bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Highly Stable Diketopyrrolopyrrole (DPP) Polymer for Chemiresistive Sensors
Authors: Ngai Jenner H. L. , Gao Xiguang , Kumar Pankaj , Polena John , Li Yuning 
Published: January 2021

AbstractA novel donor–acceptor (D‐A) conjugated polymer, poly[bis(2‐ethylhexyl)3‐(3′′,4′‐bis(dodecyloxy)‐[2,2′:5′,2′′‐terthiophen]‐5‐yl)‐1,4‐dioxo‐6‐(thiophen‐2‐yl)pyrrolo[3,4‐c]pyrrole‐2,5(1H,4H)‐dicarboxylate] (PDEB), comprising an electron‐accepting carbamate side‐chain bearing thiophene‐flanked diketopyrrolopyrrole (DPPTh) and an electron‐donating 3,3′‐bis(dodecyloxy)‐2,2′‐bithiophene (C12‐BTO) is synthesized. The carbamate side‐chains in this polymer can be thermally removed at a moderate temperature, forming an insoluble polymer poly[3‐(3″,4′‐bis(dodecyloxy)‐[2,2′:5′,2″‐terthiophen]‐5‐yl)‐6‐(thiophen‐2‐yl)‐2,5‐dihydropyrrolo[3,4‐c]pyrrole‐1,4‐dione] (PDNB) with high solvent resistance. PDNB has a high highest occupied molecular orbital energy level of −4.68 eV and a narrow band gap of 1.05 eV, which makes it dopable by HCl to form a stable conductive polymer PDNB:HCl with moderate conductivity of 0.24 S cm–1. A chemiresistive sensor based on PDNB:HCl can distinguish ten common volatile organic liquids with unique current–time profiles under a low operation voltage of 1 V. Importantly, a single sensor can be used many times and remain functional over a long period of time in air, indicating its extraordinary operational and environmental stability. The results demonstrate that PDNB is a promising material for reusable chemiresistive sensors.
Luminescence Behavior and Acceptor Effects of Ambipolar Polymeric Electret on Photorecoverable Organic Field‐Effect Transistor Memory
Authors: Ke Chun‐Yao , Chen Mei‐Nung , Chiu Yu‐Cheng , Liou Guey‐Sheng 
Published: January 2021

AbstractPhotorecovery systems are considered to be a potential technology in photosensor, green energy‐saving, and high‐speed communication applications (light‐fidelity). However, the role of photoactive‐electret and semiconductor in the photorecovery system is still unintelligible. Herein, triphenylamine (TPA)‐based donor–acceptor polymers are designed as electrets with more effective excitons dissociation for organic field‐effect transistor memory equipped with photosensitive and photorecoverable response. By modifying TPA‐derived conjugated polymers with various electron‐withdrawing groups (PTPA‐CN, PTPA‐CNBr, and PTPA‐3CN), the obtained PTPAs induce disparate luminescent behaviors in the aggregated state. PTPA‐CN and PTPA‐CNBr exhibit aggregation‐induced emission (AIE) featuring the energy dissipation of partial photoexcited excitons through radiation, while PTPA‐3CN turns to aggregation‐caused quenching (ACQ) behavior leading considerable number of nonemissive excitons which can directly recombine with charged medium, an electret containing trapped charges. Pentacene‐based transistor devices incorporated with studied photoactive electrets are constructed for mechanism investigation. The results demonstrate that photorecovery response ability of ACQ‐polymer displays much faster than that of AIE‐polymers, PTPA‐CN, and PTPA‐CNBr, upon UV light irradiation, attributing to the intensely electron‐withdrawing ability of acceptor attached on the conjugated skeleton. The ACQ‐electret device behaves superior memory switching performance with reliable endurance characteristics under the cycling stress of electrical‐programming and optical‐erasing operations, demonstrating the feasibility for organic optoelectronic applications.
Gate‐Tunable Negative Differential Resistance in Next‐Generation Ge Nanodevices and their Performance Metrics
Authors: Böckle Raphael , Sistani Masiar , Eysin Kilian , Bartmann Maximilian G. , Luong Minh Anh , den Hertog Martien I. , Lugstein Alois , Weber Walter M. 
Published: January 2021

AbstractIn the quest to push the contemporary scientific boundaries in nanoelectronics, Ge is considered a key building block extending device performances, delivering enhanced functionalities. In this work, a quasi‐1D monocrystalline and monolithic Al–Ge–Al nanowire heterostructure are embedded into a novel field‐effect transistor architecture capable of combining Ge based electronics with an electrostatically tunable negative differential resistance (NDR) distinctly observable at room temperature. In this regard, a detailed study of the key metrics of NDR in Ge is presented. Most notably, a highly efficient and low‐footprint platform is demonstrated, paving the way for potential applications such as fast switching multi‐valued logic devices, static memory cells, or high‐frequency oscillators, all implemented in one fully complementary metal–oxide–semiconductor compatible Al‐Ge based device platform.
Achieving Broadband Spin‐Correlated Asymmetric Reflection Using a Circular Dichroitic Meta‐Mirror
Authors: Wang He , Li Yongfeng , Huang Lingling , Jing Yao , Yuan Qi , Wang Jiafu , Zhang Jieqiu , Qu Shaobo 
Published: January 2021

AbstractGuiding electromagnetic waves carrying spin angular momentum is an important issue in both optical and microwave communities that thus has intrigued enormous interest in the past few decades. In particular, asymmetrical propagation is seriously considered as a possibility to push the development of encryption communication and electromagnetic circulators, which is a hot area but still a challenge. Circular dichroism, referring to differential absorption of distinct polarization states, provides an alternative scheme to achieve asymmetric propagation in a spin‐correlated way. Here, a paradigm of obtaining broadband asymmetric reflection to push the exploration in this aspect is proposed. With this aim, an N‐shaped resonator loaded with two lumped resistors is designed as a meta‐atom to reveal the amplitude flipping of nearly 0 and 1 for distinct polarization states. Combining with Pancharatnam–Berry phases, the arbitrary phase profile of a designated spin state can be achieved. As a proof‐of‐principle, a robust meta‐mirror is fabricated to acquire broadband electromagnetic focusing under the illumination of left‐handed circularly polarized (LHCP) wave. On the other hand, the reflection of right‐handed circularly polarized (RHCP) wave is substantially suppressed. Both numerical simulation and experimental measurement are carried out to demonstrate the feasibility of this system.
Fabrication of Core‐Shell Nanocolloids with Various Core Sizes to Promote Light Capture for Green Fuels
Authors: Ren Yuanfu , Liu Guoqiang , Zhu Ting 
Published: January 2021

AbstractCore‐shell nanocolloids with tailored physical and chemical merits hold attractive potential for energy‐related applications. Herein, core‐shell nanocolloids composed of zinc/copper sulfide (ZnS/CuSx) shells and silica (SiO2) cores were fabricated by a template‐engaged synthetic method. Interestingly, the sizes of SiO2 cores can be tuned by different sulfurization time. In virtue of the light scattering and reflection on the SiO2 surface, the efficiencies of light capture by ZnS/Cu2S shells were highly dependent on the SiO2 sizes. The as‐fabricated SiO2@ZnS/Cu2S with a core size of 205 nm exhibited the highest and broadest absorption within a light wavelength of 380–700 nm. In virtue of the structural and componential features of these nanocolloids, maximum photocatalytic hydrogen (H2) production rates of 2968 and 1824 μmol h−1 g−1 under UV‐vis and visible light have been delivered, respectively. This work may provide some evidence for the design and fabrication of core‐shell nanomaterials to convert solar energy to green fuels.
A novel cooperative searching architecture for multi‐unmanned aerial vehicles under restricted communication
Authors: Ran Huanhuan , Sun Liang , Cheng Shu , Ma Yunfeng , Yan Shan , Meng Shunkai , Shi Kaibo , Wen Shiping 
Published: January 2021

AbstractSearching for a distinguishable lost target in a bounded area automatically with unmanned aerial vehicle (UAV) is a fundamental problem in the theory of physical search. This paper studies the problem in detail, presents a new and more realistic Bayesian formula representing the problem by taking communication capability of UAVs into consideration, and focuses on the case of applying a team of multiple cooperative UAVs in the field for the search, where each UAV can autonomously search the area for the target using Bayesian filtering algorithm. The perturbation of the searching performance by the different prior belief probability distribution functions is investigated. Empirical evidence findings illustrate that our approach yields improved accuracy.
Verbinder aus Kunstharzpressholz – Versuche mit ersten Prototypen für Traglasten bis 500 kN
Authors: Aurand Simon , Blaß Hans Joachim 
Published: January 2021

AbstractSystemverbinder für Holz‐Holz‐Verbindungen von Nebenträgern an Hauptträger sind zweiteilige Verbinder aus Metall, deren Vorteil sich u. a. im hohen Vorfertigungsgrad auszeichnet. Für die Entwicklung von neuartigen Haupt‐Nebenträger‐Systemverbindern aus Kunstharzpressholz wurden verschiedene Oberflächenbehandlungen untersucht und die jeweiligen Reibbeiwerte zwischen Verbinder und Holz ermittelt. Aufbauend auf diesen Ergebnissen wurden in Vorversuchen Verbindungen mit geneigten Schrauben untersucht. Dabei wurden sowohl die Anordnung als auch die Anzahl und Länge der Schrauben systematisch variiert. Überprüft wurden dabei mögliches Blockscherversagen ganzer Schraubengruppen als auch die wirksame Verbindungsmittelanzahl. Das Prüfprogramm umfasste Versuche mit Lasten in drei Hauptrichtungen für verschiedene Prototypen. Zu Beginn wurden Verbinder für eine Tragfähigkeit in Einschubrichtung von 180 kN geprüft, daraufhin Schwerlastverbinder für Traglasten bis 500 kN. Aus den Versuchen resultierten neue Erkenntnisse für die Bemessung solcher Verbindungen. Das ursprünglich vorgeschlagene Rechenmodell wurde sukzessive angepasst und eine auftretende Moment‐Normalkraft‐Interaktion in den Schrauben berücksichtigt. Mit einem mittleren Verhältnis aus Versuchsergebnis zu rechnerischer Schätzlast von 1,05 trifft das angepasste Modell die Tragfähigkeit sehr gut. Im direkten Vergleich der charakteristischen Tragfähigkeiten der Prototypen mit handelsüblichen Verbindern schneiden diese sehr gut ab und übertreffen z. T. Verbinder aus Aluminium.
Lung abscess as a complication of COVID‐19 infection, a case report
Authors: Zamani Nazanin , Aloosh Oldooz , Ahsant Samane , Yassin Zeynab , Abkhoo Aminreza , Riahi Taghi 
Published: January 2021

AbstractTo our knowledge, no previous studies have reported lung abscess as a complication of COVID‐19 infection. It is essential to follow‐up with the patients after discharge for such complications, especially if they are symptomatic.
Atypical osteomalacia mimicking radiological features of spondyloarthritis: Never judge a book by its cover
Authors: Maatallah Kaouther , Ben Nessib Dorra , Riahi Hend , Ferjani Hanen , Hamdi Ons , Kaffel Dhia , Hamdi Wafa 
Published: January 2021

AbstractLongstanding osteomalacia, by its proliferative enthesopathic changes, may mimic the advanced features of SpA. Despite the typical radiological findings, the lack of response to anti‐TNF should encourage clinicians to reconsider the diagnosis.
An adult case with absence of left pulmonary artery and partial anomalous pulmonary venous connection: Case report and literature review
Authors: Asadian Sanaz , Saedi Sedigheh , Jahanshahi Bahareh , Hosseini Leila , Rezaeian Nahid 
Published: January 2021

AbstractUnilateral absence of pulmonary artery is a rare congenital disorder that can remain asymptomatic until adulthood. Absence of left pulmonary artery (ALPA) has been reported in one‐third of these patients. We are the first to introduce an adult case of ALPA associated with partial anomalous pulmonary venous connection.
Combined Dynamic Kinetic Resolution and C−H Functionalization for Facile Synthesis of Non‐Biaryl‐Atropisomer‐Type Axially Chiral Organosilanes
Authors: Li Zhao , Wang Xu , Cui Yu‐Ming , Ma Jun‐Han , Fang Li‐Lei , Han Lu‐Lu , Yang Qin , Xu Zheng , Xu Li‐Wen 
Published: January 2021

AbstractAlthough asymmetric C−H functionalization has been available for the synthesis of structurally diverse molecules, catalytic dynamic kinetic resolution (DKR) approaches to change racemic stereogenic axes remain synthetic challenges in this field. Here, a concise palladium‐catalyzed DKR was combined with C−H functionalization involving olefination and alkynylation for the highly efficient synthesis of non‐biaryl‐atropisomer‐type (NBA) axially chiral oragnosilanes. The chemistry proceeded through two different and distinct DKR: first, an atroposelective C−H olefination or alkynylation produced axially chiral vinylsilanes or alkynylsilanes as a new family of non‐biaryl atropisomers (NBA), and second, the extension of this DKR strategy to twofold o,o′‐C−H functionalization led to the multifunctional axially chiral organosilicon compounds with up to >99 % ee.
Photothermal Polymers in Near Infrared Window
Authors: He Yonglin , Liao Shenglong , Wang Yapei 
Published: January 2021

AbstractNear infrared (NIR) light occupies a significant proportion in solar energy, and it also exhibits high penetration depth in biological tissue owing to its low absorption by pigments and water. Hence, the effective utilization of NIR light is a matter of great significance for energy and biomedical applications. However, the low energy of NIR photons routinely fails to initiate effective photochemical reactions or photoelectric conversion. As an attractive alternative to exciton separation, photothermal conversion ranks as the most efficient approach to use NIR light in the pathways of non‐irradiative emission. Based on our efforts in the investigation of photothermal materials and their related applications, this article highlights the factors of light harvesting and photothermal materials in regard to their benefits in improving light use efficiency particularly in NIR window. Several thermally dependent applications which are established on photothermal conversion are exemplified, such as NIR‐triggered polymer annealing, control of catalytic reactions, and NIR light detection.
What is the most favorite and original chemistry developed in your research group?I would like to choose the concept of green electronics based on ionic liquids, which is an intriguing substitute to traditional solid semiconductors for reducing electronic waste.How do you supervise your students?I put more concerns to the younger students at the beginning of their research career, while leaving free space to senior students. My group is a highly interdisciplinary team, so I allow students to choose their research interests depending on their background.What are your hobbies?I like playing basketball. I always believe that alternate work with sports can enable us to get more with less effort.How do you keep balance between research and family?To be honest, it is hard to balance these two issues. Yet, research withgreat interests will be always in the first place and this choice has been fully understood and supported by my wife as she is also doing a similar job with me.Who influences you mostly in your life?Specifically for my academic life, I would say Prof. Xi Zhang and Prof. Joseph DeSimone, who are my PhD supervisor and Postdoc supervisor, respectively, influence me very much. Prof. Xi Zhang taught me the way to enjoy scientific research and Prof. Joseph DeSimone let me know the attractive possibility of transforming fundamental research to industrial applications.Could you please give us some advices on improving Chinese Journal of Chemistry?Keep confidence as you are doing now. This representative Chinese journal is believed to arouse greater global impact if more activities like public recommendation and control of paper quality are taken into account.
Evaluation of pelvic washing specimens in patients with endometrial cancer: Cytomorphological features, diagnostic agreement, and pathologist experience
Authors: Davis Richard C. , Broadwater Gloria , Foo Wen‐Chi , Jones Claudia K. , Havrilesky Laura J. , Bean Sarah M. 
Published: January 2021

BackgroundPelvic washings for patients with endometrial cancer is recommended but not used for staging. The International System for Reporting Serous Fluid Cytology (TIS) has standardized diagnostic categories, but the criteria remain incomplete. The 3 primary goals of this study were to 1) investigate features that distinguish atypical/indeterminate from malignant specimens, 2) measure the level of agreement between chart and reviewer diagnoses, and 3) determine whether the number of years in practice had an effect on the diagnoses rendered.MethodsPelvic washings and surgical pathology specimens for 52 patients with a chart diagnosis of atypical/indeterminate, suspicious, or malignant cytology and 52 age‐matched controls with a negative chart diagnosis were included, reviewed blindly by 2 cytopathologists, and assigned a study diagnosis. Morphologic features were assessed. Agreement between original chart diagnoses and reviewer diagnoses were assessed as well as effect of years in practice.ResultsThe overall cellularity in cell block (CB) slides for the malignant category was significantly increased compared with the atypical/indeterminate category (P < .0001). In addition, the number of atypical groups in ThinPrep for malignant washings was significantly increased compared with the atypical category (P < .001) and the negative and suspicious categories (P < .0001) in the CB. Overall agreement between the original and adjudicated diagnoses was high (γ = 0.983). There was no significant difference between diagnoses rendered and years in practice.ConclusionThe overall cellularity and number of atypical cells can be used to distinguish between malignant and atypical pelvic washing specimens. There is high reproducibility in the diagnostic categories and high agreement among pathologists, regardless of practice experience. These findings can help refine the criteria for TIS.
Modeling, simulation, and case analysis of COVID‐19 over network public opinion formation with individual internal factors and external information characteristics
Authors: Chen Tinggui , Peng Lijuan , Yang Jianjun , Cong Guodong 
Published: January 2021

AbstractWith the development of information technology, the Internet has become an important channel of public opinion for expressing public interests, emotion, and ideas. Public emergency usually spreads via network. Due to the temporal and spatial flexibility and the information amplification of network, the opinions from different regions and background are easy to be represented as network public opinion, and have important impact on social and economic life. Thus, studying the formation mechanism of network public opinion has important theoretical and practical significance. Taking the formation process of network public opinion under emergencies as the research object, this paper first identifies the key factors influencing the formation of network public opinion, namely the internal characteristics (include individual education level, individual stubbornness, individual initial opinion, and so on) and external information of individuals (include external information intensity). Second, information intensity is introduced to describe the influence of external information feature on the formation of network public opinion. Individual education level, individual stubbornness, and individual initial opinion are analyzed to describe the influence of individual internal factors on the formation, and then its model is constructed. Through the simulation experiments, this paper analyzes the influence of external information intensity, individual education level, individual stubbornness, individual initial opinion, and other factors on the formation of network public opinion. The simulation results show that: (1) the greater intensity of public emergency reporting causes the easier formation of network public opinion; (2) the higher individual education level leads to the shorter time for completing the final formation and stable state of online public opinions, and after the formation of online public opinions, the opinion of the event is mainly neutral; (3) the greater individual's stubbornness makes the shorter formation time of online public opinion. When online public opinion reaches a stable state, the neutral opinion group dominates and firmly controls the development trend of public opinion; (4) the difference of opinions among individuals is the most important factor affecting the formation of network public opinion. Finally, the rationality and validity of the proposed model are verified by a real case. Compared with previous studies on the formation mechanism of network public opinion, this paper divides the formation process of network public opinion into three stages: individual information perception, individual decision making, and individual opinion transmission. Meanwhile, the influence of individual internal factors and external information characteristics on the formation process of network public opinion is also considered.
The therapeutic processes of avatar therapy: A content analysis of the dialogue between treatment‐resistant patients with schizophrenia and their avatar
Authors: Beaudoin Mélissa , Potvin Stéphane , Machalani Alexandra , Dellazizzo Laura , Bourguignon Lysandre , Phraxayavong Kingsada , Dumais Alexandre 
Published: January 2021

AbstractObjectiveBecause the therapeutic processes of Avatar Therapy remain equivocal, the current study aims to further extend our previous findings by analysing the evolution of the avatars' and patients' speech and changes in patient responses as sessions progressed.DesignEighteen patients with treatment‐resistant schizophrenia were selected from two clinical trials on Avatar Therapy. Three coders analysed both the avatars' and patients' discourse during immersive therapy sessions using content analysis methods.ResultsOur analyses enabled the categorization of the avatar discourse into confrontational techniques (e.g., provocation) and positive techniques (e.g., reinforcement). Patients responded to these utterances using coping mechanism or by expressing emotions, beliefs, self‐perceptions or aspirations. Through identification of mutual changes in the interaction between the patient and their avatar, a shift was observed over the sessions from confrontation to a constructive dialogue. Assertiveness, emotional responses and prevention strategies seemed to be central to the therapeutic process, and these usually occur in response to positive techniques.ConclusionInvestigating AT's therapeutic process may help to identify components to achieve positive outcomes and can enable the development of more effective treatments. Further studies should explore the association between these themes and therapeutic response to help predict which patients will better respond to Avatar Therapy.
Screening of a test charge in a free‐electron gas at warm dense matter and dense non‐ideal plasma conditions
Authors: Moldabekov Zhandos A. , Dornheim Tobias , Bonitz Michael 
Published: January 2021

AbstractThe screening of a test charge by partially degenerate non‐ideal free electrons at conditions related to warm dense matter and dense plasmas is investigated using linear response theory and the local field correction based on ab initio Quantum Monte‐Carlo simulations data. The analysis of the obtained results is performed by comparing to the random phase approximation and the Singwi–Tosi–Land–Sjölander approximation. The applicability of the long‐wavelength approximation for the description of screening is investigated. The impact of electronic exchange‐correlations effects on structural properties and the applicability of the screened potential from linear response theory for the simulation of the dynamics of ions are discussed.