JOURNAL OF NANOPARTICLE RESEARCH
·
2013
·Vol. 15
·期 9
·1-7
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IF 2.175
Zong Kai,Lu SiHeng,Wang Hao,Sun YuXiu,Liu JingBing,Yan Hui
Cu 2 ZnSnSe 4 quantum dots (QDs) with controllable sizes have been synthesized via a hot-injection method. The diameters of the QDs range from 3.2 to 10.1 nm with the tunable band gap from 1.27 to 1.54 eV by adjusting the reaction temperatures from 180 to 240 °C. Structural and Raman scattering data confirm that Cu 2 ZnSnSe 4 is obtained without other secondary phases. The band gaps of the QDs with diameters less than 4.6 nm show an obvious blue shift to higher energy due to quantum confinement effect. It indicates that the Cu 2 ZnSnSe 4 QDs can be a potential candidate for quantum-dot-sensitized solar cells in the future.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2023
·Vol. 220
·期 13
·2300087
·
IF 2
Zhou Zou,Dengwei Zhang,Arun Murali,Chaoyi Chen,Li Liu,Yuanpei Lan,Junshan Zhang,Fengyuan Liu,Zhiyao Chu,Deyang Ning,Junqi Li
Herein, size-controllable spherical yttrium carbonate powders with D 50 in range from 225 to 743 nm are synthesized from Y(NO 3 ) 3 ·6H 2 O and urea. With the rise of the concentration ratio of urea/Y 3+ , temperature, and extension of aging time, diameter of yttrium carbonate spheres increases. When the urea/Y 3+ is 40: 1 and ages for 4 h at 90 °C, the D 50 of synthesized powder, which has been determined as Y(OH)CO 3 ·1.3H 2 O, has the largest D 50 of 743 nm with (D 90 –D 10 )/2D 50 of 0.22. After decomposition, the D 50 of formed Y 2 O 3 decreases to 632 nm, the (D 90 –D 10 )/2D 50 is 0.24, and the D 50 of Y 2 O 3 is in the range of 126–632 nm. Then, 6 mol. % Eu 3+ is homogeneously doped into Y(OH)CO 3 ·1.3H 2 O and Y 2 O 3 : Eu 3+ spherical powder is obtained after roasting, which exhibits a strong emission peak at 613 nm. The developed synthetic method and the obtained size-controllable spherical Y(OH)CO 3 ·1.3H 2 O, Y 2 O 3 , and Y 2 O 3 : Eu 3+ with a uniform size distribution own various potential applications.
研究领域:
材料科学
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化学工程
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高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 14
·1888-1895
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IF 3.474
Chao Cai,Tang Zhu,Dongdong Li,Yun Ran,Haixia Dong,Ning Zhao,Jian Xu
In this paper, tannic acid (TA) was used to assist the fabrication of spherically aggregated Cu2O–TA hybrid sub-microparticles with good chemical stability and controllable sizes. TA exhibited multiple functions in the synthesis: the reductant for the formation of Cu2O crystal seeds, the stabilizer of the primary Cu2O crystals and the protector against the oxidation of Cu2O. A probable mechanism was presumed, including 1) seed formation and TA encapsulation, 2) primary crystal nucleation and growth, and 3) aggregation into spheres. We found that pH played a key role in determining the final morphology of the product while the precursor concentration strongly influenced the size of the particles. At a suitable pH, hierarchically structured Cu2O–TA sub-microspheres with nanocrystals as building blocks were produced. The size of the spheres can be tuned from 130 to 670 nm by adjusting the precursor concentration. Cu2O–TA hybrids exhibited excellent chemical stability against water and oxygen. The method reported here possessed many advantages like cost-effectiveness, facility of preparation, environmental friendliness, chemical stability and excellent adjustability. The properties of the prepared Cu2O particles might facilitate their applications in marine antifouling paints, adsorption materials and antibacterial agents.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Applied Sciences-Basel
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2019
·Vol. 9
·期 23
·5157
·
IF 2.217
Yongpeng Chen,Jianguo Zhang,Zhixin Wang,Zunning Zhou
Superparamagnetic iron oxide nanoparticles are of great interest in magnetic targeted drug delivery due to their unique properties. In this paper, size-controlled superparamagnetic iron oxide nanoparticles were synthesized in an ethylene glycol/diethylene glycol (EG/DEG) binary solvent system via a facile solvothermal method. X-ray diffraction (XRD), a scanning electron microscope (SEM), and a vibrating sample magnetometer (VSM) were used to confirm that the prepared samples were superparamagneticFe3O4nanospheres. When theVEG/VDEGwas varied from 100/0 to 80/20, 60/40, and 40/60, the average diameters of the resultingFe3O4nanospheres were approximately 700, 500, 300, and 100 nm, respectively. In addition, the saturation magnetization (Ms) ofFe3O4nanoparticles with a size of 100, 300, 500, and 700 nm was 72.14, 75.94, 80.28, and 85.41 emu/g, and the corresponding remanent magnetization (Mr) was 3.34, 3.97, 3.26, and 4.28 emu/g, respectively. The relevant formation mechanisms ofFe3O4nanoparticles are proposed at the end. These superparamagneticFe3O4nanoparticles with high saturation magnetization may have use as targeted drug carriers.Keywords:targeted drug delivery;superparamagnetic;size-controlled;solvothermal method
研究领域:
材料科学
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纳米医学
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DOI
高影响因子
MATERIALS LETTERS
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2021
·
IF 3.423
Daixiong Zhang,Qing Xiang
As one of most studied MOFs , extensive efforts have been devoted on the novel strategy for tailoring the size of zeolitic imidazolate framework (ZIF-8). We report here a facile and general method that enables the size-controllable engineering of zeolitic imidazolate framework (ZIF-8) by changing the addition order of Zn(NO 3 ) 2 ·6H 2 O (A) and 2-methylimidazole (B), which is very different from the all reported methods. Significant size difference for ZIF-8 s was observed between adding A-methanol solution to B-methanol solution and adding B-methanol solution to A-methanol solution under room temperature magnetic stirring. The influence of addition order on the crystal size was also applicable for preparing ZIF-8 encapsulating metal precursor (M-ZIF-8). We believe that this work not only pave a new way for efficient and general size-controllable design of ZIF-8 and M-ZIF-8, but can be also bridged with other size engineering methods (such as solvothermal method).
研究领域:
材料科学
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化学工程
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高影响因子
RSC Advances
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2016
·Vol. 6
·期 70
·66048-66055
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IF 3.289
Jianzhou Wu,Jing Zhao,Hehe Qian,Lei Yue,Yongsheng Guo,Wenjun Fang
Although shape and size controllable palladium nanocrystals have attracted enormous attention, the growth behavior of Pd nanocubes is not thoroughly understood. In this work, the growth pattern of size controllable Pd nanocubes is studied systematically under a variety of reaction conditions. During the growth process of the Pd nanocubes, various structures including concave cubes, triangular bipyramids, pentagonal bipyramids (decahedrons) and pentagonal rods can be generated due to the disparate behavior of the fresh Pd atoms. Different-sized nanocubes are prepared controllably by changing the dosage of KBr, which provides capping capacities toward the {100} facets that the cubes are enclosed with. Both ascorbic acid (AA) and KBr influence the reducing rate of the Pd precursors and the growth kinetics of the nanocrystals, and furthermore control the morphologies of the products. This detailed research supplements the understanding of crystal growth, and provides insight toward the comprehension of atom movements at the nanoscale.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Meng Zhang,Pengfei Wang,Mingyuan Wu,Qingyun Wu,Jianjun Yang,Jiuyi Liu,Jianan Zhang
In the current research, we are committed to solving the irreconcilable contradiction between fragmentation, agglomeration, poor size controllability, and high solid content in the preparation of BiOCl crystals. Water soluble block polymer polyethylene glycol monomethyl ether-b-polydimethylaminoethyl methacrylate (mPEG-b-PDMAEMA) was synthesized as dispersant to achieve high solid content by reducing the frequency of crystal collisions to avoid crystal fragments and agglomerates. With the reaction temperature of 80 °C, urea dosage of 40 g, bismuth salt solution addition rate of 0.45 ml/min, and variable amount of pre-added HCl in the reaction vessel, fragment-free BiOCl crystals of wide size ranges were successfully obtained with record-high solid content of above 10 wt%. Furthermore, bio-based pearlescent coatings were prepared by using as-synthesized BiOCl crystals as pearlescent pigments and polyglyceryl tetrastearate and polyphenyl polymethylene polyisocyanate (PAPI) as the formulations of two-component solvent free polyurethane . The decorative polyurethane coatings demonstrated excellent physical properties and corrosion resistance , which exhibited eye-catching gloss effects from pearl luster, glitter pearl luster, to shimmering luster derived from the size variation of 20, 50, and 70 µm, respectively. The large-scaled production of size controllable BiOCl crystals with high solid content in wide size range promises the practical applications in decorative coatings, cosmetics, clothing accessories, and car interior accessories.
研究领域:
材料科学
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化学工程
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高影响因子
Small
·
2025
·
IF 12.1
Riliga Wu,Hongyu Dai,Weijiang Guan,Chao Lu
Clusteroluminescence (CL) clusters in the absence of aromatic or π-conjugated structures have emerged as a new family of luminescent materials due to their abundant sources and inherent biocompatibility. However, there is an inborn challenge in controlling the size of CL clusters from random aggregation of micrometers to ordered assembly of sub-10 nanometers. Such an inherent drawback significantly restricts their progress from theoretical research to practical applications. To address this obstacle, a novel approach using space-confined templates is proposed to synthesize CL clusters with tunable sizes. Space-confined templates with sizes of ≈2–6 nm are constructed to effectively confine non-aromatic molecules, yielding size-controllable and luminescence-tunable CL clusters. The versatility of this synthetic strategy is further proved by using non-conjugated molecules, such as L-valine and L-isoleucine. Finally, the potential applications of the synthesized CL clusters have been implemented in cell nucleus imaging owing to their sub-10 nm size and efficient luminescence. The success of this work not only offers a versatile space-confined approach to synthesize size-tunable CL clusters within sub-10 nm, but also opens new avenues for the deployment of CL clusters in advanced applications.
研究领域:
材料科学
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生物医学工程
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化学合成
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DOI
PubMed
高影响因子
LAB ON A CHIP
·
2024
·Vol. 24
·期 10
·2802-2810
·
IF 6.1
Huihui Xu,Zhaoxun Wang,Wei Wei,Tiechuan Li,Xuexin Duan
Liposomes have garnered significant attention owing to their favorable characteristics as promising carriers. Microfluidic based hydrodynamic flow focusing, or micro-mixing approaches enable precise control of liposome size during their synthesis due to the comparable size scale. However, current microfluidic approaches still have issues such as high flow rate dependency, complex chip structures, and ease of clogging. Herein, we present a novel microfluidic platform for size-tunable liposome synthesis based on an ultra-high-frequency acoustic resonator. By designing the shape and orientation of the acoustic resonator in the three-phase laminar flow, it combined the features of both hydrodynamic flow focusing and rapid micro-mixing. The distribution of lipid precursor solution in laminar flow and the mixing conditions could be regulated by the confined acoustic streaming vortex. We successfully synthesize liposomes with adjustable sizes and narrow size distributions. Notably, this platform regulates the product size by adjusting only the input power, which is less dependent on the flow rate. Furthermore, the vortex-like fluid flow generated along the device edge effectively prevents precipitation due to excessive lipid concentration or contact with the wall.
研究领域:
生物工程
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药剂学
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DOI
PubMed
高影响因子
Journal of Central South University
·
2016
·Vol. 23
·期 11
·2784-2791
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IF 0.562
Tian Qing-hua,Ning Wen-bo,Wang Wei-jia,Yuan Xiu-hong,Bai Zhi-ming
Large scaled uniform and size-controllable magnetic submicroparticles (MSPs) were synthesized via solvothermal method with ferric chloride as iron source and sodium acetate as trapping agent. The influence of Fe 3+ and NaAc contents on the size distribution of MSPs was investigated. The structural and morphological properties of the synthesized particles were studied by scanning electron microscopy (SEM), X-ray power diffraction (XRD) and vibrating sample magnetometer (VSM). The well-dispersed MSPs with size of 100-1000 nm were obtained by simply adjusting the contents of Fe 3+ and NaAc. In addition, the hemolysis and cytotoxicity of Fe 3 O 4 MSPs, and their ability to case arrest in cell life-cycles were studied. The results indicate that larger size could lead to lower hemolysis. From MTT(3-(4,5-dimethylthuazol-2-yl)-2,5-diphenyltetrazolium bromide) assay, the interactions between MSPs and adhesive mouse fibroblast cell line(L929) were probed. Larger size of Fe 3 O 4 MSPs demonstrates lower cell viability following an exposure to the cells.
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
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 2
·1-8
·
IF 5.479
Xia Hongjun,Wang Jun,Chen Gang,Liu Jiawei,Wan Guangpin,Bai Quan
Monodisperse SiO 2 @SiO 2 core-shell silica microspheres (CSSM) with enlarged mesopores perpendicular to the particles surface were prepared using a dual-templating approach. With cetyltrimethyl ammonium bromide as the template and octyltrimethyl ammonium bromide as an auxiliary chemical, the pore size can be enlarged from 2.6 to 10.6 nm. The average shell thickness can be increased from 31 nm to 97 nm by adjusting the concentrations of the surfactants under continuous addition of tetraethyl orthosilicate. After coating twice, the resulting CSSM has a uniform mesoporous shell of about 198 nm thickness and a narrow pore size distribution. The CSSM were then modified with octadecyltrichlorosilane to give a material referred to as CS-C18. It was evaluated by separating the mixture of methylbenzene (toluene), ethylbenzene, n-propylbenzene, n-butylbenzene, n-amylbenzene and hexylbenzene. The baseline separation of the six alkyl benzenes is achieved within 2 min. Compared to a commercial column of type BEH-C18, CS-C18 shows a faster and better separation even at lower back pressure. It was also applied to the fast separation of benzo[a]pyrene, salbutamol, ractopamine and clenbuterolin residues in pork samples. The high column efficiency and better reproducibility suggest that the CSSM can be used as a matrix for fast separation and analysis of several kinds of small analytes.
A dual-templating approach was utilized to produce the core shell microsphere with controllable mesopore channels by using hexadecyltrimethylammonium bromide (CTAB) as the template and trioctylmethylammonium bromide (TOMAB) as an auxiliary chemical to enlarge the size of CTAB micelles.
研究领域:
材料科学
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分析化学
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DOI
PubMed
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-8
·
IF 3.998
Kou Juanrong,Wang Yongkai,Liu Xiaoyu,Zhang Xianju,Chen Gaoyu,Xu Xiangxing,Bao Jianchun,Yang Kaili,Yuwen Lihui
Antimony nanocrystals (Sb NCs) are of interest in energy storage, catalysis and cancer therapy for its special physical, chemical and biomedical properties. However, methodology challenges still remain in preparation of colloidal Sb NCs, due to the restricted reaction solution systems, high temperature and time costing for common routes. Herein, size controllable colloidal Sb NCs were continuously prepared by pulsed laser ablation of Sb target in different solvents, owning to the metal nanodroplet explosive ejection and thermal evaporation mechanisms. These well dispersed and stable Sb NCs showed excellent photothermal property in the near-infrared-II window.
研究领域:
材料科学
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生物医学工程
·
纳米技术
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）