By wp_update-1701710083
Researchers Develop Method To Measure Positions Of Atomic Sites With New Precision
Using a progressive magnifier and new ways in image process, a multi-institutional team of researchers has devised an imaginative thanks to live the positions of single atomic sites in materials a lot of exactly than ever before.
In a paper revealed Gregorian calendar month eleven, 2014 within the journal Nature Communications, the team incontestable the flexibility to find atoms in high-resolution pictures of materials to raised than one picometre, or one percent of a micromillimetre. that’s quite 5 times higher than previous imaging ways. [1]
A local Bayesian optimizer for atomic structures
A local optimisation methodology supported theorem mathematician Processes is developed and applied to atomic structures. the tactic is applied to a range of systems together with molecules, clusters, bulk materials, and molecules at surfaces. The approach is seen to check favourably to plain optimisation algorithms like conjugate gradient or BFGS altogether cases. [2]
Efficient and reliable surface charge transfer doping of black phosphorus via atomic layer deposited MgO toward high performance complementary circuits
Black phosphorus (BP), a quick rising second material, has shown nice potential in future natural philosophy and optoelectronics attributable to its outstanding properties together with sizable band gap and ambipolar transport characteristic. However, its hole conductivity dominance, featured by a far larger hole quality and corresponding on-current than the negatron aspect, renders the reliable modulation of its carrier sort and density a key challenge, thereby clogging its application to complementary natural philosophy. Here, we tend to demonstrate associate economical and reliable n-type doping for BP transistors via surface functionalization by atomic layer deposited magnesia (MgO) with favorable controllability. [3]
Performance and in situ FTIR evaluation of Pt‐Sn/C Electrocatalysts with several Pt:Sn Atomic Ratios for the Ethanol Oxidation Reaction (EOR) in Acid Media
Pt‐Sn/C electrocatalysts with nominal Pt:Sn atomic ratios of 1:1, 2:1 and 3:1 were synthesized by the polyol methodology. the results of the atomic ratios on their chemical process activity for the fermentation alcohol oxidization Reaction (EOR) in acid media was evaluated and compared to a Pt/C electrocatalyst obtained by identical procedure. The variations in reaction mechanism between the alloys and Pt/C were elucidated by in place FTIR measurements. XRD characterization of the Pt‐Sn/C electrocatalysts showed a degree of alloying ranging between 27 and 54 % (from Vegard’s law), whereas crystal sizes about to two.2 nm were determined with the Scherrer equation. [4]
Atomic Absorption Spectrometric Determination of Some Heavy Metals from the Leaves of Moringa stenopetala Grown in Gamo Gofa Zone, Ethiopia
The plant Moringa (Moringa stenopetala), eaten up as a vegetable, could be a vascular plant cultivated within the southern a part of Ethiopia. it’s endemic to Ethiopia, distributed within the lowland ecology of the country. this study was conducted with the target of analyzing some trace gold-bearing contents (Fe, Cr, atomic number 82 and Cu) within the leaves of Moringa plant and to spot their levels. [5]
Reference
[1] Researchers Develop Method To Measure Positions Of Atomic Sites With New Precision
June 12, 2014 (web link)
[2] A local Bayesian optimizer for atomic structures
del Río EG, Mortensen JJ, Jacobsen KW. A local Bayesian optimizer for atomic structures. arXiv preprint arXiv:1808.08588. 2018 Aug 26. (Web link)
[3] Efficient and reliable surface charge transfer doping of black phosphorus via atomic layer deposited MgO toward high performance complementary circuits
Liao W, Lin WA, Chen L, Wei W, Zeng Z, Feng X, Huang L, Tan WC, Huang X, Ang KW, Zhu CX. Efficient and reliable surface charge transfer doping of black phosphorus via atomic layer deposited MgO toward high performance complementary circuits. Nanoscale. 2018 Aug 28. (Web link)
[4] Performance and in situ FTIR evaluation of Pt‐Sn/C Electrocatalysts with several Pt:Sn Atomic Ratios for the Ethanol Oxidation Reaction (EOR) in Acid Media
González-Quijano D, Pech-Rodríguez WJ, González-Quijano JA, Escalante-García JI, Morais C, Napporn TW, Rodiguez-Varela FJ. Performance and in situ FTIR evaluation of Pt‐Sn/C Electrocatalysts with several Pt: Sn Atomic Ratios for the Ethanol Oxidation Reaction (EOR) in Acid Media. ChemElectroChem. (Web link)
[5] Atomic Absorption Spectrometric Determination of Some Heavy Metals from the Leaves of Moringa stenopetala Grown in Gamo Gofa Zone, Ethiopia