• Issue
    Volume 6, Issue 9
    September 20, 2022

Cover Picture

Free Access

Ion-Exchange Strategy for Metal-Organic Frameworks-Derived Composites with Tunable Hollow Porous and Microwave Absorption (Small Methods 9/2022)

  • First Published: 19 September 2022
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Front Cover

In article number 2200429, Zhou, Li, Ou, and co-workers developed a universal ion-exchange and in-situ pyrolysis strategy to co-regulate structural morphologies and chemical contents of metal-organic framework derivatives, achieving enhanced microwave absorption performances.

Inside Front Cover

Free Access

An Effective Strategy of Introducing Chirality to Achieve Multifunctionality in Rare-Earth Double Perovskite Ferroelectrics (Small Methods 9/2022)

  • First Published: 19 September 2022
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Inside Front Cover

In article number 2200421, Song, You, Zhang, and co-workers found that the introduction of chirality is an efficient strategy for the targeted construction of multifunctionality, which simultaneously increased the possibility of obtaining multiaxial ferroelectricity and ferroelasticity, and effectively realized a large piezoelectric response. Moreover, chirality-induced ferroelasticity would also achieve excellent magnetic or optical response driven by pressure.

Inside Back Cover

Free Access

Micromolding of Thermoplastic Polymers for Direct Fabrication of Discrete, Multilayered Microparticles (Small Methods 9/2022)

  • First Published: 19 September 2022
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Inside Back Cover

In article number 2200232, Jaklenec, and co-workers break the mold. Direct fabrication of shape-specific, discrete, and 3D microstructures is reported from any thermoplastic polymers irrespective of their chemical structures or molecular weights using a newly designed, highly non-wetting template. This exceptional surface property emanates from preferential orientation of pendant, highly fluorinated side groups of the new polymer to the surface, making it non-wetting to any organic materials.

Back Cover

Free Access

Bridging the Gap between Single Nanoparticle Imaging and Global Electrochemical Response by Correlative Microscopy Assisted By Machine Vision (Small Methods 9/2022)

  • First Published: 19 September 2022
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Back Cover

In article number 2200659, Lemineur, Kanoufi, and co-workers present a machine vision automatized analysis of the electrochemistry of a thousand individual nanoparticles from multi-complementary operando optical and ex situ microscopies. Seeing the whole unveil electrocatalytic hydrogen evolution by Ni.

Masthead

Free Access

Masthead: (Small Methods 9/2022)

  • First Published: 19 September 2022

Reviews

Achieving and Understanding of Highly Efficient Ternary Organic Photovoltaics: From Morphology and Energy Loss to Working Mechanism

  • First Published: 05 August 2022
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Ternary blend is a widely used strategy for higher efficiencies in organic photovoltaics. In this review, recent high-efficiency works applying ternary strategy from three views of morphology, energy loss, and working mechanism are summarized, thus providing a comprehensive understanding on the role of third component.

Progress on Fe-Based Polyanionic Oxide Cathodes Materials toward Grid-Scale Energy Storage for Sodium-Ion Batteries

  • First Published: 03 July 2022
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The Fe-based sodium-ion batteries with earth-abundant elements, environmental friendliness, and safety are very promising to be the substitute for lithium-ion batteries in impending grid-scale energy storage. Compared to the transition metal oxide and Prussian blue analogs, the Fe-based polyanionic oxide cathodes possess high thermal stability, ultra-long cycle life, and adjustable voltage, which will be more commercially viable in the future.

A Review on 3D Zinc Anodes for Zinc Ion Batteries

  • First Published: 19 July 2022
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In this review, the challenges and energy storage mechanisms of zinc anodes are summarized. Importantly, 3D zinc anodes with different structures are generalized in detail, including fiber, porous, ridge-like structure, plated zinc anodes on different substrates, and other 3D zinc anodes. Furthermore, some views for 3D zinc anodes are put forward on the solutions and the future development direction.

Theoretical Understanding of Polar Topological Phase Transitions in Functional Oxide Heterostructures: A Review

  • First Published: 28 July 2022
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The exotic topological phase attracts considerable attention worldwide. Herein, the current understanding of the polar topological structures in functional oxide heterostructures is summarized, for example, in the PbTiO3/SrTiO3 superlattice. The important role of computational tools such as phase-field simulations in designing polar topological phases is highlighted.

Polymorphic Phosphorus Applied to Alkali-Ion Battery Electrodes

  • First Published: 10 August 2022
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The present applications of amorphous red and black phosphorus for the electrodes of alkali-ion batteries may lead the fibrous red and violet ones into this research field as well in the near future.

Research Articles

Open Access

Ion-Exchange Strategy for Metal-Organic Frameworks-Derived Composites with Tunable Hollow Porous and Microwave Absorption

  • First Published: 08 June 2022
Description unavailable

The facile ion-exchange strategy is provided to regulate the structure and microwave absorbing performance of the metal-organic frames derivative. Specifically, not only the Ni2+ concentration is adjusted to get a suitable cavity, but also the components, interfaces, defects, and polar groups are improved by thermodynamic regulation, thus achieving enhanced performance that results in the best impedance matching and electromagnetic attenuation.

An Effective Strategy of Introducing Chirality to Achieve Multifunctionality in Rare-Earth Double Perovskite Ferroelectrics

  • First Published: 05 July 2022
Description unavailable

Introducing chiral cations, a pressure-responsive hybrid rare-earth perovskites, (R-N-methyl-3-hydroxylquinuclidinium)2RbCe(NO3)6, is constructed. (R-N-methyl-3-hydroxylquinuclidinium)2RbCe(NO3)6 exhibits satisfactory piezoelectric properties when combined with multiaxial ferroelectricity and ferroelasticity, with a piezoelectric charge constant of 104 pC N–1 and piezoelectric voltage constant of 420 × 10−3 V m N−1. Furthermore, the presence of ferroelasticity, allied with single-ion magnetics (SIMs) behavior, brings about piezomagnetic on/off switching.

Open Access

Micromolding of Thermoplastic Polymers for Direct Fabrication of Discrete, Multilayered Microparticles

  • First Published: 28 June 2022
Description unavailable

Break the mold! Direct fabrication of shape-specific, discrete, and 3D microstructures is reported from any thermoplastic polymers irrespective of their chemical structures or molecular weights using a newly designed, highly nonwetting template. This exceptional surface property emanates from preferential orientation of long, pendant, highly fluorinated side groups to the surface, making it nonwetting to any organic materials to be molded.

Bridging the Gap between Single Nanoparticle Imaging and Global Electrochemical Response by Correlative Microscopy Assisted By Machine Vision

  • First Published: 05 July 2022
Description unavailable

A machine-vision methodology is depicted enabling the automated identification of various descriptors of ≈1000 individual nanoparticles (size, position, composition, activity) obtained from multiple complementary operando optical monitoring and ex situ microscopy imaging of electrochemical reactions. Comparing the contribution of all individual nanoparticles with the electrochemical response unveils the electrocatalysis of hydrogen evolution by Ni metal.

Frontispiece

Free Access

Probing the Structural Details of Chitin Nanocrystal–Water Interfaces by Three-Dimensional Atomic Force Microscopy (Small Methods 9/2022)

  • First Published: 19 September 2022
Description unavailable

Chitin Nanocrystal Structure

In article number 2200320, Yurtsever, Fukuma, and co-workers provided the molecular-scale structural details of chitin nanocrystals in water by combining 3D atomic force microscopy experiments and molecular dynamics simulations. The characterization of chitin nanocrystal surfaces at the molecular scale could pave the way for assessing the chemical and enzymatic activities on chitin nanocrystals, offering an understanding of the mechanisms of chitin degradation.

Research Articles

Open Access

Probing the Structural Details of Chitin Nanocrystal–Water Interfaces by Three-Dimensional Atomic Force Microscopy

  • First Published: 09 June 2022
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The molecular-scale structural details of the chitin nanocrystal–water interface are characterized using the 3D atomic force microscopy combined with molecular dynamics simulations. The characterization of chitin nanocrystal surfaces at the atomic/molecular resolution paves the way for assessing the chemical and enzymatic activities on chitin nanocrystals, offering understanding of the mechanisms of chitin degradation, which is crucial for biomass conversion.

Frontispiece

Free Access

MAX-phase Derived Tin Diselenide for 2D/2D Heterostructures with Ultralow Surface/Interface Transport Barriers toward Li-/Na-ions Storage (Small Methods 9/2022)

  • First Published: 19 September 2022
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Ion Transport Barriers

In article number 2200658, Mei, Sun, and co-workers proposed a tin-extracted synthetic strategy for producing tin diselenide by using MAX-phase precursors. After coupled with graphene, the 2D heterostructure shows low surface/interface transport barriers in rechargeable Li-/Na-ion batteries.

Research Articles

Open Access

MAX-phase Derived Tin Diselenide for 2D/2D Heterostructures with Ultralow Surface/Interface Transport Barriers toward Li-/Na-ions Storage

  • First Published: 08 July 2022
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The large-scale synthesis of tin diselenide crystals is innovatively achieved via a one-step selenization reaction by using the Sn-containing MAX-phase, and the assembled 2D/2D SnSe2/graphene heterostructures deliver ultralow Li/Na-ion transport barriers for rechargeable batteries, as confirmed by theoretical and experimental evidence.

A Reliable and Precise Protocol for Urea Quantification in Photo/Electrocatalysis

  • First Published: 05 July 2022
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A precise and methodical protocol for urea quantification or evaluation in photo/electrocatalysis is explored and established after thorough investigation and exploration of the superiorities and limitations of the frequently used urea quantitative methods in emerging photo/electrocatalytic urea synthesis, with emphasis on the screening quantitative methods under specific conditions and indispensable isotopic tracing experiments.

Quantification-Promoted Discovery of Glycosylated Exosomal PD-L1 as a Potential Tumor Biomarker

  • First Published: 10 July 2022
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An aptamer- and lectin-induced proximity ligation assay combined with quantitative real-time polymerase chain reaction for precise quantitation of glycosylated exoPD-L1 is developed. Leveraging the metabolism-free lectin labeling of glycosylation, the glycosylation-independent aptamer tagging of PD-L1, and excellent selectivity of dual-recognition, this method enables glycosylated exoPD-L1 quantitation with high sensitivity and selectivity in a wash-free manner.

Open Access

Cracks as Efficient Tools to Mitigate Flooding in Gas Diffusion Electrodes Used for the Electrochemical Reduction of Carbon Dioxide

  • First Published: 10 July 2022
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Newly developed approach combining scanning electron microscopy, energy dispersive X-ray spectroscopy, and inductively coupled plasma-mass spectrometry is applied to investigate electrolyte flooding in gas diffusion electrodes for the electrochemical reduction of carbon dioxide. It is demonstrated that cracks in the microporous layer serve as efficient pathways for draining excess electrolyte allowing flooding-related performance losses to be avoided.

Hierarchical Porous Cellulosic Triboelectric Materials for Extreme Environmental Conditions

  • First Published: 08 July 2022
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Inspired by natural bamboo, this study reports a “three-step” strategy for the mass production of cellulosic triboelectric materials with resistance to extreme environmental conditions. It achieves high triboelectric properties with a working area of only 1 cm2. More importantly, it can maintain 85% energy harvesting and meet diverse self-powered induction even after resisting extreme environmental conditions.

Synthesis of Patchy Nanoparticles with Symmetry Resembling Polar Small Molecules

  • First Published: 22 July 2022
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The hydrolysis and condensation of tetraethyl orthosilicate on block-random copolymer ligands induces the segregation of copolymers on gold nanoparticles and hence governs the structure and distribution of silica patches formed on the nanoparticles, resembling the geometry of polar small molecules (e.g., H2O, NH3).

Synergistic Incorporating RuO2 and NiFeOOH Layers onto Ni3S2 Nanoflakes with Modulated Electron Structure for Efficient Water Splitting

  • First Published: 22 July 2022
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Novel tremella-like Ni3S2@RuO2/NF and Ni3S2@NiFeOOH/NF heterostructures catalysts by coupling RuO2 and NiFeOOH on Ni3S2 nanoflakes exhibit excellent hydrogen and oxygen evolution reaction catalytic activity. Heterogenous configuration induces electron transfer from Ni3S2 to RuO2 through NiRu/SRu bonds, and thus tailors the d-band center and optimizes the activated H2O/H* Gibbs free energies for enhanced hydrogen evolution reaction on Ni3S2@RuO2.

Rational Design of WSe2/WS2/WSe2 Dual Junction Phototransistor Incorporating High Responsivity and Detectivity

  • First Published: 24 July 2022
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An ingenious phototransistor based on WSe2/WS2/WSe2 dual-van der Waals heterostructures is constructed, performing both high responsivity, light on/off ratio and detectivity in the charge neutrality point. This high performance is ascribed to the distinctive device design, which not only facilitates the separation of photogenerated carriers but also produces a strong photogating effect.

Modulating the Electronic Structure of RuO2 through Cr Solubilizing for Improved Oxygen Evolution Reaction

  • First Published: 25 July 2022
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The Cr incorporation changes the electron distribution of RuO2 which decreases the d-band center of Ru and the energy barrier of *OOH adsorbed on RuO2 (1 1 0), thus being favorable to the activity of oxygen evolution reaction in acidic electrolyte. Additionally, the oxidation resistance of Ru is significantly reinforced by inhibiting the lattice O oxidation mechanism pathway, resulting in enhanced stability.

Polycrystalline InGaO Thin-Film Transistors with Coplanar Structure Exhibiting Average Mobility of ≈78 cm2 V-1 s-1 and Excellent Stability for Replacing Current Poly-Si Thin-Film Transistors for Organic Light-Emitting Diode Displays

  • First Published: 25 July 2022
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Hotplate annealing of amorphous InGaO thin film at 350 °C in air environment and subsequent heating at 300 °C under N2O environment yield a highly aligned polycrystalline InGaO. It can be applied to the thin-film transistor exhibiting an average μsat of ≈78.73 cm2 Vs−1 with excellent bias and environmental stabilities.

Holistic Analysis of Glioblastoma Stem Cell DNA Using Nanoengineered Plasmonic Metasensor for Glioblastoma Diagnosis

  • First Published: 30 July 2022
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Glioblastoma (GBM) diagnosis using liquid biopsy suffers limitations due to biological and practical limitations. This research introduces nanoengineered plasmonic metasensors with sub-single molecule level sensitivity to detect GBM biomarkers in blood accurately and in under 10 min. This methodology is noninvasive and amplification free with a high diagnostic accuracy of 98.7%.

Editor's Choice

Open Access

High-Throughput Generation of 3D Graphene Metamaterials and Property Quantification Using Machine Learning

  • First Published: 29 July 2022
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High-throughput graphene foams generation and artificial intelligence (AI)-based quantification. Given excellent performances of 3D graphene assemblies, their structural diversity and complexity hinder throughout examination of their properties. This study combines high-throughput method with AI-based approaches to generate 4000+ graphene foams and quantify global and local behaviors with AI models, providing novel and fundamental insights about 3D graphene materials.

Multi-Phenotypic Exosome Secretion Profiling Microfluidic Platform for Exploring Single-Cell Heterogeneity

  • First Published: 28 July 2022
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In this work, an integrated microfluidic platform consisting of a single-cell trapping chip and a spatially coded antibody barcode chip has been developed for the multiplexed profiling of exosome secretion at single-cell resolution. Also, a robust and easy-to-use analysis workflow to analyze single-cell secretion data is proposed to identify potential functional cell subpopulations and explore the cancer intercellular heterogeneity.

Facile Synthesis of Conductive Metal−Organic Frameworks Nanotubes for Ultrahigh-Performance Flexible NO Sensors

  • First Published: 05 August 2022
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A simple and eco-friendly approach is proposed to prepare Cu-BHT nanotubes (Cu-BHT-NTs) with a high specific surface area and a large proportion of Cu2c, offering more active sites to detect NO gas. This endows that the DPPTT/Cu-BHT-NTs heterostructure sensor has excellent selectivity and sensitivity. Furthermore, a fully flexible sensor is successfully fabricated to demonstrate its potential application in wearable electronics.

Open Access

Intensity Modulated Photocurrent Microspectrosopy for Next Generation Photovoltaics

  • First Published: 16 August 2022
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A large-area laser beam induced current microscope adapted to perform intensity modulated photocurrent spectroscopy in an imaging mode is introduced for the first time and applied to study the degradation of a back-contact perovskite solar cell. Diffusion-recombination modeling of the spatio-frequency data allows the extraction of images for key device parameters such as the ambipolar diffusion length.

Open Access

Patterned Growth of Transition Metal Dichalcogenide Monolayers and Multilayers for Electronic and Optoelectronic Device Applications

  • First Published: 11 August 2022
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A simple, inexpensive, and reproducible soft lithographic method is demonstrated for the area selective chemical vapor deposition growth of 2D transition metal dichalcogenide (TMD) monolayers and multilayers. The application possibilities of the patterned TMDs are demonstrated in field effect transistors, high responsivity photodetectors, and memtransistor devices.

Near-Infrared-II Light Induced Mild Hyperthermia Activate Cisplatin-Artemisinin Nanoparticle for Enhanced Chemo/Chemodynamic Therapy and Immunotherapy

  • First Published: 17 August 2022
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A highly efficient metal-free chemodynamic therapy (CDT) using endoperoxide bridge-containing artesunate is developed. To improve the catalytic efficiency for Fenton reaction, a near-infrared-II (NIR-II) photothermal agent is incorporated to activate CDT through mild hyperthermia effect. This work demonstrates that A-Pt-IR NP are potent biodegradable NIR-II active chemotherapy/CDT nanomedicine for immunotherapy.