journal
https://read.qxmd.com/read/38758021/a-hydrogel-functionalized-silver-nanocluster-for-bacterial-infected-wound-healing
#41
JOURNAL ARTICLE
Zhezhen Wei, Tingting Xu, Cong Wang, Shuai Liu, Wenjing Zhang, Jianan Sun, Huan Yu, Hui Shi, Yongbo Song
The ever-growing challenges of traditional antibiotic therapy and chronic wound healing have created a hot topic for the development and application of new antimicrobial agents. Silver nanoclusters (Ag NCs) with ultrasmall sizes (<2 nm) and antibacterial effects are promising candidates for next-generation antibiotics, particularly against multi-drug resistant strains. However, the biosafety in the clinical application of Ag NCs remains suboptimal despite some existing studies of Ag NCs for biomedical applications...
May 17, 2024: Nanoscale
https://read.qxmd.com/read/38757983/mitigating-substrate-effects-of-van-der-waals-semiconductors-using-perfluoropolyether-self-assembled-monolayers
#42
JOURNAL ARTICLE
Dae Young Park, Hyeong Chan Suh, Seungho Bang, Ju Chan Lee, Jaekak Yoo, Hayoung Ko, Soo Ho Choi, Ki Kang Kim, Seung Mi Lee, Seong Chu Lim, Tschang-Uh Nahm, Mun Seok Jeong
The properties of transition metal dichalcogenides (TMDCs) are critically dependent on the dielectric constant of substrates, which significantly limits their application. To address this issue, we used a perfluorinated polyether (PFPE) self-assembled monolayer (SAM) with low surface energy to increase the van der Waals (vdW) gap between TMDCs and the substrate, thereby reducing the interaction between them. This resulted in a reduction in the subthreshold swing value, an increase in the photoluminescence intensity of excitons, and a decrease in the doping effect by the substrate...
May 17, 2024: Nanoscale
https://read.qxmd.com/read/38757969/engineering-co-3-o-4-3dom-lacoo-3-multistage-pore-nanoreactor-with-superior-so-2-resistance-for-toluene-catalytic-combustion
#43
JOURNAL ARTICLE
Zhan Shi, Fang Dong, Weiliang Han, Xiuyan Dong, Zhicheng Tang
Sulfur dioxide poisoning is a significant factor in catalyst deactivation during the catalytic combustion of volatile organic compounds. In this study, we prepared the LaCoO3 and Co3 O4 composite catalysts using both the Ship-in-Bottle and Building-Bottle-Around-Ship approaches. Three-dimensionally ordered macropores (3DOM LaCoO3 ) were utilized as nanoreactors to protect the active sites during the catalytic combustion of toluene, preventing SO2 poisoning. Additionally, we grew ZIF-67 confined in the nanoreactor to create a multistage-pore structure...
May 17, 2024: Nanoscale
https://read.qxmd.com/read/38757953/luminescence-enhancement-through-co-sensitization-in-lanthanide-composites-for-efficient-photocatalysis
#44
JOURNAL ARTICLE
Langtao Ren, Qing Zhao, Yan Su, Mingzhu Zhou, Qianqian Su
Lanthanide-doped nanocrystals that convert near-infrared (NIR) irradiation into shorter wavelength emission (ultraviolet-C) offer many exciting opportunities for biomedicine, bioimaging, and environmental catalysis. However, developing lanthanide-doped nanocrystals with high UVC brightness for efficient photocatalysis is a formidable challenge due to the complexity of the multiphoton process. Here, we report a series of heterogeneous core-multishell structures based on a co-sensitization strategy with multi-band enhanced emission profiles under 980 nm excitation...
May 17, 2024: Nanoscale
https://read.qxmd.com/read/38757536/advanced-micro-nano-electroporation-for-gene-therapy-recent-advances-and-future-outlook
#45
REVIEW
Feng Liu, Rongtai Su, Xinran Jiang, Siqi Wang, Wei Mu, Lingqian Chang
Gene therapy is a promising disease treatment approach by editing target genes, and thus plays a fundamental role in precision medicine. To ensure gene therapy efficacy, the effective delivery of therapeutic genes into specific cells is a key challenge. Electroporation utilizes short electric pulses to physically break the cell membrane barrier, allowing gene transfer into the cells. It dodges the off-target risks associated with viral vectors, and also stands out from other physical-based gene delivery methods with its high-throughput and cargo-accelerating features...
May 17, 2024: Nanoscale
https://read.qxmd.com/read/38757357/electrochemical-reconstruction-of-a-1d-cu-pydc-h-2-o-mof-into-in-situ-formed-cu-cu-2-o-heterostructures-on-carbon-cloth-as-an-efficient-electrocatalyst-for-co-2-conversion
#46
JOURNAL ARTICLE
Manjunatha Kempasiddaiah, Rajib Samanta, Sonali Panigrahy, Ravi Kumar Trivedi, Brahmananda Chakraborty, Sudip Barman
Electrochemical carbon dioxide (CO2 ) conversion has enormous potential for reducing high atmospheric CO2 levels and producing valuable products simultaneously; however the development of inexpensive catalysts remains a great challenge. In this work, we successfully synthesised a 1D Cu-based metal-organic framework [Cu(PyDC)(H2 O)], which crystallizes in an orthorhombic system with the Pccn space group, by the hydrothermal method. Among the different catalysts utilized, the heterostructures of cathodized Cu-Cu2 O@CC demonstrate increased efficiency in producing CH3 OH and C2 H4 , achieving maximum FE values of 37...
May 17, 2024: Nanoscale
https://read.qxmd.com/read/38752569/the-biological-response-of-ph-switch-based-gold-nanoparticle-composite-polyamino-acid-embolic-material
#47
JOURNAL ARTICLE
Feng Yang, Shiwen Gong, Die Hu, Lihua Chen, Wenyuan Wang, Bo Cheng, Jing Yang, Binbin Li, Xinyu Wang
With continuous advances in medical technology, non-invasive embolization has emerged as a minimally invasive treatment, offering new possibilities in cancer therapy. Fluorescent labeling can achieve visualization of therapeutic agents in vivo , providing technical support for precise treatment. This paper introduces a novel in situ non-invasive embolization composite material, Au NPs@( m PEG-PLGTs), created through the electrostatic combination of L-cysteine-modified gold nanoparticles (Au NPs) and methoxy polyethylene glycol amine-poly[(L-glutamic acid)-(L-tyrosine)] ( m PEG-PLGTs)...
May 16, 2024: Nanoscale
https://read.qxmd.com/read/38747099/benchmarking-break-junction-techniques-electric-and-thermoelectric-characterization-of-naphthalenophanes
#48
JOURNAL ARTICLE
Juan Hurtado-Gallego, Sebastiaan van der Poel, Matthias Blaschke, Almudena Gallego, Chunwei Hsu, Rubén López-Nebreda, Marcel Mayor, Fabian Pauly, Nicolás Agraït, Herre S J van der Zant
Break-junction techniques provide the possibility to study electric and thermoelectric properties of single-molecule junctions in great detail. These techniques rely on the same principle of controllably breaking metallic contacts in order to create single-molecule junctions, whilst keeping track of the junction's conductance. Here, we compare results from mechanically controllable break junction (MCBJ) and scanning tunneling microscope (STM) methods, while characterizing conductance properties of the same novel mechanosensitive para - and meta -connected naphtalenophane compounds...
May 15, 2024: Nanoscale
https://read.qxmd.com/read/38745454/fe-doped-cu-based-bimetallic-metal-organic-frameworks-as-nanoscale-microwave-sensitizers-for-enhancing-microwave-thermal-and-dynamic-therapy-for-hepatocellular-carcinoma
#49
JOURNAL ARTICLE
Xi Luo, Han-Yao Sun, Shang-Yu Lu, Yan Zhou, Zi-Qing Xu, Nan Zhong, Yi-Shi Lu, Shou-Ju Wang, Hai-Bin Shi, Wei Tian
Microwave ablation (MWA) is recognized as a novel treatment modality that can kill tumor cells by heating the ions and polar molecules in these cells through high-speed rotation and friction. However, the size and location of the tumor affect the effective ablation range of microwave hyperthermia, resulting in residual tumor tissue and a high recurrence rate. Due to their tunable porous structure and high specific surface area, metal-organic frameworks (MOFs) can serve as microwave sensitizers, promoting microwave energy conversion owing to ion collisions in the porous structure of the MOFs...
May 15, 2024: Nanoscale
https://read.qxmd.com/read/38742531/blue-znsete-quantum-dot-light-emitting-diodes-with-low-efficiency-roll-off-enabled-by-an-in-situ-hybridization-of-znmgo-nanoparticles-and-amino-alcohol-molecules
#50
JOURNAL ARTICLE
Shaolin Ma, Fan Cao, Guohua Jia, Qianqian Wu, Sheng Wang, Xuyong Yang
ZnSeTe quantum dots (QDs) have been employed as promising emitters for blue QD-based light-emitting diodes (QLEDs) due to their unique optoelectronic properties and environmental friendliness. However, such QLEDs usually suffer from serious efficiency roll-off primarily stemming from exciton loss at the interface of the QD layer and the ZnMgO (ZMO) electron transport layer (ETL), which remarkably hinders their application in flat-panel displays. Herein, we propose an in situ hybridization strategy that involves the pre-introduction of amino alcohols into the reaction solution...
May 14, 2024: Nanoscale
https://read.qxmd.com/read/38742446/nir-and-magnetism-dual-response-multi-core-magnetic-vortex-nanoflowers-for-boosting-magneto-photothermal-cancer-therapy
#51
JOURNAL ARTICLE
Kaiming Shen, Lixian Li, Funan Tan, Calvin Ching Lan Ang, Tianli Jin, Zongguo Xue, Shuo Wu, Mun Yin Chee, Yunfei Yan, Wen Siang Lew
Due to the relatively low efficiency of magnetic hyperthermia and photothermal conversion, it is rather challenging for magneto-photothermal nanoagents to be used as an effective treatment during tumor hyperthermal therapy. The advancement of magnetic nanoparticles exhibiting a vortex-domain structure holds great promise as a viable strategy to enhance the application performance of conventional magnetic nanoparticles while retaining their inherent biocompatibility. Here, we report the development of Mn0.5 Zn0...
May 14, 2024: Nanoscale
https://read.qxmd.com/read/38742431/insulin-amyloid-fibril-formation-reduction-by-tripeptide-stereoisomers
#52
JOURNAL ARTICLE
Beatrice Rosetti, Slavko Kralj, Erica Scarel, Simone Adorinni, Barbara Rossi, Attilio V Vargiu, Ana M Garcia, Silvia Marchesan
Insulin fibrillation is a problem for diabetic patients that can occur during storage and transport, as well as at the subcutaneous injection site, with loss of bioactivity, inflammation, and various adverse effects. Tripeptides are ideal additives to stabilise insulin formulations, thanks to their low cost of production and inherent cytocompatibility. In this work, we analysed the ability of eight tripeptide stereoisomers to inhibit the fibrillation of human insulin in vitro . The sequences contain proline as β-breaker and Phe-Phe as binding motif for the amyloid-prone aromatic triplet found in insulin...
May 14, 2024: Nanoscale
https://read.qxmd.com/read/38742415/actuation-mechanism-of-a-nanoscale-drilling-rig-based-on-nested-carbon-nanotubes
#53
JOURNAL ARTICLE
Wei Si, Haonan Chen, Xiaojing Lin, Gensheng Wu, Jiajia Zhao, Jingjie Sha
With the increasing emphasis on health and the continuous improvement of medical standards, more and more micro/nano devices are being used in the medical field. However, the existing micro/nano devices cannot effectively solve various problems encountered in medical processes and achieve specific therapeutic effects. Based on this, this article designs a new type of nanoscale drilling rig. The nanoscale drilling rig is composed of double-layer nested carbon nanotubes with multiple electrodes, and is powered by an external power source, making it easy to perform long-term surgery in the human body...
May 14, 2024: Nanoscale
https://read.qxmd.com/read/38742389/correction-%C3%AE-fe-2-o-3-tio-2-3d-hierarchical-nanostructures-for-enhanced-photoelectrochemical-water-splitting
#54
Hyungkyu Han, Francesca Riboni, Frantisek Karlicky, Stepan Kment, Anandarup Goswami, Pitchaimuthu Sudhagar, Jeongeun Yoo, Lei Wang, Ondrej Tomanec, Martin Petr, Ondrej Haderka, Chiaki Terashima, Akira Fujishima, Patrik Schmuki, Radek Zboril
Correction for 'α-Fe2 O3 /TiO2 3D hierarchical nanostructures for enhanced photoelectrochemical water splitting' by Hyungkyu Han et al. , Nanoscale , 2017, 9 , 134-142, https://doi.org/10.1039/C6NR06908H.
May 14, 2024: Nanoscale
https://read.qxmd.com/read/38741471/reducing-and-tuning-the-work-function-of-field-emission-nanocomposite-cnt-nio-cathodes-by-modifying-the-chemical-composition-of-the-oxide
#55
JOURNAL ARTICLE
Maksim A Chumak, Eugeni O Popov, Sergei V Filippov, Anatoly G Kolosko, Demid A Kirilenko, Nikolay A Bert, Evgeniy V Zhizhin, Alexandra V Koroleva, Ilya S Yezhov, Maxim Yu Maximov
This work presents for the first time the possibility of reducing and tuning the work function of field emission cathodes coated with metal oxides by changing the chemical composition of oxide coatings using an example of heat-treated CNT/NiO nanocomposite structures. These cathodes are formulated using carbon nanotube (CNT) arrays that are coated with ultrathin layers of nickel oxide (CNT/NiO) by atomic layer deposition (ALD). It was found that NiO at thicknesses of several nanometers grown on CNTs heat treated at a temperature of 350 °C can change its stoichiometric composition towards the formation of oxygen vacancies, since the Ni3+ /Ni2+ peak area ratio increases and the position of the Ni-O peak binding energies shifts as observed using X-ray photoelectron spectroscopy (XPS)...
May 14, 2024: Nanoscale
https://read.qxmd.com/read/38739078/light-concentration-and-electron-transfer-in-plasmonic-photonic-ag-au-modified-mo-bivo-4-inverse-opal-photoelectrocatalysts
#56
JOURNAL ARTICLE
Martha Pylarinou, Elias Sakellis, Polychronis Tsipas, Spiros Gardelis, Vassilis Psycharis, Athanasios Dimoulas, Thomas Stergiopoulos, Vlassis Likodimos
Plasmonic photocatalysis based on metal-semiconductor heterojunctions is considered a key strategy to evade the inherent limitations of poor light harvesting and charge separation of semiconductor photocatalysts. It can be profitably combined with three-dimensional photonic crystals (PCs) that offer an ideal scaffold for loading plasmonic nanoparticles and a unique architecture to intensify photon capture. In this work, Mo-doped BiVO4 inverse opals were applied as visible light-responsive photonic hosts of Ag and/or Au plasmonic nanoparticles in order to exploit the synergy of plasmonic and photonic amplification effects with interfacial charge transfer for the photoelectrocatalytic degradation of recalcitrant pharmaceutical contaminants under visible light...
May 13, 2024: Nanoscale
https://read.qxmd.com/read/38739021/high-solid-state-photoluminescence-quantum-yield-of-carbon-dot-derived-molecular-fluorophores-for-light-emitting-devices
#57
JOURNAL ARTICLE
Nasir Javed, Haydee Pacheco, Sneha Sreekumar, Jinyu Chong, Zhongkai Cheng, Deirdre M O'Carroll
Several recent studies of carbon dots (CDs) synthesized by bottom-up methods under mild conditions have reported the presence of organic molecular fluorophores in CD dispersions. These fluorophores have a tendency to aggregate, and their properties strongly depend on whether they are present in the form of discrete molecules or aggregates. The aggregation becomes more prominent in the solid state, which motivates the study of the properties of the fluorophores associated with CDs in the solid state. Here, we report the solid-state characterization of N 4 , N 11 -dimethyldibenzo[ a , h ]phenazine-4,11-diamine (BPD) - a molecular fluorophore that forms CDs...
May 13, 2024: Nanoscale
https://read.qxmd.com/read/38739019/recent-advances-in-batch-production-of-transfer-free-graphene
#58
REVIEW
Ye Fang, Kaixuan Zhou, Wenze Wei, Jincan Zhang, Jingyu Sun
Large-area transfer-free graphene films prepared via chemical vapor deposition have proved appealing for various applications, with exciting examples in electronics, photonics, and optoelectronics. To achieve their commercialisation, batch production is a prerequisite. Nevertheless, the prevailing scalable synthesis strategies that have been reported are still obstructed by production inefficiencies and non-uniformity. There has also been a lack of reviews in this realm. We present herein a comprehensive and timely summary of recent advances in the batch production of transfer-free graphene...
May 13, 2024: Nanoscale
https://read.qxmd.com/read/38739015/orientation-and-stretching-of-supracolloidal-chains-of-diblock-copolymer-micelles-by-spin-coating-process
#59
JOURNAL ARTICLE
Jaemin Kim, Kyunghyeon Lee, Sangyoon Kim, Byeong-Hyeok Sohn
Supracolloidal chains consisting of nano- or micro-scale particles exhibit anisotropic properties not observed in individual particles. The orientation of the chains is necessary to manifest such characteristics on a macroscopic scale. In this study, we demonstrate the orientation of supracolloidal chains composed of nano-scale micelles of a diblock copolymer through spin-coating. We observed separate chains coated on a substrate with electron microscopy, and analyzed the orientation and stretching of the chains quantitatively with image analysis software...
May 13, 2024: Nanoscale
https://read.qxmd.com/read/38739006/engineered-nanomicelles-targeting-proliferation-and-angiogenesis-inhibit-tumour-progression-by-impairing-the-synthesis-of-ceramide-1-phosphate
#60
JOURNAL ARTICLE
Poonam Yadav, Kajal Rana, Ruchira Chakraborty, Ali Khan, Devashish Mehta, Dolly Jain, Bharti Aggarwal, Somesh K Jha, Ujjaini Dasgupta, Avinash Bajaj
Tumour cells secrete various proangiogenic factors like VEGF, PDGF, and EGF that result in the formation of highly vascularized tumours with an immunosuppressive tumour microenvironment. As tumour growth and metastasis are highly dependent on angiogenesis, targeting tumour vasculature along with rapidly dividing tumour cells is a potential approach for cancer treatment. Here, we specifically engineered sub-100 sized nanomicelles (DTX-CA4 NMs) targeting proliferation and angiogenesis using an esterase-sensitive phosphocholine-tethered docetaxel conjugate of lithocholic acid (LCA) (PC-LCA-DTX) and a poly(ethylene glycol) (PEG) derivative of an LCA-combretastatin A4 conjugate (PEG-LCA-CA4)...
May 13, 2024: Nanoscale
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