Nanomaterials
·
2022
·Vol. 12
·期 21
·3742
·
IF 5.719
Qiao Li,Xiaosong Zheng,Xiaoyu Shen,Shuai Ding,Hongjian Feng,Guohua Wu,Yaohong Zhang
Colloidal AgBiS2nanocrystals (NCs) have attracted increasing attention as a near–infrared absorbent materials with non–toxic elements and a high absorption coefficient. In recent years, colloidal AgBiS2NCs have typically been synthesized via the hot injection method using hexamethyldisilathiane (TMS) as the sulfur source. However, the cost of TMS is one of the biggest obstacles to large–scale synthesis of colloidal AgBiS2NCs. Herein, we synthesized colloidal AgBiS2NCs using oleylamine@sulfur (OLA–S) solution as the sulfur source instead of TMS and optimized the synthesis conditions of colloidal AgBiS2NCs. By controlling the reaction injection temperature and the dosage of OLA–S, colloidal AgBiS2NCs with adjustable size can be synthesized. Compared with TMS–based colloidal AgBiS2NCs, the colloidal AgBiS2NCs based on OLA–S has good crystallinity and fewer defects.Keywords:AgBiS2;colloidal nanocrystals;hot injection;sulfur source
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 10
·期 1
·2201916
·
IF 6.389
Huazheng Li,Wangwei Lu,Gaoling Zhao,Bin Song,Weixia Dong,Gaorong Han
Due to the ultrafast nucleation and growth rates of perovskite nanostructures during the synthesis, the products are difficult to control, such as its derivatives (e.g., Cs 4 PbBr 6 ) often appear. Here, the hot-injection method is ameliorated by using oleylamine (OAm) instead of octadecene as solvent. The results reveal that in OAm-rich system, the pure nanostructures with different Pb/Br ratios (CsBr, Cs 4 PbBr 6 , and CsPbBr 3 ) can be obtained at different reaction temperatures, and thus controlling the Pb-Br linkage and the interconnection of [PbBr 6 ] 4− octahedra, and resulting in the formation of different nanostructures. As the reaction temperature increases from 120 to 180 °C, the products change from lead-free CsBr nanocrystals to poor-lead Cs 4 PbBr 6 nanocrystals and finally to normal CsPbBr 3 nanocubes and nanowires. Moreover, the synthesized CsPbBr 3 nanowires exhibit an emission peak at 521 nm, full width at half maximum (FWHM) of 19 nm, with photoluminescence quantum yields (PLQY) of 64.9%, and high stability. Furthermore, the white light-emitting diode (WLED) devices are successfully fabricated based on the obtained CsPbBr 3 nanowires, showing high-intensity white light and high stability without any encapsulation. Remarkably, this work provides a new approach for elucidating the synthesis mechanism of perovskite nanomaterials and their applications.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 5
·1924-1928
·
IF 1.821
Guang-Wen Li,Lei Hong,Meng-Sha Tong,Hao-Hua Deng,Xing-Hua Xia,Wei Chen
In this study, it was found that tannic acid could inhibit the chemiluminescence (CL) intensity of luminol–H2O2–cupric oxide nanoparticles significantly. Based on this inhibition effect, a novel and highly sensitive flow injection method with inhibited chemiluminescence was developed for the determination of tannic acid. Under optimum conditions, the net CL intensity was proportional to the concentration of tannic acid over the range of 10–100 nM and the detection limit was 2.6 nM. The relative standard deviation (RSD) for six repeated determinations of 80 nM tannic acid was 2.8%. Note that this method has been successfully used for the analysis of tannic acid in real Chinese gall samples.
研究领域:
分析化学
·
纳米技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 35
·355601
·
IF 3.551
Yanping Fang,Xiangzhe Zeng,Yuanzhi Chen,Mingwei Ji,Hongfei Zheng,Wanjie Xu,Dong-Liang Peng
Building core–shell structures is a valuable method of enhancing the oxidation-resistance performance of Cu nanoparticles for practical applications in the field of printed circuit boards. In this study, Cu@Ni core–shell nanoparticles are synthesized via an injection solution approach utilizing Cu seeds produced during the reactions to induce the epitaxial growth of Ni shells. The thickness of the Ni shell can be controlled by varying the Cu:Ni molar ratios in the injected precursor solution, whereas changing the injection rate of the Cu precursor solution affects the size of the Cu seeds and thus controls the eventual size of the core–shell nanoparticles. Thermogravimetric analysis reveals a superior thermal stability against oxidation for Cu@Ni core–shell nanoparticles, as compared with Cu nanoparticles. The oxidation resistance of Cu@Ni conductive films increases with an increase in the Ni:Cu ratio, while the conductivity increases with a decrease in the Ni:Cu ratio. A relatively low resistivity of 27.4 µΩ cm is achieved for Cu@Ni conductive films. The results demonstrate that coating Cu nanoparticles with Ni shells via epitaxial growth can form closed shells with smooth surfaces which are valuable for Cu nanoparticles in applications where oxidation resistance is a requirement .
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ECS Solid State Letters
·
2014
·Vol. 3
·期 9
·Q41
·
IF 0.781
Mengmeng Hao,Yike Liu,Fangzhou Zhou,Liangxing Jiang,Fangyang Liu,Jie Li
CuSbS2 nanocrystals, synthesized via hot-injection method using oleylamine (OLA) as solvent, exhibited brick-like shape and were recognized as chalcostibite, verified by transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. A high-performance photodetector based on a hybrid film of CuSbS2 nanocrystals and poly (3-hexylthiophene) was constructed. The device showed distinct "ON" and "OFF" states with a ratio of >5 in photocurrents responding to illumination. The high sensitivity and stability of the hybrid device reveals a broad prospect for use of the hybrid material in light detection and signal magnification. In industry, the hybrid material would be a good choice for large-area, low-cost, lightweight, and foldable products.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
LUMINESCENCE
·
2016
·Vol. 32
·期 3
·277-284
·
IF 1.452
Jianqiu Chen,Juan Shu,Jiao Chen,Zhiran Cao,An Xiao,Zhengyu Yan
S,N co-doped carbon quantum dots (N,S-CQDs) with super high quantum yield (79%) were prepared by the hydrothermal method and characterized by transmission electron microscopy, photoluminescence, UV–Vis spectroscopy and Fourier transformed infrared spectroscopy. N,S-CQDs can enhance the chemiluminescence intensity of a luminol–H 2 O 2 system. The possible mechanism of the luminol–H 2 O 2 –(N,S-CQDs) was illustrated by using chemiluminescence, photoluminescence and ultraviolet analysis. Ranitidine can quench the chemiluminescence intensity of a luminol–H 2 O 2 –N,S-CQDs system. So, a novel flow-injection chemiluminescence method was designed to determine ranitidine within a linear range of 0.5–50 μg ml −1 and a detection limit of 0.12 μg ml −1 . The method shows promising application prospects.
研究领域:
分析化学
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药物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2018
·Vol. 42
·期 6
·4337-4343
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IF 3.201
Guo-Qi Zhang,Yong-Sheng Li,Xiu-Feng Gao
Pioglitazone hydrochloride (PGH) can effectively reduce resistance of cells to insulin, and is a widely used treatment for type 2 diabetes. In this study, we discovered that PGH in acidic media could rapidly induce aggregation of gold nanoparticles (AuNPs) to bring about red-to-purple color change caused by electrostatic adsorption and intermolecular hydrogen bonding. Thus, based on this principle, an automatic method with asynchronous-alternating merging-zone was established to determine the PGH content in medicines. Our method involved the calculation of the absorbance ratio and spectrum scanning for two wavelengths. In particular, the proposed method could solve problems of unmanageable aggregation degree, large manual error, and high testing cost in common AuNPs colorimetry. The approach was rapid in sample throughput (a sample/min) under the premise of consumption of 30 μL reagents (8 nmol L−1 AuNPs) per time, high repeatability (RSD ≤ 1.1%, n = 11) and good addition recovery (99–104%) in 0.5–15 mg L−1 range, which is suitable for analyzing PGH content in diabetic medicines.
研究领域:
分析化学
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药学
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纳米技术
✓ 已验证
DOI
高影响因子
Pharmaceutics
·
2018
·Vol. 10
·期 3
·151
·
IF 3.746
Muhammad Sarfraz,Attia Afzal,Tan Yang,Yongkang Gai,Shahid Masood Raza,Muhammad Waseem Khan,Yao Cheng,Xiang Ma,Guangya Xiang
Oleanolic acid (OA), which is a natural pentacyclic terpenoid, has been identified for hepato-protective, nephron-protective and cardio-tonic properties. In contrast, doxorubicin (DOX) is a famous anti-cancer drug but its efficacy is a question mark because of its known cardio-toxicity. We developed a combined nanoliposomal formulation of DOX with OA, as adjuvant, to overwhelm toxic effects of DOX without compromising anticancer activity. The entrapment efficiency and the particle size were brought in limit by the reengineered ethanolic injection method (REIM), without further extrusion. The developed formulations were stable over the study period of two months. A modified HPLC method was employed for the analysis of OA (drug retention time, Tr = 12 ± 1 min). The recovery of OA against spiked plasma samples was more than 90%. MTT assay showed anti-apoptotic synergism against HepG2 cells at non-fixed ratio (combination index, CI < 1). A sustained in vivo drug release of experimental drugs was depicted over 24 h. Histopathological examination and laboratory findings indicated no visible sign of toxicity in the treated mice group against combined delivery. Hence, this combined nanoliposomal formulation was tagged as a safer therapy for the DOX based cancer treatments.Keywords:oleanolic acid;doxorubicin;pegylated liposomes;reengineered ethanolic injection method;cardiotoxicity
研究领域:
药学
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纳米技术
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药物递送系统
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Huimin Yu,Xueqiong Su,Yong Pan,Dongwen Gao,Jin Wang,Ruixiang Chen,Junhe Zhang,Fei Dou,Xinping Zhang,Kun Ge,Xiaoyu Shi,Tianrui Zhai,Li Wang
The whispering gallery mode (WGM) microcavity has a high-quality factor and small mode volume, for the property of confining photons in a small volume for a long time, which enhances the light-matter interaction. Combining with quantum dots that act as gain medium, it can realize low-threshold and narrow-linewidth microlasers with excellent performance. However, achieving conventional whispering gallery mode lasers still requires complex preparation conditions. Here, we report a narrow linewidth whispering gallery mode lasing from all-inorganic perovskite quantum dots (CsPbBr 3 QDs), illustrating facile and cost-effective properties. CsPbBr 3 QDs with excellent properties were synthesized by hot injection method and used as gain media for lasers, and microspheres as optical resonators . The whispering gallery mode laser with a quality factor Q of 4791 and a narrow linewidth of 0.11 nm was obtained at room temperature. The WGM microlaser achieved by this paper could be a great application prospects in biotechnology.
研究领域:
光学
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光子学
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材料科学
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2023
·Vol. 88
·期 5
·2064-2077
·
IF 3.9
Ying Ji,Zhigao Wang,Xingrong Ju,Feng Deng,Feiyu Yang,Rong He
The surfactant rhamnolipid (RL) was used to modify the liposomes. β-carotene (βC) and rutinoside (Rts) were utilized to generate co-encapsulated liposomes through an ethanol injection method that used both hydrophilic and hydrophobic cavities to fabricate a novel cholesterol-free composite delivery system. The RL complex-liposomes loaded with βC and Rts (RL–βC–Rts) showed higher loading efficiency and good physicochemical properties (size = 167.48 nm, zeta-potential = −5.71 mV, and polydispersity index = 0.23). Compared with other samples, the RL–βC–Rts showed better antioxidant activities and antibacterial ability. Moreover, dependable stability was uncovered in RL–βC–Rts with still 85.2% of βC storage from nanoliposome after 30 days at 4°C. Furthermore, in simulated gastrointestinal digestion, βC exhibited good release kinetic properties. The present study demonstrated that liposomes constructed from RLs offer a promising avenue for the design of multicomponent nutrient delivery systems using both hydrophilic.
研究领域:
药学
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食品科学
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纳米技术
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Yucong Ji,Lumeng Liang,Teng Ma,Jinning Hu,Ziyi Chen,Jun Chen
Inorganic perovskites have attracted much attention due to their excellent optical properties , making them a potential material for optoelectronic devices . In order to better apply it to optoelectronic devices, researchers have developed many synthesis schemes, for example, hot injection method, ligand-assisted reprecipitation method, template method, etc. to accurately control chemical composition, dimension, size, photoelectric and other properties. Here, we used oleylamine, octylamine, and phenylethylamine as amine ligands, and synthesized quantum dots (QDs) through the hot injection method. We found that quantum dot solutions prepared with long-chain ligands exhibit better luminescence performance, while quantum dot films prepared with shorter-chain phenethylamine ligands exhibit better luminescence performance, revealing the regulatory mechanism of amine ligands in the quantum dot growth process. In addition, we have enhanced the optical properties of perovskite films through laser direct writing , providing a reference for the synthesis and control of perovskite materials and their applications in the display.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Ruijuan Wang,Chunliu Ma,Haitao Yan,Hailiang Zhao,Pu Wang,Shoubing Zhang,Jianwei Ju,Shuyan Yu,Zhigang Yin
Co-encapsulated hydrophilic vitamin C (Vc) and hydrophobic xanthoxylin (GX-50) liposomes (L-Vc-GX-50) were prepared using ethanol injection and ultrasonic methods and characterized by dynamical light scattering, ζ-potential, cryogenic transmission electron microscopy, UV–vis spectroscopy, Fourier transform infrared spectroscopy, antioxidant capacity, tyrosinase activity, and in vitro permeation measurements. L-Vc-GX-50 are formed by the assembly of egg yolk lecithin, cholesterol, and tween 80, with Vc and GX-50 encapsulated in their hydrophilic and hydrophobic cavities, respectively. By considering the hydrodynamic radius (Rh), ζ-potential, and encapsulation efficiency (EE) of L-Vc-GX-50, the optimum formulation was determined to be egg yolk lecithin/cholesterol/tween 80/GX-50 or Vc (15:3:3:1, w/w) with phosphate buffer (pH 6.8, 0.01 M). The as-prepared L-Vc-GX-50 have an average Rh of 114 nm, a negative ζ-potential (−23.63 mV), a high EE of Vc (73.3%) and GX-50 (87.4%), and a unilamellar vesicle structure. Compared co-encapsulated L-Vc-GX-50 with single encapsulated Vc or GX-50 liposomes (L-Vc or L-GX-50), the EE of Vc in L-Vc-GX-50 is obviously higher than that of L-Vc, while the EE of GX-50 in L-Vc-GX-50 is similar to that in L-GX-50; the antioxidant capacity and tyrosinase inhibition activity of L-Vc-GX-50 are higher than those of L-GX-50 or L-Vc. The in vitro permeation data indicate that the final cumulative permeation amount of Vc and GX-50 in L-Vc-GX-50 can reach around 2.1 and 1.3 mg/cm2, respectively. The release kinetics fitting data show that the release kinetics of L-Vc-GX-50 follows the Korsmeyer–Peppas model and that the release of active ingredients is mainly dominated by the synergistic effect of diffusion release and rupture release. Moreover, L-Vc-GX-50 has good low-temperature storage stability, and the storage stability of GX-50 in L-Vc-GX-50 is significantly improved compared to L-GX-50. The main objective of this study is to improve the instability of Vc and the insolubility of GX-50 in cosmetics.
研究领域:
药剂学
·
纳米技术
·
化妆品
·
药物递送系统
·
分析化学
·
生物物理学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）