Results 81 to 90 of about 7,995 (229)

Structural characteristics of carbon fiber with ultrahigh tensile strength and high modulus

Materials Research Express
To shed light for production of carbon fibers with even better tensile properties, the structure of carbon fiber with ultrahigh tensile strength and high modulus was investigated and compared with M40J using SEM, Raman, XRD and TEM.
Xiaoxue Feng, Shuang Li, Yu Wang, Aijun Gao, Yuanjian Tong   +4 more
doaj   +1 more source

Rounded Monodisperse Fluorescent Nanodiamonds

Small, EarlyView.
Nanodiamond (ND) shape control using rapid molten‐nitrate etching is studied as a scale‐up method for monodispersed rounded particles. Optimal etching condition (567°C for 6 min) yields NDs with atomically stepped surfaces and reduced sp2 content. Compared to angular control, rounded NDs exhibit an increased proportion of luminescent particles (66% vs.
Helena Raabova, Ivan Rehor, Jan Havlik, Stuart Turner, Jan Stursa, Vladimira Petrakova, Michal Gulka, Petr Cigler   +7 more
wiley   +1 more source

Ultrasensitive Detection of Neurofilament Light in Plasma Using F(Ab’)2‐Modified Graphene Field‐Effect Biosensor

Small, EarlyView.
An antibody fragment (F(ab')2)‐modified graphene field‐effect transistor biosensor is developed for the ultrasensitive detection of neurofilament light chain in clinical plasma. By reducing the Debye screening effect, the platform achieves a 114% sensitivity increase and a fivefold lower detection limit compared to whole‐antibody approaches ...
Selvinaz Burcu Kizilates, Rica Asrosa, Lenart Senicar, Anuja Sharma, Seda Gungordu Er, Nisha Naeem, Ahmad Nizamuddin bin Muhammad Mustafa, Yang Wu, Neil Graham, Amanda Heslegrave, Mohan Edirisinghe, Antonio Lombardo, Elias Torres, Henrik Zetterberg, Sami Ramadan, David J. Sharp, Bing Li   +16 more
wiley   +1 more source

Crystal Structures and Magnetic Properties of Coordination Polymer Complexes of Metal Ions With Kojic Acid Ligands

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
One‐dimensional coordination polymers of Cu(II) and Co(II) with kojic acid show distinct chain connectivities revealed by X ray crystallography and exhibit extremely weak magnetic interactions, as supported by magnetic measurements and molecular orbital calculations. The crystal structures and magnetic properties of coordination complexes [Cu(C6H5O4)2]
Wataru Fujita, Tomoko Yamaguchi
wiley   +1 more source

Synthesis and Structure Solution of Ba[SeCN]2

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
The new quasi‐binary selenocyanate Ba[SeCN]2 was synthesized by the reaction of barium hydroxide with ammonium selenocyanate. Its crystal structure was determined from powder X‐ray diffraction (PXRD) data. Additionally, density functional theory (DFT) analysis and Raman spectroscopy were performed.
Alena Shlyaykher, Artem Shevchenko, Anna C. Booth, Robert E. Dinnebier, Frank Tambornino   +4 more
wiley   +1 more source

Secondary transformations in the structure of grey cast iron

Литьë и металлургия
A nanostructural mechanism of secondary transformations in the structure of gray cast iron is proposed. First, structureforming nanocrystals of austenite, ferrite, cementite and graphite are formed from elementary nanocrystals of iron and graphite, free ...
E. I. Marukovich, V. Yu. Stetsenko, A. V. Stetsenko   +2 more
doaj   +1 more source

Synchrotron beamline setup enabling quasi‐simultaneous PXRD and XANES measurements: case study of Fischer–Tropsch catalyst reduction at 60 bar

Journal of Synchrotron Radiation, EarlyView.
This paper presents a beamline setup that allows the combination of in situ powder X‐ray diffraction (PXRD) and X‐ray absorption near‐edge structure (XANES) measurements within a single experimental cycle to investigate cobalt catalyst structures and properties under real conditions.Powder X‐ray diffraction (PXRD) and X‐ray absorption near‐edge ...
Lipeng Yao, G. Leendert Bezemer, Irene. M. N. Groot, Oleg Konovalov, Maciej Jankowski   +4 more
wiley   +1 more source

THE THERMODYNAMIC ANALYSIS OF CONDITIONS OF DISSIPATIVE PHASES OCCURRENCE AT INTERACTION OF INTERMETALLIC COMPOUNDS MICROCRYSTALS [PDF]

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2011
Conditions of occurrence during diffusion interaction between intermetallic compounds the phases which are absent on the phase equilibrium diagram of binary system is received by methods of nonequilibrium nonlinear thermodynamics.
V.V. Zhigunov, A.A. Alehina
doaj  

THE EFFECT OF SIZE FACTOR ON THE PHASE TRANSITION IN Sn₂P₂S₆ CRYSTALS: EXPERIMENTAL DATA AND SIMULATION IN ANNNI MODEL

Condensed Matter Physics, 2003
Size effect on the fundamental properties of Sn2P2S6 ferroelectric is studied. The decrease of Raman peak frequency, accompanied by the band broadening and asymmetry, is observed in the spectra of microcrystalline Sn2P2S6 powder. Theoretical calculations,
A.V.Drobnich, A.A.Molnar, A.V.Gomonnai, Vysochanskii, I.P.Prits   +4 more
doaj   +1 more source

Microcrystals and quasicrystals : how to construct microcrystals with mean perfect quasicrystalline symmetry

Journal de Physique I, 1991
It is shown how the construction of “interwinning” elucidates the relationship between quasicrystals and microcrystals in phase transitions as observed in recent experiments. Both the diffraction patterns and the domain geometry are studied simultaneously. The splitting of the diffraction peaks in the phase transition can be calculated.
openaire   +2 more sources