Thermal analysis of graphite intercalation compounds with FeCl3

Skoropanov, A.S.; Kizina, TatijanaA.; Samal, G.I.; Vecher, A.A.; Novikov, Yu. N.; Vol'pin, M. E.

doi:10.1016/0379-6779(84)90002-x

Cited by 5 publications

(2 citation statements)

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“…Besides organic solvents, graphene flakes can be suspended in water if a surfactant is present. By pre-mixing a surfactant and water solution and subjecting the solution to ultrasonication in the presence of graphite powder, suspensions of graphene in water at concentrations of up to 1 mg/ml can be produced 55 . However, compared to CVD grown graphene, solvent dispersed graphene exhibits smaller flake sizes and the presence of foreign molecules in the vicinity of the graphene flakes reduces and increases graphene's optical and electron conductivities respectively 56 .…”

Section: Solvent Soluble Graphenementioning

confidence: 99%

“…These measurement values and the corresponding calculated σ dc /σ op values are tabulated in Table 3.8. As FeCl 3 decomposes at ∼ 523 K, the difference in performance of the TCEs in these two scenarios is expected to be due to the effect of FeCl 3 decomposition [54][55][56] . The close proximity between the decomposing FeCl 3 and the oxygen atoms in GO would allow the possibility of a chemical reaction to occur and this would be observable in the O 1s 1/2 spectra as shown in Fig.…”

Section: Xps Of Go Mixed With Feclmentioning

confidence: 99%

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Graphene, nanotube & organic materials composites for transparent conductor and electrical device applications

Kwan¹

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Heralded as the next miracle material, graphene oxide (GO) has the potential to be used in a variety of next generation devices. However, there are still gaps in the fundamental knowledge on this material and even now, a canonical model of GO has not been developed. The two aims of this thesis are to support the development of the canonical model by studying the O 1s 1/2 spectra of GO and to develop the use of reduced GO for electronic device applications. Here, the identities of peaks in the O 1s 1/2 spectrum were identified by chemical and mathematical analysis and the fabrication processes were made environmentally friendly and industrially scalable by the use of ascorbic acid for low temperature reduction of GO and ultrasonic spray coating for large area deposition respectively in transparent conducting electrodes (TCE). Further to this, the conductive character of reduced GO was also utilized in a bilayer device design with phthalocyanines for a NO 2 sensing application. The binding energy of O 1s 1/2 electrons in the carbonyl, carboxyl, hydroxyl and epoxy functional groups were found to be 530.9, 532.3, 533.1 & 534.4 eV respectively. With this information, metastability in GO was understood to result in the preferential formation of the carboxyl functional group, which cause vacancies in the graphene flake and are difficult to remove, during the thermal reduction of GO. This was estimated to occur between the temperatures of 543 & 561 K and * 1

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Section: Solvent Soluble Graphenementioning

confidence: 99%

Section: Xps Of Go Mixed With Feclmentioning

confidence: 99%