bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Irradiance‐Adaptable Near‐Infrared Vertical Heterojunction Phototransistor
Authors: Zhang Mengyu , Chi Zhiguo , Wang Guoqing , Fan Zelong , Wu Honglei , Yang Ping , Yang Junbo , Yan Peiguang , Sun Zhenhua 
Published: August 2022

AbstractBioinspired artificial visual perception devices with the optical environment‐adaptable function have attracted significant attention for their promising potential in applications like robotics and machine vision. In this regard, a photodetector with in‐sensor adaptability is longed for in terms of complexity, efficiency, and cost. Here, a near‐infrared phototransistor with a benign light irradiance‐adaptability is presented. The phototransistor uses a vertically stacking graphene/lead sulfide quantum dots/graphene heterojunction as the conductive channel. Compared with ordinary lead sulfide quantum dots‐decorated graphene phototransistors, the present device demonstrates a faster photoresponse speed and an abnormal transfer characteristic. The latter characteristic is induced by the gate voltage‐tunable Fermi level in the heterojunction and the abundant electron trap states in the quantum dot film, which jointly results in an intense dependence of the photoresponse on the gate voltage. The dynamic trapping and de‐trapping processes in the quantum dot film enable the inhibition or potentiation of the photoresponse, based on which the photopic or scotopic adaptation behavior of the human retina is successfully mimicked, respectively. By providing an irradiance‐adaptable photodetector with a spectral response beyond visible light, this work should inspire future research on artificial environment‐adaptable perception devices.
Enhanced Competition at the Nano–Bio Interface Enables Comprehensive Characterization of Protein Corona Dynamics and Deep Coverage of Proteomes
Authors: Ferdosi Shadi , Stukalov Alexey , Hasan Moaraj , Tangeysh Behzad , Brown Tristan R. , Wang Tianyu , Elgierari Eltaher M. , Zhao Xiaoyan , Huang Yingxiang , Alavi Amir , Lee‐McMullen Brittany , Chu Jessica , Figa Mike , Tao Wei , Wang Jian , Goldberg Martin , O'Brien Evan S. , Xia Hongwei , Stolarczyk Craig , Weissleder Ralph , Farias Vivek , Batzoglou Serafim , Siddiqui Asim , Farokhzad Omid C. , Hornburg Daniel 
Published: August 2022

AbstractIntroducing engineered nanoparticles (NPs) into a biofluid such as blood plasma leads to the formation of a selective and reproducible protein corona at the particle–protein interface, driven by the relationship between protein–NP affinity and protein abundance. This enables scalable systems that leverage protein–nano interactions to overcome current limitations of deep plasma proteomics in large cohorts. Here the importance of the protein to NP‐surface ratio (P/NP) is demonstrated and protein corona formation dynamics are modeled, which determine the competition between proteins for binding. Tuning the P/NP ratio significantly modulates the protein corona composition, enhancing depth and precision of a fully automated NP‐based deep proteomic workflow (Proteograph). By increasing the binding competition on engineered NPs, 1.2–1.7× more proteins with 1% false discovery rate are identified on the surface of each NP, and up to 3× more proteins compared to a standard plasma proteomics workflow. Moreover, the data suggest P/NP plays a significant role in determining the in vivo fate of nanomaterials in biomedical applications. Together, the study showcases the importance of P/NP as a key design element for biomaterials and nanomedicine in vivo and as a powerful tuning strategy for accurate, large‐scale NP‐based deep proteomic studies.
Zn‐Metal–Organic Framework Derived Ordered Mesoporous Carbon‐Based Nanostructure for High‐Performance and Universal Multivalent Metal Ion Storage
Authors: Zhang Hong , Wang Haozhi , Pan Zhenghui , Wu Zhong , Deng Yida , Xie Jianping , Wang John , Han Xiaopeng , Hu Wenbin 
Published: August 2022

AbstractMetal–organic framework (MOF) derivatives promise great potential in energy storage and conversion because of their excellent tunability in both the active metal sites, organic links, and the overall structures down to atomic and up to mesoscale. Nevertheless, a big challenge is to precisely control and thoroughly understand the actual MOF‐to‐derivative conversion process to realize the template‐free synthesis of the MOF‐derived ordered mesoporous materials. Here, a class of ordered mesoporous N‐doped carbon nanoflakes is presented with slit‐shaped pores synthesized by one‐step pyrolysis of Zn1Cux–MOF, where the Cu doping plays a critically important direction‐inducing function on the dissociation of organic ligands during the pyrolysis. Benefiting from the uniquely ordered mesoporous structure and large specific surface area (910 m2 g−1), the Zn1Cux–MOF‐derived ordered mesoporous carbon nanoflakes present outstanding electrochemical storage performance for multivalent metal ions, such as Mg2+, Ca2+, Co2+, Ni2+, Al3+, and Zn2+, demonstrating the universal nature of the slit‐shaped pores in enabling the multivalent metal ions for energy storage. Moreover, the assembled flexible Zn‐ion hybrid supercapacitor (ZHSC) delivers a high specific capacity of 134 mAh g−1 at 0.5 A g−1, excellent cycling and mechanical stability, showing great application potential in the new generation energy storage devices.
Ultrasound‐Controlled Swarmbots Under Physiological Flow Conditions
Authors: Fonseca Alexia Del Campo , Kohler Tobias , Ahmed Daniel 
Published: August 2022

AbstractNavigation of microrobots in living vasculatures is essential in realizing targeted drug delivery and advancing non‐invasive surgeries. Acoustically‐controlled “swarmbots” are developed based on the self‐assembly of clinically‐approved microbubbles (MBs). Ultrasound is noninvasive, penetrates deeply into the human body, and is well‐developed in clinical settings. This propulsion strategy relies on two forces: the primary radiation force and the secondary Bjerknes force. Upon ultrasound activation, the MBs self‐assemble into microswarms, which migrate toward and anchor at the containing vessel's wall. A second transducer, which produces an acoustic field parallel to the channel, propels the swarms along the wall. Noting that human arteries have a blood flow 5–19 cm s−1, powerful features of cross‐ and upstream swarmbot navigation are demonstrated against physiologically‐relevant flow rates that reach 16.7 cm s−1. Additionally, controlled navigation of swarmbots is shown within mice blood and under pulsatile flow conditions of 100 beats per minute (bpm); an adult human heart at rest executes between 60 and 100 bpm. This capability represents a much‐needed pathway for advancing preclinical research.
In Situ Raman Observation of Dynamically Structural Transformation Induced by Electrochemical Lithium Intercalation and Deintercalation from Multi‐Electrochromic V2O5 Thin Films
Authors: Zhang Zhuohui , Xie Weiping , Li Jia , Zhang Hongliang , Wang Qiang , Zhang Chengli , Xu Guanglong , Gao Junhua , Rogachev A. A. , Cao Hongtao 
Published: August 2022

AbstractUnderstanding the dynamic nature of electrochemical interface induced by ion transfer is of great significance. Herein, in situ Raman spectroscopy combined with electrochemistry has been developed to real‐time monitor the transfer of lithium ions at electrode‐electrolyte interface and reveal the associated structure and performance variation of the vanadium pentoxide (V2O5) thin films on the indium tin oxide/silver/aluminum zinc oxide/poly(ethylene terephthalate) (ITO/Ag/AZO/PET) substrates. It is demonstrated that the Raman active/silent states of the vibrational modes of VO, V3O, and VO bonds, as well as the transformation of the V2O5 thin films from V2O5 to lithium vanadate (LixV2O5), can be reversibly changed with reversible extraction/insertion of lithium ions. In situ UV‐vis spectroscopy in combination with in situ Raman analysis is applied to show that the reversible evolutions involving V2O5/LixV2O5 and VO bonding characteristic contribute to the multi‐color electrochromic characteristic of the V2O5 thin films enabling a superior optical modulation of up to 75.41%. This experimental approach establishes a significative guideline for the more elaborate research on the dynamic nature of electrochemical interface.
Electrolyte‐Controlled Permeability in Nanocellulose‐Stabilized Emulsions
Authors: Heise Katja , Jonkergouw Christopher , Anaya‐Plaza Eduardo , Guccini Valentina , Pääkkönen Timo , Linder Markus B. , Kontturi Eero , Kostiainen Mauri A. 
Published: August 2022

AbstractParticle‐stabilized emulsions, so‐called Pickering emulsions (PEs), are a promising low‐tech avenue to precisely engineered materials for applications in drug delivery, catalysis, or water remediation. The particle assembly at the liquid–liquid interface provides superior stability and an adjustable permeability, which is a key parameter for controllable compound capture and release. However, understanding the complex factors that control the particle assembly in detail is a still‐remaining challenge limiting practical applications of PEs in an industrial framework. In this study, the properties of oil‐in‐water emulsions, stabilized by cellulose nanocrystals (CNCs), are investigated. It is shown how high ionic strength leads to low polydispersity droplets, with restricted permeability across the oil‐water interface due to the dense packing of the CNC layer. In contrast, lower electrolyte concentration enables enhanced uptake through the interface, while providing the required stability for the reusability of the material. The authors continue to study the impact of the electrolyte content on the dynamic responses of the emulsions, leading to a liquid–liquid system with tunable cyclic uptake and release levels. Overall, the results highlight the potential of nanocellulose‐stabilized emulsions as tunable and robust material platform with well‐defined permeability characteristics—made in a simple way.
High‐Performance Full‐Solution‐Processed Oxide Thin‐Film Transistor Arrays Fabricated by Ultrafast Scanning Diode Laser
Authors: Xu Meng , Hu Sunjie , Peng Cong , Jing Bin , Chen Longlong , Li Xifeng , Zhang Jianhua 
Published: August 2022

AbstractThe full‐solution‐processed oxide thin‐film transistor (TFT) array is successfully realized by using ultrafast scanning diode laser annealing (USDLA). It integrates all solution‐processed functional thin films well, including low‐electrical‐resistivity transparent conductive indium‐tin‐oxide (ITO) thin film, high‐k dielectric hafnium‐aluminum‐oxide (HAO) thin film, and high‐quality semiconductor tungsten‐zinc‐tin‐oxide (WZTO) thin film. And the stacked multilayer thin films as a whole exhibit a smooth surface with the root mean square (RMS) roughness of 0.293 nm. The full‐solution‐processed TFT array exhibits a uniform overall TFT device performance, the average values including subthreshold swing of 118 mV dec−1, threshold voltage of −0.45 V, and mobility of 12 cm2 V−1 s−1. Moreover, the full‐solution‐processed TFTs have good bias illumination stability, especially the VT shift of the PBIS and NBIS are only 0.09 and 0.4 V, respectively. The result implies that the USDLA technique can meet the large‐scale fabrication of full‐solution‐processed TFTs and provide a solid path to low‐cost high‐performance and large‐scale electronics.
Bromide‐Mediated Reduction Kinetics and Oxidative Etching for Manipulating the Twin Structure and Facet of Pd Nanocrystals for Catalysis
Authors: Hsieh Chia‐Jui , Liu Yi‐Hong , Tsao Chi‐Yen , Lin Jui‐Tai , Chi Chong‐Chi , Chang Chun‐Wei , Hsiao Yueh‐Chun , Wu Cheng‐Yu , Yang Tung‐Han 
Published: August 2022

AbstractWith Pd as an example, a set of quantitative analyses is designed to shed light on the bromide‐mediated reduction kinetics and oxidative etching in determining the twin structure and facet of Pd nanocrystals. The success of this work relies on the kinetic measurements of Pd(II) precursor reduction and the close examinations of resultant Pd seeds and nanocrystals at different stages of synthesis. We observe there is a clear trend where low, moderate, and high initial Pd(II) reduction rates regulated by Br− ions correspond to the formation of Pd seeds with singly‐twinned, multiply‐twinned, and single‐crystal structures in the nucleation stage, respectively. Our quantitative analyses also suggest the oxidative etching induced by oxygen/Br− pair can selectively remove the multiply‐twinned Pd seeds from the products in the growth stage while leaving behind singly‐twinned or single‐crystal Pd seeds for the evolution into Pd nanocrystals with well‐defined facets in high purity. The mechanistic insights obtained in this work can be extended to the synthesis of Pd@Pd−Pt core−shell nanocubes with high‐index facets, which can be used as excellent electrocatalysts and photocatalysts for hydrogen generation.
Core‐Shell Se‐Doped TiO2@Carbon Nanotubes for High‐Performance Sodium‐Ion Batteries
Authors: Yao Menglong , Gao Ang , Chen Ruochen , He Qiangrui , Yao Tianhao , Wang Hongkang 
Published: August 2022

AbstractTitanium dioxide (TiO2) has been considered as a promising anode material for sodium‐ion batteries (SIBs), because of its abundance, safety and eco‐friendliness. However, the inferior electronic conductivity and low sodium ion diffusion rate of TiO2 hinder its improvement of electrochemical performance. To overcome these drawbacks, herein, core‐shell Se‐doped TiO2@carbon nanotubes (denoted as Se‐TiO2@CNTs) are successfully designed and fabricated, in which the TiO2 nanoparticle aggregated shells are conformally coated on the carbon nanotubes, while the metallic Se species are physically confined within the meso/micropores. When examined as a SIB anode, the Se‐TiO2@CNTs electrode demonstrates excellent sodium storage performance, correspondingly delivering high reversible capacities of 222.7/208.5 mA h g−1 after 200/1000 cycles at current densities of 0.2/1.0 A g−1, and even a capacity of 140.2 mA h g−1 after 4500 cycles at a high‐rate of 5.0 A g−1. The high reversible capacity, long‐term cycling stability, and high‐rate capability of the Se‐TiO2@CNTs can be owing to the unique structure characteristics, as the hollow/porous structure with high specific surface area of 335.4 m2 g−1 efficiently shortens the Na+ diffusion length and facilitates the electrolyte penetration, while Se‐doping and carbon supporting greatly enhance the electronic conductivity of the Se‐TiO2@CNTs electrode.
Synergetic Pt Atoms and Nanoparticles Anchored in Standing Carbon‐Derived from Covalent Organic Frameworks for Catalyzing ORR
Authors: Zhou Mingan , Liu Minghao , Miao Qiyang , Shui Hengfu , Xu Qing 
Published: August 2022

AbstractOxygen reduction reaction (ORR) plays key roles in fuel cells and metal air batteries. Covalent organic frameworks (COFs)‐derived carbons have been utilized for catalyzing ORR. However, the activity and selectivity for these catalysts in the acidic medium is still under improved. In this work, Pt atoms and uniform Pt nanoparticles supported by standing carbons are derived from a three‐dimensional COF. With increasing the contents of Pt ions, the corresponding particle sizes show obvious decrease, and thus resulting in higher catalytic activity. The synergetic roles between Pt atoms and nanoparticles with average sizes of 6.19 nm make catalyst show remarkable activity toward ORR, with onset potential and half‐wave potential of 0.98 and 0.85 V (vs RHE) in the acidic medium, which are 70 and 40 mV more positive than those of Pt/C, respectively. This work provides a new insight for developing COFs in energy storage and conversion systems.
Active Buffer Matrix in Nanoparticle‐Based Silicon‐Rich Silicon Nitride Anodes Enables High Stability and Fast Charging of Lithium‐Ion Batteries
Authors: Kilian Stefan O. , Wankmiller Björn , Sybrecht Anna Margarete , Twellmann Jonas , Hansen Michael Ryan , Wiggers Hartmut 
Published: August 2022

AbstractA very promising way to improve the stability of silicon in lithium‐ion battery (LIB) anodes is the use of nanostructured silicon‐rich silicon nitride (SiNx), known as a conversion‐type anode material. To investigate the conversion mechanism in this material in detail, SiN0.5 nanoparticles are synthesized and examined as LIB anodes using a combination of ex situ X‐ray photoelectron spectroscopy and solid‐state 7Li MAS NMR measurements. During the initial cycle, the conversion of SiN0.5 nanoparticles results in the formation of lithium silicides and a buffer matrix consisting of different lithium nitridosilicates and lithium nitride. These phases can be reversibly lithiated and contribute to the total reversible capacity of the silicon nitride active material. The structure of the material after conversion is best described by an amorphous solid solution. Further, it is shown that silicon‐rich silicon nitrides possess improved rate capability because of the higher ionic conductivity of the buffer matrix compared to pure silicon, and very fine dispersion of silicon clusters throughout the buffer matrix. Thus, unlike most conversion materials, the silicon‐rich silicon nitride exhibits an additional intrinsic active functionality of the buffer matrix that goes far beyond the mere reduction of electrolyte contact area and volume expansion.
One‐Dimensional Photonic Crystal for Surface Mode Polarization Control
Authors: Mogni Erika , Pellegrini Giovanni , Gil‐Rostra Jorge , Yubero Francisco , Simone Giuseppina , Fossati Stefan , Dostálek Jakub , Martínez Vázquez Rebeca , Osellame Roberto , Celebrano Michele , Finazzi Marco , Biagioni Paolo 
Published: August 2022

AbstractBloch surface waves sustained by truncated 1D photonic crystals (1DPCs) are well known tools for surface‐enhanced spectroscopy. They provide strongly confined fields with uniform distribution over a large surface area, a characteristic exploited in standard refractometric sensing. However, their application to polarization‐sensitive investigations is not straightforward because the transverse electric (TE) and magnetic (TM) surface modes possess distinct dispersion relations, therefore their relative phase is not conserved along propagation and the polarization state of any wave obtained by combining these modes is ill‐defined. In this work, a novel design of a 1DPC is realized in which the TE and TM modes exhibit the same phase velocity over a broadband spectral range and thus their dispersion relations overlap. The capability to simultaneously excite TE and TM modes with a well‐defined phase relation allows the generation of surface waves with a controlled polarization state. This paves the way to polarization‐resolved surface‐enhanced analysis, including, for example, linear and circular dichroism spectroscopy of grafted molecular layers at the photonic crystal surface.
Non‐Interleaved Polarization‐Frequency Multiplexing Metasurface for Multichannel Holography
Authors: Gou Yue , Ma Hui Feng , Wu Liang Wei , Sun Shi , Wang Zheng Xing , Cui Tie Jun 
Published: August 2022

AbstractIn order to enhance channel capacity in modern wireless communications, diverse multiplexing techniques, such as polarization, frequency, and spatial multiplexing, are proposed and implemented. Here, a non‐interleaved polarization‐frequency multiplexing metasurface is proposed, which can realize independent controls of orthogonal linearly polarized or circularly polarized waves in two frequency bands to achieve four independent information channels. As a proof of concept, the metasurfaces that can independently realize four different polarized holographic images in two frequency bands are designed, simulated, and measured. The results show that two orthogonally polarized holographic images are achieved in each frequency band, respectively, which can be either linear or circular polarization. Benefitting from the advantages of non‐interleaved design, the proposed metasurfaces can reach not only high information capacity but also high information density by taking full use of the metasurface apertures.
Binary Ligand‐Mediated Photochromic Tuning of Lanthanide‐Doped Upconversion Nanoparticle Conjugates
Authors: Peng Chenxi , Chen Xue , Suh Yung Doug , Liu Xiaowang 
Published: August 2022

AbstractThe ability to tune photochromic features of nanoparticle (NP)‐ligand conjugates can vastly extend the utility of dynamic materials in the fields of drug delivery, bioimaging, and data storage. Herein, the photochromic tuning of lanthanide‐doped upconversion nanoparticle (UCNP)‐spiropyran (SP) conjugates through a binary ligand strategy is reported. It is found that the content of SP ligand on the surface of UCNPs can be rationally controlled by an SP‐to‐oleate ligand exchange reaction, allowing for regulating the steric congestion in the ligand layer. A highly congested SP layer not only leads to an ultralong lifetime for the purple open‐ring state but also results in improved red fluorescence under UV excitation. The enhancement in steric congestion further enables increased activation energy for the ring‐opening reaction for the bound SP ligand, permitting the generation of high‐resolution self‐erasing patterns in a UCNP‐SP conjugate‐doped polydimethylsiloxane film by local irradiation with either UV or near‐infrared light. The findings provide new insights into the optical tuning of nanoconjugates by controlling the conformational dynamics of their mixed ligand layers.
Synthesis of Substituted Pyrimido[1,2‐b]indazoles through (3+2+1) Cyclization of 3‐Aminoindazoles, Ketones, and N,N‐Dimethylaminoethanol as One‐Carbon Synthon
Authors: Qin Zemin , Ma Renchao , Ying Shenpeng , Li Fanzhu , Ma Yongmin 
Published: August 2022

Abstract2‐Mono‐ or 2,3‐disubstituted pyrimido[1,2‐b]indazoles are synthesized by a (3+2+1) three‐component cyclization of 3‐aminoindazoles, ketones, and N,N‐dimethylaminoethanol as a methine source. The reaction demonstrates good tolerance of both aromatic and aliphatic ketones, as well as various substitution patterns in air. A plausible mechanism is discussed.magnified image
Photoredox and Copper‐Catalyzed Sulfonylphosphorothiolation of Alkenes toward β‐Sulfonyl Phosphorothioates
Authors: Zhang Pengbo , Li Wenwu , Zhu Xianglong , Li Ying , Zhao Xiangmei , Shi Saige , Zhu Fengxiang , Lin Jinming , Gao Xia 
Published: August 2022

AbstractA photoredox and copper‐catalyzed sulfonylphosphorothiolation of alkenes has been developed. With the use of readily available aryl or alkyl sulfonyl chlorides as radical precursors and (RO)2P(O)SH as coupling partners, a wide range of decorated β‐sulfonyl phosphorothioates could be obtained in 37–98% yields with good functional group tolerance. Importantly, this three‐component reaction can be conveniently extended to late‐stage modification of bioactive molecules and gram‐scale synthesis.magnified image