PMID- 28597887
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180202
LR  - 20180202
IS  - 1463-9084 (Electronic)
IS  - 1463-9076 (Linking)
VI  - 19
IP  - 24
DP  - 2017 Jun 21
TI  - Revealing the structure and functionality of graphene oxide and reduced graphene 
      oxide/pyrene carboxylic acid interfaces by correlative spectral and imaging 
      analysis.
PG  - 16038-16046
LID - 10.1039/c7cp02443f [doi]
AB  - A high-end correlated spectral and imaging multianalysis, adapted for 
      bidimensional systems, is presented here to analyze graphene oxide (GO) and 
      reduced GO (rGO) modified with pyrene carboxylic acid (PCA). Confocal Raman 
      mapping was used next to two-photon excited Fluorescence Lifetime Imaging 
      Microscopy (FLIM) to characterize the distribution of PCA on GO and rGO and 
      compared to UV-vis and X-ray Photoelectron Spectroscopy (XPS) analysis of the 
      materials. Raman imaging clearly highlights the difference in the spatial 
      distribution of PCA molecules on GO and rGO. Two-photon excited FLIM helped in 
      gaining insight into the elusive phenomena and effects occurring at the GO-PCA 
      interface level. Apart from the charge transfer effects from PCA molecules to GO, 
      the GO structure depends on the molecular orientation and the spatial 
      distribution of PCA molecules identified by different sp(2) network domains in 
      Raman mapping. Heating of GO-PCA results in an enhancement of the sp(2) network 
      presumably as the PCA aromatic core becomes fused into the GO nanosheets whilst 
      enriching the resulting rGO nanosheets with carboxyl functionalities. This 
      "healing" effect observed in rGO-PCA might be of high importance for applications 
      using rGO-PCA matrices and interfaces in particular for electrical devices.
FAU - Zaharie-Butucel, D
AU  - Zaharie-Butucel D
AD  - Faculty of Physics, Babes-Bolyai University, Cluj-Napoca, 400084, Romania. 
      simion.astilean@phys.ubbcluj.ro.
FAU - Potara, M
AU  - Potara M
FAU - Craciun, A M
AU  - Craciun AM
FAU - Boukherroub, R
AU  - Boukherroub R
FAU - Szunerits, S
AU  - Szunerits S
FAU - Astilean, S
AU  - Astilean S
LA  - eng
PT  - Journal Article
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
EDAT- 2017/06/10 06:00
MHDA- 2017/06/10 06:01
CRDT- 2017/06/10 06:00
PHST- 2017/06/10 06:00 [pubmed]
PHST- 2017/06/10 06:01 [medline]
PHST- 2017/06/10 06:00 [entrez]
AID - 10.1039/c7cp02443f [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2017 Jun 21;19(24):16038-16046. doi: 10.1039/c7cp02443f.