bluuebunny/crossref_metadata_2025_split huggingface dataset:
Electrochemical Copolymerization of Poly (MET-EDOT) with Enhanced Cyclic Stability
Authors: Zhang Hangchuan 
Published: August 2023

Abstract
To enlarge the electrochromic cyclic lifetime of poly (3-methtylthiophene) (PMET), the EDOT was copolymerized with the P3MT by electrochemical polymerization. The constant potential of 2.2 V was applied to the copolymer film growth in the electrolyte with 0.001 M EDOT and 0.1 M MET. The copolymer was achieved through the characteristics of the FT-IR and Raman analysis. The PMET-EDOT retained the vivid EC color from the PMET and the long cyclic stability from the PEDOT. The transmittance contrast of PMET-EDOT only decayed 1.5% after 1000 cycles. During the few components of EDOT in the copolymer, it seems similar that the transmittance spectrum and variation between the PMET-EDOT and PMET.
The study on the conductivity of TCNQ-modified 2D conjugated metal sulfur-dilute nanosheets
Authors: Sun Cuicui , Wang Wenchao , Lu Minghui , Zhang Mingdong , Wang Jiacun , Hao Ruichao , Wang Yaqi 
Published: August 2023

Abstract
Metal-organic frame materials are an important classification of new materials in metal-organic materials, and it is also the most popular area of research. Since the constituent bonds of the metal-organic framework are that the metal ions are connected to the redox-inert organic ligand, the conductivity of the MOF skeleton is not very good. There are many ways to improve the electrical conductivity of MOF skeletons, such as changing the variety of metal atoms and organic skeletons or introducing objects to modify the molecules. The way selected in this article to enhance the conductivity of the 2D conjugated metal sulfur-dilute MOF skeleton is to introduce the object-modified molecule TCNQ into the gap of the MOF material to enhance the conductivity of the material. This paper explores the conductivity of this material. After a series of calculations, the conductivity of 2D conjugated metal sulfur-dilute MOF modified by TCNQ was significantly improved.
The Anomalous Reflection and Refraction of Metasurface in the View of Solar Concentrators
Authors: Jin Qiyuan , He Jingwen , Wang Zhifeng , Guo Minghuan 
Published: August 2023

Abstract
Solar thermal power generation integrates photothermal conversion power generation and low-cost, large-scale heat storage, which is the primary support for constructing a green power system with new energy as the main body. The concentrating system is a critical component of solar thermal power plants. However, traditional concentrators are bulky and require complex solar tracking systems, limiting the reduction of solar thermal power costs. The metasurface can freely regulate electromagnetic waves and can be used in the field of solar concentrators, making it suitable for developing lightweight, low-cost, tracking-free solar concentrators and being a transformative technological solution in the energy field. Considering that the solar position varies with respect to a fixed planar metasurface concentrator, in this paper, we investigate the anomalous reflection and refraction phenomenon on the metasurface when the incident plane is not parallel to the direction of the static phase gradient of the metasurface. Utilizing vector equation derivation, Matlab calculation, and full-wave simulation based on the Finite difference-time domain (FDTD) method, all found the new property of the metasurface: its refracted ray, reflected ray, and normal are in the same plane, which is called the exit plane, and is at a certain angle to the incident plane.
Controllable Preparation and Size-Dependent SERS Performance of 35–410 nm Quasi-spherical Au NPs
Authors: Zhang Peina , Liu Tao , Zheng Jingxuan , Zhang Zhichao , Zuo Mengjiao 
Published: August 2023

Abstract
Uniform Au NPs with definite but different sizes will serve as a perfect model for studying the influence of NP size on surface-enhanced Raman scattering (SERS) performance. In this study, using tri-hydroxymethyl aminomethane (Tris-base) as a stabilizer and FeCl2 as a reducing agent, Au NPs with the size of 110–410 nm were prepared by a one-step method by simply changing the amount of FeCl2. In the preparation of small particle size Au NPs, sodium citrate was introduced as an auxiliary stabilizer, and 35–85 nm Au NPs were prepared in one step. In addition, the synthetic Au NPs of different sizes were loaded onto the glass substrate and 4-MOTP was used as the probe molecule to monitor their SERS properties. The results showed that the SERS activity results showed a “volcanic shape” with the change of nanoparticle size at a fixed excitation wavelength. The 160 nm Au NPs have the best SERS performance when the excitation wavelength is 633 nm.
Polysaccharide-modified conductive hydrogel for flexible electronic devices
Authors: Ji Chongkai , Li Lijie , Nie Yulin , Ping Rang , Peng Jiong , Li Xin 
Published: August 2023

Abstract
In recent years, conductive hydrogels, as an ideal flexible material, have quite broad application prospects in various flexible electronics fields, such as flexible supercapacitors, flexible batteries, and flexible sensors. However, mechanical stress such as stretching, fracture, and compression will affect the performance of conductive hydrogel during the application, which limits its further application. Polysaccharides, such as cellulose and chitosan, are widely distributed and easy-to-obtain biological macromolecules, which contain a large number of polar functional groups (carboxyl, amino, etc.), which can be formed with polymer hydrogel molecular chains, thereby improving the performance of the hydrogel. Herein, we prepared a kind of conductive hydrogel with high toughness, high conductivity, and self-adhesion by introducing carboxymethyl chitosan and maltose to induce a dynamic Schiff base reaction in the hydrogel. It is conceived that this study proposed a potential approach for the progress of conductive hydrogels in various flexible electronics fields.
Optimal sizing design of the hydrogen-based system for the stand-alone island
Authors: Li Miao , Huo Ran , Ming Pingwen 
Published: August 2023

Abstract
The main barriers to using Renewable Energy Sources (RES) to generate electricity are intermittency with low penetration in the electricity network and high seasonal demand fluctuation. An optimum hydrogen-based system configuration is designed for absorbing the maximization of RES curtailments using water electrolysis to produce and store hydrogen. This paper also developed a simulation model to optimize the proper size of electrolyzers and other parameters of the whole system. In order to validate the model, a hybrid electricity network for relatively stand-alone islands, located in eastern coastal China, has been used as a case study. Our analysis showed that the sizing of the required electrolyzer was determined by the operational temperature, the cell U-I curves, and the input of usable RES curtailments. For the application, a large amount of available hydrogen could be produced from the RES curtailments with an average conversion efficiency higher than 75.4%. And almost half of the rejected RES energy (54.7%) was returned to the electrical network through fuel cell stacks during high demand periods.
Impedance spectroscopy – comparison of dielectric model with experimental results
Authors: Kusak I , Lunak M , Mizerova C , Rovnanik P 
Published: August 2023

Abstract
Impedance measurements of building materials have been gaining popularity especially in the last twenty years. No electrical component has only resistance, capacitance or inductance, as there is an interplay of these parameters. This is compounded in the case of building materials, which contain a significant number of different phases that vary in chemical composition, crystalline structure and properties. It is, therefore, necessary to choose a connection and measurement system that provides the most accurate information about the building material. This information is primarily meant to include the complex impedance, its components and the quantities derived from them. The derived quantities are electrical resistance or electrical capacitance. Using these quantities we can point out the composition of the material, its conductivity and identify the percolation threshold or describe its sensory properties in more detail. For measurements, an alternating electric field is crucial, and the range of frequencies depends on the instruments used. For materials characterization, the most used frequency range is 100 Hz to 100 kHz; however, we can measure down to 1 MHz.
Ultra-high performance fiber concrete for architectural purposes
Authors: Bibora P , Leber P 
Published: August 2023

Abstract
The aim of the research works is the development of ultra-high-performance fiber concrete (UHPFRC) for architectual purposes, such as facade panels and their accessories. Research is aimed at achieving high utility properties in the form of high flexural tensile strength, low absorption and very good durability of the developed UHPFRC. The research is also focused on the development of the production technology itself, by pouring and spraying fresh UHPFRC mixtures into molds. The development of cast UHPFRC is also focused on the design and optimization of the production technology, which will enable an automatic production process and reduce costs for the production of flat facade panels. The development of sprayed UHPFRC will make it possible to produce 3D elements with higher utility properties compared to currently produced products from ordinary fiberglass concrete (GFRC).
Research progress of implantation materials and its biological evaluation
Authors: Wang Han , Meng Zhu , Zhao Chen-Yu , Xiao Yong-Hao , Zeng Hang , Lian Huan , Guan Rui-Qin , Liu Yu , Feng Zeng-Guo , Han Qian-Qian 
Published: August 2023

Abstract
With the development of modern material science, life science and medical science, implantation materials are widely employed in clinical fields. In recent years, these materials have also evolved from inert supports or functional substitutes to bioactive materials able to trigger or promote the regenerative potential of tissues. Reasonable biological evaluation of implantation materials is the premise to make sure their safe application in clinical practice. With the continual development of implantation materials and the emergence of new implantation materials, new challenges to biological evaluation have been presented. In this paper, the research progress of implantation materials, the progress of biological evaluation methods, and also the characteristics of biocompatibility evaluation for novel implantation materials, like animal-derived implantation materials, nerve contact implantation materials, nanomaterials and tissue-engineered medical products were reviewed in order to provide references for the rational biological evaluation of implantable materials.
Climate change greatly escalates forest disturbance risks to US property values
Authors: Anderegg William R L , Collins Timothy , Grineski Sara , Nicholls Sarah , Nolte Christoph 
Published: August 2023

Abstract
Anthropogenic climate change is projected to drive increases in climate extremes and climate-sensitive ecosystem disturbances such as wildfire with enormous economic impacts. Understanding spatial and temporal patterns of risk to property values from climate-sensitive disturbances at national and regional scales and from multiple disturbances is urgently needed to inform risk management and policy efforts. Here, we combine models for three major climate-sensitive disturbances (i.e., wildfire, climate stress-driven tree mortality, and insect-driven tree mortality), future climate projections of these disturbances, and high-resolution property values data to quantify the spatiotemporal exposure of property values to disturbance across the contiguous United States (US). We find that property values exposed to these climate-sensitive disturbances increase sharply in future climate scenarios, particularly in existing high-risk regions of the western US, and that novel exposure risks emerge in some currently lower-risk regions such as the southeast and Great Lakes regions. Climate policy that drives emissions towards low-to-moderate climate futures avoids large increases in disturbance risk exposure compared to high emissions scenarios. Our results provide an important large-scale assessment of climate-sensitive disturbance risk to property values to help inform land management and climate adaptation efforts.
Flat-band ferromagnetism in the SU(N) Hubbard and Kondo lattice models
Authors: Tamura Kensuke , Katsura Hosho 
Published: August 2023

Abstract
We develop a general theory of flat-band ferromagnetism in the SU(N) Fermi–Hubbard model, which describes the behavior of N-component fermions with SU(N) symmetric interactions. We focus on the case where the single-particle spectrum has a flat band at the bottom and establish a necessary and sufficient condition for the SU(N) Hubbard model to exhibit ferromagnetism when the number of particles is the same as the degeneracy. We show that the occurrence of ferromagnetism is equivalent to the irreducibility of the projection matrix onto the space of single-particle ground states. We also demonstrate that this result can be exploited to establish a rigorous result for the ferromagnetic SU(N) Kondo lattice model with a flat band. Specifically, we prove that when the SU(N) Hubbard model is ferromagnetic, the ferromagnetic SU(N) Kondo lattice model with the same hopping matrix also exhibits SU(N) ferromagnetism.
Optimization of the calcination and two-step sintering temperatures of (K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3 ceramics
Authors: Vuong Le Dai , Lich Nguyen Quang , Cuong Ngo Xuan , Nha Vo Quang , Nhat Nguyen Dang , Hieu Le Dinh , Son Lai Phươc , Linh Huynh Thi Thuy , Chuc Nguyen Huu , Tuyen Tran Nguyen An , Dat Trinh Ngoc , Wei Pai-Chun 
Published: August 2023

Abstract
Lead-free (K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3 (KNLNS) ceramics have been successfully optimized for the calcination and two-step sintering temperatures. The experimental results reveal that the KNLNS powder calcined at 850 or 900 °C presented a pure perovskite phase with an orthorhombic phase. The particle size was in the range of 0.1–0.4 μm. The two-step sintering temperature (range: 950 to 1100 °C) significantly affects the structure, microstructure, and electrical properties of KNLNS ceramics. The presence of a pure perovskite phase with good crystallization is observed in all samples. The microstructure was researched by varying the two-step sintering temperature to obtain a dense microstructure and a clear grain boundary in order to optimize their piezoelectric properties. The best electrical properties of KNLNS ceramics were recorded at the optimized temperature of 1050 °C (density (ρ): 4,35 g cm−3; electromechanical coupling factor (k

p
): 0.33, k
t: 0.35; dielectric constant (ε

r
): 849; dielectric loss (tanδ): 0.073; maximum dielectric constant (ε
max at T
C): 6659; piezoelectric constant (d
33): 195 pC N−1; remanent polarization (P

r
): 16.1 μC cm−2; energy storage density (W
rec): 0.36 J cm−3; energy storage efficiency (η): 48.1%; t
2 = 4 h), proving the efficacy of the two-step sintering technique.
Investigation of methods to quantify silver screen-printed onto cellulosic substrate: towards recycling of printed electronics
Authors: Conceição João H F , Party M , Curtil D , Švecová L , Marlin N , Reverdy-Bruas N 
Published: August 2023

Abstract
The continued progress in electronics technology has led to unsustainable consumption of plastic-based products containing, in their majority, natural finite metallic resources. The substitution of these plastic materials by more sustainable ones, such as cellulosic substrates, is one of many measures applied by the industry to reduce their environmental impact. In this work, due to the lack of information in the literature, a fast and accurate method to measure the amount of metal deposited onto a paper-based substrate is proposed. The development of this method will contribute to the creation of a procedure for determining the quantity of metal present in end-of-life printed electronics. The present work investigates and compares four different methodologies. Image processing and geometrical analyses presented overestimated and non-precise results for printed Ag. A third method based on gravimetric measurements presented to be more accurate compared with the previous methods. The last method based on acid leaching of the printed electronic ashes outcome to be the more precise, reliable and simpler method, and overcomes challenges associated to the printed pattern geometry and the materials used during its production. These results will provide key information for the development of a quantitative methodology to determine the percentage of Ag used in paper-based electronics that can be adapted easily by the industry. Furthermore, this method is a prerequisite for recycling processes devoted to this type of electronics after reaching their end-of-life, considering Ag as one of the major components to be separated and, further, valorized.
In-situ graphene oxide reduction via inkjet printing using natural reducing inks
Authors: Khan Junaid , Mariatti M 
Published: August 2023

Abstract
The development of eco-friendly alkali lignin-assisted water-based stable graphene oxide (GO) ink presents an innovative approach with the potential to revolutionize the manufacturing of printed and flexible electronics through scalable inkjet printing. However, GO lacks conductivity, necessitating an additional reduction step to restore its electrical properties. Traditional reduction methods using toxic agents or high temperatures are not suitable for large-scale manufacturing due to environmental hazards. In-situ reduction techniques using natural substances offer a promising, cost-effective, and continuous solution for precise reduction of GO-printed patterns via inkjet printing. However, limited research has been conducted on natural-based inkjet printable reducing inks. In this work, in-situ inkjet printable natural reducing inks were produced and printed on top of GO-printed patterns to carry out the reduction process. The reduced printed patterns were investigated for structural, functional groups, morphology, and electrical resistance. The ascorbic acid reduced sample showed an increase in the I
D/I
G ratio from 1.058 to 1.15, and the interlayer distance decreased from 0.395 to 0.385 nm. The atomic force microscope surface analysis showed a significant increase in the mean roughness by three times for the ascorbic acid-reduced sample, indicating success in the reduction process. The ascorbic acid reduced patterns also showed an electrical conductivity of 1250 S m−1 compared to 0.43 S m−1 for unreduced GO printed patterns, indicating restoration of the sp2 hybridised conductive networks.
Response of Cryptolestes ferrugineus (Coleoptera: Laemophloeidae) adults to small temperature (0–6 °C) and moisture (1%) differences in wheat
Authors: Anukiruthika T , Jayas Digvir S , Jian Fuji 
Published: August 2023

Abstract
Insects respond to temperature and moisture and their differences or gradients in grain bulks, but how small these differences can be is unknown. Response of Cryptolestes ferrugineus (Stephens) adults to 0–6 °C temperature differences in 1 m wheat (12.5% moisture content, w.b.) columns was determined in 24 h. Similarly, the moisture response of the adults was determined in 1 m grain columns with a 1 percentage point difference in the wheat moisture content (12.5 and 13.5%) at 25 °C in 24 h. Adults were highly temperature and moisture sensitive and were able to respond to the lowest temperature difference of 1 °C and moisture difference of 1 percentage point within the wheat column. The temperature preference of the adults was confirmed with the recovery of about 78% of insects from the middle warmer sections of wheat at 25 or 30 °C when there was no temperature difference at other sections of the wheat columns. Irrespective of the temperature differences, on average of about 29% of adults moved towards the warmer end with the highest recovery of 47.3% observed at the temperature difference of 6 °C. The adult recovery from high-moisture locations decreased with an increase in distance away from the point of insect introduction (0.05–0.45 m). About 14% of adults moved to the furthest location of high-moisture ends (13.5% moisture content wheat) at 0.45 m. This study provided valuable insights for the development of mathematical models to predict 3D insect movement and distribution in storage grain bins.
Wellness Wheel Clinics: A First Nation community-partnered care model improving healthcare access, from healthcare providers’ perspectives
Authors: Pandey Mamata , Clark Megan , Beresh Erin , Nilson Solveig , Kay Cynthia , Campbell Trisha , Nicolay Susanne , Skinner Stuart 
Published: August 2023

Abstract
First Nation people residing in rural and remote communities have limited primary healthcare access, which often affects chronic disease management leading to poor health outcomes. Individuals with lived experiences of chronic disease and substance use, along with health directors, advocated for improved services. Subsequently, an urban healthcare team in partnership with four First Nation communities developed an Outreach clinic to address healthcare access barriers. Established in 2016, this community-led clinic improves primary care access and chronic disease management in First Nation communities. Employing a qualitative research design, interviews were conducted with 15 clinic providers and 9 community members to explore the clinic’s 1-year post-implementation impacts. Thematic data analysis indicated that engagement and approval by community leadership, support from Elders and community members and collaboration with existing community healthcare staff were crucial for establishing the Outreach clinic. Initial logistical challenges with space allocation, equipment, medical supplies, funding, staffing, medical records and appointment scheduling were resolved through community consultation and creative solutions. A nurse coordinator ensured continuity of care and was integral to ensuring clients receive seamless care. The commitment of the outreach team and the collective goal of providing client-centered care were instrumental in the clinic’s success. In partnership with communities, access to healthcare in First Nation communities can be enhanced by coordinating Outreach clinics through existing community healthcare facilities.