bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improved Responsivity of ZnO Nanowires Ultraviolet Photodetector by Light Trapping Effect
Authors: Wang Nan , Jiang Dayong 
Published: January 2021

Abstract
The absorbability of ZnO planar thin layer is weak because of the short transmission path of incident light. The light trapping effect of ZnO UV PDs has been established as a promising method to optimize the performance of optoelectronic devices. By measuring the optical transmission and photocurrent of the ZnO PDs, we demonstrate that the ordered ZnO NWs increases the optical responsivity. In addition, when the photodetector was connected to nanowires, the responsivity is increased by a factor of 102, accompanied by a large light dark current ratio (105). ZnO nanowires with light trapping effect provide a new perspective for the research of ultraviolet irradiation nanomaterials.
Research on the stability of flexible devices
Authors: Sun Jiamei , Jiang Dayong , Wang Hepeng , Wang Meijiao 
Published: January 2021

AbstractSince the flexible substrates are all organic plastics, the main problem in the manufacture of flexible devices is the mismatch and low adhesion between inorganic semiconductor crystals and organic plastics, so the detection stability under mechanical stress is an important factor affecting the performance of flexible ultraviolet (UV) photodetectors (PDs). In order to improve the detection stability of flexible UV PD, the substrates of polyethylene terephthalate (PET) and polyimide (PI) are used as flexible devices respectively for comparative study, and the growth material is selected with the piezoelectric effect ZnO-based material as the main research object. It is found that the ZnO film with AlZnO (AZO) buffer layer on the PI substrate has almost no cracks or peeling off. In addition, after 100 times of bending tests on PI substrate devices, although the detection performance is reduced compared with the detection performance before bending, it still maintains relatively high detection stability.
Improved Dielectric Properties of Polypropylene Nanocomposites with BaTiO3 Nanoparticles
Authors: Dai Xiying , Xing Zhaoling , Xiao Yu , Yang Wei , Zhang Chong , Zhou Jianjun 
Published: January 2021

Abstract
Polymer nanocomposites with improved dielectric permittivity are extremely desirable for the power capacitors. With the existing capacitor polypropylene (PP) film as the substrate, the surface of PP film is coated with a layer of BaTiO3 (BT) with high dielectric constant of nanoparticles. Through the BT layer with high dielectric constant, the dielectric constant of the whole composite dielectric film is improved, and the dielectric loss is controlled at a relatively low level. The organic solvent system of BT paste coating and water system of BT paste coating research were prepared. Two kind of composite dielectric films which are PP/PVDF/BT and PP/BT were prepared by coating. The permittivity of PP/ BT nano-composites with 50 wt% fillers at 1000 Hz was up to 4.49, which was nearly 2 times higher than that of pure PP film. According to the method, a pilot experiment was carried out. The strategy could be extended to a variety of inorganic fillers to improve the dielectric properties of polymer nano- composites for power capacitors.
In-situ study of the fracture behavior of SiCf/SiC composite material under three-point bending
Authors: Zheng Zhanguang , Peng Yongbing , Jiang Jishen , Ma Xianfeng , Jin Enze , Chen Haikun , Fang Zehua 
Published: January 2021

Abstract
The mechanical properties and fracture behavior of a SiCf/SiC composite material were studied by in-situ three-point bending testing. The deformation and cracking behavior of SiCf/SiC composite material was captured by the equipped scanning electron microscope. The experimental results indicate that the fracture property was highly related to the microstructure of the matrix and the SiC fibres. The in-situ observation showed that the composite material exhibited complex crack initiation and propagation process under three-point bending. Vertical microcracks initiated at the root of the preset notch and propagated vertically till blocked by the horizontal fibers. Driven by the large loca stress, horizontal cracks were also found initiated adjacent to the notch root and propagated horizontally along the interface between the fibers and the matrix.
Influence of Mg and Si content on infrared radiation performance of AP/HTPB system in each band
Authors: Shi Chengkuan , Ju Jian , Li Zejun , Guo Zefeng , Guan Hua 
Published: January 2021

Abstract
The limited effort in this paper is focused on studying the effects of different contents of high-energy additives on infrared radiation performance of AP/HTPB systems in each band. A Spectraline SC7000 imaging spectrometer was used to test the radiation performance of each band. The test results show that when the magnesium (Mg) content increases from 0 to 30%, the near-infrared radiation intensity is greatly increased. The near-infrared radiation energy increases from 19 to 125W/Sr by 558%, the mid-infrared radiation energy increases from 32 to 85W/Sr by 166%, and the far-infrared radiation energy increased from 9.4 to 12.8W/Sr by 36%.The ratio of θα/β/λ changed from 0.59:1:029 to 1.47:1:0.15. The increase of silicon (Si) content from 0 to 30% has a great contribution to the increase of the radiation intensity in the far-infrared band. The intensity of near-infrared radiation increased from 19 to 97W/Sr by 411 %, the energy of mid-infrared radiation increased from 32 to 64W/Sr by 82%, and the energy of far- infrared radiation increased from 9.4 to 40W/Sr by 326%. The ratio of θα/β/λ has changed from 0.59:1:0.29 to 1.52:1:0.63.
Study on the galvanic corrosion phenomenon of cladding steel bars
Authors: ping Tan Jian , Yang Zheng , Li Zhen 
Published: January 2021

Abstract
To explore corrosion law of bimetallic interface of a new type of steel bars, which cladded in stainless steel by hot rolling process, COMSOL Multiphysics electrochemical corrosion module, as a simulation tool, was used for studying the electrode potential distribution, current density distribution and electrode surface morphology change during the corrosion process at the reinforced bimetal bonding surface of cladding layer combining with the surface of the electrode potential distribution in the process of corrosion, the current density distribution and the electrode surface morphology change in bimetallic interface of our new type steel bars , at the same time use the salt fog corrosion, equipment corrosion test was carried out on the cladding steel, used to verify the accuracy of the simulation results. The results suggested that the coating electrode potential of stainless steel was obviously higher than that of carbon steel, in combination with surface constitute a pair of electrodes, the increased incidence of corrosion of carbon steel side and in the simulation and experiment are form a “V” corrosion pits, by measuring found that, in the condition of the mass fraction of 5% salt spray and 50 °C temperature, average surface cladding steel corrosion rate is 2.2 * 10 ^ (-3) mm/h.
Luminescence Properties by Li+-ion Modified Na4CaSi3O9: Dy3+ Phosphors
Authors: Tang He , Zhang Xiyan 
Published: January 2021

Abstract
A series of blue-green emitting Na4CaSi3O9: Dy3+, yLi+ (NCSO) phosphors were successfully prepared by high temperature solid state reaction. The phase formation was confirmed by X-ray powder diffraction measurement. The emission spectra of NSCO phosphors were investigated. With the increase of Dy3+ ion concentration, the luminescence intensity increases, the optimal doping concentration of Dy3+ is x=0.04, and then the luminescence intensity decreases due to non-radiative energy transfer. Li+ as a charge compensation agent, influences the luminescence properties of NCSO phosphors. By Li+ doping into lattice and replacing Ca2+ to form negative charge vacancies, which reduce the charge imbalance in the matrix and thus reducing the stress on the matrix lattice, making the lattice more complete and luminous intensity improved. The investigation shows that NCSO:0.04Dy3+, 0.10Li+ phosphor package UV-LED chip could realize white LED.
Mechanical and thermal properties of Polymer composites via the Synergistic effect of Carbon Nanotube and Ionic Liquid
Authors: Zhu Jiang , Ni Haitao , Xiang Wencai , Yang Heshan , Liu Hongpan , Liu Song , Luo Liu 
Published: January 2021

Abstract
A series of polymer composites based on Polypropylene (PP) are prepared by Multi- walled carbon nanotube (MWCNT) and ionic liquid (IL). The dispersion of MWCNT is investigated by FESEM measurements, and the tensile strength of composites are analyzed by tensile tests. The thermal properties of composites are also ameliorated by the results of differential scanning calorimetry (DSC) measurements.
Preparation and properties of resin-based wet friction materials reinforced by SiCp/basalt fiber cloth
Authors: Feng Chiyuan , Wen Guofu , Wang Xiufei , Yin Cailiu 
Published: January 2021

Abstract
A new type of wet friction material was prepared by solution impregnation with phenolic resin as binder, SiC particles and basalt fiber cloth as reinforcement.The hardness, density, porosity, microstructure, tribological properties and surface roughness were analyzed. The results show that the coefficient of friction (COF) and COF stability of the prepared material is more than 0.11 and 90%, respectively, while the wear rate is 0.26 × 10−7 cm3/J. The main wear pattern of this wet friction material is resin shedding. There is no large-sized “third body” abrasive debris on the friction surface, resulting in low wear rate of friction material.
Thermodynamic analysis of aniline adsorption on polyethylene terephthalate with polyethylene glycol
Authors: Zhou Zhaoyi , Sun Jiayi , Zhou Wei 
Published: January 2021

Abstract
Thermodynamic adsorption parameters of aniline monomer on polyethylene terephthalate (PET) with polyethylene glycol (PEG) were investigated. The standard affinity (-Δμ0
) decreased when the number of methylene in PEG increased testing from PEG200 to PEG800. According to the changes of the enthalpy (ΔH0
) and entropy (ΔS0
), it is found that the aniline molecules embedded into the PET substrates more strongly when adsorbed with lower molecular weight of PEG, but caused more randomness of the PET fibers. After polymerization, the PANI/PET fabric displayed favourable electrical conductivity and the surface specific conductivity (ρs
) reduced to 1.14 × 103Ω. However, the conductivity of PANI/PET fabric was reduced significantly because of the presence of PEG and lower concentration of adsorption solution.
Characterization of Retention/Loss Efficiency of Nanofibrillated Cellulose in Papermaking Process and Its Influence on Paper Properties
Authors: Du Peng , Zhao Chuanshan , Ding Qijun , Jiang Yifei , Han Wenjia , Li Xia 
Published: January 2021

Abstract
Nanofibrillated cellulose (NFC) is deemed to be environmentally friendly, green and inexhaustible material. Herein, Nanofibrillated cellulose (NFC) large length-diameter ratio were prepared by enzymatic pretreatment and mechanical method, and it was added into pulp as reinforcing agent to improve the performance of paper. The retention and loss efficiency of NFC in the paper preparation process were studied, and the retention and loss efficiency were characterized by analyzing the mechanical properties of the paper. It was found that the retention and loss efficiency of NFC decreased with the increase of NFC content. The addition of retention system in papermaking process has a positive effect on the retention efficiency of NFC. NFC can be uniformly distributed in the paper up to 8% with low addition. In addition, retention system can improve the mechanical properties of paper with high NFC content. Compared with the base paper, tensile strength, roughness, stiffness and air permeability of the paper increased by 111.38%, 100.95%, 152.63% and 96.80% respectively.
Revealing the autofluorescence properties of nanocellulose isolated from different raw materials by different methods
Authors: Ding Qijun , Zhang Ping 
Published: January 2021

Abstract
This work explored the autofluorescence properties of nanocellulose which isolated from different raw materials (dissolving pulp, bleaching chemical pulp) using acid hydrolysis, mechanically refining and TEMPO oxidation. Results showed that all samples show a typical emission peak at 574 nm due to glycosidic linkages and aliphatic C=O absorption identified by FTIR and Raman spectroscopy independent of lignin. Increasing the excitation wavelengths (510-530 nm) caused red shift of fluorescence emission peaks (570-582nm) with unchanged fluorescence intensity. Conversely, changing acid/alkaline conditions led to an increase of fluorescence intensity with no shifting of fluorescence emission peak.This study provides new insight in applying nanocellulose with special luminous characteristics in biomedicine area such as multi-color biological imaging.
Preparation and characterization of poly-Schiff base cobaltcopper phthalocyanine bimetallic complex
Authors: Xi-Lan Li , Jia-Long Song , Xiu-Fen Guo , Guag-Yan Sun 
Published: January 2021

Abstract
Schiff bases can undergo coordination reactions with metals to form polymer complexes. The method of synthesizing Schiff base is simple and easy to operate. This article mainly synthesizes mononuclear metal copper phthalocyanine and polymer o-phthalimide salicylaldehyde Schiff base cobalt-copper phthalocyanine bimetallic complex, and the Schiff base complex. It is analyzed and characterized by infrared, ultraviolet and scanning electron microscopy.
Failure analysis of the rubber expansion joint of fire water system in a nuclear power plant
Authors: XieZhe  , XuKe  , ZhangWei  , XuZhu  , ChenXueyao  , TangYi  , GuiChun  
Published: January 2021

Abstract
The rubber expansion joint of fire water system in one nuclear power plant was cracked during service. By means of macroscopic and microscopic analysis, combined with mechanical calculation, the reasons of cracks in this expansion joint were analyzed. And the results showed that: the joint action of concentrated stress caused by improper installation and unqualified rubber material led to the crack source. With the crack propagation, part of the flange was separated from the main body of the expansion joint. Recommendations were then proposed to avoid the recurrence of similar events.
Synthesis of pH-Responsive Block Copolymer By ATRP
Authors: Na Hu 
Published: January 2021

Abstract
The block copolymer, poly(4-vinylpyridine)-b-poly(tert-butylmethacrylate) (P4VP-b-PtBMA), was synthesized by atom transfer radical polymerization (ATRP) in two steps. Firstly, macroinitiator P4VP-Cl was prepared via ATRP with the conversion of monomer 66.3%. The result of GPC illustrated that the Mn of P4VP-Cl could be controlled by adjusting polymerization conditions. Then, P4VP-b-PtBMA was synthesized by ATRP using P4VP-Cl as macroinitiator. The effects of polymerization reaction parameters such as solvent and polymerization time on the M
n and M
W/M
n were investigated. Then the pH-responsive block copolymer poly(4- vinylpyridine)-b-poly(methacrylic acid) (P4VP-b-PMAA) was obtained by hydrolyzing the P4VP-b-PtBMa copolymer.
PVA-based high carboxyl group substituted modified cellulose nanofiber composite hydrogel for flexible new air battery
Authors: Li Ziyuan , Ding Qijun , Han Wenjia 
Published: January 2021

Abstract
Zinc-air battery (ZAB) with high theoretical energy density and low-cost characteristics has become one of the future candidate energy storage devices for flexible and portable electronic devices. If the application of ZAB in this field is to be promoted, how to improve the performance of solid-state batteries (such as cycle stability, discharge capacity) is the main problem at present. Flexible solid electrolyte plays a vital role in it. In this work, Carboxyl modified cellulose nanofibers (C-CNFs) was prepared by controlling the degree of carboxyl modification, and polyvinyl alcohol (PVA)-based cellulose composite gel polymer electrolyte (GPE) was synthesized. The optimal PVA-based composite GPE was selected to exhibit high ionic conductivity (0.31 S cm−1), excellent water retention and good tensile mechanical strength under environmental conditions. The assembled flexible zinc-air battery (ZAB) exhibits excellent cycle stability, discharge performance and power density. ZAB based on PVA-C-CNFs GPE can work continuously and stably for 50 hours, and at the same time has high cost-effectiveness and safety.
COVID-19 testing in English care homes and implications for staff and residents
Authors: Micocci Massimo , Gordon Adam L , Allen A Joy , Hicks Timothy , Kierkegaard Patrick , McLister Anna , Walne Simon , Hayward Gail , Buckle Peter 
Published: January 2021

Abstract

Introduction
Care home residents are at high risk of dying from coronavirus disease 2019 (COVID-19). Regular testing, producing rapid and reliable results is important in this population because infections spread quickly, and presentations are often atypical or asymptomatic. This study evaluated current testing pathways in care homes to explore the role of point-of-care tests (POCTs).

Methods
A total of 10 staff from eight care homes, purposively sampled to reflect care organisational attributes that influence outbreak severity, underwent a semi-structured remote videoconference interview. Transcripts were analysed using process mapping tools and framework analysis focussing on perceptions about, gaps within and needs arising from current pathways.

Results
Four main steps were identified in testing: infection prevention, preparatory steps, swabbing procedure and management of residents. Infection prevention was particularly challenging for mobile residents with cognitive impairment. Swabbing and preparatory steps were resource-intensive, requiring additional staff resource. Swabbing required flexibility and staff who were familiar to the resident. Frequent approaches to residents were needed to ensure they would participate at a suitable time. After-test management varied between sites. Several homes reported deviating from government guidance to take more cautious approaches, which they perceived to be more robust.

Conclusion
Swab-based testing is organisationally complex and resource-intensive in care homes. It needs to be flexible to meet the needs of residents and provide care homes with rapid information to support care decisions. POCT could help address gaps but the complexity of the setting means that each technology must be evaluated in context before widespread adoption in care homes.
Wrong Tissue in Block
Authors: Weaver Kaitlin D , De Los Santos Yanel , Gaffar Maira , Zona Melanie C , Gennaro Tyler , Shenoy Archana , Flax Sherri , Chamala Srikar , Seifert Robert P , Esnakula Ashwini K 
Published: January 2021

Abstract

Objectives
Maintaining specimen identity during surgical pathology tissue processing is critical. Epic Beaker Laboratory Information System requires sequential scanning of specimen label and grossed blocks (block confirmation) to ensure specimen identity. We report our institution’s experience with wrong tissue in block (WTIB) grossing errors before and after adopting block confirmation.

Methods
During the first 18 months of Beaker implementation, block confirmation was not required. We then mandated block confirmation for a 3-month period. To ensure compliance, we then built a “hard stop” feature that prevents scanning any unconfirmed blocks onto a packing list. We reviewed WTIB incidents pre- and postimplementation of these solutions.

Results
Before using block confirmation, we had WTIB incidents involving 17 (0.043%) of 38,848 cases. When we mandated block confirmation use, we had WTIB involving 2 (0.043%) of 4,646 cases. After implementing the hard stop feature, we had WTIB incidents involving 2 (0.005%) of 42,411 cases. Overall, there was an 88.4% (0.043% vs 0.005%; P &lt; .001) reduction in WTIB incidents using block confirmation with a hard stop.

Conclusions
Beaker is a customizable platform that can be tailored to a laboratory’s workflow. By using barcoding, implementing custom-built features, and improving workflow protocols, we significantly reduced WTIB errors.
Developing statewide remdesivir use criteria
Authors: Fox Erin R , Shah Mark , Vinik Russell , Brown Sam , Buckel Whitney , Webb Brandon , Zarndt Janet , Evans Megan , Mesdaghi Pejman , Imlay Hannah N , Spivak Emily S 
Published: January 2021

Abstract

Purpose
This report describes our process of 4 health systems coming together to agree on standard use criteria for remdesivir as a coronavirus disease 2019 (COVID-19) treatment for patients in Utah. We hope our process provides a framework for remdesivir use in other states and insights on future use of other therapeutic agents that may also be in short supply, such as vaccines and monoclonal antibodies.

Summary
Emergency use authorization (EUA) criteria for COVID-19 treatments often allow for broad use of a treatment relative to limited supplies. Without national criteria, each health system must develop further rationing criteria. Health systems in Utah worked together as part of the state’s crisis standards of care workgroup to develop a framework for how to limit the EUA criteria for remdesivir to match available supplies. The 4 largest health systems were represented by infectious diseases specialists, chief medical officers, and pharmacists. The group met several times online and communicated via email over a 9-day period to develop the criteria. The clinicians agreed to use this framework to develop criteria for future therapeutics such as monoclonal antibodies.

Conclusion
The unique collaboration of the 4 health systems in Utah led to statewide criteria for use of remdesivir for patients with COVID-19, ensuring similar access to this limited resource for all patients in Utah.
Three-Dimensional Custom-Made Surgical Guides in Facial Feminization Surgery: Prospective Study on Safety and Accuracy
Authors: Tawa Pierre , Brault Nicolas , Luca-Pozner Vlad , Ganry Laurent , Chebbi Ghassen , Atlan Michael , Qassemyar Quentin 
Published: January 2021

Abstract

Background
Facial feminization surgery (FFS) includes several osseous modifications of the forehead, mandible, and chin, procedures that require precision to provide the patient with a satisfactory result. Mispositioned osteotomies can lead to serious complications and poor aesthetic outcomes. Surgical cutting guides are commonly employed in plastic and maxillofacial surgery to improve safety and accuracy. Yet, to our knowledge, there is no report in the literature on the clinical application of cutting guides in FFS.

Objectives
The authors sought to assess the safety and accuracy of custom surgical cutting guides in FFS procedures.

Methods
A prospective follow-up of 45 patients regarding FFS with preoperative virtual planning and 3-dimensional custom-made surgical guides for anterior frontal sinus wall setback, mandibular angle reduction, and/or osseous genioplasty was conducted. Accuracy (superimposing preoperative data on postoperative data by global registration with a 1-mm margin of error), safety (intradural intrusion for the forehead procedures and injury of the infra alveolar nerve for chin and mandibular angles), and patient satisfaction were assessed.

Results
A total 133 procedures were documented. There was no cerebrospinal fluid leak on the forehead procedures or any infra alveolar nerve or tooth root injury on both chin and mandibular angle operations (safety, 100%). Accuracy was 90.80% on the forehead (n = 25), 85.72% on the mandibular angles (n = 44), and 96.20% on the chin (n = 26). Overall satisfaction was 94.40%.

Conclusions
Custom-made surgical cutting guides could be a safe and accurate tool for forehead, mandibular angles, and chin procedures for FFS.

Level of Evidence: 4