Browsing by Subject "Raman spectroscopy"
Now showing items 1-20 of 32
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Article
Adaptive VN/Ag nanocomposite coatings with lubricious behavior from 25 to 1000 °c
(2010)A two-phase nanocomposite coating that consists of inclusions of silver in a vanadium nitride matrix (VN/Ag) was investigated as a potential adaptive coating with a reduced friction coefficient from 25 to 1000 °C. This ...
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Article
Composite DLC-metal/metal-carbide coatings produced by electron enhanced unbalanced magnetron sputtering
(1997)Composite coatings consisting of metal containing diamond like carbons were produced by unbalanced magnetron sputtering in a closed field magnetic configuration. Targets of Pta and W were poisoned with acetylene during the ...
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Article
Coupling of helix E-F motion with the O-nitrito and 2-nitrovinyl coordination in myoglobin
(2017)Myoglobin (Mb) is known to react slowly with nitirite to form the green pigment by NO2 − cordination to the heme Fe in the O-binding nitrito (O1[sbnd]N[dbnd]O2) mode and to the heme 2-vinyl position. Nitrite is a powerful ...
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Article
Detection of the His-heme Fe2+-NO species in the reduction of NO to N2O by ba3-oxidase from thermus thermophilus
(2005)Reaction pathways in the enzymatic formation and cleavage of the N-N and N-O bonds, respectively, are difficult to verify without the structure of the intermediates, but we now have such information on the heme a3 2+-NO ...
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Article
Direct observation of ultrafast long-range charge separation at polymer-fullerene heterojunctions
(2014)In polymeric semiconductors, charge carriers are polarons, which means that the excess charge deforms the molecular structure of the polymer chain that hosts it. This results in distinctive signatures in the vibrational ...
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Conference Object
Effect of molecular weight on the vibronic structure of a diketopyrrolopyrrole polymer
(SPIE, 2016)Resonance Raman Spectroscopy (RRS) is employed in this study to examine the influence of molecular weight on the optical response of a diketopyrrolopyrrole polymer (DPP-TT-T) in solution. The vibronic structure observed ...
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Article
Layered atomic structures of double oxides for low shear strength at high temperatures
(2010)Double oxide phases combining a transition metal and a noble metal have recently become a subject of investigation as solid lubricant materials for high-temperature tribological applications. Here, we study the changes in ...
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Article
Local structure and influence of bonding on the phase-change behavior of the chalcogenide compounds K1-xRbxSb5S8
(2007)KSb5S8 and its solid solution analogs with Rb and Tl were found to exhibit a reversible and tunable glass→crystal→glass phase transition. Selected members of this series were analyzed by differential scanning calorimetry ...
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Doctoral Thesis Open Access
Multi-bacteria, multi-antibiotic, testing using Surface Enhanced Raman Spectroscopy (SERS) for Urinary Tract Infection (UTI) diagnosis / Katerina Hadjigeorgiou
(Πανεπιστήμιο Κύπρου, Πολυτεχνική Σχολή / University of Cyprus, Faculty of Engineering, 2020-05)Ο σκοπός της παρούσας έρευνας ήταν η ανάπτυξη μίας γρήγορης και αξιόπιστης μεθόδου, βασισμένης στην Ενισχυμένη Φασματοσκοπία Ράμαν, η οποία (i) θα προσδιορίζει αν ένα δείγμα είναι “θετικό” ή “αρνητικό” για ουρολοίμωξη, ...
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Article
The nanostructure, wear and corrosion performance of arc-evaporated CrBxNy nanocomposite coatings
(2009)The composition, nanostructure, tribological and corrosion behaviour of reactive arc evaporated CrBxNy coatings have been studied and compared to CrN. The CrBxNy coatings were deposited on a commercial Oerlikon Balzers RCS ...
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Article
Nitric-oxide reductase: Structure and properties of the catalytic site from resonance Raman scattering
(2002)We have applied resonance Raman spectroscopy to investigate the properties of the dinuclear center of oxidized, reduced, and NO-bound nitric-oxide reductase from Paracoccus denitrificans. The spectra of the oxidized enzyme ...
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Article
Nitrite coordination in myoglobin
(2017)The coordination of nitrite in myoglobin (Mb) has been characterized by resonance Raman spectroscopy and the frequencies of the nitrite bound to the heme Fe as well to the 2-vinyl have been computed by density functional ...
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Article
Probing nitrite coordination in horseradish peroxidase by resonance Raman spectroscopy: Detection of two binding sites
(2017)Nitrite is a powerful oxidant that affects the activity of peroxidases towards various substrates and leads to heme macrocycle modifications in members of the peroxidase family, such as the horseradish peroxidase (HRP). ...
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Article
The production and decay kinetics of CIOO in water and freon-11: A time-resolved resonance Raman study
(2001)The production and decay kinetics of ClOO in water and freon-11 were studied using time-resolved resonance Raman (TRRR) spectroscopy. The formation of ClOO following OClO photoexcitation at 390 nm was investigated using ...
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Article
Raman spectroscopy using a fiber optic probe with subwavelength aperture
(1994)Raman spectroscopy with subwavelength spatial resolution of a diamond sample was recorded using a tapered fiber optical probe in conjunction with a conventional Raman spectrometer. The experiment demonstrates the potential ...
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Article
Resonance raman spectroscopy of nitric oxide reductase and cbb3 Heme-Copper oxidase
(2008)Elucidating the structure and properties of the active sites in cbf 3 heme-copper oxidase and in nitric oxide reductase (Nor) is crucial in understanding the reaction mechanisms of oxygen and nitric oxide reduction by both ...
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Doctoral Thesis Open Access
Resonance Raman studies on nitryl chloride dissolved in methanol
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2013-10)Η κατανόηση των βασικών πτυχών της εξάρτησης της δραστικότητας ενός συστήματος απο τη φάση στην οποία βρίσκεται αποτελεί σημαντική πρόκληση για την ατμοσφαιρική Χημεία. Αυτή η περιοχή της περιβαλλοντικής χημείας είναι στενά ...
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Article
Role of P-containing species in phosphated CeO2 in the deterioration of its oxygen storage and release properties
(2006)The chemical nature of P-containing species incorporated on the surface and within the subsurface regions of CeO2 solid and their effects on the deterioration of the oxygen storage and release properties of phosphated ceria ...
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Article
Spectroscopic investigations on the effect of humic acid on the formation and solubility of secondary solid phases of Ln2(CO3) 3
(2011)The formation of secondary Ln(III) solid phases (e.g., Nd 2(CO3)3 and Sm2(CO3) 3) was studied as a function of the humic acid concentration in 0.1 mol/L NaClO4 aqueous solution in the neutral pH range (5-6.5). The solid ...
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Doctoral Thesis Open Access
Spectroscopic studies of molecular conformations of conjugated polymers for OPV applications
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2019-12)Τα οργανικά ηλεκτρονικά είναι ένας επιστημονικός κλάδος που προέκυψε ως μια ελκυστική εναλλακτική στην τεχνολογία πυριτίου λόγο του σημαντικά μειωμένου κόστους παραγωγής καθώς και κάποιων επιπλέον δυνατοτήτων που προσφέρουν ...