RSC Advances
·
2016
·Vol. 6
·期 23
·19430-19436
·
IF 3.289
Jin Shen,Chunlei Wang,Shuhong Xu,Yiping Cui
Room temperature ferromagnetism is the precondition of the application of diluted magnetic semiconductors. At present, diluted magnetic nanocrystals (NCs) with room temperature ferromagnetism usually contain toxic elements, such as Cd. In this work, we report nontoxic Co:CuInS2 diluted magnetic NCs, which exhibit room temperature ferromagnetism. After growth of a ZnS shell outside Co:CuInS2 NCs, bright fluorescence can be observed, making as-prepared Co:CuInS2@ZnS NCs with both fluorescence and room temperature ferromagnetism. Besides ZnS shell encapsulation, the preparation of fluorescent–ferromagnetic bi-functional Co:CuInS2@ZnS NCs also relates to the doping amount of Co. Excess Co dopant would quench the fluorescence of the NCs whereas insufficient Co dopant could not offset the diamagnetism of the CuInS2@ZnS NCs. Only under appropriate Co doping do Co:CuInS2@ZnS NCs have both fluorescence and room temperature ferromagnetism.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Yingying Yang,Jingyu Xu,Jinghui Zhou,Xing Wang
Lignin is a renewable raw material with excellent adsorption, biodegradability , and non-toxicity. As a new, green nanomaterial, lignin nanoparticles (LNPs) have been explored as high-value renewable materials for applications in many fields. Herein, we provide a simple, rapid approach for the fabrication of size-controlled LNPs using a titrimetric nanoprecipitation method. The prepared LNPs were formed through a layer-by-layer self-assembly approach from inside to outside based on π-π interactions and had spherical shapes with porous surfaces and particle sizes from 272.0 to 915.4 nm. The average particle size of LNPs varied with stirring speed and decreased as the volume of deionized water increased. Compared with those of the original lignin, the chemical structural characteristics of LNPs did not change significantly. The proposed scheme for the preparation of LNPs is simple, inexpensive, and possesses the properties of both lignin and nanomaterials. The sizes of LNPs were controlled. Therefore, this is a good scheme for high-value applications of lignin.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
OPTICS LETTERS
·
2024
·Vol. 49
·期 3
·478-481
·
IF 3.1
Ranran Fan,Junpeng Qiao,Jiaxin Xu,Sujuan Feng,Guangqiang Liu
Due to the superiority of low cost, easy manufacture, and tunable light emission owing to the diversity of compositions and dimensionalities, the metal halides have appeared as a promising class of semiconductors. Nevertheless, the toxicity problem along with inherent instability of Pb-based metal halides greatly limits their large-scale applications. Based on this situation, it is necessary to develop eco-friendly materials, which could simultaneously maintain the excellent optoelectronic properties of lead materials. In this Letter, the one-dimensional Cu + -alloyed Cs2AgI3 has been successfully synthesized. An intense blue emission located at 469 nm with a large Stokes shift was observed. Density functional theory calculation indicated that the Cu+ ions could effectively modulate the density of state population, which was the key factor drastically boosting the photoluminescence quantum yield (PLQY). This kind of highly efficient metal halide may overcome the bottlenecks of toxicity and poor efficiency issues of blue emission and will have a promising prospect in the optoelectronic fields.
研究领域:
材料科学
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光学
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DOI
PubMed
高影响因子
Advanced Photonics Research
·
2022
·Vol. 3
·期 4
·2100289
·
IF 0
Xixi Zheng,Jinxin Huang,Yaoyu Liu,Tianyu Wang,Shiguo Han,Zongqi Wang,Bing Teng,Shaohua Ji
Owing to their excellent photoelectric properties, perovskite materials have broad application prospects; however, the toxicity of Pb limits the application of Pb-based perovskite materials. To overcome this problem, Pb-free perovskite materials are prepared by replacing Pb with nontoxic elements including Ge and Sn; nevertheless, the stabilities of these materials are low. Herein, single crystals of nontoxic Cu(I)-based ternary metal halide (Cs 3 Cu 2 Br 5 ) with outstanding stabilities and self-trapped excition (STE) emission are constructed by an antisolvent method for the first time; these crystals exhibit central blue emission at 458 nm and large Stokes shifts. Photoluminescence (PL) intensities of the single crystals remain above 96.9% of their initial intensities when these crystals are exposed to an atmospheric environment for 90 days. Moreover, the stabilities of the Cs 3 Cu 2 Br 5 single crystals are investigated by temperature-dependent PL spectroscopy, which suggests a considerable exciton binding energy of 503 meV, and derivative thermogravimetric analysis, which indicate that the temperature of complete decomposition of Cs 3 Cu 2 Br 5 is above 930 °C. Furthermore, a new class of white light-emitting diodes with an ultrahigh color rendering index of 97.8 and satisfactory performance is produced using the Cs 3 Cu 2 Br 5 single crystals. The study demonstrates significant potentials of Cu(I)-based single crystals in the field of optoelectronics.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Ting Chen,Yuanhong Chen,Chunxian Guo,Zhixiang Xie,Youpeng Li,Wenkui Wu,Yu Gu
Synthesis of nontoxic quantum dots (QDs) with excellent optical properties in aqueous phase to replace organic dyes with photobleaching drawbacks used in bioimaging has become a research priority. Herein, water-soluble Ag-In-Zn-S (AIZS) QDs were prepared by microwave-assisted hydrothermal method at 110 °C for 40 min. The luminescence peak of AIZS QDs was varied from 684.5 nm to 576.2 nm when the Ag/In molar ratio was changed in the range of 1/2–1/10. A clear blue-shift of PL peak from 616.8 nm to 551.5 nm was observed with increasing Zn 2+ element with the Ag/Zn molar ratio in the range of 1/0–1/14, indicating that the increase of Zn 2+ content caused the increase of band gap. The AIZS QDs exhibit the highest photoluminescent quantum yield (PLQY) of 20.67 % with the molar ratio of Ag/In/Zn=1/6/2, and fluorescence lifetime upped to 294.69 ns. Finally, human hepatocellular carcinomas (HepG2) cells and Hela cells were incubated with AIZS QDs solution at different concentrations and were found to have a high survival rate. Furthermore, HepG2 cells emitted bright yellow light when stimulated upon UV excitation, indicating that AIZS QDs can be applied in bioimaging field.
研究领域:
材料科学
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生物医学工程
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纳米技术
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产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2024
·Vol. 121
·期 23
·e2403544121
·
IF 9.4
Jing-Hang Wu,Tian-Hao Yang,Yi-Jiao Sun,Yuan Min,Yi Hu,Fei Chen,Jie-Jie Chen,Han-Qing Yu
Peracetic acid (PAA) is emerging as a versatile agent for generating long-lived and selectively oxidative organic radicals (R–O•). Currently, the conventional transition metal–based activation strategies still suffer from metal ion leaching, undesirable by-products formation, and uncontrolled reactive species production. To address these challenges, we present a method employing BiOI with a unique electron structure as a PAA activator, thereby predominantly generating CH3C(O)O• radicals. The specificity of CH3C(O)O• generation ensured the superior performance of the BiOI/PAA system across a wide pH range (2.0 to 11.0), even in the presence of complex interfering substances such as humic acids, chloride ions, bicarbonate ions, and real-world water matrices. Unlike conventional catalytic oxidative methods, the BiOI/PAA system degrades sulfonamides without producing any toxic by-products. Our findings demonstrate the advantages of CH3C(O)O• in water decontamination and pave the way for the development of eco-friendly water decontaminations based on organic peroxides.
研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 100
·期 1
·015948
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IF 2.6
Fucheng Yu,Zengguang Huang,Jinghong Zhang,Sihua Zhong
Cu3BiS3 has been considered as an attractive photovoltaic material due to its suitable bandgap, excellent photoelectric properties, abundant component elements and low toxicity. However, most of the reported Cu3BiS3 solar cells contain toxic components in other functioning layers such as CdS in electron-transport layers (ETLs). In this study, the Cu3BiS3 thin films were prepared by spin-coating method. We find that the CuCl concentration in precursor solutions has influences on both the optical bandgap and grain size of the Cu3BiS3 thin films, thus affecting the performance of solar cells. The optimal CuCl concentration is 0.91 M. Besides, Al doped TiO2 (ATO) and MoOx films are employed as ETLs and hole-transport layers (HTLs) respectively, constructing a totally non-toxic thin film solar cell. Moreover, it is demonstrated that the ratio (RAl:Ti) of Al source (Aluminum nitrate nonahydrate) to Ti source [Titanium diisopropoxide bis(acetylacetonate)] in the precursor solution of ATO and the thickness of MoOx have significant influences on solar cells. Moderate Al doping in ATO, e.g. RAl:Ti=1:50, can produce oxygen vacancies and accelerate the interfacial charge transfer, thus resulting in the increased short-circuit current density and fill factor. With the optimized Cu3BiS3 absorber, ETL and HTL, improved cell performances are observed comparted to the spin-coated Cu3BiS3 counterparts with CdS as ETLs in literature.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 35
·15428-15435
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IF 2.7
Shephrah Olubusola Ogungbesan,Onome Ejeromedoghene,Yanina Moglie,Eduardo Buxaderas,Bingbing Cui,Rosemary Anwuli Adedokun,Mulenga Kalulu,Mopelola Abidemi Idowu,David Díaz Díaz,Guodong Fu
In this work, hydrothermal methods and deep eutectic solvents were combined for the first time to prepare tungsten trioxide nanoparticles in an easy and green manner improving their optical and photochromic properties. Characterization of the synthesized nanoparticles was performed via Fourier transform infrared spectroscopy, X-ray diffraction, ultraviolet visible spectroscopy, scanning electron microscopy, energy dispersive X-ray, transform electron microscopy, dynamic light scattering, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The average size of the spherical nanoparticles was ca. 1.83 nm as shown by TEM, and the nanoparticles exhibited high thermostability at least until 900 °C, and photostability and photosensitivity when they were exposed to UV light. Additionally, synthesized tungsten trioxide nanoparticles were found to be nontoxic with maximum cell viability observed even at 100 μg mL−1, making them potential candidates for biomedical applications.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 4
·913
·
IF 3.426
Qiaoguang Li,Xugang Shu,Puyou Jia,Yonghong Zhou
The aim of this study was to develop a facile one-pot reaction for the synthesis of biomass-based hyperbranched poly(ether)s end-capped as acetate esters (BHE) for use as a sustainable, safe and feasible plasticizer for flexible poly(vinyl chloride) (PVC) materials. BHE is completely miscible with PVC but shows weaker plasticizing effect than dioctyl phthalate (DOP) (EΔTgvalue of BHE reaches 64.8%). PVC plasticized with BHE displays greater thermal stability than that of PVC or PVC plasticized with DOP materials. BHE improves the thermal stability and flexibility of PVC materials. As a plasticizer, BHE displays lower solvent extractability and greater volatilization resistance than DOP. Acute oral toxicity indicates that BHE has toxic doses of 5 g/kg, suggesting that BHE is non-toxic.
研究领域:
材料科学
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化学工程
·
环境科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Manman Xie,Ziyang Wang,Qian Lu,Shuming Nie,Christopher J. Butch,Yiqing Wang,Bo Dai
Herein, we present a new magnetic iron oxide nanoparticle (MION) with a succinylated heparin monolayer coating, which exhibits the highest T1 relaxivity at 7 T and the lowest r2/r1 reported for any MION at these high-field conditions. While the recent proliferation of 7 T MRI instruments in hospitals worldwide has enabled widespread access to higher quality, more finely detailed, diagnostic imaging, clinically available contrast agents have not kept pace due to the general phenomenon of reduced efficacy of T1 relaxation as magnetic field strength is increased. Development of new MION agents is one strategy to address this need, and to this end, we demonstrate the in vitro magnetic properties of the MIONs reported here to extend to in vivo applications, providing greatly increased contrast in tumor imaging in a murine xenograft subject at 7 T. While MION-based contrast agents can have side effects in clinical application, these are generally thought to be less than those of gadolinium-based agents and here are further reduced by the small size allowing direct glomerular filtration from the blood followed by renal-excretion. Finally, we show the succinylated heparin monolayer coating to provide class leading magnetic properties over a homologous series of particles with core size ranging from 2 to 18 nm and show the properties to be strongly related to the surface area. We suggest the increased porosity and hydrophilicity of the coating to increase water accessibility to the surface resulting in the increased magnetic properties.
研究领域:
医学影像学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2015
·
IF 4.762
De-Yun Ma,Zhi Li,Jun-Xia Xiao,Rong Deng,Pei-Feng Lin,Rui-Qun Chen,Yun-Qiu Liang,Hai-Fu Guo,Bei Liu,Jian-Qiang Liu
By using a strategy of introducing hydrophobic groups to the linkers, a hydrostable MOF was constructed based on 5-nitroisophthalate and 2,2′-dimethyl-4,4′-bipyridine coligands, revealing a 3D dia topology structure with a 1D channel parallel to the c axis. TGA, PXRD, and water vapor sorption results show high thermal and water stability for the framework. The framework is very porous and possesses not only high busulfan payloads with an encapsulation efficiency up to 21.5% (17.2 wt %) but also very high CO2 selective capture compared with that of other small gases (i.e., CH4, N2, O2, CO, and H2) at 298 K based on molecular simulations due to the pore surface being populated by methyl and nitryl groups. Furthermore, in vitro MTT assays were conducted on four different cells lines with increasing concentrations of the framework, and the results showed that the framework was nontoxic (cell viability >80%) in spite of the concentrations up to 500 μg/mL.
研究领域:
材料科学
·
生物学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2017
·Vol. 27
·期 4
·1495-1503
·
IF 1.461
Lin Bixia,Yu Ying,Liu Fangfei,Cao Yujuan,Guo Manli
Indole propionic acid (IPA) is one of the important plant growth hormones for promoting rooting and fruiting. Labeling IPA receptor in plant tissues is able to further track the signal transduction processes of IPA and uncover the function mechanism of IPA on crop productions. In this paper, a tunable and nontoxic fluorescent probe for IPA receptors was designed and synthetized base on carbon dots (C dots). Firstly carboxyl-modified carbon dots were prepared by high temperature cracking of citric acid. The fluorescence emission wavelengths of C dots varied with the excitation wavelengths change. Then IPA-modified carbon dots (IPA-C dots) were prepared by coupling the amino of tryptophan with the carboxyl of as-prepared carbon dots. Compared with C dots, the fluorescence intensity of IPA-C dots was double and the fluorescence stability was satisfactory under various conditions. This probe retained the biological activity of IPA and acted as target recognition of IPA receptors in plant tissues. The probe could avoid green fluorescence background of plants. The imaging results showed that the IPA receptors mainly existed on the membrane of stele. The toxicity test indicated the probe was less toxic than traditional inorganic semiconductor quantum dots.
研究领域:
植物生物学
·
分子生物学
·
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）