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Items from 1 to 20 out of 11,748 results

article

Synthesis and structure of interaction products of quinoline-2(1H)-thione with molecular iodine

Margarita S. Chernov’yants, Zoya A. Starikova, Tatiana S. Kolesnikova, Anastasia O. Karginova, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2015 > 139 > Complete > 533-538

The behavior of quinoline-2(1H)-thione, which is a potential antithyroid drug toward molecular iodine, was investigated. The ability of quinoline-2(1H)-thione to form the outer-sphere charge-transfer complex C ₉ H ₇ NS.I ₂ with iodine molecular in dilute chloroform solution has been studied by UV-vis spectroscopy (lgβ=3.85). The crystal structure of the new salt 2-(quinoline-2-yldisulfanyl)quinolinium...

article

Al2O3+FeCo and Al2O3+FeNi coatings for multiwalled carbon nanotubes growth

J. Enrique Samaniego, J. Francisco Perez, O. Solorza, A. Garcia, more

In this work the preparation of growth of aligned multiwall carbon nanotubes (MWCNTs) is presented using FeCo and FeNi alumina-based catalysts. The catalysts were prepared using the sol–gel process and some stainless steel substrates were coated using the dip coating technique. These coatings were used for the MWCNT in a Chemical Vapor Deposition (CVD) reactor. X-ray diffraction (XRD) studies of the...

article

Ion beam induced structural and electrical modifications of Fe doped molybdenum oxide thin films

P. Vats, D. Chauhan, A.K. Patra, V.P. Gupta, more

Materials Science in Semiconductor Processing > 2015 > 31 > Complete > 593-598

In the present paper, structural and electrical properties of 2% Fe doped molybdenum oxide thin films grown by the pulsed laser deposition (PLD) technique have been reported. Ion beam induced modifications of these films were studied under the bombardment of 100MeV Ni ⁸⁺ ions. X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and micro-Raman measurements suggested the formation...

article

Development of electrochemical folic acid sensor based on hydroxyapatite nanoparticles

P. Kanchana, C. Sekar, P. Kanchana, C. Sekar

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2015 > 137 > Complete > 58-65

We report the synthesis of hydroxyapatite (HA) nanoparticles (NPs) by a simple microwave irradiation method and its application as sensing element for the precise determination of folic acid (FA) by electrochemical method. The structure and composition of the HA NPs characterized using XRD, FTIR, Raman and XPS. SEM and EDX studies confirmed the formation of elongated spherical shaped HA NPs with an...

article

Thermal stability, decomposition enthalpy, and Raman spectroscopy of 1-alkene secondary ozonides

Franco Cataldo, F. Cataldo

Tetrahedron Letters > 2015 > 56 > 8 > 994-998

The synthesis of a series of 1-alkene secondary ozonides was monitored with Raman spectroscopy which is very effective in the detection of the O–O stretching band of the 1,2,4-trioxolane ring. The 1-alkene secondary ozonides thermal decomposition was studied with DSC (differential scanning calorimetry). For all ozonides studied the decomposition onset was found at about 106°C and the decomposition...

article

Phase Transformation of TiO2 Thin Films in Function Bias Voltage

Lina M. Franco, Mariana Fazio, Emilia Halac, Daniel Vega, more

Procedia Materials Science > 2015 > 8 > Complete > 39-45

Titanium dioxide thin films have been deposited on silicon (100) and 316L stainless steel substrates by cathodic arc deposition in oxygen atmosphere with a titanium cathode. The process was run at room temperature and at 300°C, biasing the substrate with pulsed voltage (up to –10kV) and DC voltage (up to –120V). The crystalline structure was studied by Raman spectroscopy and X-ray diffraction. At...

article

Spectroscopic studies of electrophoretically deposited hybrid HAp/CNT coatings on titanium

E. Długoń, W. Niemiec, A. Frączek-Szczypta, P. Jeleń, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2014 > 133 > Complete > 872-875

Carbon nanotubes deposited on the surface of the metal can be used in a wide variety of applications for modern medicine including: sensors and sensor array devices, electrodes for neural system stimulation, scaffolds for improved healing process for bone defects. Additionally it is debated if deposited on the surface of e.g. endoprosthesis, CNT coating can significantly increase the strength of the...

article

Iron modified structural and optical spectral properties of bismuth silicate glasses

Rajesh Parmar, R.S. Kundu, R. Punia, P. Aghamkar, more

Physica B: Physics of Condensed Matter > 2014 > 450 > Complete > 39-44

Iron bismuth silicate glasses have been successfully synthesized by melt quenching technique. The amorphous nature of the glass samples is ascertained by the XRD patterns. The values of density, molar volume and crystalline volume have been measured and are found to decrease with increase in iron content. The glass transition temperature measured using Differential Scanning Calorimetry (DSC) also...

article

Self-irradiation and oxidation effects on americium sesquioxide and Raman spectroscopy studies of americium oxides

Denis Horlait, Richard Caraballo, Florent Lebreton, Christophe Jégou, more

Journal of Solid State Chemistry > 2014 > 217 > Complete > 159-168

Americium oxides samples were characterized by X-ray diffraction (XRD) and Raman spectroscopy, with an emphasis on their structural behavior under oxidation and self-irradiation. Raman spectra of americium dioxide (AmO ₂ ) and sesquioxide (Am ₂ O ₃ ) were obtained for the first time. With the help of literature data on isostructural oxides, Raman signatures of Ia-3 C-type Am...

article

Raman and SERS study on ibuprofen metal complexes with biomedical interest

Sergio Bonora, Annamaria Pisi, Stefano Ottani, Daniele Cesini, more

Vibrational Spectroscopy > 2014 > 73 > Complete > 45-55

Ibuprofen is one of the most widely used non-steroidal anti-inflammatory drugs (NSAIDs), in which the carboxylate group is available for metal–ligand interactions. The most stable geometries for ibuprofen (in both its protonated and deprotonated forms) were identified by optimizations obtained by the unrestricted Density Functional Theory (DFT). Theoretical study of ibuprofen interacting with Ag colloid...

article

Influence of pH on the synthesis and properties of polypyrrole on copper from phytic acid solution for corrosion protection

YanHua Lei, Nan Sheng, Atsushi Hyono, Mikito Ueda, more

Progress in Organic Coatings > 2014 > 77 > 4 > 774-784

Polypyrrole (PPy) films were deposited on copper from ''green'' inhibitor of phytic acid solution for corrosion protection of copper. The corrosion protection property of the PPy layer was studied by an immersion test in a NaCl aqueous solution. The polymerization process of PPy on copper changed with the pH values of phytic acid solution and current density applied. When one oxidized bare copper...

article

Infrared and Raman spectroscopy techniques applied to identification of explosives

María López-López, Carmen García-Ruiz, M. Lopez-Lopez, C. Garcia-Ruiz

Trends in Analytical Chemistry > 2014 > 54 > Complete > 36-44

This review summarizes the recent trends and developments of infrared and Raman spectroscopy applied to the identification of explosives that have been published over the past decade, focusing on the different fields where explosives were studied: homeland and international security, forensics, environmental, characterization of explosives, trace detection and fluorescence-free Raman analysis of explosives.

article

Electrochemical synthesis and characterization of Gadolinia-Doped Ceria thin films

O.S. Khalipova, V. Lair, A. Ringuedé, O.S. Khalipova, more

Electrochimica Acta > 2014 > 116 > Complete > 183-187

Cerium oxide based materials are versatile compounds in terms of properties and applications. This work analyses the production of thin layers, of less than 2μm thick of Gd-doped ceria (GDC) solid solution for high temperature electrochemical applications such as fuel cells and electrolyser cells. We focused on the synthesis of the deposit by cathodic electrodeposition by means of one unique chemical...

article

Origin of the large anharmonicity in the phonon modes of LiBH4

R. Gremaud, A. Züttel, A. Borgschulte, A.J. Ramirez-Cuesta, more

Chemical Physics > 2013 > 427 > Complete > 22-29

The dynamics and bonding of the complex hydride LiBH ₄ have been investigated by vibrational spectroscopy and density functional theory (DFT). The combination of infrared, Raman, and inelastic neutron-scattering (INS) spectroscopies on hydrided and deuterated samples reveals a complete picture of the dynamics of the BH ₄ ⁻ ions as well as of the lattice. Particular emphasis is...

article

Quantitative Raman spectroscopy as a tool to study the kinetics and formation mechanism of carbonates

L.J. Bonales, V. Muñoz-Iglesias, D. Santamaría-Pérez, M. Caceres, more

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2013 > 116 > Complete > 26-30

We have carried out a systematic study of abiotic precipitation at different temperatures of several Mg and Ca carbonates (calcite, nesquehonite, hydrocalcite) present in carbonaceous chondrites. This study highlights the capability of Raman spectroscopy as a primary tool for performing full mineralogical analysis. The precipitation reaction and the structure of the resulting carbonates were monitored...

article

Crystallinity and compositional changes in carbonated apatites: Evidence from 31P solid-state NMR, Raman, and AFM analysis

John-David P. McElderry, Peizhi Zhu, Kamal H. Mroue, Jiadi Xu, more

Journal of Solid State Chemistry > 2013 > 206 > Complete > 192-198

Solid-state (magic-angle spinning) NMR spectroscopy is a useful tool for obtaining structural information on bone organic and mineral components and synthetic model minerals at the atomic-level. Raman and ³¹ P NMR spectral parameters were investigated in a series of synthetic B-type carbonated apatites (CAps). Inverse ³¹ P NMR linewidth and inverse Raman PO ₄ ³⁻ ν ₁...

article

Raman spectroscopic study of the uranyl minerals vanmeersscheite U(OH)4[(UO2)3(PO4)2(OH)2]·4H2O and arsenouranylite Ca(UO2)[(UO2)3(AsO4)2(OH)2]·(OH)2·6H2O

Ray L. Frost, Jiří Čejka, Marilla J. Dickfos

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy > 2009 > 71 > 5 > 1799-1803

Raman and infrared spectra of secondary uranyl phosphate vanmeersscheite and Raman spectrum of secondary uranyl arsenate arsenuranylite were recorded and interpreted, and the spectra related to the structure of the minerals. Observed bands were attributed to the stretching and bending vibrations of uranyl, phosphate and/or arsenate units and OH (H ₂ O and OH ⁻ ) units. Phosphuranylite...

article

Ultra‐High Interfacial Thermal Conductance via Double hBN Encapsulation for Efficient Thermal Management of 2D Electronics (Small 12/2023)

Fan Ye, Qingchang Liu, Baoxing Xu, Philip X.‐L. Feng, more

Small > 19 > 12 > n/a - n/a

Ultra‐High Interfacial Thermal Conductance In article number 2205726, Baoxing Xu, Philip X.‐L. Feng, Xian Zhang, and co‐workers report on the ultra‐high interfacial thermal conductance in encapsulated van der Waals (vdW) heterostructures with single‐layer transition metal dichalcogenides MX₂ (MoS₂, WSe₂, WS₂) sandwiched between two hexagonal boron nitride (hBN) layers, through Raman spectroscopic...

article

Ultra‐High Interfacial Thermal Conductance via Double hBN Encapsulation for Efficient Thermal Management of 2D Electronics

Fan Ye, Qingchang Liu, Baoxing Xu, Philip X.‐L. Feng, more

Small > 19 > 12 > n/a - n/a

Heat dissipation is a major limitation of high‐performance electronics. This is especially important in emerging nanoelectronic devices consisting of ultra‐thin layers, heterostructures, and interfaces, where enhancement in thermal transport is highly desired. Here, ultra‐high interfacial thermal conductance in encapsulated van der Waals (vdW) heterostructures with single‐layer transition metal dichalcogenides...

article

Comparing lipid remodeling of brown adipose tissue, white adipose tissue, and liver after one‐week high fat diet intervention with quantitative Raman microscopy

Alexandra Paul, Belén Chanclón, Cecilia Brännmark, Pernilla Wittung‐Stafshede, more

Journal of Cellular Biochemistry > 124 > 3 > 382 - 395

Brown adipose tissue (BAT) consists of highly metabolically active adipocytes that catabolize nutrients to produce heat. Playing an active role in triacylglycerol (TAG) clearance, research has shown that dietary fatty acids can modulate the TAG chemistry deposition in BAT after weeks‐long dietary intervention, similar to what has been shown in white adipose tissue (WAT). Our objective was to compare...

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Search results

Synthesis and structure of interaction products of quinoline-2(1H)-thione with molecular iodine

Al2O3+FeCo and Al2O3+FeNi coatings for multiwalled carbon nanotubes growth

Ion beam induced structural and electrical modifications of Fe doped molybdenum oxide thin films

Development of electrochemical folic acid sensor based on hydroxyapatite nanoparticles

Thermal stability, decomposition enthalpy, and Raman spectroscopy of 1-alkene secondary ozonides

Phase Transformation of TiO2 Thin Films in Function Bias Voltage

Spectroscopic studies of electrophoretically deposited hybrid HAp/CNT coatings on titanium

Iron modified structural and optical spectral properties of bismuth silicate glasses

Self-irradiation and oxidation effects on americium sesquioxide and Raman spectroscopy studies of americium oxides

Raman and SERS study on ibuprofen metal complexes with biomedical interest

Influence of pH on the synthesis and properties of polypyrrole on copper from phytic acid solution for corrosion protection

Infrared and Raman spectroscopy techniques applied to identification of explosives

Electrochemical synthesis and characterization of Gadolinia-Doped Ceria thin films

Origin of the large anharmonicity in the phonon modes of LiBH4

Quantitative Raman spectroscopy as a tool to study the kinetics and formation mechanism of carbonates

Crystallinity and compositional changes in carbonated apatites: Evidence from 31P solid-state NMR, Raman, and AFM analysis

Raman spectroscopic study of the uranyl minerals vanmeersscheite U(OH)4[(UO2)3(PO4)2(OH)2]·4H2O and arsenouranylite Ca(UO2)[(UO2)3(AsO4)2(OH)2]·(OH)2·6H2O

Ultra‐High Interfacial Thermal Conductance via Double hBN Encapsulation for Efficient Thermal Management of 2D Electronics (Small 12/2023)

Ultra‐High Interfacial Thermal Conductance via Double hBN Encapsulation for Efficient Thermal Management of 2D Electronics

Comparing lipid remodeling of brown adipose tissue, white adipose tissue, and liver after one‐week high fat diet intervention with quantitative Raman microscopy

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