/2013).