DFT ‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging
In this study, the atomic-scale electric field and charge density distribution of WSe2 bi- and trilayers are revealed using an emerging microscopy technique, differential phase contrast (DPC) imaging in scanning transmission electron microscopy (STEM). For pristine material, a higher positive charge density located at the selenium atomic columns compared to the tungsten atomic columns is obtained and tentatively explained by a coherent scattering effect. Furthermore, the change in the electric field distribution induced by a missing selenium atomic column is investigated. A characteristic electric field distribution in the...
Source: Small - May 5, 2024 Category: Nanotechnology Authors: Maja Groll,
Julius B ürger,
Ioannis Caltzidis,
Klaus D. Jöns,
Wolf Gero Schmidt,
Uwe Gerstmann,
Jörg K. N. Lindner Tags: Research Article Source Type: research
LiF ‐Rich Solid Electrolyte Interphase Formation by Establishing Sacrificial Layer on the Separator
The controlled manipulation of Li+ movement by treating a fluorinated self-assembled monolayer as a sacrificial layer (FSL) on a boehmite-coated polyethylene (BPE) separator is demonstrated to establish a robust SEI layer. Due to the introduction of the FSL, a LiF-rich SEI is rapidly generated and deposited onto the LMA surface after cell assembly and 1st cycle stage. AbstractThe formation of a stable solid electrolyte interphase (SEI) layer is crucial for enhancing the safety and lifespan of Li metal batteries. Fundamentally, a homogeneous Li+ behavior by controlling the chemical reaction at the anode/electrolyte interfac...
Source: Small - May 4, 2024 Category: Nanotechnology Authors: Huding Jin,
Seonmi Pyo,
Harim Seo,
Jinil Cho,
Junghyup Han,
Juyeon Han,
Heejun Yun,
Heebae Kim,
Jeewon Lee,
Byeongyun Min,
Jeeyoung Yoo,
Youn Sang Kim Tags: Research Article Source Type: research
The Formation and Transformation of Low ‐Dimensional Carbon Nanomaterials by Electron Irradiation
This article reviews irradiation phenomena in graphene- or graphite-based nanomaterials from the scale of single atoms to tens of nanometers. Observations from the 1990s can now be explained on the basis of new results. The evolution of the understanding during three decades of research is presented, and the remaining problems are pointed out. (Source: Small)
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Florian Banhart Tags: Review Source Type: research
Hydrogen Bonding Competition Mediated Phase Separation with Abnormal Moisture ‐Induced Stiffness Boosting
The binary ionogel composed of an amphiphilic polymer network and a hydrophobic ionic liquid demonstrates an abnormal moisture-induced stiffness boosting, which is in complete contrast to water-induced softening of common polymer materials. Comprehensive understanding of this moisture-induced stiffening of the ionogel is achieved from multiscale perspectives, including molecular interactions, microphase separations, and macro mechanical performances. AbstractMoisture usually deteriorates polymers ’ mechanical performance owing to its plasticizing effect, causing side effects in their practical load-bearing applications. ...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Jian Xu,
Baohu Wu,
Lei Hou,
Peiyi Wu Tags: Research Article Source Type: research
Carbon Corrosion Induced by Surface Defects Accelerates Degradation of Platinum/Graphene Catalysts in Oxygen Reduction Reaction
Pt/Graphene electrocatalysts undergo severe carbon corrosion at high voltages (1.0 −1.6 V), leading to the weakening of the bonding between the supports and Pt NPs, causing a series of phenomena such as the damage of the carbon layer and the detachment and migrating agglomeration of Pt NPs, which seriously impair the performance of the catalysts. AbstractGraphene supported electrocatalysts have demonstrated remarkable catalytic performance for oxygen reduction reaction (ORR). However, their durability and cycling performance are greatly limited by Oswald ripening of platinum (Pt) and graphene support corrosion. Moreover,...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Xiong ‐Fei Li,
Fang‐Yuan Su,
Li‐Jing Xie,
Yan‐Ru Tian,
Zong‐Lin Yi,
Jia‐Yao Cheng,
Cheng‐Meng Chen Tags: Research Article Source Type: research
Ionic Pairs ‐Engineered Fluorinated Covalent Organic Frameworks Toward Direct Air Capture of CO2
A cascade structure engineering approach is developed to afford an ionic pair-functionalized fluorinated COF (F-COF). The sorbent is featured by ordered structure, high crystallinity, and abundant active sites for CO2 integration. Using 400 ppm CO2 as the feeding gas, high CO2 uptake capacity and facile sorbent regeneration is achieved. Operando spectroscopy-, X-ray-, and neutron-based techniques are deployed to afford information on the CO2 insertion pathway and thermodynamics. AbstractThe covalent organic frameworks (COFs) possessing high crystallinity and capability to capture low-concentration CO2 (400 ppm) from ai...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Liqi Qiu,
Ming Lei,
Caiqi Wang,
Jianzhi Hu,
Lilin He,
Alexander S. Ivanov,
De ‐en Jiang,
Hongfei Lin,
Ilja Popovs,
Yanpei Song,
Juntian Fan,
Meijia Li,
Shannon M. Mahurin,
Zhenzhen Yang,
Sheng Dai Tags: Research Article Source Type: research
Catalyst Supraparticles: Tuning the Structure of Spray ‐Dried Pt/SiO2 Supraparticles via Salt‐Based Colloidal Manipulation to Control their Catalytic Performance
This study underlines the importance of structural control in functional supraparticle design by spray-drying. AbstractThe structure of supraparticles (SPs) is a key parameter for achieving advanced functionalities arising from the combination of different nanoparticle (NP) types in one hierarchical entity. However, whenever a droplet-assisted forced assembly approach is used, e.g., spray-drying, the achievable structure is limited by the inherent drying phenomena of the method. In particular, mixed NP dispersions of differently sized colloids are heavily affected by segregation during the assembly. Herein, the influence o...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Philipp Groppe,
Jakob Reichstein,
Simon Carl,
Carlos Cuadrado Collados,
Bart ‐Jan Niebuur,
Kailun Zhang,
Benjamin Apeleo Zubiri,
Jörg Libuda,
Tobias Kraus,
Tanja Retzer,
Matthias Thommes,
Erdmann Spiecker,
Susanne Wintzheimer,
Karl Mandel Tags: Research Article Source Type: research
Conductive MXene/Polymer Composites for Transparent Flexible Supercapacitors
The synergistically interacting Ti3C2Tx/PEDOT:PSS composite is reported for all-solid-state transparent flexible symmetric supercapacitors with an outstanding areal capacitance of 3.1 mF cm−2, a high optical transparency of 61.6%, and excellent flexibility and durability, which hold significant promise for wearable and portable energy storage applications. AbstractTransparent flexible energy storage devices are limited by the trade-off among flexibility, transparency, and charge storage capability of their electrode materials. Conductive polymers are intrinsically flexible, but limited by small capacitance. Pseudocapac...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Shan Ren,
Xiangyu Pan,
Yangyang Zhang,
Jianlong Xu,
Zhifang Liu,
Xuanyi Zhang,
Xian Li,
Xu Gao,
Yanan Zhong,
Sheng Chen,
Sui ‐Dong Wang Tags: Research Article Source Type: research
Capillarity Constructed Open Siphon for Sustainable Drainage
Inspired by water drainage in the pitcher ofHeliamphora minor whose lid is too small to cover the pitcher, siphon-like flow in an open system is unveiled that 2 structures, trichomes and wedge, result in spontaneous wicking under asymmetric pressure difference and guiding the overflowing water in the wedge down to the root, which can improve the design of drainage system. AbstractSiphon is an effective method to transfer liquid from a higher to a lower level, which has many applications in hygienic design, clinical apparatus, and hydraulic engineering. Traditional operation requires energy to overcome gravity and establish...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Fenglin Chen,
Ziyang Cheng,
Can Gao,
Chuxin Li,
Chengqi Zhang,
Cunlong Yu,
Zhichao Dong,
Lei Jiang Tags: Research Article Source Type: research
N ‐methyl Formamide Electrolyte Additive Enabling Highly Reversible Zn Anodes
Herein, N-methyl formamide (NMF), a multi-function electrolyte additive is applied to enhance the electrochemical performance. Studied via advanced synchrotron radiation spectroscopy and DFT calculations, it is evidenced that NMF additive can simultaneously modify the Zn2+ solvation structure and ensure uniform zinc deposition, thus suppressing both parasitic side reactions and dendrites formation. AbstractParasitic side reactions and dendrites formation hinder the application of aqueous zinc ion batteries due to inferior cycling life and low reversibility. Against this background, N-methyl formamide (NMF), a multi-functio...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Peter Joseph Chimtali,
Xiya Yang,
Quan Zhou,
Shiqiang Wei,
Zeinab Mohamed,
Hassan Akhtar,
Aad Al ‐Mahgari,
Yuzhu Zhou,
Hanchen Xu,
Zijun Zhang,
Dengfeng Cao,
Shuangming Chen,
Kefu Zhu,
Xin Guo,
Hongwei Shou,
Xiaojun Wu,
Changda Wang,
Li Tags: Research Article Source Type: research
Tumor ‐On‐A‐Chip Models for Predicting In Vivo Nanoparticle Behavior
Tumor-on-a-chip models are promising devices for the prediction of nanoparticle behavior in living systems. In biological fluids, nanoparticles will acquire a protein corona that will affect nanoparticle behavior. In this review, the state of the art of tumor-on-a-chip models are summarized for investigating nanoparticle delivery advocating that corona formation and phagocytosing cells should receive more attention in the future. AbstractNanosized drug formulations are broadly explored for the improvement of cancer therapy. Prediction of in vivo nanoparticle (NP) behavior, however, is challenging, given the complexity of t...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Kim E. de Roode,
Khadijeh Hashemi,
Wouter P. R. Verdurmen,
Roland Brock Tags: Review Source Type: research
Borocarbonitride Catalyzed Ethylbenzene Oxidative Dehydrogenation: Activity Enhancement via Encapsulation of Mn Clusters inside the Tube
In this study, a groundbreaking hybrid catalyst is developed, featuring BCN nanotubes (BCNNTs) encapsulated with manganese (Mn) clusters, crafted through a meticulous supramolecular self-assembly and postcalcination strategy. This novel catalyst demonstrates a remarkable enhancement in activity, achieving 30% conversion and ≈100% selectivity toward styrene in ethylbenzene ODH reactions. Notably, its performance surpasses both pure BCNNTs and those hosting Mn nanoparticles. Structural and kinetic analyses unveil a robust interaction between BCNNTs and the Mn component, substantially boosting the catalytic activity of BCNN...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Xuefei Zhang,
Xueya Dai,
Zailai Xie,
Wei Qi Tags: Research Article Source Type: research
Hollow Cu/CoS2 Nanozyme with Defect ‐Induced Enzymatic Catalytic Sites and Binding Pockets for Highly Sensitive Fluorescence Detection of Alkaline Phosphatase
Inspired by active centers of natural enzymes consisting of catalytic sites and binding pockets, a Cu-doped CoS2 hollow nanocube (Cu/CoS2 HNCs) nanozyme integrating substitution defects and vacancies is developed through a defect engineering strategy. The vacancies and substitution defects of the developed Cu/CoS2 HNCs nanozymes can serve as binding pockets and catalytic sites as observed in natural enzymes, respectively. AbstractAlong with an ever-deepening understanding of the catalytic principle of natural enzymes, the rational design of high-activity biomimetic nanozymes has become a hot topic in current research. Insp...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Han Wang,
Ping Su,
Wenyu Wei,
Jiayi Song,
Yi Yang Tags: Research Article Source Type: research
Oxygen ‐Evolving Radiotherapy‐Radiodynamic Therapy Synergized with NO Gas Therapy by Cerium‐Based Rare‐Earth Metal‐Porphyrin Framework
A cerium metal-porphyrin framework encapsulated with L-Arg is constructed, which can be used to fight against the tumors by oxygen-evolving radiotherapy-radiodynamic therapy synergized with NO gas therapy. AbstractThe efficacy of traditional radiotherapy (RT) has been severely limited by its significant side effects, as well as tumor hypoxia. Here, the nanoscale cerium (Ce)-based metaloxo clusters (Ce(IV)6)-porphyrin (meso-tetra (4-carboxyphenyl) porphyrin, TCPP) framework loaded with L-arginine (LA) (denoted as LA@Ce(IV)6-TCPP) is developed to serve as a multifarious radio enhancer to heighten X-ray absorption and energy ...
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Jinyan Lin,
Yueyang He,
Yang Li,
Jianwu Chen,
Xiaolong Liu Tags: Research Article Source Type: research
Highly Flexible and Superelastic Graphene Nanofibrous Aerogels for Intelligent Sign Language
This study proposes a highly flexible and elastic graphene aerogel for wearable human-machine interfaces in sensor technology. (Source: Small)
Source: Small - May 3, 2024 Category: Nanotechnology Authors: Kai Pang,
Jingyu Ma,
Xian Song,
Xiaoting Liu,
Chengqi Zhang,
Yue Gao,
Kaiwen Li,
Yingjun Liu,
Yuxin Peng,
Zhen Xu,
Chao Gao Tags: Research Article Source Type: research
