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Microbe-mediated synthesis of defect-rich CeO nanoparticles with oxidase-like activity for colorimetric detection of L-penicillamine and glutathione.
Nanoscale
January 2025
College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P.R. China.
To enhance production efficiency, curtail costs, and minimize environmental impact, developing simple and sustainable nanozyme synthesis methods has been the focus of relevant research. In this report, graphite-coated CeO nanoparticles (CeO NPs) with multiple defects (Ce defects, oxygen vacancies and carbon defects) were synthesized the culture filtrate of the extremely radioresistant bacterium R12 ( R12). The as-prepared CeO NPs exhibit remarkable oxidase (OXD)-like activity, efficiently catalyzing the oxidation of the chromogenic substrate 3,3',5,5'-tetramethylbenzidine (TMB) to form oxTMB, even in the absence of HO.
View Article and Find Full Text PDFNitric Oxide-Releasing Nanoscale Metal-Organic Layer Overcomes Hypoxia and Reactive Oxygen Species Diffusion Barriers to Enhance Cancer Radiotherapy.
Adv Sci (Weinh)
January 2025
Department of Chemistry, The University of Chicago, Chicago, IL, 60637, USA.
Hafnium (Hf)-based nanoscale metal-organic layers (MOLs) enhance radiotherapeutic effects of tissue-penetrating X-rays via a unique radiotherapy-radiodynamic therapy (RT-RDT) process through efficient generation of hydroxy radical (RT) and singlet oxygen (RDT). However, their radiotherapeutic efficacy is limited by hypoxia in deep-seated tumors and short half-lives of reactive oxygen species (ROS). Herein the conjugation of a nitric oxide (NO) donor, S-nitroso-N-acetyl-DL-penicillamine (SNAP), to the Hf secondary building units (SBUs) of Hf-5,5'-di-p-benzoatoporphyrin MOL is reported to afford SNAP/MOL for enhanced cancer radiotherapy.
View Article and Find Full Text PDFUnraveling the Growth Mechanism of Chiral Inorganic Nanocrystals via High-Resolution Electron Microscopy.
J Am Chem Soc
December 2024
School of Physical Science and Technology & Shanghai Key Laboratory of High-Resolution Electron Microscopy, ShanghaiTech University, Shanghai 201210, China.
Chiral inorganic nanomaterials have attracted broad interest due to their intriguing chirality-dependent performances. However, there is a lack of experimental studies and atomic-level evidence on their growth mechanism. Herein, high-crystalline chiral tellurium nanowires were synthesized in an alkali solution by using tellurium oxide as an inorganic source and hydrazine hydrate as a reductant.
View Article and Find Full Text PDFMulti-metal MOF-on-MOF metal-organic gel-based visual sensing platform for ultrasensitive detection of chlortetracycline and D-penicillamine.
Biosens Bioelectron
March 2025
Xiangya School of Public Health, Central South University, Changsha, Hunan, 410078, PR China; Hunan Provincial Key Laboratory of Clinical Epidemiology, Changsha, Hunan, 410078, PR China. Electronic address:
The widespread presence of antibiotic residues in the environment and food represents a significant threat to human health. In this study, a novel MOF-on-MOF (FCZE) gel with excellent peroxidase activity and strong fluorescence properties successfully synthesized by using Polyvinyl pyrrolidone (PVP) as a cross-linker and H₄BTEC as a ligand. Based on the energy transfer from the FCZE ligand to Eu luminescence, an ultrasensitive fluorescence method was developed for the detection of chlortetracycline (CTC), achieving a limit of detection (LOD) as low as 0.
View Article and Find Full Text PDFPEGylation of indium phosphide quantum dots prevents quantum dot mediated platelet activation.
J Mater Chem B
January 2025
Biomedical Institute for Multimorbidity, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK.
Article Synopsis
- Quantum dots (QDs) are small semiconductor particles that could improve biomedical imaging and drug delivery, with Indium phosphide QDs covered by zinc sulphide being a more biocompatible option.
- This study reveals that PEGylating these QDs significantly reduces platelet activation and aggregation, which is important to prevent excessive blood clotting.
- By decreasing the interaction between QDs and platelets, PEGylation enhances the safety and effectiveness of QDs for use in medical applications.
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