COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Zhengyan Zhang,Zhi Teng,Xingwei Li
A good support is essential for the activity and durability of the supported catalysts. In this work, nitrogen-doped carbon with fluffy structure and high content of pyridinic-N and pyrrolic-N is prepared by the pyrolysis of polyaniline/ITO composite, which is conducive to uniform and firm loading of Pt catalysts. Herein, polyaniline is used as carbon and nitrogen sources, and ITO is used as a pyrolysis auxiliary due to the reaction of polyaniline dopant (proton acid) and ITO during the pyrolysis. Pt catalyst supported on above optimal support shows an excellent electrocatalytic performance for the methanol oxidation reaction, especially its stability, achieving an activity retention rate of 89.3% after 1000 cycles of cyclic voltammetry in 0.5 M H 2 SO 4 and 0.5 M CH 3 OH solution. This work provides a new strategy for preparing Pt-based catalyst with a high activity and a good durability.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2013
·Vol. 1
·期 42
·7020-7025
·
IF 0
Xiaoyan Wu,Linlin Liu,Tiancheng Yu,Lei Yu,Zengqi Xie,Yueqi Mo,Shuping Xu,Yuguang Ma
We reported a facile and controllable electrostatic adsorption of gold nanoparticles (Au NPs) on an indium tin oxide (ITO) anode, for applications in polymer light-emitting diodes (PLEDs). Au NPs (size 20 nm) were found to be well dispersed on a pre-treated ITO anode, and the density of Au NPs was well controlled from 0 to 60 μm−2 depending on the adsorption time. By using the Au NPs modified ITO as the anode, the optimized PLEDs showed a 60% enhancement in brightness and 40% enhancement in luminous efficiency. Our results showed that the enhancement of devices performance mainly originated from enhanced photoluminescence, the maximum of luminous efficiency appeared when the distance of Au NPs and light emission profile was about 40–80 nm, which indicated that the origin of enhanced luminescence is due to the “far-field” effect of the Au NPs layer rather than a classical localized surface plasma resonance.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
IEEE Sensors Letters
·
2024
·Vol. 8
·期 8
·1-4
·
IF 2.2
Shuimin Li,Zhongkai Zhang,Jiaming Lei,Zhaojun Liu,Jiangjiang Liu,Meng Wang,Qing Tan,Rui Qi,Bian Tian
Thin-film thermocouples (TFTC) have been extensively studied for their wide range of applications in various environments. However, TFTC faces challenges in electromagnetic environments as they can generate AC interference voltage. In this study, we introduce a thermocouple temperature sensor shielded by silver (Ag) thin film on both sides of aluminum oxide (Al
2
O
3
) substrate. The high conductivity of Ag film (11.48 mΩ/□) helps reduce interference caused by alternating current, resulting in a superior electromagnetic shielding effectiveness of 43.68 dB. The temperature sensitivity coefficient of this sensor is 20.87
$\mu$
V/°C at a hot end temperature of 318.44 °C. These shielded TFTC temperature sensors show great potential for applications in aerospace, iron and steel metallurgy, and other industries.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Hailin Pan,Jie Wang,Zhi Chen,Ziqi Su,Zheng Tang,Zaifei Ma
Developing transparent conductors to replace indium tin oxide (ITO) is a critical objective in the field of organic optoelectronics. Non-atomically doped (NAD) ZnO thin films, while currently exhibiting limited conductivity, are highly promising candidates due to their unique advantages, such as having complete transparency in both the visible and near-infrared spectral regions, solution processability, and the desired surface electronic properties. In this work, the impact of surface modification by insulating polymers on the ultraviolet-enhanced conductivity of NAD-ZnO films is investigated. It was found that polymer modifiers that are rich in amino and hydroxyl groups are effective at increasing the concentration of oxygen vacancies and the conductivity of NAD-ZnO films. The highest conductivity of over 1000 S cm–1, which is more than twice as high as the previous record for NAD-ZnO films, is achieved using polyethylenimine ethoxylated (PEIE) to modify NAD-ZnO films. Subsequently, the replacement of ITO in organic photovoltaic devices by a ZnO/PEIE electrode is realized. The ZnO/PEIE-based OPV devices that were created exhibit performances comparable to those of ITO-based devices under simulated solar illumination and performances better than those achieved with ITO-based devices under simulated indoor illumination. These results make NAD-ZnO a promising candidate for the widespread replacement of ITO in optoelectronic devices.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 48
·19374-19383
·
IF 7.367
Yu Gu,Zhengfeng Zhu,Jizhong Song,Haibo Zeng
While many sophisticated geometries of metallic nanoparticles have been explored for plasmon resonance in the visible light waveband, similar structures for infrared plasmonics have seldom been studied. Herein, for the first time, we report branched colloidal Sn-doped In2O3 (ITO) NCs prepared through heating metal organic precursors in a high boiling solvent and surfactants via a simple one-pot method and their interesting anisotropic infrared plasmonics. Shaped ITO NCs were anisotropically grown into triangles, tripods, and tetrapods from spherical particles by tuning the composition of the surfactants. Interestingly, such anisotropic ITO NCs exhibit shape-dependent localized surface plasmon resonances. A new peak emerged at a low energy band, and the peak intensity increases when the particles become more anisotropic. Meanwhile, a redshift of this newly emerging peak and a blueshift of the original peak can also be observed. The proposed overlapping spheroid model successfully explained those features and the calculated extinction spectra matched excellently with the experimental data. Moreover, the origins of those peaks were also revealed and assigned to in-plane longitudinal and out-of-plane transverse modes, respectively. This work may help design more sophisticated structures for infrared plasmonics and broaden its applications in various areas.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
MEASUREMENT
·
2024
·
IF 5.2
Pengju Huang,Lulu Yang,Fangxin Wang,Xiaoli Fu,Chaojie Hu,Bin Yang
Flexible and multifunctional sensors are in demand in various fields, but achieving excellent sensitivity and an extensive operational range poses a challenge. Here, we developed a flexible strain sensor using a cost-effective dip-coating method, incorporating microcracked synergistic indium tin oxide nanoparticles (ITO NPs) and carbon nanotubes (CNTs) in a conductive layer. Utilizing an elastic rubber core string as the stretchable substrate and Thermoplastic polyurethane (TPU) as an interfacial modifier, we established connectivity between the substrate and conductive layer. After encapsulation with polydimethylsiloxane, the ITO NPs/CNTs/rubber fiber (ICRF) strain sensor was fabricated. This sensor demonstrates a broad sensing range (0 ∼ 300 %), remarkable sensitivity (GF=1033.57), swift response/recovery times (174.55 ms/180.27 ms), and exceptional durability and stability (>2000 cycles). Moreover, it proves effective for human motion detection, underscoring its potential in flexible and wearable devices. Finally, precise responses of the mechanical claw’s posture and grasping demonstrate its potential applications across multiple fields.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULAR AND CELLULAR BIOCHEMISTRY
·
2011
·Vol. 363
·期 1
·309-313
·
IF 2.168
Zhao Hui,Li Ling,Fan Hua-Jun,Wang Fei,Jiang Li-Ming,He Pin-Gang,Fang Yu-Zhi
Communication between cells by release of specific chemical messengers via exocytosis plays crucial roles in biological process. Catecholamines, like dopamine, epinephrine, and norepinephrine, which are types of neurotransmitters released from cells, can be oxidized and detected by the microelectrodes, and amperometric detection of exocytosis is an effective method for studying the communication between cells. The experimental results depend on many factors, among which the property of the microelectrode, cell states, and their positions to each other are particularly important. A type of indium tin oxide (ITO) micro-pore electrodes, which is characterized by its stability, has been developed with photolithography. SH-SY5Y cells can adhere and spread on ITO micro-pore electrodes. Therefore, it is possible to investigate the correlation between cell morphology and exocytosis. The results show that cells with clear process have higher release frequency of norepinephrine compared with cells in spherical shape. Combined with fluorescence observation, this technique provides a simple and convenient methodology for cell study.
研究领域:
神经生物学
·
细胞生物学
·
电化学分析
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiaoyu Zhai,Yujie Chen,Yunqian Ma,Yanchao Liu,Jiaxiang Liu
Indium tin oxide (ITO), a representative transparent conducting oxide (TCO), is widely applied in photoelectric devices. In this work, monodisperse ITO submicro-spheres have been prepared using one-step solvothermal method at 250 °C. l -Histidine (L-His), triethylamine (TEA) and dimethylformamide (DMF) were used as shape controller, base agent and solvent, respectively. Significantly, the effect from process variables on the size and shape of submicro-spheres was studied systematically. L-His was used to promote the formation of spherical morphologies. When reaction time was prolonged from 12 to 24 h, nano-size particles eventually grew into submicron particles. After adding L-His, the size of ITO particles became smaller and the crystal tended to sphere-shape from cubic-shape. Meaningfully, the effect from particle size and morphology plays a key role in the resistivity of resultant powders. Compared with the resistivity of larger particles with mixed morphology prepared without L-His, the one of well-crystallized sphere-shaped small particles prepared with L-His was lower. The range of resistivity was between 0.4 and 0.7 Ω cm when 0.05 M L-His was added. Moreover, uniform spheres with a diameter of 0.29 μm have been obtained by one-step solvothermal method with 1 M TEA and 0.05 M L-His, which have potential application in photonic band gap crystals.
研究领域:
材料科学
·
光电设备
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 4
·1525-1535
·
IF 3.442
Zhang Jian,Jiang Yuting,Zhang Jiaxin,Zhang Lanhe,Wang Bing,Li Zheng,Liu Congze,Wang Haonan
2,4-Dichlorophenol (2,4-DCP) is a kind of toxic organic compound listed as a priority pollutant by the environmental protection agency, which will endanger the environment and human health. The accumulation of 2,4-DCP in the environment has become a serious problem today since 2,4-DCP is difficult to be degraded by traditional methods. In this study, a novel palladium/graphene oxide/indium tin oxide (Pd/GO/ITO) composite electrode was prepared by constant current electrodeposition method. And the surface morphology, crystal structure and surface element valence state of the electrode were observed and analyzed by SEM, XRD and XPS, respectively. Finally, by studying the influence of different conditions on the performance of the electrodes, the electrochemical degradation efficiency of the new electrodes on 2,4-DCP was investigated. It was found that the degradation of the Pd/GO/ITO electrodes on 2,4-DCP followed a quasi-first-order reaction under different conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenyuan Yu,Yanxuan Zhao,Jianping Ge
Anticounterfeiting materials based on the photonic crystal (PC) have attracted great interest due to their unique visual effects originating from the changeable structural colors under various external stimuli. However, there still are challenges to improving the anticounterfeiting performance by enhancing the complexity and diversity of the color changes. Here, we fabricated an electrically triggered anticounterfeiting tag by encapsulating the responsive PC with the surface-modified and patterned ITO electrode. The degree of Au deposition or chemical etching in different regions of the ITO was precisely controlled to achieve multi-level differentiated electrical responses, which made the invisible pattern of the tag at 0 V be “revealed in multicolor form” or “gradually revealed” under increasing voltages. The tag possessed two working modes, more diversified visual effects, good usability, and reversibility, which let it become a potentially useful material for anti-counterfeiting applications in the future.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Microsystems & Nanoengineering
·
2024
·Vol. 10
·期 1
·1-12
·
IF 7.3
Dong Helei,Lu Meimei,Wang Weifeng,Tan Qiulin
Hypersonic vehicles and aircraft engine blades face complex and harsh environments such as high heat flow density and high temperature, and they are generally narrow curved spaces, making it impossible to actually install them for testing. Thin-film heat flux sensors (HFSs) have the advantages of small size, fast response, and in-situ fabrication, but they are prone to reach thermal equilibrium and thus fail during testing. In our manuscript, an ITO–In 2 O 3 thick film heat flux sensor (HFS) is designed, and a high-temperature heat flux test system is built to simulate the working condition of a blade subjected to heat flow impact. The simulation and test results show that the test performance of the thick-film HFS is improved by optimizing the structure and parameters. Under the condition of no water cooling, the designed HFS can realize short-time heat flux monitoring at 1450 °C and long-term stable monitoring at 1300 °C and below. With a maximum output thermopotential of 17.8 mV and an average test sensitivity of 0.035 mV/(kW/m 2 ), the designed HFS has superior high-temperature resistance that cannot be achieved by other existing thin (thick) film HFSs. Therefore, the designed HFS has great potential for application in harsh environments such as aerospace, weaponry, and industrial metallurgy.
研究领域:
航空航天工程
·
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 3
·3067-3074
·
IF 1.798
Li Jiali,Yan Luting,Wang Huili,Wang Haiwei,Chen Xiao,Wang Lei,Wu Meng
Gold nanoparticles (NPs) were deposited directly on an indium tin oxide (ITO) substrate using the successive ionic layer adsorption and reaction (SILAR) method by chemically reducing precursor metal salts with dopamine aqueous solution. The Au NPs decorated on the ITO substrate were approximately spherical, with an average particle size of about 40 nm, which varied in accordance with different SILAR cycles, reactant concentrations, and intermediate media. Strong surface plasma resonance characteristics were confirmed by the surface-enhanced Raman scattering and absorption spectra of the Au NPs. Through this simple method, glucose sensors based on this kind of Au NPs/ITO exhibited a sensitivity of 524 μA mM −1 cm −2 , which is higher than any other similar study.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 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）