المؤلفون: MingYang Wei, Jie Lian, Yu Zhang, ChenLin Wang, Yueming Wang, Zhen Xu

المصدر: npj 2D Materials and Applications, Vol 6, Iss 1, Pp 1-8 (2022)

مصطلحات موضوعية: Chemistry, Mechanics of Materials, Mechanical Engineering, TA401-492, General Materials Science, General Chemistry, Condensed Matter Physics, Materials of engineering and construction. Mechanics of materials, QD1-999

الوصف: Palladium diselenide (PdSe2), a new type of two-dimensional noble metal dihalides (NMDCs), has received widespread attention for its excellent electrical and optoelectronic properties. Herein, high-quality continuous centimeter-scale PdSe2 films with layers in the range of 3L–15L were grown using Chemical Vapor Deposition (CVD) method. The absorption spectra and DFT calculations revealed that the bandgap of the PdSe2 films decreased with the increasing number of layers, which is due to the enhancement of orbital hybridization. Spectroscopic ellipsometry (SE) analysis shows that PdSe2 has significant layer-dependent optical and dielectric properties. This is mainly due to the unique strong exciton effect of the thin PdSe2 film in the UV band. In particular, the effect of temperature on the optical properties of PdSe2 films was also observed, and the thermo-optical coefficients of PdSe2 films with the different number of layers were calculated. This study provides fundamental guidance for the fabrication and optimization of PdSe2-based optoelectronic devices.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::000e5207679a1746e8ce61a63ca4bb71Test
https://doaj.org/article/edf649102fa94d578c09ff3babbb311fTest

المؤلفون: Liang Gong, Siyi Li, Jie Lian

المصدر: International Journal of Robust and Nonlinear Control. 32:164-180

مصطلحات موضوعية: Control and Systems Engineering, Computer science, Mechanical Engineering, General Chemical Engineering, Biomedical Engineering, Aerospace Engineering, Electrical and Electronic Engineering, Hidden Markov model, Algorithm, Industrial and Manufacturing Engineering, Markov jump

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::8fc1a005ed758c68b8ffb975ec636ca4Test
https://doi.org/10.1002/rnc.5824Test

المؤلفون: Jie Lian, Can Li

المصدر: International Journal of Robust and Nonlinear Control. 31:4154-4169

مصطلحات موضوعية: Nonlinear system, Control and Systems Engineering, Control theory, Computer science, Mechanical Engineering, General Chemical Engineering, Biomedical Engineering, Aerospace Engineering, Electrical and Electronic Engineering, Adaptive tracking, Control (linguistics), Industrial and Manufacturing Engineering, Event triggered

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::b9a8cb3f0c3dc9046de0f50e0a28119fTest
https://doi.org/10.1002/rnc.5470Test

المؤلفون: Wen Zhang, Min-jie Lian, Cai-wu Lu, Di Liu

المصدر: International Journal of Minerals, Metallurgy and Materials. 27:1036-1045

مصطلحات موضوعية: Tailings dam, Materials science, Moisture, Capillary action, Mechanical Engineering, 0211 other engineering and technologies, Metals and Alloys, 02 engineering and technology, Wetting front, 021001 nanoscience & nanotechnology, Geochemistry and Petrology, Mechanics of Materials, Materials Chemistry, Barrier effect, Capillary water, Composite material, 0210 nano-technology, Saturation (chemistry), Water content, 021102 mining & metallurgy

الوصف: Small-particle interlayers (lenticles) show some characteristic hydraulic properties and can affect the movement of unsaturated water. In this study, we developed a novel online capillary-water-absorption monitoring device and conducted three groups of comparison tests to simulate lenticle positions and thicknesses with respect to the capillary rise. The results show that the characteristic wetting front exhibits a fast rise in the early stage, a slow rise in the middle stage, and stability in the later stage. The motion of the capillary water in the lenticle is mainly transversal, with the upward curve being “flat,” and the longer is “flat,” the longer is the time needed for the water to move. The interlayer can form a capillary stagnation zone with moisture content close to saturation. The high interlayer may form a discontinuous corrugated capillary zone. Thus, when the wetting front reaches the “coarse-grain (lower)-fine-grain (upper)” interface, the “anti-capillary barrier effect” results in more moisture in the upper layer. Thus, when the wetting front of the capillary water reaches the “fine-grain (upper)-coarse-grain (lower)” interface, the “capillary barrier effect” causes the moisture content of the upper tailings to decreases sharply because of the horizontal movement of the water in the fine medium. It is clear that the presence of lenticles can retard the rise of capillary water by storing water.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::d65efe7817eda6c27db907523b605c78Test
https://doi.org/10.1007/s12613-020-1963-xTest

المؤلفون: Jie Lian, Stéphane Gin, Tianshu Li, Gopal B. Viswanathan, Tiankai Yao, Gerald S. Frankel, John D. Vienna, Xiaolei Guo, Penghui Lei, Jincheng Du, Seong H. Kim, Daniel K. Schreiber, Hongshen Liu, Dien Ngo, Joseph V. Ryan

المصدر: Nature Materials. 19:310-316

مصطلحات موضوعية: Waste management, Mechanical Engineering, Radioactive waste, 02 engineering and technology, General Chemistry, Solution chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Corrosion, Mechanics of Materials, visual_art, Service life, visual_art.visual_art_medium, Environmental science, General Materials Science, Ceramic, 0210 nano-technology

الوصف: The US plan for high-level nuclear waste includes the immobilization of long-lived radionuclides in glass or ceramic waste forms in stainless-steel canisters for disposal in deep geological repositories. Here we report that, under simulated repository conditions, corrosion could be significantly accelerated at the interfaces of different barrier materials, which has not been considered in the current safety and performance assessment models. Severe localized corrosion was found at the interfaces between stainless steel and a model nuclear waste glass and between stainless steel and a ceramic waste form. The accelerated corrosion can be attributed to changes of solution chemistry and local acidity/alkalinity within a confined space, which significantly alter the corrosion of both the waste-form materials and the metallic canisters. The corrosion that is accelerated by the interface interaction between dissimilar materials could profoundly impact the service life of the nuclear waste packages, which, therefore, should be carefully considered when evaluating the performance of waste forms and their packages. Moreover, compatible barriers should be selected to further optimize the performance of the geological repository system. Immobilization of radionuclides in glass or ceramic forms in stainless steel in deep geological repositories is planned in the US for disposal of nuclear waste. Under simulated repository conditions, corrosion could be significantly accelerated at the interfaces of different barrier materials.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::630a8100786354fe7332111909b152bbTest
https://doi.org/10.1038/s41563-019-0579-xTest

المؤلفون: Jie Lian, Can Li

المصدر: International Journal of Robust and Nonlinear Control. 30:1679-1695

مصطلحات موضوعية: Nonlinear system, Control and Systems Engineering, Control theory, Computer science, Mechanical Engineering, General Chemical Engineering, Quantization (signal processing), Biomedical Engineering, Aerospace Engineering, Electrical and Electronic Engineering, Industrial and Manufacturing Engineering

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::17d3280c7f8bb0419bb69c53f277dac7Test
https://doi.org/10.1002/rnc.4847Test

المؤلفون: Jiaxiong Fang, Wei Hu, Haonan Song, Kai Dai, Jie Lian, Kui Jin, Yujun Shi, Ge He, Yuxiang Liu

المصدر: Journal of Alloys and Compounds. 788:891-896

مصطلحات موضوعية: Diffraction, Materials science, Valence (chemistry), Band gap, Mechanical Engineering, Metals and Alloys, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Spectral line, 0104 chemical sciences, Ion, Condensed Matter::Materials Science, Lattice constant, X-ray photoelectron spectroscopy, Mechanics of Materials, Lattice (order), Materials Chemistry, 0210 nano-technology

الوصف: As an accurate technique, spectroscopic ellipsometry (SE) is utilized to study the dielectric function (e = er + iei) of spinel oxide MgTi2O4 (MTO) thin films with good orientation. C-axis lattice length and Ti ions valence state are characterized by X-ray diffraction and X-ray photoelectron spectroscopy, respectively. Here, we find that c-axis lattice constants have the positive correlation with band gaps which are obtained by fitting the spectra of d 2 ( E 2 e i ) / d E 2 via standard critical points model in MTO, and this phenomenon can be revealed by the Ti ions valence state. Moreover, the band gap value of MTO measured by experiment is consistent with the result of first-principles calculations.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::3fc8de84ab47411005fb7f9d4aabc40bTest
https://doi.org/10.1016/j.jallcom.2019.02.261Test

المؤلفون: Thanh Nhut Do, Howe-Siang Tan, Jie Lian, Cheng Zhang, Yinthai Chan, Xuanwei Ong

المساهمون: School of Physical and Mathematical Sciences

المصدر: MRS Advances. 4:1-7

مصطلحات موضوعية: Nanostructure, Materials science, Physics::Optics, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Electron spectroscopy, Molecular physics, Spectral line, Nanomaterials, Condensed Matter::Materials Science, Correlation function, Chemistry [Science], General Materials Science, Diffusion (business), Spectroscopy, Condensed Matter::Other, Mechanical Engineering, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Mechanics of Materials, Quantum dot, 0210 nano-technology, Ultrashort pulse

الوصف: We use ultrafast coherent two-dimensional electronic spectroscopy (2DES) to study the ultrafast spectral diffusion dynamics of colloidal CdSe quantum dots (QDs) and CdSe nanoplatelets (NPLs). The Center Line Slope (CLS) and Nodal Line Slope (NLS) techniques were employed to analyse the 2DES spectra. We show that no spectral diffusion dynamics occurs for the CdSe QDs. On the other hand, spectral diffusion was observed in the CdSe 5 mono-layers NPLs heavy-hole transition. The normalized Frequency Fluctuation Correlation Function (FFCF) of the CdSe NPLs heavy-hole transition was measured to have a major fast decay component at 140 fs. Ministry of Education (MOE) Accepted version This work is supported by a grant from the Singapore Ministry of Education Tier 2 Academic Research Fund (MOE2015-T2-1-039).

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0c616e780283a24f944e2ce0ebd99beTest
https://doi.org/10.1557/adv.2019.38Test

المؤلفون: Shaofei Zhu, Tiankai Yao, Sumit Bhattacharya, Abdellatif M. Yacout, Kun Mo, Yinbin Miao, Jie Lian, Aaron Oaks

المصدر: Scripta Materialia. 155:169-174

مصطلحات موضوعية: 010302 applied physics, Materials science, Misorientation, Mechanical Engineering, Metals and Alloys, Analytical chemistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, 01 natural sciences, Grain size, law.invention, Mechanics of Materials, Transmission electron microscopy, law, 0103 physical sciences, Microscopy, General Materials Science, Grain boundary, Irradiation, Crystallization, 0210 nano-technology

الوصف: Advanced microstructure investigations of the high-burnup structure (HBS) in UO2 produced by high-dose 84 MeV Xe ion irradiation are reported. Spark plasma sintered micro-grained UO2 was irradiated to 1357 dpa at 350 °C. The characteristic nano-grains and micro-pores of the HBS were formed. The grain size and grain boundary misorientation distributions of the HBS were measured using transmission electron microscopy based orientation imaging microscopy. Grain polygonization due to accumulation of radiation-induced dislocations was found to be the mechanism of nano-crystallization. The morphology of Xe bubbles was quantitatively investigated. This study provides crucial references for advanced fuel performance modeling of high-burnup UO2.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::cfd8bd35a90dd87813f1b6d99f870dbcTest
https://doi.org/10.1016/j.scriptamat.2018.04.006Test

المؤلفون: Haonan Song, Kai Dai, Jie Lian, Yujun Shi, Yuxiang Liu

المصدر: Journal of Alloys and Compounds. 756:57-61

مصطلحات موضوعية: Materials science, Mechanical Engineering, Metals and Alloys, 02 engineering and technology, Dielectric, 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Molecular electronic transition, Ion, Bond length, Metal, Mechanics of Materials, visual_art, 0103 physical sciences, Materials Chemistry, Density of states, visual_art.visual_art_medium, Density functional theory, 010306 general physics, 0210 nano-technology

الوصف: Based on the density functional theory (DFT) method, we theoretically studied the novel optical properties of Mg 2-x Ti 1+x O 4 (x = 0, 0.25, 0.5, 0.75) through the first-principles calculations. Electronic structures including bond lengths, band structures and density of states (DOS) were calculated to characterize the optical properties. In fact, Mg 2-x Ti 1+x O 4 's optical properties are dominated by the electronic interband transitions between Ti-3d and O-2p states, and this electronic transition is directly related to the intensity of the Ti-O hybridization. With Mg ions replaced by Ti ions, Mg 2-x Ti 1+x O 4 transfers from insulator to metal, and the Ti-O bond lengths become longer which implies the Ti-O hybridization becomes weaker. As a result, dielectric peaks and absorption peaks both move to the higher energy region (blue shifts) upon the number of substituted Mg ions increasing.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::071c5fda82506455663a256342d60b31Test
https://doi.org/10.1016/j.jallcom.2018.05.032Test