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You searched for: Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Subject term annealing Remove constraint Subject term: annealing Subject term Fourier transform infrared spectroscopy Remove constraint Subject term: Fourier transform infrared spectroscopy
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1. A high-performance aromatic co-polyimide fiber: structure and property relationship during gradient thermal annealing

Author:
Xiaona Yan; Mengying Zhang; Shengli Qi; Guofeng Tian; Hongqing Niu; Dezhen Wu
Source:
Journal of materials science 2018 v.53 no.3 pp. 2193-2207
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; annealing; glass transition temperature; heat treatment; modulus of rupture; nitrogen; spinning; thermal properties; thermogravimetry; weight loss
Abstract:
... A high-performance aromatic co-polyimide (co-PI) fiber was prepared by thermal treating the polyamic acid (PAA) precursor fiber produced through a wet spinning technique. A gradient thermal treatment protocol, which was selected based on the thermogravimetric analysis of PAA fibers, was employed for achieving the best structure and fiber performance. The structural and morphological variations of ...
DOI:
10.1007/s10853-017-1552-1

2. Adsorption of Ultrathin Ethylene Carbonate Films on Pristine and Lithiated Graphite and Their Interaction with Li

Author:
Maral Bozorgchenani; Florian Buchner; Katrin Forster-Tonigold; Jihyun Kim; Axel Groß; R. Jürgen Behm
Source:
Langmuir 2018 v.34 no.29 pp. 8451-8463
ISSN:
1520-5827
Subject:
Fourier transform infrared spectroscopy; X-radiation; X-ray photoelectron spectroscopy; adsorption; ambient temperature; annealing; density functional theory; desorption; electrolytes; graphene; lithium; lithium batteries; solvents
Abstract:
... Aiming at a better understanding of the solid–electrolyte interphase formation in Li-ion batteries, we have investigated the interaction of ultrathin films of ethylene carbonate (EC), which is a key solvent of battery electrolytes, with pristine and lithiated highly oriented pyrolytic graphite (HOPG) and with postdeposited Li. Employing X-ray and ultraviolet photoelectron spectroscopy as well as F ...
DOI:
10.1021/acs.langmuir.8b01054

3. Annealing of silicon carbonitride nanostructured thin films: interdependency of hydrogen content, optical, and structural properties

Author:
Z. Khatami; C. Nowikow; J. Wojcik; P. Mascher
Source:
Journal of materials science 2018 v.53 no.2 pp. 1497-1513
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; annealing; chemical bonding; coatings; desorption; hydrogen; photovoltaic cells; quantitative analysis; refractive index; silicon; silicon carbide; temperature; transmission electron microscopy; vapors
Abstract:
... Silicon carbonitride (SiCₓNy) materials, inspired by their outstanding multifunctional properties, are finding increasing applications in a variety of fields, including as next generation solar cells and hard coatings. Hydrogenated SiCₓNy thin films, along with binary submatrices of stoichiometric SiC and SiN₃ as a reference, were deposited using electron cyclotron resonance plasma-enhanced chemic ...
DOI:
10.1007/s10853-017-1576-6

4. Aqueous Synthesis of High-Quality Cu2ZnSnS4 Nanocrystals and Their Thermal Annealing Characteristics

Author:
Cameron Ritchie; Anthony S. R. Chesman; Mark Styles; Jacek J. Jasieniak; Paul Mulvaney
Source:
Langmuir 2018 v.34 no.4 pp. 1655-1665
ISSN:
1520-5827
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; additives; annealing; heat treatment; ligands; nanocrystals; sulfides; temperature; thiourea; tin; zinc
Abstract:
... Copper zinc tin sulfide (CZTS) nanocrystal inks are promising candidates for the development of cheap, efficient, scalable, and nontoxic photovoltaic (PV) devices. However, optimization of the synthetic chemistry to achieve these goals remains a key challenge. Herein we describe a single-step, aqueous-based synthesis that yields high-quality CZTS nanocrystal inks while also minimizing residual org ...
DOI:
10.1021/acs.langmuir.7b03885

5. CO-Bridged H-Cluster Intermediates in the Catalytic Mechanism of [FeFe]-Hydrogenase CaI

Author:
Michael W. Ratzloff; Jacob H. Artz; David W. Mulder; Reuben T. Collins; Thomas E. Furtak; Paul W. King
Source:
Journal of the American Chemical Society 2018 v.140 no.24 pp. 7623-7628
ISSN:
1520-5126
Subject:
Chlamydomonas reinhardtii; Clostridium acetobutylicum; Fourier transform infrared spectroscopy; annealing; cysteine; geometry; hydrides; hydrogen; hydrogen production; isotopes; models; temperature
Abstract:
... The [FeFe]-hydrogenases ([FeFe] H₂ases) catalyze reversible H₂ activation at the H-cluster, which is composed of a [4Fe–4S]H subsite linked by a cysteine thiolate to a bridged, organometallic [2Fe–2S] ([2Fe]H) subsite. Profoundly different geometric models of the H-cluster redox states that orchestrate the electron/proton transfer steps of H₂ bond activation have been proposed. We have examined th ...
DOI:
10.1021/jacs.8b03072

6. Development of liquid repellent coating on cotton fabric by simple binary silanization with excellent self-cleaning and oil-water separation properties

Author:
Anita Panda; Priya Varshney; Soumya S. Mohapatra; Aditya Kumar
Source:
Carbohydrate polymers 2018 v.181 pp. 1052-1060
ISSN:
0144-8617
Subject:
Fourier transform infrared spectroscopy; annealing; coatings; contact angle; cotton fabric; detergents; energy-dispersive X-ray analysis; ethylene glycol; glycerol; hydrophobicity; industrial applications; liquids; moieties; pH; petroleum; scanning electron microscopes; silane; solvents; temperature; thermal stability; ultrasonic treatment; ultraviolet radiation; wettability
Abstract:
... This paper aims to develop a facile and single step method for the fabrication of superhydrophobic coating on cotton fabric. The coating has been prepared by using two silane trichloro(octadecyl)silane and (pentaflurophenyl)triethoxy silane by solution immersion technique. The wettability, surface topography and chemical compostion of the cotton fabric before and after treatment were charecterized ...
DOI:
10.1016/j.carbpol.2017.11.044

7. Electronic structure and luminescence assets in white-light emitting Ca₂V₂O₇, Sr₂V₂O₇ and Ba₂V₂O₇ pyro-vanadates: X-ray absorption spectroscopy investigations

Author:
Aditya Sharma; Mayora Varshney; Keun-Hwa Chae; Sung Ok Won
Source:
RSC advances 2018 v.8 no.46 pp. 26423-26431
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray absorption spectroscopy; X-ray diffraction; absorption; annealing; assets; barium; calcium; chemical precipitation; crystal structure; energy; geometry; metal ions; optical properties; photoluminescence; rare earth elements; scanning electron microscopy; strontium; white light
Abstract:
... Ca₂V₂O₇, Sr₂V₂O₇, and Ba₂V₂O₇ pyro-vanadates were synthesized using a modified chemical precipitation method and annealing. Detailed crystal structure, morphology, electronic structure and optical properties were investigated by XRD, UV-visible absorption, FTIR, Raman, FE-SEM, XANES, and photoluminescence spectroscopy. Rietveld refinement on the XRD patterns of Ca₂V₂O₇, Sr₂V₂O₇, and Ba₂V₂O₇ has co ...
DOI:
10.1039/c8ra03347a

8. Evidence of Ion-Beam-Induced Annealing in Graphene Oxide Films Using in Situ X-Ray Diffraction and Spectroscopy Techniques

Author:
Chetna Tyagi; S. A. Khan; Indra Sulania; R. Meena; D. K. Avasthi; Ambuj Tripathi
Source:
Journal of physical chemistry 2018 v.122 no.17 pp. 9632-9640
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; annealing; carbon nanotubes; crystal structure; fullerene; gold; graphene; graphene oxide; ions; irradiation
Abstract:
... Ion beam irradiation is one of the methods to tune the properties of graphene oxide (GO) by modifying the ratio of sp² and sp³ hybridization. However, the inherent defects present in GO during its synthesis deteriorate its properties (e.g., reduction efficiency) and are difficult to remove. We have earlier demonstrated the annealing of defects in carbon nanostructures (fullerene, carbon nanotube, ...
DOI:
10.1021/acs.jpcc.7b10699

9. Experimental and Theoretical Infrared Signatures of REMO3 (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

Author:
Emile Haye; Erwan Andre; Fabien Capon; Silvère Barrat; Marco De La Pierre; Roberto Dovesi; Cedric Carteret
Source:
Journal of physical chemistry 2018 v.122 no.19 pp. 10519-10525
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; air; annealing; cobalt; density functional theory; energy-dispersive X-ray analysis; geometry; iron; physical chemistry
Abstract:
... The aim of this work is to investigate the consequences of lattice distortion on the vibrational features of rare-earth perovskites. To this end, a series of REMO₃ compounds has been synthesized with different rare earths (RE = La, Pr, Nd, Sm) and different transition metals (M = Fe, Co) to evaluate their respective role on lattice distortion. Thin films of these materials have been deposited by m ...
DOI:
10.1021/acs.jpcc.8b01433

10. Facile fabrication of superhydrophobic/superoleophilic microporous membranes by spray-coating ytterbium oxide particles for efficient oil-water separation

Author:
Asif Matin; Umair Baig; M.A. Gondal; Sultan Akhtar; S.M. Zubair
Source:
Journal of membrane science 2018 v.548 pp. 390-397
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; annealing; coatings; contact angle; dispersions; gravity; hydrophobicity; microporous membranes; oils; oxides; scanning electron microscopy; stainless steel; temperature; wettability; ytterbium
Abstract:
... For oil-water separation, micron-sized stainless steel membranes were fabricated by spray-coating using dispersions of ytterbium oxide (Yb₂O₃). The operational parameters such as particles concentration and annealing temperature were optimized to achieve the best separation efficiency. Scanning electron microscopy (SEM) images of (Yb₂O₃) particles revealed that annealing at 200°C results in sharp- ...
DOI:
10.1016/j.memsci.2017.11.045

11. Facile synthesis, characterization and magnetic properties of manganese ferrite/carbon composites

Author:
Eliza Muntean; Marcela Stoia; Cornelia Păcurariu
Source:
Thermochimica acta 2018 v.667 pp. 122-131
ISSN:
0040-6031
Subject:
Fourier transform infrared spectroscopy; air; alcohols; annealing; carbon; composite materials; differential scanning calorimetry; ferric compounds; gels; ions; magnetic properties; nitrates; nitrogen; temperature; thermal degradation; thermogravimetry
Abstract:
... Manganese ferrite/carbon (MnFe₂O₄/C) composites were prepared by the thermal decomposition of Mn(NO₃)₂-Fe(NO₃)₃-polyvinyl alcohol (PVA) gels with different PVA content. Thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) as well as the Fourier-transform infrared spectroscopy (FTIR) confirmed the redox interaction between PVA and nitrate ions at around 100 °C. The effect of ...
DOI:
10.1016/j.tca.2018.07.015

12. Fast pyrolysis of large coal particles in a novel hot plate reactor: Effects of the reaction atmosphere on the porous structure and char reactivity

Author:
Carlos F. Valdés; Farid Chejne
Source:
Journal of analytical and applied pyrolysis 2018 v.133 pp. 39-47
ISSN:
0165-2370
Subject:
Fourier transform infrared spectroscopy; annealing; carbon dioxide; coal; combustion; heat; nitrogen; pyrolysis; thermoplastics
Abstract:
... Fast pyrolysis of large particles of coal semi-anthracite (SA) in a novel Hot Plate Reactor (HPR) was carried out. Advantages of gas flow control of the HPR were used to compare the effect of the reaction atmosphere on the fast pyrolysis process, mainly in aspects such as chemical and porous structure, also in char reactivity. The effects of the heating rate and the reaction atmosphere were evalua ...
DOI:
10.1016/j.jaap.2018.05.003

13. Functionalization of SiO2 Surfaces for Si Monolayer Doping with Minimal Carbon Contamination

Author:
Maart van Druenen; Gillian Collins; Colm Glynn; Colm O’Dwyer; Justin D. Holmes
Source:
ACS applied materials & interfaces 2018 v.10 no.2 pp. 2191-2201
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; annealing; capacitance; carbon; electric power; electrochemistry; materials science; phosphorous acid; semiconductors; silica; silicon
Abstract:
... Monolayer doping (MLD) involves the functionalization of semiconductor surfaces followed by an annealing step to diffuse the dopant into the substrate. We report an alternative doping method, oxide-MLD, where ultrathin SiO₂ overlayers are functionalized with phosphonic acids for doping Si. Similar peak carrier concentrations were achieved when compared with hydrosilylated surfaces (∼2 × 10²⁰ atoms ...
DOI:
10.1021/acsami.7b16950

14. Light illumination intensity dependence of photovoltaic parameter in polymer solar cells with ammonium heptamolybdate as hole extraction layer

Author:
Zhiyong Liu; Shengli Niu; Ning Wang
Source:
Journal of colloid and interface science 2018 v.509 pp. 171-177
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; ammonium compounds; annealing; anodes; electric power; indium tin oxide; light intensity; molybdates; molybdenum; polymers; solar cells; volatile organic compounds
Abstract:
... A low-temperature, solution-processed molybdenum oxide (MoOX) layer and a facile method for polymer solar cells (PSCs) is developed. The PSCs based on a MoOX layer as the hole extraction layer (HEL) is a significant advance for achieving higher photovoltaic performance, especially under weaker light illumination intensity. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spec ...
DOI:
10.1016/j.jcis.2017.09.010

15. Low temperature-processed ZnO thin films for p–n junction-based visible-blind ultraviolet photodetectors

Author:
Hanna B.; Surendran K. P.; Narayanan Unni K. N.
Source:
RSC advances 2018 v.8 no.65 pp. 37365-37374
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; annealing; atomic force microscopy; detectors; image analysis; light scattering; lighting; monitoring; nanoparticles; particle size; photoluminescence; scanning electron microscopy; ultraviolet-visible spectroscopy; zinc oxide
Abstract:
... Ultraviolet (UV) photodetectors have drawn extensive attention due to their numerous applications in both civilian and military areas including flame detection, UV sterilization, aerospace UV monitoring, missile early warning, and ultraviolet imaging. Zinc oxide (ZnO)-based UV detectors exhibit remarkable performance; however, many of them are not visible-blind, and the fabrication techniques invo ...
DOI:
10.1039/c8ra07312k

16. Low-temperature direct bonding of silicon nitride to glass

Author:
Limor Pasternak; Yaron Paz
Source:
RSC advances 2018 v.8 no.4 pp. 2161-2172
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; adhesives; air; annealing; coatings; energy; energy-dispersive X-ray analysis; glass; image analysis; nitrogen; oxidation; silicon; silicon nitride; transmission electron microscopy
Abstract:
... Direct bonding may provide a cheap and reliable alternative to the use of adhesives. While direct bonding of two silicon surfaces is well documented, not much is known about direct bonding between silicon nitride and glass. This is unfortunate since silicon nitride is extensively used as an anti-reflection coating in the PV industry, often in contact with a shielding layer made of glass. A series ...
DOI:
10.1039/c7ra08854j

17. Molecular Layer Deposition of a Highly Stable Silicon Oxycarbide Thin Film Using an Organic Chlorosilane and Water

Author:
Richard G. Closser; David S. Bergsman; Stacey F. Bent
Source:
ACS applied materials & interfaces 2018 v.10 no.28 pp. 24266-24274
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; X-ray reflectivity; acids; ambient temperature; annealing; chemical bases; condensation reactions; crosslinking; dielectric properties; electronic equipment; polymers; refractive index; silicon; solvents; wavelengths
Abstract:
... In this study, molecular layer deposition (MLD) was used to deposit ultrathin films of methylene-bridged silicon oxycarbide (SiOC) using bis(trichlorosilyl)methane and water as precursors at room temperature. By utilizing bifunctional trichlorosilane precursors, films of SiOC can be deposited in a layer-by-layer manner, wherein a water co-reactant circumvents the need for plasma, high temperatures ...
DOI:
10.1021/acsami.8b06057

18. Multi-scale and multi-technique analysis of the thermal degradation of poly(ether ether ketone)

Author:
Emilie Courvoisier; Yoann Bicaba; Xavier Colin
Source:
Polymer degradation and stability 2018 v.151 pp. 65-79
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; absorption; annealing; chemical bonding; crosslinking; crystal structure; differential scanning calorimetry; endothermy; melting; modulus of elasticity; oxidation; oxygen; phenol; temperature; thermal degradation
Abstract:
... The thermal degradation of PEEK has been studied in rubbery state in wide ranges of temperature (between 180 and 320 °C) and oxygen partial pressure (between 0.21 and 50 bars). On one hand, the thermal ageing mechanisms have been analysed and elucidated by FTIR spectrophotometry and by differential scanning calorimetry (DSC) on sufficiently thin PEEK films (between 10 and 60 μm thickness) to be to ...
DOI:
10.1016/j.polymdegradstab.2018.03.001

19. N-doping effectively enhances the adsorption capacity of biochar for heavy metal ions from aqueous solution

Author:
Wenchao Yu; Fei Lian; Guannan Cui; Zhongqi Liu
Source:
Chemosphere 2018 v.193 pp. 8-16
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; ammonia; annealing; aqueous solutions; biochar; cadmium; carbon; copper; heavy metals; metal ions; nitrogen content; straw; temperature
Abstract:
... N-doping was successfully employed to improve the adsorption capacity of biochar (BC) for Cu²⁺ and Cd²⁺ by direct annealing of crop straws in NH₃. The surface N content of BC increased more than 20 times by N-doping; meanwhile the content of oxidized-N was gradually diminished but graphitic-N was formed and increased with increasing annealing temperature and duration time. After N-doping, a high g ...
DOI:
10.1016/j.chemosphere.2017.10.134

20. Partial discharge behaviour of biaxially orientated PET films: The effect of crystalline morphology

Author:
Rong Tang; John J. Liggat; Wah H. Siew
Source:
Polymer degradation and stability 2018 v.155 pp. 122-129
ISSN:
0141-3910
Subject:
Fourier transform infrared spectroscopy; annealing; barium sulfate; crystal structure; differential scanning calorimetry; photovoltaic cells; plant propagation; reflectance; reflectance spectroscopy; temperature
Abstract:
... The relationship between partial discharge (PD) induced breakdown behaviour and the crystallinemorphology of PET films used in photovoltaic devices has been explored and discussed in this work for the first time. Biaxially orientated PET films with and without BaSO₄ filler were isothermally annealed at various temperatures before PD breakdown tests of the films to investigate the effect of crystal ...
DOI:
10.1016/j.polymdegradstab.2018.07.009