JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 1
·480-488
·
IF 1.338
Kaili Zhang,Yongguo Du,Shimin Chen
This study reports the development of a facile and efficient one-pot polyol method for the synthesis of silver nanowires. The seed and growth of silver nanowires under different reaction conditions were characterized and measured. The pertinent variables such as temperature, time, concentration
and capping agent were investigated. Moreover, the effect of seeding at two different stages—initial stage and secondary stage–was studied and discussed on the size control of silver nanowires. In particular, silver nanowires with diameter less than 40 nm and length over 25 μm
in a narrow distribution, was obtained through a novel method in which reaction flask was placed in a lowtemperature bath after seeding for some time in the high-temperature bath. This approach may be useful for the fabrication of uniform, large aspect ratio silver nanowires for optoelectronic
applications.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Jiyan Wei,Xiaoquan Li,Fuping Bian,Jun Zeng,Jiwen Hu,Tongqiang Zong,Na Li,Shudong Lin
High purity silver nanowires (AgNWs) have received a lot of attention from researchers in the field of conductive materials. Conventional polyol synthesis method of AgNWs inevitably leads to the formation of byproduct such as silver nanoparticles. These silver nanoparticles weaken the performance of AgNWs-based flexible displays and must be cleaned up by the purification steps. In this article, we reported a facile and simple method for the synthesis of high purity AgNWs with aspect ratio over 1500 by a one-pot polyol method using silver chloride (AgCl) suspension as nucleating agents via a heterogeneous nucleation mechanism. The process of AgNWs formation was revealed by characterizing UV–vis absorption spectra at different reaction steps, then the process of AgNWs growth from nucleating agents was hypothesized. The reaction temperature and the amounts of AgCl suspension were discussed to investigate their effect on morphology of AgNWs. The high purity silver nanowires prepared via this way are ideal materials for flexible transparent conductive films and will be widely used in flexible displays, solar cells and sensors.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2017
·Vol. 4
·期 7
·075052
·
IF 1.068
Bowen Lei,Jie Wang,Yongguo Du,Kaili Zhang
Silver nanowires (Ag NWs) of different aspect ratios have emerged as promising materials toward manufacturing optoelectronic devices for various applications. We report herein a facile, polyol-based one-pot strategy that has allowed us to synthesize Ag NWs ranging in length from 4–7 to 20–34 µm and diameter of 49 ± 10 nm, by simply controlling the concentration of MnCl2 and KBr. The kinetics of Ag+ converted to Ag0 have been thoroughly investigated, revealing that the introduction of MnCl2 and KBr plays a key role toward the growing of Ag NWs with a high aspect ratio. Cl− and Br− would significantly influence the reaction rate of Ag+ as well as the reaction activation energy, which controls the nucleation, seeding and growth process of Ag NWs. In addition, MnCl2 and KBr promote an efficient conversion of Ag+ and thus, productivity of Ag NWs up to 90% and 70%, respectively. Without further post-treatment, the conductive film made of this Ag NWs on glass had a sheet resistance of 24 Ω/sq and the specular transmittance of it were 92.4%, which proved it is highly potential for optoelectronic applications.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 10
·2315
·
IF 3.2
Songya Feng,Anxin Gao,Zihang Ma,Hongjie Xu,Zhiyong Xue
The general polyol methods used for synthesizing copper nanoparticles (CuNPs) usually require high temperatures to ignite the reduction reaction, which leads to the difficulty of controlling the particle size. Herein, a new polyol method for the size-controllable synthesis of CuNPs at low temperatures by adopting high-pressure hydrogen as the reductant is verified. It is proven that hydrogen is capable to reductively produce CuNPs at temperatures as low as 120 °C. The size of the CuNPs can be controlled between 19.29 nm and 140.46 nm by adjusting the hydrogen pressure, the reaction temperature, and duration. An empirical relationship between temperature and particle size is proposed. This work verifies a low-temperature strategy to synthesize nanoparticles with good size-controllability.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2019
·Vol. 13
·期 5
·964-973
·
IF 7.804
Ronghui Que,Maolin Li,Hong Yao,Xiuhua Wang,Fan Liao,Mingwang Shao
Graphical Just add water : A mere trace of water roughly halves the size and regulates the composition of polyhedral Ni x Co 1− x alloy nanoparticles prepared by the polyol method. The Ni 0.6 Co 0.4 nanoparticle alloy obtained by adding 70 μL of water shows superior electrocatalytic performance in the methanol oxidation reaction owing to its appropriate Ni/Co ratio and is a promising electrocatalyst for use in direct methanol fuel cells. Highly active Ni-based catalysts have attracted much attention but are still facing challenges owing to the immature synthetic method. Herein, polyhedral Ni x Co 1− x alloy was prepared by a facile modified polyol method in which a trace amount of water could halve the particle size of the alloy. The Ni/Co ratios in Ni x Co 1− x alloy strictly depended on the used amount of water owing to the different solubilities of the precursors. Among them, the Ni 0.6 Co 0.4 nanoparticles obtained with 70 μL of deionized water exhibited the best performance in the methanol oxidation reaction with a peak current density of 116 mA cm −2 in the presence of 1 m NaOH+0.5 m CH 3 OH solution, which is higher than those of Ni 0.7 Co 0.3 (80 mA cm −2 ) and Ni 0.5 Co 0.5 (33 mA cm −2 ). The excellent performance of Ni 0.6 Co 0.4 is attributed to the unique structure with appropriate Ni/Co ratio, which elongates the C−O bond in methanol and lowers the reaction free energy according to DFT calculations.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 12
·15622-15632
·
IF 2.478
Zhai Xin,Wang Wenxian,Jia Jing,Dong Peng
Silver nanowires (AgNWs) are promising candidate materials for flexible transparent conductive films (FTCFs), which are key parts in fabricating flexible optoelectronic devices. In the present work, we developed a modified polyol method, allowing simple and rapid synthesis of AgNWs with an ultra-high aspect ratio up to 2600, by adjusting the concentration of Cl − and Br − . Further, AgNWs–mixed cellulose ester membrane (MCE) FTCFs by vacuum filtration method were fabricated, exhibiting low sheet resistance of 6.53 Ω/sq and transmittance of 83.20%, which are comparable to those of typical indium tin oxide electrodes. Also, mechanical robustness results show the sheet resistance of the AgNWs–MCE film increased 16 and 2.8% after 300 times bending tests and 100 times of adhesion tests, respectively.
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 ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Wen Wu,Manjing Wang,Limin Liang,Yufei Yan,Xuerong Zheng,Qiuyan Hao,Hui Liu,Jun Zhang,Caichi Liu
The length effects on photoconductivity have been observed in Sb 2 Se 3 nanorods with uniform diameter grown by a hot-injection polyol process. The phase formation and morphology evolution of Sb 2 Se 3 nanorods were investigated by XRD and TEM analysis. By changing the reaction temperature from 150 °C to 250 °C, the sizes and aspect ratios of Sb 2 Se 3 nanorods can be easily controlled, with an average length ranged from 0.6 μm to 3.2 μm. The length-controlled nanorods were directly used for fabricating prototype photodetectors to explore their length-dependence performances. A significant increase of photoresponse with length elongation has been observed, in which the optimal device displays a remarkable response to simulated solar light with a high switching “on/off” ratio of 320, short response/recovery times (0.15/0.16 s) and long-term durability. This length-dependence property on photodetectors can be considered as an important step to promote the performance of 1D Sb 2 Se 3 nanomaterials .
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
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Ge Cao,Yonghao Chen,Chengwei Jiang,Jiatong Xu,Wei Xue,He Zhang,Yanqing Tian
Tin (Sn) metallic material is one of the best-known metals and has been extensively studied due to its ease of processing, low melting point, and low cost. However, it is still challenging to synthesize high-processing performance and antioxidant Sn nanoparticles with tunable sizes. This research reported a facile, easy-to-scale-up polyol-mediated synthesis of Sn nanoparticles assisted by sodium citrates as a capping agent. The presence of citrate capping facilitated uniform nucleation of Sn nanoparticles and enhanced their antioxidant capacity and dispersion properties. These nanoparticles can remain stable against oxidation for more than 270 days in an ambient atmosphere, even under continuous heating at 200 °C for over 12 h. The citrate capping also inhibits interparticle agglomeration and allows the preparation of high-quality suspensions in water and many conventional organics. Moreover, efficient size tuning over a wide range (60 nm–1 μm) can be achieved simply by changing the Sn2+ precursor concentrations. The above-mentioned antioxidant capacity and processability allow them to combine with silver flakes in thermosetting epoxy resin as complementary conductive fillers effectively, creating conductive pathways among the silver flakes to obtain high-performance electrically conductive adhesives (ECAs). By adding Sn nanoparticles as complementary conductive fillers, the resistivity of the ECAs can be reduced to 1/6000 of that of the ECAs filled with only the same mass ratio of silver flakes, exhibiting its great potential in future electronics.
研究领域:
材料科学
·
纳米技术
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2021
·Vol. 44
·期 2
·1-8
·
IF 1.783
Zhang Hui-mei,Zhang Yan,Zhang Jia-wen,Ye Xu,Li Yuan-yuan,Wang Ping
In this study, silver nanowires (AgNWs) were prepared by the polyol method using silver nitrate (AgNO 3 ) as the silver source and polyvinylpyrrolidone (PVP) as the structure-directing agent under different reaction conditions. In order to obtain AgNWs with good uniformity and electrical conductivity, the orthogonal experiment method was adopted to design an experimental scheme. The scanning electron microscope, energy-dispersive X-ray spectrometer, X-ray diffraction, UV-2550 UV–Visible spectrophotometer, transmission electron microscope, Fourier transform infrared and Raman spectra were combined to characterize synthesized AgNWs. It can be concluded from experimental data that when the reaction temperature is 150°C, the ratio of AgNO 3 to PVP is 1:3, the drop rate of PVP is 65 ml h –1 , with the existence of ferric chloride (FeCl 3 ), and the AgNWs exhibit optimal morphology with the diameter ranging from 60 to 200 nm. The results in this study will provide experimental guide for controllable formation of AgNWs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2013
·
IF 3.473
Jinyan Xiong,Gang Cheng,Fan Qin,Runming Wang,Hongzhe Sun,Rong Chen
A facile polyol-mediated solvothermal method was developed to fabricate BiOCl hierarchical nanostructures (HNs) with controllable morphologies. The obtained BiOCl hierarchical nanostructures were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–vis diffuse reflection spectroscopy (DRS) and nitrogen adsorption. The BiOCl hierarchical nanostructures (HNs) with ellipsoid-like, sphere-like and flower-like morphologies were constructed of intercrossed nanoflakes or nanosheets. The polyols played significant roles in the fabrication of BiOCl hierarchical nanostructures, which functioned as solvents, reducing and morphology-directing agents. Importantly, the BiOCl hierarchical nanostructures exhibited excellent shape-dependent visible-light-driven photocatalytic activities for Rhodamine B (RhB) degradation, which was much higher than that of 2D BiOCl nanosheets, nanoplates, commercial BiOCl and TiO 2 (anatase). The highly enhanced photocatalytic activities could be ascribed to the contributions of their hierarchical nanostructures, large BET surface areas, strong adsorption capacities and superhydrophilic properties.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 31
·15920-15926
·
IF 7.443
Pei Song,Jiu-Ju Feng,Fei-Ying Guo,Ai-Jun Wang
In this work, porous bimetallic palladium–silver (Pd63Ag37) alloy nanocorals were synthesized by a simple and facile one-pot polyol method. The composition and morphology of the nanocrystals were well controlled by changing the concentrations of the precursors. The obtained nanocrystals were mainly characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and the Brunauer–Emmett–Teller method. Porous Pd63Ag37 nanocorals had an enlarged electrochemically active surface area (55.85 m2 g−1), and exhibited enhanced electrocatalytic activity and improved stability for glycerol oxidation reaction as compared to commercial Pd black, owing to the unique porous coral-like nanostructures and synergistic interactions of the alloyed bimetals.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Express
·
2021
·Vol. 2
·期 2
·020001
·
IF 0
Wangchuan Xiao,Zhizhong Su,Yan Zhao,Chuanyuan Wang
A microwave assisted polyol process accomplished within 10 min was developed for synthesis of superparamagnetic Fe3O4 nanoparticles (MNPs) with well controlled size between 2 and 6 nm. Effects of reaction time and temperature on the size of the MNPs were investigated through transmission electronic microscope, x-ray diffraction pattern, thermogravimetic and magnetic analysis. The results indicates that longer reaction time or higher temperature lead to formation of MNPs with larger size. As a proof-of-concept, the MNPs were utilized as peroxidase and their activity was also investigated. Oxidation of typical substrate, 3, 3', 5, 5' -tetramethylbenzidine, can be proceeded by using the MNPs as artificial mimic enzyme. The MNPs display the maximal catalyzed activity under the optimum condition as pH = 3.5, 40 °C and concentration of TMB and H2O2 with 120 and 110 mmol·l−1, respectively. This work provides a new way for fast synthesis of MNPs, which are of potential application in artificial mimic enzyme.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）