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Total 3421 results found since Jan 2013.
Spontaneous Dewetting of Au ‐Thin Layers on Oxide‐ and Fluorine‐Terminated Single Crystalline Anatase and Efficient Use in Photocatalytic H2 Production
This study presents an investigation on the spontaneous dewetting behavior of thin Au layers on single-crystalline anatase nanosheets. Dewetting is facet-dependent and influenced by F-termination. For photocatalytic H2 production, F-termination and dewetted Au exhibit a strong co-catalytic synergy effect that leads to a significant improvement of the H2 evolution rate. AbstractIn the present work, the spontaneous dewetting of thin Au layers on single crystalline anatase nanosheets into narrow-disperse Au nanoparticles is investigated. Patterns of the Au particles can be formed on the main facets of anatase that provide a h...
Source: Small - June 26, 2023 Category: Nanotechnology Authors: Xin Zhou,
Si ‐Ming Wu,
Patrik Schmuki Tags: Research Article Source Type: research
Novel Biocompatible Magnetoelectric MnFe2O4 Core@BCZT Shell Nano –Hetero‐Structures with Efficient Catalytic Performance
Biocompatible magnetoelectric (ME) core –shell MnFe2O4/Ba0.85Ca0.15Zr0.1Ti0.9O3 nanoparticles (NPs) are developed via hydrothermal synthesis for the first time. The importance of the surface functionalization of MnFe2O4 cores with hydrophilic and hydrophobic agents for the hetero-structure formation with ferroelectric BCZT shell is revealed. ME NPs demonstrate 95% degradation of a model pollutant Rhodamine B under an external AC magnetic field treatment. AbstractMagnetoelectric (ME) small-scale robotic devices attract great interest from the scientific community due to their unique properties for biomedical applications....
Source: Small - June 26, 2023 Category: Nanotechnology Authors: Roman V. Chernozem,
Alina O. Urakova,
Polina V. Chernozem,
Danila A. Koptsev,
Yulia R. Mukhortova,
Irina Yu. Grubova,
Dmitry V. Wagner,
Evgeny Yu. Gerasimov,
Maria A. Surmeneva,
Andrei L. Kholkin,
Roman A. Surmenev Tags: Research Article Source Type: research
Bimetallic Nanoalloy Catalysts for Green Energy Production: Advances in Synthesis Routes and Characterization Techniques
Bimetallic Nanoalloys catalysts are strikingly popular for green energy production and storage. Synthetic methods such as chemical reduction, vapor deposition, pyrolysis, laser ablation, etc., can improve the alloy catalytic activity for hydrogen evolution reactions, oxygen reduction reactions, oxygen evolution reactions, and alcohol oxidation reactions. In combination with transition and other metals, Nobel metals can create highly efficient electrocatalysts. AbstractBimetallic Nanoalloy catalysts have diverse uses in clean energy, sensing, catalysis, biomedicine, and energy storage, with some supported and unsupported ca...
Source: Small - June 25, 2023 Category: Nanotechnology Authors: Saima Ashraf,
Yanyan Liu,
Huijuan Wei,
Ruofan Shen,
Huanhuan Zhang,
Xianli Wu,
Sehrish Mehdi,
Tao Liu,
Baojun Li Tags: Review Source Type: research
WO3 ‐Assisted Synergetic Effect Catalyzes Efficient and CO‐Tolerant Hydrogen Oxidation for PEMFCs
A novel synergic catalytic mechanism about excellent CO tolerance is proposed, in which Pd and WO3 respectively absorb CO and H2O, thus resulting in CO electrooxidation and re-exposure of Pd active sites, which reveal the practical application prospects of employing economic crude hydrogen as fuel in PEMFCs. AbstractDeveloping anode catalysts with substantially enhanced activity for hydrogen oxidation reaction (HOR) and CO tolerance performance is of great importance for the commercial applications of proton exchange membrane fuel cells (PEMFCs). Herein, an excellent CO-tolerant catalyst (Pd-WO3/C) has been fabricated by l...
Source: Small - June 21, 2023 Category: Nanotechnology Authors: Han Tian,
Xu Yu,
Weimin Huang,
Ziwei Chang,
Fenglai Pei,
Jiangdong Zhou,
Ningning Dai,
Ge Meng,
Chang Chen,
Xiangzhi Cui,
Jianlin Shi Tags: Research Article Source Type: research
A Self ‐Disguised Nanospy for Improving Drug Delivery Efficiency via Decreasing Drug Protonation
Nanoscale drug carriers play a crucial role in reducing side effects of chemotherapy drugs. However, the MPS and the drug protonation after NPs burst release still limit the drug delivery efficiency. In this work, a self-disguised Nanospy is designed to overcome this problem. AbstractNanoscale drug carriers play a crucial role in reducing side effects of chemotherapy drugs. However, the mononuclear phagocyte system (MPS) and the drug protonation after nanoparticles (NPs) burst release still limit the drug delivery efficiency. In this work, a self-disguised Nanospy is designed to overcome this problem. The Nanospy is compos...
Source: Small - June 21, 2023 Category: Nanotechnology Authors: Kuo Zhang,
Zi ‐Qi Wang,
Zhongqing Liu,
Tianrui Qu,
Zhishuai Zhang,
Fanshu Zeng,
Hongjian Song,
Qing Shi,
Zhijian Kang,
Bogong Chen,
Peng Dai,
Pengyu Guo,
Zhichao Tong,
Wanhai Xu Tags: Research Article Source Type: research
A Selective Nano Cell Cycle Checkpoint Inhibitor Overcomes Leukemia Chemoresistance (Small 25/2023)
Nano Cell Cycle Checkpoint InhibitorsIn article number2300736, Daishun Ling, Fangyuan Li, and co-workers demonstrate that ultra-small iron oxide nanoparticles (IONPs) can serve as a selective nano cell cycle checkpoint inhibitor (NCCI) to catalyze the intracellular H2O2 into abundant ·OH, cleave heat shock protein 90 (Hsp90), and thus induce the degradation of the client protein ATR/CHK1, leading to the dysfunction of the G2/M checkpoint in acute myeloid leukemia (AML) cells. As a result, NCCI can interfere with the chemotherapy-induced DNA damage repair, which effectively reve rses the chemoresistance of acute myeloid leukemia.
Source: Small - June 21, 2023 Category: Nanotechnology Authors: Jie Sun,
Fan Xia,
Shaoqi Zhang,
Bo Zhang,
Yunan Guan,
Xi Hu,
Pengpeng Xue,
Shengfei Yang,
Yan Zhou,
Daishun Ling,
Fangyuan Li Tags: Frontispiece Source Type: research
Anion Exchange of Metal Particles on Carbon ‐Based Skeletons for Promoting Dielectric Equilibrium and High‐Efficiency Electromagnetic Wave Absorption
A new design scheme to improve the dielectric properties and achieve an enhancement of the magnetic loss capability at small sizes is proposed. The small size effect of nanoparticles allows the magnetic energy to change with size, achieving impedance matching optimization. The optimal performance with RLmin of -105.9 dB and EABmax of 7.68 GHz are achieved. AbstractThe combination of carbon materials and magnetic elements is considered as an effective strategy to obtain high-performance electromagnetic wave (EMW) absorption materials. However, using nanoscale regulation to the optimization of composite material dielectric p...
Source: Small - June 21, 2023 Category: Nanotechnology Authors: Tianqi Hou,
Jianwei Wang,
Tingting Zheng,
Yue Liu,
Guanglei Wu,
Pengfei Yin Tags: Research Article Source Type: research
Establishing Transition Metal Phosphides as Effective Sulfur Hosts in Lithium –Sulfur Batteries through the Triple Effect of “Confinement–Adsorption–Catalysis”
In this study, a CoP nanoparticle-doped hollow ordered mesoporous carbon sphere (CoP-OMCS) is developed as a S host with a “Confinement–Adsorption–Catalysis” triple effect for Li–S batteries. The Li-S batteries with CoP-OMCS/S cathode demonstrate excellent per formance, delivering a discharge capacity of 1148 mAh g−1 at 0.5 C and good cycling stability with a low long-cycle capacity decay rate of 0.059% per cycle. Even at a high current density of 2 C after 200 cycles, a high specific discharge capacity of 524 mAh g−1 is maintained. Moreover, a reversible areal capacity of 6.56 mAh cm−2 is achieved after 10...
Source: Small - June 18, 2023 Category: Nanotechnology Authors: Fangzheng Wang,
Yuying Han,
Rui Xu,
Ang Li,
Xin Feng,
Shengyao Lv,
Tao Wang,
LeLe Song,
Jing Li,
Zidong Wei Tags: Research Article Source Type: research
Tetrahedral Bonding Structure (Ni3 ‐Se) Induced by Lattice‐Distortion of Ni to Achieve High Catalytic Activity in Na–Se Battery
This study finds that lattice-distorted nickel (Ni) structure can form different bonding structures wi th Na2Se4, providing high activity to catalyze the electrochemical reactions in Na –Se batteries. Using this Ni structure to prepare electrode (Se@NiSe2/Ni/CTs) can realize rapid charge transfer and high cycle stability of the battery. The electrode exhibits high storage performance of Na+; i.e., 345 mAh g⁻1 at 1 C after 400 cycles, and 286.4 mAh g⁻1 at 10 C in rate performance test. Further results reveal the existence of a regulated electronic structure with upshifts of the d-band center in the distorted Ni...
Source: Small - June 18, 2023 Category: Nanotechnology Authors: Jiayin Li,
Cheng Qian,
Yunfei Hu,
Jianfeng Huang,
Guanjun Chen,
Liyun Cao,
Fangmin Wang,
Koji Kajiyoshi,
Yong Zhao,
Yijun Liu,
Zhenjiang Li,
Hong Yang,
Zhanwei Xu Tags: Research Article Source Type: research
Homologous Heterostructured NiS/NiS2@C Hollow Ultrathin Microspheres with Interfacial Electron Redistribution for High ‐Performance Sodium Storage
In this work, the hierarchical hollow microspheres are assembled from heterostructured NiS/NiS2 nanoparticles confined by in situ carbon layer (H-NiS/NiS2@C) via regulating the sulfidation temperature of the Ni-MOFs precursor. The abundant heterogenous interfaces induce built-in electric field and interfacial electron redistribution, thus intrinsically enhance the electronic conductivity and ion migration/adsorption, which exhibits superior sodium storage performance. AbstractNickel sulfides with high theoretical capacity are considered as promising anode materials for sodium-ion batteries (SIBs); however, their intrinsic ...
Source: Small - June 16, 2023 Category: Nanotechnology Authors: Qingping Li,
Ransha Deng,
Yuxiang Chen,
Juan Gong,
Peng Wang,
Qiaoji Zheng,
Yu Huo,
Fengyu Xie,
Xijun Wei,
Chenhui Yang,
Dunmin Lin Tags: Research Article Source Type: research
Tailor ‐Made Autophagy Cascade Amplification Polymeric Nanoparticles for Enhanced Tumor Immunotherapy (Small 24/2023)
Enhanced Tumor ImmunotherapiesTailor-made polymeric nanoparticles with the function of autophagy cascade amplification due to the co-delivery of autophagy inducer STF-62247 and antitumor drug epirubicin, which could assist cell uptake and tumor penetration with the help of arginine and promote immunogenic cell death by the enhancement of autophagy for the best tumor immunotherapy effect. More details can be found in article number2207898 by Yong Sun, Yan Liang, and co-workers.
Source: Small - June 14, 2023 Category: Nanotechnology Authors: Xuehua Long,
Huiqi Wang,
Jianqin Yan,
Yifei Li,
Xue Dong,
Sijia Tian,
Yong Sun,
Kui Luo,
Bin He,
Yan Liang Tags: Cover Picture Source Type: research
2D MoS2 Nanosheets Induce Ferroptosis by Promoting NCOA4 ‐Dependent Ferritinophagy and Inhibiting Ferroportin (Small 24/2023)
2D MoS2 NanosheetsMoS2 nanosheets accumulate Fe2+ in lysosomes by promoting NCOA4-dependent ferritinophagy. Fe2+ leaks from the damaged lysosomes into the cytoplasm, resulting in ferroptosis. This has important implications for elucidating the toxicity of 2D nanoparticles and determining their medical applications. More details can be found in article number2208063 by Wei Jiang and co-workers.
Source: Small - June 14, 2023 Category: Nanotechnology Authors: Bingyan Liu,
Wei Jiang,
Yiyuan Ye,
Ling Liu,
Xiaoran Wei,
Qiu Zhang,
Baoshan Xing Tags: Frontispiece Source Type: research
Ionizable Lipid with Supramolecular Chemistry Features for RNA Delivery In Vivo
In this report, supramolecular chemistry concepts are incorporated into the rational design of a new ionizable lipid, C3-K2-E14, for systemic administration. This lipid incorporates a cone-shaped structure intended to facilitate cell bilayer disruption, and three tertiary amines to improve RNA binding. Additionally, hydroxyl and amide motifs are incorporated to further enhance RNA binding and improve LNP stability. Optimization of messenger RNA (mRNA) and small interfering RNA (siRNA) formulation conditions and lipid ratios produce LNPs with favorable diameter (<150 nm), polydispersity index (<0.15), and RNA encaps...
Source: Small - June 14, 2023 Category: Nanotechnology Authors: Alanna M. Manning,
Grayson Tilstra,
Aniqa B. Khan,
Julien Couture ‐Senécal,
Yan Ming Anson Lau,
Janice Pang,
Amina A. Abow,
Clinton S. Robbins,
Omar F. Khan Tags: Research Article Source Type: research
Enabling Specific Benzene Oxidation by Tuning the Adsorption Behavior on Au Loaded MgAl Layered Double Hydroxides
Herein, a single-atom Au loaded MgAl-layered double hydroxide (Au1-MgAl-LDH) with Au-O4 coordination is reported. The photocatalytic results prove the Au1-MgAl-LDH is capable of driving benzene oxidation reaction with O2 in water, and exhibits a high selectivity of 99% for phenol. AbstractDirect and selective oxidation of benzene to phenol is a long-term goal in industry. Although great efforts have been made in homogenous catalysis, it still remains a huge challenge to drive this reaction via heterogeneous catalysts under mild conditions. Herein, a single-atom Au loaded MgAl-layered double hydroxide (Au1-MgAl-LDH) with a ...
Source: Small - June 14, 2023 Category: Nanotechnology Authors: Tianyang Shen,
Ziheng Song,
Jiaxin Li,
Sha bai,
Guihao Liu,
Xiaoliang Sun,
Shaoquan Li,
Wei Chen,
Lirong Zheng,
Yu ‐Fei Song Tags: Research Article Source Type: research
Microfluidic Synthesis of Ultrasmall Chitosan/Graphene Quantum Dots Particles for Intranasal Delivery in Alzheimer's Disease Treatment
The ultrasmall chitosan/graphene quantum dots nanoparticles are developed via microfluidic technique with optimized properties for brain targeting as theranostic agents in Alzheimer's disease (AD). Although the nanoparticles exhibit no effect on amyloidβ plaque clearance and MAP2 and NeuN expression in treated brains, they can positively impact memory recovery after their intranasal delivery to the brain of AD rat models. AbstractNanoparticles (NPs) based therapies for Alzheimer's disease (AD) attract interest due to their ability to pass across or bypass the blood-brain barrier. Chitosan (CS) NPs or graphene quantum dots...
Source: Small - June 13, 2023 Category: Nanotechnology Authors: Fariba Mohebichamkhorami,
Mehrdad Faizi,
Matin Mahmoudifard,
Arman Hajikarim ‐Hamedani,
Seyedeh Sarvenaz Mohseni,
Amirhossein Heidari,
Yekta Ghane,
Mona Khoramjouy,
Maryam Khayati,
Rasoul Ghasemi,
Hakimeh Zali,
Simzar Hosseinzadeh,
Ebrahim M Tags: Research Article Source Type: research
