scholarly journals Optical evidence for adsorption of charged inverse micelles in a Stern layer

2020 ◽  
Vol 589 ◽  
pp. 124451 ◽  
Author(s):  
Bavo Robben ◽  
Filip Beunis ◽  
Kristiaan Neyts ◽  
Michiel Callens ◽  
Thomas Johansson ◽  
...  
Keyword(s):  
Stern Layer ◽  
Inverse Micelles ◽  
Optical Evidence

scholarly journals Correction: Space charge limited release of charged inverse micelles in non-polar liquids

2021 ◽  
Author(s):  
Manoj Prasad ◽  
Filip Strubbe ◽  
Filip Beunis ◽  
Kristiaan Neyts
Keyword(s):  
Space Charge ◽  
Chem Phys ◽  
Polar Liquids ◽  
Inverse Micelles ◽  
Phys Chem Chem Phys ◽  
Space Charge Limited

Correction for ‘Space charge limited release of charged inverse micelles in non-polar liquids’ by Manoj Prasad et al., Phys. Chem. Chem. Phys., 2016, 18, 19289–19298, DOI: 10.1039/C6CP03544B.

scholarly journals Optical Evidence for the Assembly of Sensors Based on Reduced Graphene Oxide and Polydiphenylamine for the Detection of Epidermal Growth Factor Receptor

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 258 ◽  
Author(s):  
Mihaela Baibarac ◽  
Monica Daescu ◽  
Szilard N. Fejer
Keyword(s):  
Epidermal Growth Factor Receptor ◽  
Graphene Oxide ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Raman Scattering ◽  
Ftir Spectroscopy ◽  
Growth Factor Receptor ◽  
Reduced Graphene ◽  
Epidermal Growth ◽  
Optical Evidence

Using Raman scattering and FTIR spectroscopy, new optical evidence for the assembly of sensors based on reduced graphene oxide (RGO) and polydiphenylamine (PDPA) for the electrochemical detection of the epidermal growth factor receptor (EGFR) are reported. The assembly process of the RGO sheets electrochemical functionalized with PDPA involves the chemical adsorption of 1,4-phenylene diisothiocyanate (PDITC), followed by an incubation with protein G in phosphate buffer (PB) solution and after that the interaction with EGFR antibodies solution. Taking into account the changes reported by Raman scattering and FTIR spectroscopy, a chemical mechanism of the assembling process for this sensor is proposed. The preliminary testing of the electrochemical activity of the sensors based on RGO and PDPA was reported by cyclic voltammetry.

Nature and mechanism of ilmenite alteration: a Mössbauer and X-ray diffraction study of oxidized ilmenite from the Beja-Acebuches Ophiolite Complex (SE Portugal)

2002 ◽  
Vol 66 (3) ◽  
pp. 421-430 ◽  
Author(s):  
J. C. Waerenborgh ◽  
J. Figueiras ◽  
A. Mateus ◽  
M. Gonçalves
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
X Ray Diffraction ◽  
Ophiolite Complex ◽  
Cation Site ◽  
X Ray ◽  
Mößbauer Spectroscopy ◽  
Ilmenite Structure ◽  
Optical Evidence ◽  
Excess Fe

AbstractIlmenites from the least-altered rocks of the Beja-Acebuches Ophiolite Complex (SE Portugal), with low Ti values and excess Fe, despite rare optical evidence of hematite exsolution, were studied by 57Fe Mössbauer spectroscopy and X-ray diffraction. According to single-crystal XRD the sequence of alternate layers characteristic of the ideal ilmenite structure is preserved, the excess Fe being accommodated in the Ti layers. No superparamagnetic oxides were detected by 57Fe Mössbauer spectroscopy. The typical spectra of bulk αFe2O3 and of Fe3+-containing ilmenite, in the paramagnetic state above 49 K and magnetically ordered at 6 K, are observed. The average degree of oxidation of the ilmenites, estimated from the chemical analysis assuming ideally stoichiometric full cation site occupancies, is also confirmed by 57Fe Mössbauer data. Since our crystal chemistry study gave no evidence of crypto-exsolution textures within the ilmenite with the observed compositions, fast cooling from magmatic temperatures and decomposition of ilmenite in supergene conditions is suggested.

Cis-bis(2-phenylpyridine)platinum(II):magneto-optical evidence of two-level phosphorescence of a quasi-binuclear platinum(II) complex

1986 ◽  
Vol 123 (4) ◽  
pp. 264-267 ◽  
Author(s):  
L. Bär ◽  
G. Gliemann ◽  
L. Chassot ◽  
A. Von Zelewsky
Keyword(s):  
Optical Evidence

Hydrophobically Modified Dendrimers as Inverse Micelles:  Formation of Cylindrical Multidendrimer Nanostructures

2001 ◽  
Vol 34 (19) ◽  
pp. 6701-6707 ◽  
Author(s):  
Franziska Gröhn ◽  
Barry J. Bauer ◽  
Eric J. Amis
Keyword(s):  
Inverse Micelles ◽  
Hydrophobically Modified

Catalysis by Inverse Micelles in Non-Polar Solvents

1973 ◽  
pp. 127-145 ◽  
Author(s):  
E. J. Fendler ◽  
Shuya A. Chang ◽  
J. H. Fendler ◽  
R. T. Medary ◽  
O. A. El Seoud ◽  
...  
Keyword(s):  
Polar Solvents ◽  
Inverse Micelles

Optical Evidence for the Direct Reduction of CuO to Cu in H2

1961 ◽  
Vol 35 (6) ◽  
pp. 2259-2260 ◽  
Author(s):  
Harold Wieder ◽  
A. W. Czanderna
Keyword(s):  
Direct Reduction ◽  
Optical Evidence

Nickel-bearing clay minerals: I. Optical spectroscopic study of nickel crystal chemistry

Clay Minerals ◽  
1985 ◽  
Vol 20 (3) ◽  
pp. 367-387 ◽  
Author(s):  
A. Manceau ◽  
G. Calas ◽  
A. Decarreau
Keyword(s):  
Clay Minerals ◽  
Crystal Chemistry ◽  
New Caledonia ◽  
Ore Deposits ◽  
Octahedral Sheet ◽  
Al Content ◽  
Intermediate Phases ◽  
Optical Evidence ◽  
Trioctahedral Smectites ◽  
Nickel Crystal

AbstractNickel crystal chemistry was systematically studied in various phyllosilicates, mainly the natural phases selected from the ‘garnierites’ of the supergene ore deposits of New Caledonia. Minerals which do not usually occur in New Caledonian parageneses were synthesised, as they could represent intermediate phases of genetic importance. In the kerolite-pimelite series, a linear relationship occurred between the ratioI(13,20)/I(02,11)of thehkbands and Ni-content. Diffuse reflectance spectra were used to derive the crystal chemical parameters of Ni. These confirmed its divalent character and its occupation of octahedral sites; the resulting structural distortion was slight and could not be detected in some minerals. There was no optical evidence for Ni atoms in 4-fold coordination. The two main parameters which showed significant variations among the studied phases were site distortion and crystal field stabilization energy (CFSE). Site distortion was at a maximum in trioctahedral smectites and sepiolite. CFSE depended on the mineralogy, crystallinity and chemical composition (Al-content) of the phase. Finally, clay minerals are classified according to the increasing stability of Ni in the octahedral sheet, which has been tentatively related to the geochemical distribution of this element. Secondary minerals are usually enriched vs. primary ones and among them are nepouite and kerolite which exhibit a high CFSE in contrast to sepiolite.

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