INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Qingwang Bai,Mingxiang Xu
Being the first intrinsic antiferromagnetic (AFM) topological insulator (TI), MnBi 2 Te 4 , has garnered significant attention as an ideal platform for realizing diverse exotic topological quantum states. However, little is known about the magnetocaloric properties of MnBi 2 Te 4 to date. In this work, we report the magnetocaloric effect, rotating magnetocaloric effect, and magnetocaloric switching effect of single-crystal MnBi 2 Te 4 . Under 0–9 T, the maximum magnetic entropy changes (−ΔS M ) obtained are 2.5 J kg −1 K −1 and 2.1J kg −1 K −1 , when H∥c and H∥ab, respectively. Furthermore, the anisotropy in the −ΔS M between the two crystallographic orientations gives MnBi 2 Te 4 single crystals a rotational magnetocaloric effect. The sample exhibits a rotating entropy change of 0.4J kg −1 K −1 under a magnetic field of 9 T as the magnetic field is rotated from the ab plane to the c axis. More importantly, MnBi 2 Te 4 exhibits a coexistence of conventional and inverse magnetocaloric effects by switching between them at a specific temperature and magnetic field, that is, the magnetocaloric switching effect. Moreover, the switching temperature of MnBi 2 Te 4 can be modulated by changing the magnetic field, so that it is suitable for various constant-temperature baths. This study provides a meaningful clue for the design and exploration of high performance MCE-based constant-temperature devices.
研究领域:
凝聚态物理
·
拓扑材料
·
磁热学
·
量子材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 48
·e54722
·
IF 3
Jingxiang Wang,Min Li,Xunwei Liu,Jiangmin Yu,Dicheng Yang,Chunping Yuan,Xiaoying Yin,Yinan Yan
Magnetic hyperthermia generated by functionalized bone cement is a promising approach to treat postosteocarcinoma cancer regeneration. However, it is crucial to minimize the magnetic field intensity using localized high-caloric-generating nanoparticles to avoid the potential hazards of electromagnetic field exposure to living organisms. Herein, in situ hydrothermally synthesized CoFe 2 O 4 (CoFe) nanoparticles and boron nitride nanosheet (BNNS)–supported CoFe complexes (BNCoFe) are incorporated into polymethyl methacrylate (PMMA) cement to prepare a composite implant with high-intensity magnetic–thermal performance and safety. The results show that the CoFe nanoparticles (size = ~70 nm) anchored on BNNS surfaces exhibit a maximum magnetic–thermal ablation temperature of ~42°C within 50 s under an alternating magnetic field of 400 KHz (field frequency) and 30 Oe (field intensity) in vitro. Furthermore, the incorporation of BNNSs into the PMMA matrix notably increases the thermal conductivity of PMMA from 0.07 to 0.25 W mK −1 and improves its mechanical properties (compressive strength increases from 74.0 ± 1.6 to 81.0 ± 1.0 MPa), which is attributed to the crystalline structure of BNNSs in the PMMA matrix. Inductively coupled plasma analysis shows a considerably reduced Co 2+ ion release from PMMA/BNCoFe, indicating its potential as a safe implantation material for hyperthermia treatment.
研究领域:
生物医学工程
·
材料科学
·
肿瘤治疗
✓ 已验证
DOI
高影响因子
Frontiers in Pharmacology
·
2022
·
IF 5.988
Wang Yu,Wang Rui,Chen Lixin,Chen Lili,Zheng Yi,Xin Yuanrong,Zhou Xiqiu,Song Xiaoyun,Zheng Jinzhou
The high accumulation and poor penetration of nanocarriers in tumor is a contradiction of nanomedicine, which reduces the efficacy of chemotherapy. Due to the positive effect of hyperthermia on in vivo drug diffusion, we designed a magnetothermally sensitive micelle (MTM) by integrating magnetic targeting (MT), magnetic hyperthermia (MH), and magnetothermally responsive drug release to facilitate simultaneous drug accumulation and penetration in tumor. Accordingly, we synthesized a cyanine7-modified thermosensitive polymer with phase transition at 42.3°C, and utilized it to prepare drug-loaded MTMs by encapsulating superparamagnetic MnFe2O4 nanoparticles and doxorubicin (DOX). The obtained DOX–MTM had not only high contents of DOX (9.1%) and MnFe2O4 (38.7%), but also some advantages such as superparamagnetism, high saturation magnetization, excellent magnetocaloric effect, and magnetothermal-dependent drug release. Therefore, DOX–MTM improved in vitro DOX cytotoxicity by enhancing DOX endocytosis under the assistance of MH. Furthermore, MT and MH enhanced in vivo DOX–MTM accumulation and DOX penetration in tumor, respectively, substantially inhibiting tumor growth (84%) with excellent biosafety. These results indicate the development of an optimized drug delivery system with MH and MH-dependent drug release, introducing a feasible strategy to enhance the application of nanomedicines in tumor chemotherapy.
研究领域:
肿瘤学
·
纳米医学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 20
·1-15
·
IF 2.8
Xie Zhuojia,Jiang Xinyu,Zhang Weijian,Zou Zhengguang
With the development of the current times, the demand for refrigeration is in every aspect. Nevertheless, the necessity for new refrigeration materials is immediate because of the greenhouse effect and the destruction of the atmosphere. Therefore, perovskite materials have been investigated. La 0.8− x Eu x Ca 0.1 Sr 0.1 MnO 3 (LECSMO) ( x = 0.05, 0.10, 0.15) powder samples were prepared using the sol–gel method (S–G). The structure, magnetocaloric effect, and magnetic of LECSMO have been explored. X-ray diffraction (XRD) indicates that all samples belong to the rhombohedral perovskite structure of the Pbnm space group. The magnetic research of LECSMO revealed that the samples doped with Eu 3+ exhibited a ferromagnetic (FM) to paramagnetic (PM) transition around the Curie temperature (Tc). As the amount of Eu 3+ doping is added, Tc decreased from 264 to 194 K. Normalization and Banerjee’s criterion confirmed the second-order phase transition of the LECSMO near Tc. The maximum magnetic entropy change ( \(-\varDelta {S}_{M}^{max}\) ) for LECSMO ( x = 0.05, 0.10, 0.15) is 5.39, 4.52, and 4.35 J/(kg·K) when the applied magnetic field (H) = 5 T, respectively. Further, the relative cooling power (RCP) of LECSMO is 282.20 J·kg − 1 , 305.20 J·kg − 1 , and 323.15 J·kg − 1 , respectively.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Zheng Li,Yuling Su,Yuying Zuo,Gaoshang Gong,Yaran Duan,Minghao Wang,Maocai Wei,Yongqiang Wang
In this paper, the crystal structure, vacancies, magnetoelectric properties and magneto-thermal properties of Gd 1- x Dy x CrO 3 (0 ≤ x ≤ 0.5) samples were reported. In crystal structure analysis, after doping Dy 3+ , the lattice constant and the grain size of the sample decreases. The results of positron annihilation lifetime study indicates that the overall electron density near defect increases and that appeared as a gradual decreasing trend of τ 2 with Dy 3+ concentration. The ferromagnetism of the sample gradually decreased after doping, and the T N (Cr) of the sample decreased systematically with increasing concentration of Dy 3+ . Moreover, the introduction of Dy 3+ inhibited the magneto-electric coupling and weakened the magneto-thermal properties of the samples. This result reveals the effect of Dy 3+ doping on the structure, magnetic properties, magnetothermal and dielectric properties of GdCrO 3 .
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2016
·Vol. 62
·期 8
·2614-2621
·
IF 2.98
Luting Ling,Wei Wang,Cai-Feng Wang,Su Chen
The intrinsic low quantum yield (QY) of type II core shell quantum dots (QDs) composes the limitation for these heterostructured nanomaterials to be used in practical application. Herein, magnetic hyperthermia method is employed to intensify reaction process and facilely synthesize CdTe/CdSe heterostructured QDs with improved optical performance for the first time. The QY of the type II QDs is increased to 49% by further growing an inert ZnO layer. The type I interface between CdSe and ZnO helps confine electrons to the inner structure of the QDs, thus improving the QY. The successful preparation and performance enhancement of the CdTe/CdSe type II QDs via magnetic hyperthermia method demonstrate the great potential of this method for the preparation of other materials. Besides, the red-emission QDs are used as conversion materials in white light emitting diodes to reveal their promising application in practical illumination. © 2016 American Institute of Chemical Engineers AIChE J , 62: 2614–2621, 2016
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 27
·13363-13371
·
IF 3.553
Cao Yutao,Yuan Yue,Shang Yafen,Zverev Vladimir I.,Gimaev Radel R.,Barua R.,Hadimani R. L.,Mei Lan,Guo Gang,Fu Hao
Micro-sized particles of Fe x Rh 100− x ( x = 50, 48, 45, 40, and 35) binary alloys were synthesized by a solid-phase reduction method and their structural properties, magnetic properties and cytotoxicity have been characterized. From X-ray diffraction results, the Fe 50 Rh 50 alloy is in a single chemically ordered α ′ phase while the face-centered cubic disordered γ phase arises and increases with Rh content when x is smaller than 50. The magnetization behavior of the alloys demonstrates that the α ′ phase consists of ferromagnetic and antiferromagnetic components due to the nonuniformity of elements in the particulate alloys. The maximal magnetic entropy change and the relative refrigeration capacity of the Fe 50 Rh 50 particles reach 9.7 J/kg K and 230 J/kg, respectively, with a 0–3 T magnetic field change. Despite its moderate magnetic entropy among the first-order transition materials, Fe 50 Rh 50 microparticles are promising for biomedical applications due to its large relative cooling power and low cytotoxicity.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Quanyi Liu,Junfeng Wang,Huicai Xie,Qi Fu,XinQiang Gao,Zhenxing Li,JinLiang Zhao,Zhaojun Mo
A modified solid-phase reaction method was used to synthesize the polycrystalline Eu 3 B 2 O 6 -as a novel cryogenic magnetocaloric material. In addition, investigations into the magnetocaloric effect (MCE), magnetic properties and crystal structure of compound have been precisely completed. The results indicate that the compound undergoes a second-order magnetic-phase transition from ferromagnetic to paramagnetic at 8 K and has a hexagonal structure that belongs to the R-3c space group. Meanwhile, the MCE was evaluated by using magnetic entropy change (-Δ S M ), temperature averaged entropy change ( TEC ) as well as the refrigeration capacity ( RC ) for Eu 3 B 2 O 6 . Under the field change from 0 to 5 T, the maximal values of -Δ S M and TEC (5) are 38.6 and 35.7 J kg −1 K −1 , respectively, while the corresponding RC reaches 435.9 J kg −1 . The giant low-field MCE facilitates device miniaturization and cost reduction, making Eu 3 B 2 O 6 compound a promising candidate for cryogenic magnetic refrigeration.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
SCRIPTA MATERIALIA
·
2024
·
IF 5.3
Mengyun Jia,Dingliang Liang,Qing Du,Hui Wang,Yuan Wu,Suihe Jiang,Xiaobin Zhang,Haihui Ruan,Xiongjun Liu,Zhaoping Lu
Magnetothermal therapy (MT) is a noninvasive cancer treatment that has shown great promise in recent years. However, the low magnetothermal efficiency of the existing magnetic nanoparticles used in MT has been an obstacle to their widespread applications. In this work, we report a new class of Fe-Co-Ni-Cu high-entropy magnetic nanoparticles (HEMNPs) with exceptional magnetothermal properties synthesized by a thermal decomposition method. The fabricated HEMNPs, having an average diameter of 60–70 nm, exhibited a saturation magnetization of 42.4 emu/g and coercivity of 129.5 Oe. The hyperthermia measurement reveals that the HEMNPs have a maximum specific loss power of 202 W/g at the concentration of 2 mg/ml under an alternating magnetic field with an intensity of 46 Oe and a frequency of 266 kHz, demonstrating the great potential for MT applications. Our results demonstrate that the high-entropy concept can be extended to develop high-performance magnetic nanoparticles for MT applications.
研究领域:
材料科学
·
纳米技术
·
癌症研究
·
治疗工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhuojia Xie,Zhengguang Zou,Xinyu Jiang,Weijian Zhang
The effects of K + doping on structure, magnetic characteristics , magnetocaloric properties, and critical behavior of La 0.7-x Nd 0.1 Sr 0.2 K x Mn 0.95 Ni 0.05 O 3 (LNSKMNO) ceramics (x = 0.00, 0.05, and 0.10) were investigated. The X-ray diffraction and refinement findings revealed that LNSKMNO exhibited a distinctive rhombohedral structure of the R-3c space group (No. 167). To validate the chemical composition of LNSKMNO ceramics, EDS spectroscopy and X-ray photoelectron spectroscopy (XPS) were utilized. The magnetization of LNSKMNO exhibited a temperature-dependent behavior, revealing a phase transition from the ferromagnetic (FM) phase to the paramagnetic (PM) phase at approximately the Curie temperature (Tc). By utilizing normalization and Banerjee's criterion, the magnetic phase transition of LNSKMNO was determined to be a second order magnetic phase transition. The maximal magnetic entropy ( − Δ S M max ) of LNSKMNO around Tc was 4.24, 4.53, and 4.07 J/(kg K) at the 5 T external magnetic field (H). The Kouvel-Fisher approach and modified Arrott plot were used for determining the values of the critical exponents of β , γ , and δ . The critical exponents for LNSKMNO ceramics generally conformed to those obtained based on the Mean-field model.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Guangchao Xie,Bingjie Li,Shuyue Guo,Wenjing Hou,Yao Wang,Jiamei Liu,Jialin Zhu,Luchen Chang,Xiaoqing Wang,Xiaoyi Wang,Jinbin Pan,Xi Wei
Percutaneous local thermal therapy, containing radio frequency and microwave ablation, is widely utilized in the clinical management of hepatocellular carcinoma (HCC) due to its minimal invasiveness and favorable therapeutic outcomes. However, its further development is limited by a prolonged ablation duration and the risk of excessive heating. Magnetic hyperthermia therapy (MHT) provides a new perspective for percutaneous tumor thermal ablation due to its superior tissue penetration capability and safety. Herein, an iron foam–agarose gel–drug (IF-Aga-drug) implant is prepared using a minimalistic method for percutaneous combination therapy of HCC. The excellent conductivity of IF endows it with strong heating capability owing to eddy current loss in an alternating magnetic field (AMF), while the abundant pores provide ample space for drug loading. Agarose gel imparts the IF platform with universal and efficient drug-loading capacity and controlled drug-release capability that is responsive to magnetic hyperthermia. Doxorubicin (DOX) is utilized as a representative drug to construct the IF-Aga-DOX implant, which is successfully employed in ultrasound-guided, magnetic hyperthermia-based combination chemotherapy for orthotopic HCC in rabbits under ultralow-power magnetic field intensities (Happl·fappl = 2.25 × 108 A m–1 s–1). The developed IF-Aga-drug implant platform offers a convenient and versatile strategy for percutaneous tumor therapy.
研究领域:
医学工程
·
肿瘤学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2015
·Vol. 26
·期 42
·425101
·
IF 3.821
Jun Zhou,Jinghua Li,Xingwei Ding,Junjie Liu,Zhong Luo,Yun Liu,Qichun Ran,Kaiyong Cai
In recent years, magnetic hyperthermia nanoparticles have drawn great attention for cancer therapy because they have no limitation of tissue penetration during the therapy process. In this study, cubic nanoporous Fe2O3 nanoparticles derived from cubic Prussian blue nanoparticles were used as magnetic cores to generate heat by alternating the current magnetic field (AMF) for killing cancer cells. In addition, polypyrrole (PPy) was coated on the surfaces of the cubic Fe2O3 nanoparticles to load doxorubicin hydrochloride (DOX). The PEG component was then physically adsorbed onto the surfaces of the nanoparticles, resulting in a Fe2O3@PPy-DOX-PEG nanocomposite. The nanocomposite was triggered by acid stimulus and AMF to release DOX, resulting in a remarkable combination therapeutic effect via chemotherapy and magnetic hyperthermia. Furthermore, the nanocomposite could realize magnetic resonance imaging (MRI) due to the magnetic core structure. The study provides an alternative for the development of new nanocomposites for combination cancer therapy with MR imaging in vivo.
研究领域:
生物医学工程
·
肿瘤学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）