bluuebunny/crossref_metadata_2025_split huggingface dataset:
Age‐related advantage for recall of complex naturalistic information following cognitive offloading
Authors: Burnett Lois K. , Richmond Lauren L. 
Published: June 2024

AbstractPrevious work on cognitive offloading has found that young and older adults create and use external memory aids to boost performance on simple memory‐based tasks. To date, little work has investigated whether cognitive offloading can benefit performance when the memoranda are complex and naturalistic. In this study, 64 participants (32 young adults aged 18–26 years and 32 older adults aged 60+ years) studied facts about health conditions, then completed free recall and old‐new recognition tests under two conditions. In the cognitive offloading choice condition, participants could create notes during study to use on upcoming memory tests. In the internal memory condition, participants had to rely on internal memory alone. Both age groups benefited from using cognitive offloading. Notably, older adults outperformed young adults on the free recall test when given the opportunity to offload. These results suggest that cognitive offloading can help older adults overcome everyday memory challenges.
Mechanochemical Recycling of Highly Cross‐Linked Thermosets: Economic‐Friendly and Pollution‐Free
Authors: Shi Qian , Wang Tiejun 
Published: June 2024

AbstractHighly cross‐linked thermosets possess superior mechanical properties and have found broad applications in engineering. However, due to the dense cross‐links, it is extremely challenging to recycle highly cross‐linked thermosets, causing serious environmental and sustainable concerns. Herein, a mechanochemical recycling strategy is proposed for highly cross‐linked thermosets via the synergy of mechanics and chemistry, which is economic‐friendly and pollution‐free. To demonstrate the strategy, diverse metal‐complex catalysts are employed to recycle highly cross‐linked epoxy incorporated with switchable covalent bonds at certain pressure, temperature, and time. The effect of each catalyst on the efficiency of recycling is evaluated, which follows a descending order: Zr4+ > Mn3+ > Co3+ > Fe3+ > Co2+ > Zn2+ > OTi4+ > Ni2+. The results show that the mechanical properties, such as Young's modulus, ultimate strength, peak strain, impact strength, flexural modulus and strength, as well as thermal stability of the recycled samples are almost identical to those of as‐synthesized ones. The effectiveness of the method is further confirmed via micromorphology.
Fully Physically Crosslinked PNIPAM Ionogels with High Mechanical Properties and Temperature‐Managed Adhesion Achieved by H2O/Ionic Liquid Binary Solvents
Authors: Xu Sijia , Wu Shaoji , Zhu Ruitian , Qiu Zhiming , Yan Yurong 
Published: June 2024

AbstractPoly(N‐isopropylacrylamide) (PNIPAM) gels change their volume and hydrophilicity in response to temperature stimulus in flexible actuators, flexible sensors, and energy storage management. However, traditional PNIPAM gels exhibit low mechanical properties and poor self‐recovery ability due to weak intermolecular (chain) interactions and necessary covalent crosslinking. Herein, a water/ionic liquid (H2O/IL) binary solvent system that provides additional hydrogen bonding and hydrophobic interactions as well as can significantly increase the solubility (up to 60 wt.%) of NIPAM is developed. The fully physically crosslinked PNIPAM ionogel is prepared by utilizing the H2O/IL binary solvent and exhibited excellent mechanical performances, rapid self‐recovery properties, and strong adhesion strength. In addition, the lower critical solution temperature of the PNIPAM ionogel can also be tuned over a wide range (37‐70 °C) by adjusting the IL ratio in the binary solvent. Furthermore, based on the temperature sensitivity and ionic conductivity of the PNIPAM ionogel, applications of PNIPAM ionogels in smart devices, temperature‐managed adhesion, and flexible sensing are demonstrated, respectively. This work improves various performances of PNIPAM gels by using the H2O/IL binary solvent to adjust non‐covalent interactions and provided new ideas for developing high‐performance temperature‐sensitive gels.
Spectroscopic and Interferometric Sum‐Frequency Imaging of Strongly Coupled Phonon Polaritons in SiC Metasurfaces
Authors: Niemann Richarda , Mueller Niclas S. , Wasserroth Sören , Lu Guanyu , Wolf Martin , Caldwell Joshua D. , Paarmann Alexander 
Published: June 2024

AbstractPhonon polaritons enable waveguiding and localization of infrared light with extreme confinement and low losses. The spatial propagation and spectral resonances of such polaritons are usually probed with complementary techniques such as near‐field optical microscopy and far‐field reflection spectroscopy. Here, infrared‐visible sum‐frequency spectro‐microscopy is introduced as a tool for spectroscopic imaging of phonon polaritons. The technique simultaneously provides sub‐wavelength spatial resolution and highly‐resolved spectral resonance information. This is implemented by resonantly exciting polaritons using a tunable infrared laser and wide‐field microscopic detection of the upconverted light. The technique is employed to image hybridization and strong coupling of localized and propagating surface phonon polaritons in a metasurface of SiC micropillars. Spectro‐microscopy allows to measure the polariton dispersion simultaneously in momentum space by angle‐dependent resonance imaging, and in real space by polariton interferometry. Notably, it is possible to directly image how strong coupling affects the spatial localization of polaritons, inaccessible with conventional spectroscopic techniques. The formation of edge states is observed at excitation frequencies where strong coupling prevents polariton propagation into the metasurface. The technique is applicable to the wide range of polaritonic materials with broken inversion symmetry and can be used as a fast and non‐perturbative tool to image polariton hybridization and propagation.
MOF‐Derived Nanoparticles with Enhanced Acoustical Performance for Efficient Mechano‐Sonodynamic Therapy
Authors: Pan Xueting , Huang Zezhong , Guo Juan , Wu Qingyuan , Wang Chaohui , Zhang Haoyuan , Zhang Jie , Liu Huiyu 
Published: June 2024

AbstractUltrasound (US) generates toxic reactive oxygen species (ROS) by acting on sonosensitizers for cancer treatment, and the mechanical damage induced by cavitation effects under US is equally significant. Therefore, designing a novel sonosensitizer that simultaneously possesses efficient ROS generation and enhanced mechanical effects is promising. In this study, carbon‐doped zinc oxide nanoparticles (C‐ZnO) are constructed for mechano‐sonodynamic cancer therapy. The presence of carbon (C) doping optimizes the electronic structure, thereby enhancing the ROS generation triggered by US, efficiently inducing tumor cell death. On the other hand, the high specific surface area and porous structure brought about by C doping enable C‐ZnO to enhance the mechanical stress induced by cavitation bubbles under US irradiation, causing severe mechanical damage to tumor cells. Under the dual effects of sonodynamic therapy (SDT) and mechanical therapy mediated by C‐ZnO, excellent anti‐tumor efficacy is demonstrated both in vitro and in vivo, along with a high level of biological safety. This is the first instance of utilizing an inorganic nanomaterial to achieve simultaneous enhancement of ROS production and US‐induced mechanical effects for cancer therapy. This holds significant importance for the future development of novel sonosensitizers and advancing the applications of US in cancer treatment.
pH‐Responsive β‐Glucans‐Complexed mRNA in LNPs as an Oral Vaccine for Enhancing Cancer Immunotherapy
Authors: Luo Po‐Kai , Ho Hui‐Min , Chiang Min‐Chun , Chu Li‐An , Chuang Ya‐Han , Lyu Ping‐Chiang , Hu I‐Chen , Chang Wan‐An , Peng Sheng‐Yao , Jayakumar Jayachandran , Chen Hsin‐Lung , Huang Ming‐Hsi , Sung Hsing‐Wen 
Published: June 2024

AbstractmRNA vaccines for cancer immunotherapy are commonly delivered using lipid nanoparticles (LNPs), which, when administered intravenously, may accumulate in the liver, potentially limiting their therapeutic efficacy. To overcome this challenge, the study introduces an oral mRNA vaccine formulation tailored for efficient uptake by immune cells in the gastrointestinal (GI) tract, known for its high concentration of immune cells, including dendritic cells (DCs). This formulation comprises mRNA complexed with β‐glucans (βGlus), a potential adjuvant for vaccines, encapsulated within LNPs (βGlus/mRNA@LNPs). The βGlus/mRNA complexes within the small compartments of LNPs demonstrate a distinctive ability to partially dissociate and reassociate, responding to pH changes, effectively shielding mRNA from degradation in the harsh GI environment. Upon oral administration to tumor‐bearing mice, βGlus/mRNA@LNPs are effectively taken up by intestinal DCs and local nonimmune cells, bypassing potential liver accumulation. This initiates antigen‐specific immune responses through successful mRNA translation, followed by drainage into the mesenteric lymph nodes to stimulate T cells and trigger specific adaptive immune responses, ultimately enhancing antitumor effects. Importantly, the vaccine demonstrates safety, with no significant inflammatory reactions observed. In conclusion, the potential of oral βGlus/mRNA@LNPs delivery presents a promising avenue in cancer immunotherapy, offering needle‐free and user‐friendly administration for widespread adoption and self‐administration.
Advances in Piezoelectret Materials‐Based Bidirectional Haptic Communication Devices
Authors: Gong Yanting , Zhang Kaijun , Lei Iek Man , Wang Yan , Zhong Junwen 
Published: June 2024

AbstractBidirectional haptic communication devices accelerate the revolution of virtual/augmented reality and flexible/wearable electronics. As an emerging kind of flexible piezoelectric materials, piezoelectret materials can effortlessly convert mechanical force into electrical signals and respond to electrical fields in a deformation manner, exhibiting enormous potential in the construction of bidirectional haptic communication devices. Existing reviews on piezoelectret materials primarily focus on flexible energy harvesters and sensors, and the recent development of piezoelectret‐based bidirectional haptic communication devices has not been comprehensively reviewed. Herein, a comprehensive overview of the materials construction, along with the recent advances in bidirectional haptic communication devices, is provided. First, the development timeline, key characteristics, and various fabrication methods of piezoelectret materials are introduced. Subsequently, following the underlying mechanisms of bidirectional electromechanical signal conversion of piezoelectret, strategies to improve the d33 coefficients of materials are proposed. The principles of haptic perception and feedback are also highlighted, and representative works and progress in this area are summarized. Finally, the challenges and opportunities associated with improving the overall practicability of piezoelectret materials‐based bidirectional haptic communication devices are discussed.
Covalent Organic Framework Nanoarchitectonics: Recent Advances for Precious Metal Recovery
Authors: Guo Weikang , Liu Jiale , Tao Haijuan , Meng Juan , Yang Juan , Shuai Qin , Asakura Yusuke , Huang Lijin , Yamauchi Yusuke 
Published: June 2024

AbstractThe recovery of precious metals (PMs) from secondary resources has garnered significant attention due to environmental and economic considerations. Covalent organic frameworks (COFs) have emerged as promising adsorbents for this purpose, owing to their tunable pore size, facile functionalization, exceptional chemical stability, and large specific surface area. This review provides an overview of the latest research progress in utilizing COFs to recover PMs. Firstly, the design and synthesis strategies of chemically stable COF‐based materials, including pristine COFs, functionalized COFs, and COF‐based composites, are delineated. Furthermore, the application of COFs in the recovery of gold, silver, and platinum group elements is delved into, emphasizing their high adsorption capacity and selectivity as well as recycling ability. Additionally, various interaction mechanisms between COFs and PM ions are analyzed. Finally, the current challenges faced by COFs in the field of PM recovery are discussed, and potential directions for future development are proposed, including enhancing the recyclability and reusability of COF materials and realizing the high recovery of PMs from actual acidic wastewater. With the targeted development of COF‐based materials, the recovery of PMs can be realized more economically and efficiently in the future.
Large‐Area Artificial van der Waals “Mille‐Feuille” Superlattices
Authors: Wei Hao , Dubois Simon , Brunnett Frederic , Peiro Julian , Godel Florian , Carrétéro Cécile , Panciera Federico , Collin Sophie , Bouamrane Fayçal , Zatko Victor , Galbiati Marta , Carré Etienne , Patriarche Gilles , Petroff Frédéric , Charlier Jean‐Christophe , Martin Marie‐Blandine , Dlubak Bruno , Seneor Pierre 
Published: June 2024

AbstractVan der Waals heterostructures are set as strong contenders for post‐CMOS quantum materials engineering. A major step for their systematic exploration and exploitation of technological component demonstrators resides in their eased large‐scale design. In this direction, the growth of artificial van der Waals 2D superlattices is presented here such as (MoS2/WS2)n, (WS2/WSe2)n, and (MoS2/WSe2)n with unit cells repetitions reaching n > 10. The fabrication of these materials is enabled by a fully automated in‐situ pulsed laser deposition (PLD) tool. This approach provides cm2 scale homogeneous superlattices with on‐demand material parameters tailoring (layer number, order, and composition). The process is rapid and simple compared to manual pickup exfoliation methods or to sequential transfers of single layers grown by techniques such as chemical vapor deposition, allowing a large repetition of the unit cells in a “mille‐feuille” cake configuration. The computational exploration of this family of superlattice materials sheds light on the potential for optoelectronic property design by shaping the band‐structure landscape while taking into account the influential effects induced by proximity. Overall, this large‐area approach is proposed as an entry point for the systematic design of complex van der Waals heterostructures.
A Femtosecond Electron‐Based Versatile Microscopy for Visualizing Carrier Dynamics in Semiconductors Across Spatiotemporal and Energetic Domains
Authors: Zhang Yaqing , Chen Xiang , Yu Yaocheng , Huang Yue , Qiu Moxi , Liu Fang , Feng Min , Gao Cuntao , Deng Shibing , Fu Xuewen 
Published: June 2024

AbstractCarrier dynamics detection in different dimensions (space, time, and energy) with high resolutions plays a pivotal role in the development of modern semiconductor devices, especially in low‐dimensional, high‐speed, and ultrasensitive devices. Here, a femtosecond electron‐based versatile microscopy is reported that combines scanning ultrafast electron microscopy (SUEM) imaging and time‐resolved cathodoluminescence (TRCL) detection, which allows for visualizing and decoupling different dynamic processes of carriers involved in surface and bulk in semiconductors with unprecedented spatiotemporal and energetic resolutions. The achieved spatial resolution is better than 10 nm, and the temporal resolutions for SUEM imaging and TRCL detection are ≈500 fs and ≈4.5 ps, respectively, representing state‐of‐the‐art performance. To demonstrate its unique capability, the surface and bulk carrier dynamics involved in n‐type gallium arsenide (GaAs) are directly tracked and distinguished. It is revealed, in real time and space, that hot carrier cooling, defect trapping, and interband‐/defect‐assisted radiative recombination in the energy domain result in ordinal super‐diffusion, localization, and sub‐diffusion of carriers at the surface, elucidating the crucial role of surface states on carrier dynamics. The study not only gives a comprehensive physical picture of carrier dynamics in GaAs, but also provides a powerful platform for exploring complex carrier dynamics in semiconductors for promoting their device performance.
Optical Amplification at 1.5 µm in ErIII Coordination Polymer‐Doped Waveguides Based on Intramolecular Energy Transfer
Authors: Shi Xiaowu , Man Yi , He Yan , Xu Hui , Zhang Baoping , Yu Daquan , Lin Zhuliang , Lv Ziyue , Zhao Zhiyuan , Zhang Linqi , Chen Yongjian , Zhang Dan 
Published: June 2024

Abstract9,9‐bis (diphenylphosphorylphenyl) fluorene (FDPO) and dibenzotetrathienoacene (DBTTA), are synthesized as the neutral and anionic ligands, respectively, to prepare the ErIII coordination polymer [Er(DBTTA)3(FDPO)]n. Based on the intramolecular energy transfer, optical gains at 1.5 µm are demonstrated in [Er(DBTTA)3(FDPO)]n‐doped polymer waveguides under excitations of low‐power light‐emitting diodes (LEDs) instead of laser pumping. A ligand‐sensitization scheme between organic ligands and Er3+ ions under an excitation of an ultraviolet (UV) LED is established. Relative gains of 10.5 and 8.5 dB cm−1 are achieved at 1.53 and 1.55 µm, respectively, on a 1‐cm‐long SU‐8 channel waveguide with a cross‐section of 2 × 3 µm2 and a 1.5‐µm‐thick [Er(DBTTA)3(FDPO)]n‐doped polymethylmethacrylate (PMMA) as upper cladding. The ErIII coordination polymer [Er(DBTTA)3(FDPO)]n can be conveniently integrated with various low‐loss inorganic waveguides to compensate for optical losses in the C‐band window. Moreover, by relying on the intramolecular energy transfer and UV LED top‐pumping technology, it is easy to achieve coupling packaging of erbium‐doped waveguide amplifiers (EDWAs) with pump sources in planar photonic integrated chips, effectively reducing the commercial costs.
Reactivity‐Tunable Fluorescent Platform for Selective and Biocompatible Modification of Cysteine or Lysine
Authors: Ren Xiaojie , Li Haokun , Peng Hui , Yang Yang , Su Hang , Huang Chen , Wang Xuan , Zhang Jie , Liu Zhiyang , Wei Wenyu , Cheng Ke , Zhu Tianyang , Lu Zhenpin , Li Zhengqiu , Zhao Qian , Tang Ben Zhong , Yao Shao Q. , Song Xiangzhi , Sun Hongyan 
Published: June 2024

AbstractChemoselective modification of specific residues within a given protein poses a significant challenge, as the microenvironment of amino acid residues in proteins is variable. Developing a universal molecular platform with tunable chemical warheads can provide powerful tools for precisely labeling specific amino acids in proteins. Cysteine and lysine are hot targets for chemoselective modification, but current cysteine/lysine‐selective warheads face challenges due to cross‐reactivity and unstable reaction products. In this study, a versatile fluorescent platform is developed for highly selective modification of cysteine/lysine under biocompatible conditions. Chloro‐ or phenoxy‐substituted NBSe derivatives effectively labeled cysteine residues in the cellular proteome with high specificity. This finding also led to the development of phenoxy‐NBSe phototheragnostic for the diagnosis and activatable photodynamic therapy of GSH‐overexpressed cancer cells. Conversely, alkoxy‐NBSe derivatives are engineered to selectively react with lysine residues in the cellular environment, exhibiting excellent anti‐interfering ability against thiols. Leveraging a proximity‐driven approach, alkoxy‐NBSe probes are successfully designed to demonstrate their utility in bioimaging of lysine deacetylase activity. This study also achieves integrating a small photosensitizer into lysine residues of proteins in a regioselective manner, achieving photoablation of cancer cells activated by overexpressed proteins.
Hierarchical NiCo2Se4 Arrays Composed of Atomically Thin Nanosheets: Simultaneous Improvements in Thermodynamics and Kinetics for Electrocatalytic Water Splitting in Neutral Media
Authors: Chen Hongyu , Xu Yongsheng , Li Xiaojie , Ma Qing , Xie Delong , Mei Yi , Wang Guojing , Zhu Yuanzhi 
Published: June 2024

AbstractThe inefficiency of electrocatalysts for water splitting in neutral media stems from a comprehensive impact of poor intrinsic activity, a limited number of active sites, and inadequate mass transport. Herein, hierarchical ultrathin NiCo2Se4 nanosheets are synthesized by the selenization of NiCo2O4 porous nanoneedles. Theoretical and experimental investigations reveal that the intrinsic hydrogen evolution reaction (HER) activity primarily originate from the NiCo2Se4, whereas the high oxygen evolution reaction (OER) performance is related to the NiCoOOH due to the structural reconstruction. The abundant Se and O vacancies introduced by atomically thin nanostructure modulate the electronic structure of NiCo2Se4 and NiCoOOH, thereby improving the intrinsic HER and OER activities, respectively. COMSOL simulation demonstrate the edges of extended nanosheets from the main body significantly promote the charge aggregation, boosting the reduction and oxidation current during HER/OER process. This charge aggregation effect notably exceeds the tip effect for the nanoneedle, highlighting the unique advantage of the hierarchical nanosheet structure. Benefiting from abundant vacancies and unique nanostructure, the hierarchical ultrathin nanosheet simultaneously improve the thermodynamics and kinetics of the electrocatalyst. The optimized samples display an overpotential of 92 mV for HER and 214 mV for OER at 100 mA cm−2, significantly surpassing the performance of currently reported HER/OER catalysts in neutral media.
Al‐Rich AlGaN Channel High Electron Mobility Transistors on Silicon: A Relevant Approach for High Temperature Stability of Electron Mobility
Authors: Bassaler Julien , Mehta Jash , Abid Idriss , Konczewicz Leszek , Juillaguet Sandrine , Contreras Sylvie , Rennesson Stéphanie , Tamariz Sebastian , Nemoz Maud , Semond Fabrice , Pernot Julien , Medjdoub Farid , Cordier Yvon , Ferrandis Philippe 
Published: June 2024

AbstractUltrawide bandgap (UWBG) semiconductors offer new possibilities to develop power electronics. High voltage operation for the off‐state as well as high temperature stability of the devices in on‐state are required. More than AlGaN/GaN heterostructures, AlGaN/AlGaN heterostructures are promising candidates to meet these criteria. Furthermore, the possibility to choose the Al molar fraction of AlGaN paves the way to more tunable heterostructures. In this study, the electronic transport properties of AlGaN channel heterostructures grown on silicon substrates with various aluminum contents, focusing on the temperature dependence of the electron mobility, is investigated. Experimental results from Hall effect measurements are confronted with carrier scattering models and deep level transient spectroscopy analysis to quantify limiting effects. These results demonstrated the significant potential of Al‐rich AlGaN channel heterostructures grown on silicon substrates for high power and high temperature applications.