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Ultrasmall α-MnO with Low Aspect Ratio: Applications to Electrochemical Multivalent-Ion Intercalation Hosts and Aerobic Oxidation Catalysts.
Small
January 2025
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai, 980-8577, Japan.
Hollandite-type α-MnO exhibits exceptional promise in current industrial applications and in advancing next-generation green energy technologies, such as multivalent (Mg, Ca, and Zn) ion battery cathodes and aerobic oxidation catalysts. Considering the slow diffusion of multivalent cations within α-MnO tunnels and the catalytic activity at edge surfaces, ultrasmall α-MnO particles with a lower aspect ratio are expected to unlock the full potential. In this study, ultrasmall α-MnO (<10 nm) with a low aspect ratio (c/a ≈ 2) is synthesized using a newly developed alcohol solution process.
View Article and Find Full Text PDFRenal Clearable Chiral Manganese Oxide Supraparticles for In Vivo Detection of Metalloproteinase-9 in Early Cancer Diagnosis.
Adv Mater
December 2024
State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.
In this study, polypeptide TGGGPLGVARGKGGC-induced chiral manganese dioxide supraparticles (MnO SPs) are prepared for sensitive quantification of matrix metalloproteinase-9 (MMP-9) in vitro and in vivo. The results show that L-type manganese dioxide supraparticles (L-MnO SPs) exhibited twice the affinity for the cancer cell membrane receptor CD47 (cluster of differentiation, integrin-associated protein) than D-type manganese dioxide supraparticles (D-MnO SPs) to accumulate at the tumor site after surface modification of the internalizing arginine-glycine-aspartic acid (iRGD) ligand, specifically reacting with the MMP-9, disassembling into ultrasmall nanoparticles (NPs), and efficiently underwent renal clearance. Furthermore, L-MnO facilitates the quantification of MMP-9 in mouse tumor xenografts, as demonstrated by circular dichroism (CD) and magnetic resonance imaging (MRI) within 2 h.
View Article and Find Full Text PDFX and Q-band EMR study of ultrasmall ZnMnFeO spinel nanoparticles fabricated under nonhydrolytic conditions.
Dalton Trans
December 2024
Department of Biotechnology, Institute of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, Rzeszow PL35-310, Poland.
In this work, we are showing the results of the X- and Q-band electron magnetic resonance measurements of ultra-small ZnMnFeO nanoparticles ( 8 nm) with a very narrow size distribution. The chosen synthetic route allows for precise structural modifications with a broad concentration range ( = 0, 0.2, 0.
View Article and Find Full Text PDFIron Knights with Nanosword Induced Ferroptosis in the Battle Against Oral Carcinoma.
Nano Lett
January 2025
Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Jilin University, Changchun 130021, China.
Article Synopsis
- Oral squamous cell carcinoma (OSCC) is particularly sensitive to ferroptosis, but traditional inducers have limitations.
- This study created ultrasmall AuMn nanoclusters (AMNCs) wrapped in NK cell-derived exosomes (Exo-AMNCs) to enhance targeted treatment for OSCC.
- The AMNCs produce reactive oxygen species to induce ferroptosis while being more biocompatible, and when combined with exosomes, they show effective imaging and therapeutic potential by regulating specific proteins involved in the disease.
Use of UMFNPs/Ce6@MBs in multimodal imaging-guided sono-photodynamic combination therapy for hepatocellular carcinoma.
Biomater Sci
December 2024
Shenzhen Key Laboratory for Drug Addiction and Medication Safety, Department of Ultrasound, Institute of Ultrasonic Medicine, Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen 518036, Guangdong, P. R. China.
Early diagnosis of liver cancer and appropriate treatment options are critical for obtaining a good prognosis. However, due to technical limitations, it is difficult to make an early and accurate diagnosis of liver cancer, and the traditional imaging model is relatively simple. Therefore, we synthesized multifunctional diagnostic/therapeutic nanoparticles, UMFNPs/Ce6@MBs, loaded with ultra-small manganese ferrite nanoparticles (UMFNPs) and chlorin e6 (Ce6).
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