ACS Applied Materials & Interfaces
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2018
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IF 8.097
Junli Wang,Hongsong Yu,Tingting Wang,Yajie Qiao,Ying Feng,Kangmin Chen
The chemical composition, size and shape, and surface engineering play key roles in the performance of electronic, optoelectronic, and energy devices. V2VI3 (V = Sb, Bi; VI = S, Se) group materials are actively studied in these fields. In this paper, we introduce a colloidal method to synthesize uniform ternary (BixSb1–x)2S3 (0 < x < 1) nanorods. These nanorods show composition-dependent aspect ratios, enabling their composition, size, and shape control by varying Bi/Sb precursor ratios. It is found that the surface passivation by various thiols (L–SH) efficiently enhances the photoconductivity and optical responsive capability of (BixSb1–x)2S3 nanorods when used as active materials in indium tin oxide (ITO)/(BixSb1–x)2S3/ITO optoelectronic devices. Meanwhile, the increase of Sb content causes a gradual deterioration of photoconductivity of thiol-passivated nanorods. We propose that the thiol passivation is able to reduce the number of S vacancies, which act as the recombination centers (trapped states) for photogenerated electrons and holes, and thus boosts the carrier transport in (BixSb1–x)2S3 nanorods, and in particular that the composition-related conductivity deterioration is attributed to the increase of unpassivated S vacancies and surface oxidation due to the rise of Sb content.
研究领域:
材料科学
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光电材料
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纳米技术
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Haiyan Zhang,Fei Feng,Yangyang Zhao,Bin Zhao,Lei Li,Dan Zheng,Xinxin Li
Increasing the aspect ratio of the microchannels of microfabricated gas chromatographic columns (μGCCs) can allow analytes to quickly reach equilibrium between the stationary phase and mobile phase , which helps improve their separation performance. In this paper, an all-silicon microfabricated gas chromatographic column (AS-μGCC) with a high aspect ratio was proposed and fabricated using deep reactive-ion etching (DRIE) and silicon direct bonding. Two AS-μGCCs with the lengths of 2 m and the aspect ratios of 6.6 (100 µm-width × 660 µm-depth) and 25 (30 µm-width × 750 µm-depth) were successfully fabricated. The effects of different aspect ratios on the column efficiency of AS-μGCCs were studied. A separation experiment showed that the column efficiency of the AS-μGCC with an aspect ratio of 25 (AS-μGCC-25) was 12 times higher than that of the AS-μGCC with an aspect ratio of 6.6 (AS-μGCC-6.6). The column efficiency of the AS-μGCC-25 was 1961 plates/m, and a heavy hydrocarbon mixture (C8–C20) could be separated using AS-μGCC-25 within 4.5 min
研究领域:
分析化学
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微制造技术
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SENSORS AND ACTUATORS A-PHYSICAL
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2022
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IF 4.291
Jiannan Sun,Aizhao Pan,Ke Yan,Pan Zhang,Yinghao Chen,Wei Xiong,Xuehang Chen,Jun Hong
Metal-organic frameworks (MOFs) have shown great potential as a new platform for developing solid-state light-emitting temperature probes . Herein, we synthesized Eu-BTC (MOFs) with controllable nanowire and nanorod morphologies by changing solvents. Eu-BTC Nanowire was produced from DMF with a size of 15 µm and a 21.5 % photoluminescence quantum yield (PLQY), while the nanorods from H 2 O yielded with a size of 200 nm (PLQY=17.4 %). The Eu-BTC materials exhibited highly variable temperature properties depending on the morphology. Eu-BTC Nanowire from DMF presented better temperature dependence as a highly sensitive temperature probe owing to its higher linearity and more excellent temperature-dependent reversibility , which further demonstrated its potential for application as a temperature probe. While, the Eu-BTC nanorod from H 2 O showed a non-linear relationship with temperature and low temperature-dependent reversibility , making it unsuitable as a temperature probe. The morphologies-dependent luminescence sensing mechanism of Eu-BTCs and the heat conduction induced by surface defects mechanism were proposed. This work provides theoretical guidance for developing highly sensitive and non-contact temperature probes , especially for the morphology-dependent temperature probes.
研究领域:
材料科学
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纳米技术
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温度传感
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光学性质
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Chen Zhi,Zhong Lijing,Sun Xiangyu,Fu Yihui,He Huilin,Ji Huijiao,Wang Yuying,Liu Xiaofeng,Xu Beibei,Wu Zhemin,Zou Chen,Ma Zhijun,Zhang Jingyu,Dong Guoping,Barillaro Giuseppe,Qiu Cheng-Wei,Qiu Jianbei,Qiu Jianrong
One of the major challenges in the rapidly advancing field of nanophotonics is creating high-aspect-ratio nanostructures over large-area with consistent precision. Traditional techniques like photolithography and etching fall short, being limited to fabricating structures with a typical feature size of 100 nm and a maximum aspect ratio of 30:1. To break through these barriers, herein we introduce a strategy, called wet-chemical etching assisted aberration-enhanced single-pulsed femtosecond laser-supplemented nanolithography (WEALTH), for manufacturing large-area deep holey nanostructures. This strategy enables fabrication of nanostructures with diameters as small as 25 nm (exceeding 1/30 of Abbe’s diffraction limit), aspect ratios greater than 10 4 :1, and large-area holey lattices spanning 10 mm 2 with potential scalability up to several cm 2 . We have successfully harnessed this technique to develop cutting-edge applications, including immunoassay biosensing chips, large-area nanophotonic crystals, nanophotonic crystal microcavities, and chiral nanophotonic devices. Moreover, it is adaptable to a wide range of materials, including crystals, glasses, and silicon-based semiconductors. Our approach offers high flexibility in customizing large-area holey nanophotonic structures, paving the way for breakthrough advancements in 3D integrated optics.
研究领域:
纳米光子学
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纳米光刻技术
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激光加工
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纳米结构制造
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光学工程
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yapeng Zhang,Hean Zhu,Zeqi Nie,Huihuang Yu,Wen Zhang,Wenkai Yan,Yige Xiong,Mengqi Tian,Haipeng Wang,Guanhua Zhang
Hybrid supercapacitors (HSCs) with facile integration and high process compatibility are considered ideal power sources for portable consumer electronics. However, as a crucial component for storing energy, traditional thin-film electrodes exhibit low energy density . Although increasing the thickness of thin films can enhance the energy density of the electrodes, it gives rise to issues such as poor mechanical stability and long electron/ion transport pathways. Constructing a stable three-dimensional (3D) ordered thick electrode is considered the key to addressing the aforementioned contradictions. In this work, a manufacturing process combining lithography and chemical deposition techniques is developed to produce large-area and high-aspect-ratio 3D nickel ordered cylindrical array (NiOCA) current collectors. Positive electrodes loaded with nickel–cobalt bimetallic hydroxide (NiOCA/NiCo-LDH) are constructed by electrodeposition , and HSCs are assembled with NiOCA/nitrogen-doped porous carbon (NiOCA/NPC) as negative electrodes. The HSCs exhibits 55% capacity retention with the current density ranging from 2 to 50 mA cm −2 . Moreover, it maintains 98.2% of the initial capacity after long-term cycling of 15,000 cycles at a current density of 10 mA cm −2 . The manufacturing process demonstrates customizability and favorable repeatability. It is anticipated to provide innovative concepts for the large-scale production of 3D microarray thick electrodes for high-performance energy storage system.
研究领域:
材料科学
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能源存储与转换
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JOURNAL OF NON-CRYSTALLINE SOLIDS
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2025
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IF 3.5
Tianfeng Yang,Dongxue Ren,Xiaping Zhu,Qing Li,Haiyan Li,Jia Chen,Hongyi Sun,Yonghua Sun
This study presents a method for the production of SiO 2 wires in a system composed of isopropanol, polyvinylpyrrolidone, ammonia and sodium citrate. The typical wires were mildly curved with an average diameter of 500 nm and an aspect ratio up to 60 or more. A 50-fold expansion of this process still gave stable wires with a yield of about 86 %. Monitoring the sodium levels along the SiO 2 wires revealed that sodium was present in different parts of the wires. Based on this phenomenon, we propose a growth mechanism for SiO 2 wires. The present system produces SiO 2 wires more stably and efficiently than the previously reported n-pentanol-PVP-ammonia-sodium citrate method, while significantly reducing both the amount of PVP and the preparation time.
研究领域:
材料科学
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纳米技术
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高影响因子
CARBOHYDRATE POLYMERS
·
2024
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IF 10.7
Dejian Zhang,Zhiqiang Fang,Shuiqing Hu,Xueqing Qiu
Cellulose nanofibril (CNF) films with both high strength and high toughness are attractive for applications in energy, packaging, and flexible electronics. However, simultaneously achieving these mechanical properties remains a significant challenge. Herein, a multiscale structural optimization strategy is proposed to prepare high aspect ratio CNFs with reduced crystallinity for strong and tough films. Carboxymethylation coupled with mild mechanical disintegration is employed to modulate the multiscale structure of CNFs. The as-prepared CNFs feature an aspect ratio of >800 and a crystallinity of <60 %. The film prepared using CNFs with a high aspect ratio (~1100) and reduced crystallinity (~54 %) exhibits a tensile strength of 229.9 ± 9.9 MPa and toughness of 22.2 ± 1.4 MJ/m 3 . The underlying mechanism for balancing these mechanical properties is unveiled. The high aspect ratio of the CNFs facilitates the transfer and distribution of local stress, thus endowing the corresponding film with high strength and toughness. Moreover, the low crystallinity of the CNFs permits the movement of the cellulose chains in the amorphous regions, thereby dissipating energy and finally increasing the film toughness. This work introduces an innovative and straightforward method for producing strong and tough CNF films, paving the way for their broader applications.
研究领域:
材料科学
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生物材料
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Materials Research Express
·
2018
·Vol. 5
·期 6
·066426
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IF 1.151
Tianrui Chen,Haifeng Wang,Hui Yang,Shengchi Bai,Xingzhong Guo
Silver nanowires (AgNWs) with high aspect ratio were rapidly synthesized by a mixed polyols process by adding diethylene glycol, triethylene glycol and glycerol into the ethylene glycol to construct the mixed polyols respectively, and the effects of type and volume fraction of mixed polyols on the morphology and aspect ratio of AgNWs were investigated in detail, and the optoelectrical properties of the corresponding transparent conductive electrodes were briefly introduced. The presence of mixed polyols can increase the viscosity of the solution, reduce the migration rate of Ag+ and nuclear in the solution, decrease the diameter of silver nanowires and heighten the length and aspect ratio. Appropriate mixed polyols (triethylene glycol) with the volume fraction of 30% allows the rapid synthesis of AgNWs with the diameter of about 64.2 nm, the length of 66.0 μm and the aspect ratio as high as 1029. The as-prepared AgNWs films possess a transmittance of 89.8% and a sheet resistance of 4.56 Ω/sq. The resultant AgNWs with high aspect ratio can be applied to prepare transparent conductive films.
研究领域:
材料科学
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纳米技术
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化学工程
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Journal of Materials Chemistry C
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2025
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IF 5.1
Yidan He,Yunliang Dai,Yuke Zheng,Xiaojuan Zhang
The exploration of high-performance wave absorbing materials is particularly critical for solving electromagnetic pollution. Based on the designability and structural virtue of one-dimensional anisotropic structure, a succession of MoO2/N-doped carbon (MoO2/NC) heterogeneous nanorods with various aspect ratios have been synthesized by hydrothermal, chemical oxidation polymerization and calcination process. To investigate the effect of aspect ratio on the microwave attenuation capacity, these fabricated nanorods are compounded with polyvinylidene fluoride (PVDF) under different filler contents. It is concluded that the aspect ratio can effectively regulate the microwave absorption performance. Specifically, the MoO2/NC-1/PVDF composites acquire the RLmin value of −56.9 dB at 2.9 mm and the RLmin value (−44.2 dB) of MoO2/NC-2/PVDF composites appear at a thinner thickness of 1.8 mm under a filler loading of 15 wt%. With the increment of aspect ratio, the optimal effective absorption bandwidth (EAB) of MoO2/NC-3/PVDF composites extend up to 6.32 GHz at 2.0 mm within a filler content of only 10 wt%, covering the whole Ku band. Meanwhile, the radar cross section simulations of MoO2/NC/PVDF composites further verify their immense potential in practical application. This work demonstrates that the aspect ratio design is conducive to acquisition for regulable and broadband microwave absorption under low filler loading.
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 41
·20356-20364
·
IF 9.931
Bing Xie,Yiwei Zhu,Mohsin Ali Marwat,Shujun Zhang,Ling Zhang,Haibo Zhang
Nanocomposites combining high aspect ratio nanowire fillers and a high breakdown strength polymer matrix have been actively studied for pulsed power capacitor applications. The relationship between the aspect ratio of nanowires and the dielectric constant of the composites, however, has not yet been established due to the lack of dielectric theory study, which impedes the research progress on nanowire/polymer composites for energy storage applications. In this work, a modified dielectric model based on Maxwell-Garnett approximation has been developed to quantitatively investigate the relationship between the aspect ratio of nanowires and the dielectric constant of the composites. Selecting SrTiO3 nanowires as the fillers, SrTiO3/P(VDF-CTFE) nanocomposite films were prepared using SrTiO3 nanowires with an optimized aspect ratio (∼100) by a high-speed stirring hydrothermal process. The experimental results confirm that the nanowires with the optimized aspect ratio enhance the dielectric constant and breakdown strength of the composite, thus greatly improving the energy storage performance. This work provides a universal computational approach for understanding the effect of the aspect ratio of 1D nanofillers on the composite properties, being beneficial to nanocomposite design for energy storage applications.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Droplet
·
2026
·Vol. 5
·期 1
·e70049
·
IF 9.1
Zebing Mao,Chao Luo,Yanhong Peng,Yang Li,Yile Chen,Sirui Pan,Junji Ohgi,Weidi Huang,Jianhua Zhang,Bing Xu
Miniaturized functional fluidic pumps have found broad applications across various fields; however, the fabrication and dimensional limitations of their electrodes remain a significant challenge. Conventional manufacturing techniques often fail to achieve high aspect ratio structures exceeding 2 and electrode heights greater than 1 mm. In this work, we propose a novel extreme microfabrication strategy that integrates flexible molding techniques with advanced microfabrication processes to develop high-precision pump electrodes. These electrodes are successfully implemented in droplet manipulation applications. First, we selected suitable microfabrication-compatible materials and developed a conductive, flexible liquid elastomer, along with a tailored fabrication process. Next, a functional working fluid compatible with the electrodes was synthesized and characterized in terms of its viscosity, electrical conductivity, dielectric constant, and interfacial behavior with aqueous phases. A corresponding microfluidic chip was also fabricated to assess its droplet generation performance. Both duty cycle-based and frequency-based droplet manipulation strategies were investigated using this chip. Finally, a machine learning approach was employed to model the droplet generation process and evaluate the influence of four key parameters on device performance. This study establishes a foundational platform and design pathway for future development of integrated on-chip pumping systems in microfluidic applications.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Wenlong Wang,Jianguo Song,Qi Zhang,Wenli Bi,Ruijing Li,Cheng Wang
Silver nanowires (AgNWs) are attractive one-dimensional nanomaterials for transparent electrodes, sensors, and optoelectronic devices. In this study, ultrathin AgNWs were synthesized through a facile low-temperature hydrothermal strategy using silver nitrate (AgNO3), cetyltrimethylammonium bromide (CTAB), and hexamethylenetetramine (HMTA) as raw materials. After systematic optimization, uniform AgNWs with an average diameter of 15 nm and a maximum aspect ratio of 2800 were successfully fabricated. AgBr colloids served as heterogeneous nucleation sites to form twinned seeds, and the coordinated reaction kinetics well balanced silver reduction and nanowire growth. The spray-coated AgNWs transparent conductive films on polyethylene terephthalate (PET) substrates exhibited outstanding optoelectronic performance with a sheet resistance of 45.1 Ω/sq, 92.1% transmittance, and a high FoM value. Moreover, reaction pressure and halide ion ratio were adjusted to regulate nanowire morphology. A pilot-scale synthesis was also completed, providing a reliable basis for the large-scale production and commercial application of AgNWs.
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