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Tuneable pressure effects in graphene oxide layers.

Authors :
Sekimoto Y
Ohtani R
Nakamura M
Koinuma M
Lindoy LF
Hayami S
Source :
Scientific reports [Sci Rep] 2017 Sep 22; Vol. 7 (1), pp. 12159. Date of Electronic Publication: 2017 Sep 22.
Publication Year :
2017

Abstract

Tuneable pressure effects associated with changing interlayer distances in two-dimensional graphene oxide (GO)/reduced GO (rGO) layers are demonstrated through monitoring the changes in the spin-crossover (SCO) temperature (T <subscript>1/2</subscript> ) of [Fe(Htrz) <subscript>2</subscript> (trz)](BF <subscript>4</subscript> ) nanoparticles (NPs) incorporated in the interlayer spaces of the GO/rGO layers. The interlayer separation along the GO to GO/rGO-NP composites to rGO series decreases smoothly from 9.00 Å (for GO) to 3.50 Å (for rGO) as the temperature employed for the thermal reduction treatments of the GO-NP composites is increased. At the same time, T <subscript>1/2</subscript> increases from 351 K to 362 K along the series. This T <subscript>1/2</subscript> increment of 11 K corresponds to that observed for pristine [Fe(Htrz) <subscript>2</subscript> (trz)](BF <subscript>4</subscript> ) NPs under a hydrostatic pressure of 38 MPa. The influence of the stacked layer structures on the pseudo-pressure effects has been further probed by investigating the differences in T <subscript>1/2</subscript> for [Fe(Htrz) <subscript>2</subscript> (trz)](BF <subscript>4</subscript> ) that is present in the composite as larger bulk particles rather than as NPs.

Details

Language :
English
ISSN :
2045-2322
Volume :
7
Issue :
1
Database :
MEDLINE
Journal :
Scientific reports
Publication Type :
Academic Journal
Accession number :
28939840
Full Text :
https://doi.org/10.1038/s41598-017-12444-x