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Total 3421 results found since Jan 2013.

Shape Anisotropy ‐Governed High‐Performance Nanomagnetosol for In Vivo Magnetic Particle Imaging of Lungs
Magnetic particle imaging (MPI) offers high contrast, sensitivity, and signal-to-noise ratios for lung imaging, enhancing theranostic strategies in respiratory disease. Innovations in MPI tracers promise further gains, bolstering clinical applicability. This work introduces a superior nanotracer, leveraging magnetic nanoparticle shape anisotropy, elevating sensitivity and resolution beyond conventional spherical counterparts for lung MPI. AbstractCaused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), coronavirus disease 2019 (COVID-19) has shown extensive lung manifestations in vulnerable individuals, putt...
Source: Small - September 22, 2023 Category: Nanotechnology Authors: Saumya Nigam, Jeotikanta Mohapatra, Ashley V. Makela, Hanaan Hayat, Jessi Mercedes Rodriguez, Aixia Sun, Elizabeth Kenyon, Nathan A. Redman, Dana Spence, George Jabin, Bin Gu, Mohamed Ashry, Lorenzo F. Sempere, Arijit Mitra, Jinxing Li, Jia Tags: Research Article Source Type: research

Magnetic Nanoparticles: A Review on Synthesis, Characterization, Functionalization, and Biomedical Applications
This review outlines diverse magnetic nanoparticle (MNP) designs, materials, morphologies, and characterization methods. It assesses various MNP synthesis techniques, their pros and cons, and explores inorganic and organic surface coatings. Biomedical MNP applications are covered, spanning hyperthermia, MRI, drug delivery, biosensors, and magnetic particle imaging. Future MNP structure trends and novel biomedical prospects are also discussed. AbstractNowadays, magnetic nanoparticles (MNPs)  are applied in numerous fields, especially in biomedical applications. Since biofluidic samples and biological tissues are nonmagneti...
Source: Small - September 21, 2023 Category: Nanotechnology Authors: Bahareh Rezaei, Parsa Yari, Sean M. Sanders, Haotong Wang, Vinit Kumar Chugh, Shuang Liang, Shahriar Mostufa, Kanglin Xu, Jian ‐Ping Wang, Jenifer Gómez‐Pastora, Kai Wu Tags: Review Source Type: research

Superhydrophobic Nanoparticles: An Efficiently Selective Adsorbent for Surfactant ‐Like Contaminants from Complex Wastewater Matrices
Superhydrophobic polydopamine nanospheres are developed to efficiently and selectively remove surfactant-like contaminants from complex wastewater matrices. A low-field nuclear magnetic resonance (LT-NMR) is conducted to offer a quantitative surface characterization approach for powder nanoparticles and elucidate insights into the interaction mechanism. AbstractSurfactant-like contaminants (SLCs) with distinctive amphiphilic structures have become a global concern in wastewater due to their toxicity and persistency. Despite extensive efforts, achieving efficient and selective SLCs removal remains challenging because of the...
Source: Small - September 21, 2023 Category: Nanotechnology Authors: Lingyue Zhang, Chuyang Y. Tang, Chu Tang, Huijing Wang, Jianchao Wang, Ruiying Li, Haopeng Feng, Dongbei Yue Tags: Research Article Source Type: research

SMART RHESINs —Superparamagnetic Magnetite Architecture Made of Phenolic Resin Hollow Spheres Coated with Eu(III) Containing Silica Nanoparticles for Future Quantitative Magnetic Particle Imaging Applications (Small 38/2023)
Hollow NanospheresSMART RHESINs are novel iron oxide-filled hollow nanospheres coated with luminescent Eu(III) complex-containing silica nanoparticles. Unlike typical core/shell nanoparticles, SMART RHESINs retain unchanged effective Brownian and N éel relaxation even when fully immobilised in a viscous media. This unique behaviour makes SMART RHESINs potential quantitative magnetic particle imaging (MPI) probes for biological applications. More details can be found in article number2301997 by Esther S. R ösch and co-workers.
Source: Small - September 20, 2023 Category: Nanotechnology Authors: Julia Feye, Jessica Matthias, Alena Fischer, David Rudolph, Jens Treptow, Radian Popescu, Jochen Franke, Annemarie L. Exarhos, Zoe A. Boekelheide, Dagmar Gerthsen, Claus Feldmann, Peter W. Roesky, Esther S. R ösch Tags: Frontispiece Source Type: research

External Fields Assisted Highly Efficient Oxygen Evolution Reaction of Confined 1T ‐VSe2 Ferromagnetic Nanoparticles (Small 38/2023)
Confined 1T-VSe2 Ferromagnetic NanoparticlesIn article number2300122, Cailei Yuan, Shouguo Wang, and co-workers report confined 1T-VSe2 ferromagnetic nanoparticles in amorphous carbon matrix for external magnetic fields assisted highly efficient oxygen evolution reaction (OER). Benefiting from the confined structure and the high-efficient spin-related OER kinetics under external magnetic fields, the confined 1T-VSe2 ferromagnetic nanoparticles exhibit superior OER electrocatalytic activity and remarkable stability during the long-term OER operation.
Source: Small - September 20, 2023 Category: Nanotechnology Authors: Mingyue Chen, Wenda Zhou, Kun Ye, Cailei Yuan, Mengyuan Zhu, Hao Yu, Hongzhou Yang, He Huang, Yanfei Wu, Jingyan Zhang, Xinqi Zheng, Jianxin Shen, Xiao Wang, Shouguo Wang Tags: Back Cover Source Type: research

Synthesis of Iron Sulfide Nanocrystals Encapsulated in Highly Porous Carbon ‐Coated CNT Microsphere as Anode Materials for Sodium‐Ion Batteries
In this study, a concept of highly porous carbon-coated carbon nanotube (CNT) porous microspheres, which serve as excellent reservoir materials is suggested and a porous microsphere is developed by encapsulating iron sulfide nanocrystals within the highly porous carbon-coated CNTs using a sulfidation process. Furthermore, various sulfidation processes to determine the optimal method for achieving complete encapsulation are investigated by comparing the morphologies of diverse iron sulfide-carbon composites. The fully encapsulated structure, combined with the porous carbon, provides ample space to accommodate the significan...
Source: Small - September 20, 2023 Category: Nanotechnology Authors: Yeong Beom Kim, Hyo Yeong Seo, Kyeong ‐Ho Kim, Jung Sang Cho, Yun Chan Kang, Gi Dae Park Tags: Research Article Source Type: research

Ligand ‐Directed Shape Reconfiguration in Inorganic Materials
Shape-changing nanoparticles are synthesized using an asymmetrical surface functionalization method. Contrary to the prevalent view of inorganic clays as inflexible, it is found that the halloysite particles can reversibly switch their shape state upon altering ligand-driven chemistry, resulting from the unbalanced structural hindrance on the particle surface. AbstractPolymer elastomers with reversible shape-changing capability have led to significant development of artificial muscles, functional devices, and soft robots. By contrast, reversible shape transformation of inorganic nanoparticles is notoriously challenging due...
Source: Small - September 20, 2023 Category: Nanotechnology Authors: Nishat Paul, Lecheng Zhang, Shijun Lei, Dali Huang, Ling Wang, Zhengdong Cheng, Minxiang Zeng Tags: Research Article Source Type: research

Biohybrid Urchin ‐Like ZnO‐Based Microspheres with Tunable Hierarchical Structures and Enhanced Photoelectrocatalytic Properties
A novel biohybrid urchin-like magnetic ZnO microsphere with tunable hierarchical structures is produced, which integrates Fe3O4 nanoparticles layer and well-oriented 3D ZnO nanorod arrays shell with excellent controllability and stability. Compared with disordered ZnO nanoparticles and nanoflowers accumulation shell, this biohybrid structural design exhibits the best photoelectrocatalysis performances for pollutant degradation. AbstractMicroorganisms have attracted much attention to act as biotemplates for fabricating micro/nanostructured functional particles. However, it is still challenging to produce tunable hierarchica...
Source: Small - September 20, 2023 Category: Nanotechnology Authors: Hui Zhou, Jun Cai, Bo Gu, Deyuan Zhang, De Gong Tags: Research Article Source Type: research

Glucosylated Hybrid TiO2/Polymer Nanomaterials for Actively Targeted Sonodynamic Therapy of Cancer
Researchers introduce a novel anticancer sonodynamic platform, namely glucosylated hybrid ceramic/polymeric nanoparticles. These precisely size-controlled nanoparticles enhance tumor-specific delivery using a surface modification with a glucose analog. When combined with therapeutic ultrasound, these nanoparticles dramatically reduce tumor growth and prolong the survival of rhabdomyosarcoma-bearing mice. This innovative strategy shows great potential for local anticancer treatment. AbstractSonodynamic therapy (SDT) is an anti-cancer therapeutic strategy based on the generation of reactive oxygen species (ROS) upon local ul...
Source: Small - September 16, 2023 Category: Nanotechnology Authors: Ivan Zlotver, Alejandro Sosnik Tags: Research Article Source Type: research

Negatively Charged Hydrophobic Carbon Nano ‐Onion Interfacial Layer Enabling High‐Rate and Ultralong‐Life Zn‐Based Energy Storage
A negatively charged hydrophobic carbon nano-onion (CNO) interfacial layer to realize ultrastable and high-rate Zn anodes is reported, enabling high-performance Zn-based electrochemical energy storage. Its hydrophobicity blocks active water and reduces the Zn2+ desolvation barrier, and the negatively charged CNOs adsorb Zn2+ and repel SO42 − to homogenize Zn2+ flux, accelerate Zn2+ desolvation and suppress the self-corrosion of Zn anodes. AbstractZn-based electrochemical energy storage (EES) systems are attracting more attention, whereas their large-scale application is restricted by the dendrite and parasitic reaction-c...
Source: Small - September 16, 2023 Category: Nanotechnology Authors: Xinya Peng, Yang Li, Fulian Kang, Xu Li, Zhiyuan Zheng, Liubing Dong Tags: Research Article Source Type: research

Carbon Dots: From Synthesis to Unraveling the Fluorescence Mechanism
Emerging carbon-based nanoparticles (e.g., carbon dots) have been proven to be promising materials for biological application. This review focuses on current understanding of fluorescence mechanisms, and also summarizes recent advances in synthesis and functionalization of carbon dots. An in-depth analysis of synthetic precursors, surfaces, defects, and energy states is presented in this review. AbstractCarbon dots (CDs) being a new type of carbon-based nanomaterial have attracted intensive interest from researchers owing to their excellent biophysical properties. CDs are a class of fluorescent carbon nanomaterials that ha...
Source: Small - September 16, 2023 Category: Nanotechnology Authors: Maha Alafeef, Indrajit Srivastava, Teresa Aditya, Dipanjan Pan Tags: Review Source Type: research

Brownian Relaxation Shakes and Breaks Magnetic Iron Oxide ‐Polymer Nanocomposites to Release Cargo
Iron oxide nanoparticles larger than ≈15 nm react to alternating magnetic fields by Brownian relaxation resulting in tumbling and shaking. It is shown that this shaking motion partially detaches and cleaves polymer coatings to release cargo molecules. As opposed to typical hyperthermia applications, this release mechanism is heat-fr ee hence broadening the application space of magnetic nanoparticles. AbstractMagnetic nanoparticles (NPs) are widely employed for remote controlled molecular release applications using alternating magnetic fields (AMF). Yet, they intrinsically generate heat in the process by N éel relaxatio...
Source: Small - September 16, 2023 Category: Nanotechnology Authors: Emilia Izak ‐Nau, Louisa P. Niggemann, Robert Göstl Tags: Research Article Source Type: research

Defects Healing of the ZnO Surface by Filling with Au Atom Catalysts for Efficient Photocatalytic H2 Production
In this study, surface oxygen vacancy (Vo) defects are created on ZnO (Vo-ZnO) NPs by directly pyrolyzing zeolitic imidazolate framework. The surface defects on Vo-ZnO provide active sites for the diffusion of single Au atoms and as nucleation sites for the formation of Au NPs by the in situ photodeposition process. The electronically healed surface defects by single Au atoms help in the formation of a heterojunction between the ZnO and plasmonic Au NPs. The formed Au/Vo-Au:ZnO-4 heterojunction prolongs photoelectron lifetimes and increases donor charge density. Therefore, the optimized photocatalysts of Au/Vo-Au:ZnO-4 has...
Source: Small - September 15, 2023 Category: Nanotechnology Authors: Santosh V. Mohite, Shinik Kim, Jiyoung Bae, Hee J. Jeong, Tae Woong Kim, Jihoon Choi, Yeonho Kim Tags: Research Article Source Type: research

Mitigation of Anti ‐Drug Antibody Production for Augmenting Anticancer Efficacy of Therapeutic Protein via Co‐Injection of Nano‐Rapamycin
Co-injection of the PEGylated rapamycin nanoparticles and a protein toxin (trichosanthin) can mitigate the formation of anti-drug antibody via inducing durable antigen-specific tolerance. The combination of trichosanthin and the rapamycin nanoparticles yields an enhanced effect to inhibit the growth of breast tumor. AbstractThe induction of anti-drug antibody (ADA) is a formidable challenge for protein-based therapy. Trichosanthin (TCS) as a class of ribosome-inactivating proteins is widely studied in tumor treatment. However, the immunogenicity can induce the formation of ADA, which can cause hypersensitivity reactions an...
Source: Small - September 14, 2023 Category: Nanotechnology Authors: Ya Chang, Wei Xiong, Chenming Zou, Ping Zeng, Jiazhen Hou, Bahtiyor Muhitdinov, Yuanyuan Shen, Yongzhuo Huang, Shengrong Guo Tags: Research Article Source Type: research

Multifunctional Carbon Dots for Biomedical Applications: Diagnosis, Therapy, and Theranostic
Carbon dots (CDs) possess various properties and are a rich treasure trove for new discoveries. Through refined synthesizing strategies, CDs stand a chance to guide significant development in biomedical applications. Various biomedical applications are elaborated from three aspects: diagnosis, therapy, and theranostic. Challenges and future directions of CDs are also presented. AbstractDesigning suitable nanomaterials is an ideal strategy to enable early diagnosis and effective treatment of diseases. Carbon dots (CDs) are luminescent carbonaceous nanoparticles that have attracted considerable attention. Through facile synt...
Source: Small - September 13, 2023 Category: Nanotechnology Authors: Jiayi Wang, Yu Fu, Zhanghao Gu, Hao Pan, Panyu Zhou, Qi Gan, Yuan Yuan, Changsheng Liu Tags: Review Source Type: research