Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Lin Chen,Huan Zhang,Jing Zheng,Shiping Yu,Jinglei Du,Yongzhen Yang,Xuguang Liu
A multifunctional nanoplatform based on thermo-sensitively and magnetically ordered mesoporous carbon nanospheres (TMOMCNs) is developed for effective targeted controlled release of doxorubicin hydrochloride (DOX) and hyperthermia in this work. The morphology, specific surface area, porosity, thermo-stability, thermo-sensitivity, as well as magnetism properties of TMOMCNs were verified by high resolution transmission electron microscopy, field emission scanning electron microscopy, thermo-gravimetric analysis, X-ray diffraction, Brunauer–Emmeltt–Teller surface area analysis, dynamic light scattering and vibrating sample magnetometry measurement. The results indicate that TMOMCNs have an average diameter of ~ 146 nm with a lower critical solution temperature at around 39.5 °C. They are superparamagnetic with a magnetization of 10.15 emu/g at 20 kOe. They generate heat when inductive magnetic field is applied to them and have a normalized specific absorption rate of 30.23 W/g at 230 kHz and 290 Oe, showing good potential for hyperthermia. The DOX loading and release results illustrate that the loading capacity is 135.10 mg/g and release performance could be regulated by changing pH and temperature. The good targeting, DOX loading and release and hyperthermia properties of TMOMCNs offer new probabilities for high effectiveness and low toxicity of cancer chemotherapy.
研究领域:
材料科学
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生物医学工程
·
肿瘤学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2016
·
IF 2.101
Yichao Lv,Songping Wu,Rui Xu
The HoMn 2 O 5 nanorods were synthesized by a surfactant-assisted hydrothermal process. The length of nanorods is readily controllable with basically constant diameter. HoMn 2 O 5 nanorods show recognizable divagation at T N (Ho) of 13 K between FC and ZFC curve due to the contribution of the magnetic ordering of holmium . Size-dependent magnetic properties (i.e. a critical length for magnetization) of HoMn 2 O 5 nanorods can be ascribed to the competition between surface strain and uncompensated spin at the surface.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2020
·
IF 1.41
Huang-Fei Qin,You Li,Xing-Mei Qin,Hai-Ye Li,He-Dong Bian,Qing Yu,Fu-Ping Huang
A new complex formulated as [Mn(H2O)6][Mn2(ett)6]·0.5H2O (1) has been synthesized from 5-(ethylthio)-1H-tetrazole) (Hett) andMn(OAc)2·4H2O. The crystal structure is composed of one [Mn(H2O)6] 2+ cation and an [Mn2(ett)6] 2– anionic chain. Two Mn(II) ions are bridged by μ2-ett – ligands to give [Mn2(ett)6] 2– anionic chains, which is balanced by cationic part of [Mn(H2O)6] 2+ in charge. The hydrogen bonds between anionic/cationic units play an important role in the formation of three-dimensional (3-D) supramolecular structure of 1. Magnetic measurements of 1 exhibit an interesting spin canting behavior and long-range magnetic ordering.
研究领域:
材料科学
·
磁性材料
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·2108
·
IF 3.2
Yangzhou Wang,Qianshuo Wang,Yanhao Dong,Jin Wang,Shu Chen,Zihan Wang,Fei Chen,Guixin Cao,Wei Ren,Jie Li,Wen Wan
Multiband and nodal-like superconductivity (SC) with s- + d-wave pairing symmetry have implied that tetragonal iron sulphide (FeS) is a distinctive testbed for exploring unexpected electronic correlations. In particular, the low-moment disordered static magnetism originating from the Fe moment leads to the possibility of the coexistence of magnetic orders (MOs) in the superconducting ground state via the tuning of electronic configurations. Here, guided by density functional theory (DFT) calculations, we found that slightly substitutionally doped chromium (Cr) atoms in tetragonal FeS single crystals can induce both considerable d-orbital reconstruction around the Fermi surface and a local magnetic moment of 2.4µBat each doping site, which could highly modulate the SC ground states of the host. On this basis, a clear magnetic transition and reduced anisotropy of SC were experimentally observed. In particular, SC can survive with a doping content below 0.05. This coexistence of SC and MOs suggests strong spin correlations between Cr dopants and the host through exchange coupling. Further, an electronic temperature-related phase diagram of FeS with Cr doping contents from 0 to 0.07 is also provided. These results demonstrate that the continuous injection of local moments can be a controllable method to use to tune collective orders in unconventional iron-based superconductors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Wanwan Zhang,Zhangzhen He,Yaxin Xie,Meiyan Cui,Suyun Zhang,Sihuai Chen,Zhiying Zhao,Mengsi Zhang,Xiaoying Huang
Three new molybdate–tellurites, K2M9(TeO3)4(MoO4)4(OH)4 (M = NiII and CoII) and (NH4)2Cu9II(TeO3)4(MoO4)4(OH)4, have been successfully synthesized by conventional hydrothermal method. Due to the influence of the Jahn–Teller effect, these compounds crystallize in different space groups of rhombohedral R3̅m, monoclinic P21/c and triclinic P1̅ for Ni-, Co-, and Cu-analogues, respectively. The topological arrangements of magnetic ions in these compounds show that deficient capped-kagomé spin–lattices with kagomé positions exhibit different 1/6 depletion. Magnetic and specific heat measurements confirm that K2Ni9(TeO3)4(MoO4)4(OH)4 exhibits a spin-glass behavior at low temperature, while (NH4)2Cu9(TeO3)4(MoO4)4(OH)4 possesses a long-range canted antiferromagnetic ordering with TN ∼ 10.8 K and further shows a 3/5 magnetization plateau in the magnetization curve at low temperature.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiwei Yao,Weijun Ren,Qing Guo,Ziqi Guan,Dongliang Zhao,Jun He,Bing Li
The development of ultra-low-temperature magnetocaloric materials (MCMs) is crucial for advanced cryogenic refrigeration technologies. Rare-earth fluorides exhibit promising magnetocaloric properties, but the high magnetic ordering temperatures ( T 0 ) limit their performance below 2 K. Single-phase KLnF 4 (Ln = Tb, Dy, Ho, Er, Tm) compounds with a trigonal structure were successfully synthesized by introducing the diamagnetic K⁺ ions into LnF 3 via solid-state sintering. Structural analysis confirms that the K⁺ incorporation increases the distance between Ln 3+ ions, suppressing dipolar interactions and reducing T 0 to below 2 K. Notably, KHoF 4 exhibits a 16.5 % higher magnetic entropy change (-∆ S M ) than HoF 3 , attributed to the lower magnetic anisotropy of the trigonal KHoF 4 with higher symmetry. The effects of these two aspects overcome the negative impact caused by the decrease of the magnetic ion concentration. These findings demonstrate that K⁺ incorporation is a dual-functional strategy for simultaneously modulating transition temperatures and magnetocaloric performance of rare-earth fluorides. This work provides a scalable approach to designing ultra-low-temperature MCMs with various refrigeration windows.
研究领域:
材料科学
·
凝聚态物理
·
低温工程
·
磁性材料
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Ningxia Li,Qi Luo,Meiyan Cui,Zhiying Zhao,Zhangzhen He
New fluorophosphate compounds H A 5 M 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb; M = Fe, Ga) were synthesized by a fluorine-rich hydrothermal method . These compounds crystallize in the monoclinic system with a P2 1 /n space group, exhibiting an open framework structure built by [PO 3 (OH)] groups, [MO 4 (OH)F], and [MO 4 F 2 ] octahedra, where ten-membered-ring channels, eight-membered-ring channels, six-membered-ring channels, and the linear M 3+ trimers are seen. The characterizations were carried out by powder XRD , EDS , FT-IR spectra, and magnetic measurements. The results confirmed that H A 5 Fe 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb) show a quite similar magnetic behavior, possessing an antiferromagnetic ordering at 14.7 K and 15.6 K, respectively. The changes of the magnetic entropy for such antiferromagnetic orderings can be estimated as ∼10.7 J mol −1 K −1 and ∼13.4 J mol −1 K −1 .
研究领域:
无机化学
·
材料科学
·
固体化学
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Alimujiang Yalikun,Yanhong Wang,Nian Shi,Yiwen Chen,Hao Huang,Hyun-Joo Koo,Zhongwen Ouyang,Zhengcai Xia,Reinhard K. Kremer,Myung-Hwan Whangbo,Hongcheng Lu
We prepared a new polar layered quantum magnet Ba2Cu3(SeO3)4F2, by a combined use of F– and pyramidal SeO32– anions, determined its crystal structure by X-ray diffraction, and characterized its magnetic properties by magnetization, electron spin resonance (ESR) and specific heat measurements, and by density functional theory calculations. The title compound has first experimentally reported bitriangular chains of Cu2+ ions aligned along the b direction to form layers parallel to the ab plane, and these layers are separated by Ba2+ ions. The magnetic susceptibility data reveal that, despite strong predominant antiferromagnetic intrachain interactions indicated by the large negative Weiss temperature θ of −143.9 K within bitriangular chains, no long-range order occurs down to 2 K. The latter, further confirmed by the specific heat measurements, is attributed to the extremely weak interlayer interaction. The spins in each bitriangular chain become ferrimagnetically ordered to exhibit a 1/3-magnetization plateau, which persists at least up to 30 T. This reveals that each bitriangular chain acts as an S = 1/2 entity at low temperatures, as observed from the decrease of the effective magnetic moment Peff from 3.67 μB in the high temperature range to 1.89 μB in the low temperature range, equivalently, from three free Cu2+ ions to only one effective Cu2+ ion per formula unit. In each layer of Ba2Cu3(SeO3)4F2, the interaction between adjacent ferrimagnetic chains is ferromagnetic rather than antiferromagnetic, contrary to the observations in other reported cases.
研究领域:
凝聚态物理
·
量子磁性
·
晶体学
·
材料科学
·
固体物理
✓ 已验证
DOI
高影响因子
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