406 research outputs found
sj-pdf-1-trj-10.1177_00405175211050540 - Supplemental material for The effects of preloading on tensile properties of braided polyarylate fiber ropes
No full textSupplemental material, sj-pdf-1-trj-10.1177_00405175211050540 for The effects of preloading on tensile properties of braided polyarylate fiber ropes by Xu Ding, Ying Sun, Chunhui Dong, Mengwei Guo and Li Chen in Textile Research Journal</p
sj-docx-1-tct-10.1177_15330338211045198 - Supplemental material for Pure and Mixed Tubular Carcinoma of the Breast: Mammographic Features, Clinicopathological Characteristics and Prognostic Analysis
No full textSupplemental material, sj-docx-1-tct-10.1177_15330338211045198 for Pure and Mixed Tubular Carcinoma of the Breast: Mammographic Features, Clinicopathological Characteristics and Prognostic Analysis by Chanjuan Wen, Weimin Xu, Genggeng Qin, Hui Zeng, Zilong He, Sina Wang, Zeyuan Xu, Mengwei Ma, Zhendong Luo and Weiguo Chen in Technology in Cancer Research & Treatment</p
Flow of ionic liquids in nanoconfinement
No full textMade available in DSpace on 2022-01-12T22:35:11Z (GMT). No. of bitstreams: 3
HAN-DISSERTATION-2021.pdf: 47709206 bytes, checksum: e901b50d13d22bafa2633b7c68efcd70 (MD5)
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Previous issue date: 2021-07-14Embargo set by: Seth Robbins for item 121101
Lift date: 2024-01-12T22:35:30Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemIonic liquids (ILs) are considered well suited alternatives for conventional electrolytes in next-generation electrochemical devices to grant enhanced stability, safer handling and improved performance. Key to ILs’ application as electrolytes are the structure and transport properties near the solid-liquid interface and in nanopores, as most electrochemical processes take place at the electrolyte-electrode interface and mesoporous electrode materials are often adopted to maximize specific area. Unlike dilute electrolyte, which is well characterized by the Debye–Hückel equation and electrical double layer (EDL) model, the understanding of ILs (and concentrated electrolytes in general) near the solid-liquid interface and under confinement is still primitive and sometimes self-conflicting, especially in regards of the unequilibrated processes. The dissertation summarizes my attempts to elucidate on ionic liquids (ILs)’ interfacial structures, the kinetics in the formation of such structures, the flow properties and relaxation kinetics, through nanomechanical measurements. Experimental evidence is contributed to answering to three key questions pivoted around the theme: 1) how do ions arrange themselves within in the last tens of nm from a charged solid-IL interface; 2) how do ILs flow or relax in confined space only a few times the dimension of ions; and 3) how will water affect the flow of nanoconfined ILs.
Specifically, the interfacial region between IL and a charged surface is investigated with surface forces apparatus (SFA) using the classic mica sensors. The nanostructures of and the interactions within the interfacial region are revealed by the surface force profile as a function of separation between the two opposing mica surfaces. Time-dependent measurements revealed an ultra-slow kinetics in the formation of the structure, which is concerted with a transition in the bulk nanostructure studied with X-ray. Rheological properties of the nanoconfined ILs are measured by either squeezing out the ILs as the opposing mica surfaces approach each in the normal direction, or laterally oscillating one of the mica surfaces to create shear motions. Finally, water is introduced through gas phase by modulating the relative humidity in the sealed chamber to probe its influence.
It is discovered that the long-ranged repulsive surface force across a range of a few tens of nanometers could be due to the presence of multi-ionic structures intrinsic to each IL, while the step-like features at below 10 nm region suggest the presence of multiple layers immediately on the solid surface. Such layers, upon adequate normal force, are squeezed out sequentially with increasing force thresholds. The squeeze-out processes are modelled with Reynold’s law of lubrication to extract the effective viscosity for each layer, which is found to increase by orders of magnitude in the next resolvable layer compared to the previous one. The effective viscosity obtained from squeeze-out is further studied by taking into account the influence of multiple parameters including the long-ranged screening length, the bulk viscosity and the degree of confinement. Further study through oscillatory shear motion asserted on the confined ILs deconvolutes the viscous and elastic moduli of the ILs in each layer. Through modeling the storage and loss moduli with Einstein Stokes law and the effective shear viscosity as a function of shear rate by Eyring’s theory, the collective motion of ions under confinement is unveiled and discussed regarding to the chemical structures of the ions. The compressibility of the ions is found to be the key. When water is introduced, the interfacial structures, the effective viscosity, and the moduli are clearly altered, despite its low abundance. The intrusion of water into the nanoconfined ILs is investigated separately in static measurements. The dissertation extends the scope of IL nanorheology to address the application of IL as a lubricant and comments on the link between the nanorheology and nanotribology of ILs, and the influence of water.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-08-01The student, Mengwei Han, accepted the attached license on 2021-07-12 at 10:29.The student, Mengwei Han, submitted this Dissertation for approval on 2021-07-12 at 20:46.This Dissertation was approved for publication on 2021-07-14 at 09:31.DSpace SAF Submission Ingestion Package generated from Vireo submission #16861 on 2022-01-12 at 12:54:31Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Onl
Fundamentals, Applications, and Future Directions of Bioelectrocatalysis
No full textBioelectrocatalysis is an interdisciplinary research field combining bio-catalysis and electrocatalysis via the utilization of materials derived from biological systems as catalysts to catalyze the redox reactions occurring at an electrode. Bioelectrocatalysis synergistically couples the merits of both biocatalysis and electrocatalysis. The advantages of biocatalysis include high activity, high selectivity, wide substrate scope, and mild reaction conditions. The advantages of electrocatalysis include the possible utilization of renewable electricity as an electron source and high energy conversion efficiency. These properties are integrated to achieve selective biosensing, efficient energy conversion, and the production of
diverse products. This review seeks to systematically and comprehensively detail the fundamentals, analyze the existing problems, summarize the development status and applications, and look toward the future development directions of bioelectrocatalysis. First, the structure, function, and modification of bioelectrocatalysts are discussed. Second, the essentials of bioelectrocatalytic systems, including electron transfer mechanisms, electrode materials, and reaction medium, are described. Third, the application of bioelectrocatalysis in the fields of biosensors, fuel cells, solar cells, catalytic mechanism studies, and bioelectrosyntheses of high-value chemicals are systematically summarized. Finally, future developments and a perspective on bioelectrocatalysis are suggested
Design of High Performance Image Acquisition and Processing Platform Based on DSP and FPGA
No full textARTISTIC UNIQUENESS OF M.A. BULGAKOV’S “A YOUNG DOCTOR’S NOTEBOOK”
No full textThe article thoroughly describes the artistic uniqueness of M.A. Bulgakov’s one of the earliest works - “A young doctor’s notebook”. These series were inspired by writer’s own experience working as a country doctor in Nikolskoe. Seven stories are united not only by the narrator’s personality, but also by the time and place of the action. The single storyline, which connects all the stories, is the fate of a young doctor in a collision with the harsh historical reality. Bulgakov filled his short stories with different strokes, which are fragments of the medical practice for recently graduated young doctor. These fragments were able to create the whole vision of life for the intellectual hero living in a small village during the Revolution. The mosaic, multifaceted composition of works are some of the early characteristics attributed to the author
Cedarwood Bark-Derived Hard Carbon as an Anode for High-Performance Sodium-Ion Batteries
No full textCPT-TODIM method for interval neutrosophic MAGDM and its application to third-party logistics service providers selection
No full textThe multiple attribute group decision making (MAGDM) has always been a concern in the research field. In this article, we establish the interval neutrosophic TODIM method based on cumulative prospect theory (CPT-IN-TODIM) for MAGDM issue. This new developed CPTIN-TODIM method has markedly superiority in describing decision maker’s psychological states, which utilizes the weight function to adjust weighting attributes distinguishing from the classical TODIM method. Then, this new developed method has been applied to select the third-party logistics service providers and been expound on the disparity with existing methods. Finally, the results of contrastive analysis indicate that this new developed method can lead to the appropriate conclusion and sticks out the differences between alternatives to provide clearer direction. Hence, the new developed CPT-IN-TODIM method is reliable and valid.
First published online 19 November 202
Hermetic Packaging Based on Cu–Sn and Au–Au Dual Bonding for High-Temperature Graphene Pressure Sensor
No full textA chip-level hermetic package for a high-temperature graphene pressure sensor was investigated. The silicon cap, chip and substrate were stacked by Cu–Sn and Au–Au bonding to enable wide-range measurements while guaranteeing a high hermetic package. Prior to bonding, the sample was treated with Ar (5% H(2)) plasma. The Cu–Sn bonding was firstly performed at 260 °C for 15 min with a pressure of 9.9 MPa, and the corresponding process conditions for Au–Au bonding has increased to 300 °C, 20 min and 19.8 MPa respectively. The average shearing strength was 14.3 MPa, and an excellent leak rate of 1.72 × 10(−4) Pa·cm(3)/s was also achieved. After high-temperature storage (HTS) at 350 °C for 10 h, the resistance of graphene decreased slightly because the dual bonding provided oxygen-free environment for graphene. The leakage rate of the device slightly increased to 2.1 × 10(−4) Pa·cm(3)/s, and the average shear strength just decreased to 13.5 MPa. Finally, under the pressure range of 0–100 MPa, the graphene pressure sensor exhibited a high average sensitivity of 3.11 Ω/MPa. In conclusion, the dual bonding that combined Cu–Sn and Au–Au is extremely suitable for hermetic packaging in high-temperature graphene pressure sensors
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