Energetic Materials Frontiers
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2021
·
IF 0
Rong-rong Yang,Chang-kun Song,Ya-jie Chen,Guo-wei Zeng,Jia-xin Wang,Jun-hong Chen,Wen-chao Zhang
The large energy release potential and highly adjustable combustion characteristics of nanostructured silicon compounded with sodium perchlorate (NaClO 4 ) make it one of the most attractive inorganic energetic materials. Compared with nanoporous silicon, the silicon nanowires prepared by metal-assisted chemical etching are easily loaded with NaClO 4 to obtain energetic materials, due to their one-dimensional array structure and tight contact with the silicon substrate. However, the high hygroscopicity of NaClO 4 greatly degrades the long-term storage property of the material, and must be addressed. In this study, sulfur, as a known stable and non-hygroscopic oxidant that reacts with nanostructured silicon, was impregnated on the silicon nanowires/NaClO 4 energetic material to insulate NaClO 4 from H 2 O in the ambient air. After sulfur impregnation, the mass of the sample increased by 8.7 mg after being exposed to 98% relative humidity at 25 °C for 12 h, while the sample without sulfur increased by 50 mg, indicating significant improvement in the hygrophobicity of the sulfur-containing energetic material. Laser ignition experiments showed that the combustion performance was only slightly affected after sulfur treatment. This work provides a new strategy for improving the hygrophobicity of silicon-based energetic materials, which can improve their applicability in micro-electromechanical systems.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Shiwei Xu,Guofeng Wang,Yueyue Feng,Liying Huang,Zhongyu Yang,Yu Zhang,Jiacheng Dong,Yajun Wang,Nannan Liu
Gastric cancer (GC) is one of the leading causes of cancer-related mortality worldwide. miRNA-106a is a small non-coding RNA that is significantly up-regulated in GC cells. CD44 protein serves as a cell adhesion molecule in GC, and its high expression is associated with tumor invasiveness and metastatic potential. Detection of these two biomarkers for GC can significantly improve the sensitivity and specificity of tests, thus identifying patients more accurately and facilitating early diagnosis and intervention. In this study, we proposed a bottom-up assembly method of silica nanowires (SiNWs) modified glass microtube to construct a glass microsensor based on the functionalization of SiNWs-dual probes (SiNWs@DGM), which can be used for the simultaneous detection of the two gastric cancer markers mentioned above in a highly sensitive and specific manner. The detection limit of the sensor is as low as 1 aM for the target miRNA-106a and 1 pg/mL for CD44 protein. The constructed SiNWs@DGM demonstrates excellent selectivity, high anti-interference ability, specificity, and good storage stability in sample analysis without any amplification. Therefore, our biosensing strategy can reduce false positive and false negative results, providing more reliable support for gastric cancer management and ultimately improving patient prognosis and survival rates.
研究领域:
生物医学工程
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分子诊断学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 32
·4740-4746
·
IF 3.382
Jingbo He,Bo Sun,Yong Sun,Chengxin Wang
Although more than 250 polytypes of silicon carbide (SiC) crystals have been discovered, only very limited types of nanowires can be synthesized in a controllable manner. Both experimental and theoretical investigation reveal that 3C-SiC is the most stable form, which is the primary product of nanowires synthesized via various methods in thousands of reports. Although hexagonal phases, particularly the wurtzite structure with a bandgap of 3.33 eV is promising in optoelectronic applications, the fabrication of nanowires with theses phases is still rare. Herein, in this study, by precisely regulating the atmospheric conditions, we revealed that the CH4 supply resulted in the phase-selective growth between 3C- and 2H-SiC nanowires. As the CH4 flow rate increased, it was possible to fabricate 3C-SiC, hybrid 3C-/2H-SiC and 2H-SiC nanowires in a controllable manner. The possible mechanism is demonstrated accordingly. We believe this progress benefits the structural design and optoelectronic application of SiC nanowires.
研究领域:
材料科学
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纳米技术
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半导体物理
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光电材料
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晶体生长
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
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IF 5.091
Kui Yin,Yafei Cheng,Binbin Jiang,Fan Liao,Mingwang Shao
Pd nanoparticles grown in-situ on the surface of silicon nanowires (Pd-SiNW nanocomposites) were employed as electrocatalysts in hydrogen evolution reaction and exhibited satisfactory catalytic performance. Here, SiNWs served as the carrier with vast surface area. It is interesting to note that Pd-SiNW nanocomposites were more stable for hydrogen evolution reaction than the commercial Pt/C catalysts, which might be attributed to the three-dimensional crisscrossing structure of the composites and the strong interaction between Pd and Si. The strong interaction is due to the low lattice mismatch in the epitaxial growth of Pd particles on the surface of Si. Such special structure and interaction help to tightly hold Pd nanoparticles, which could avoid the loss of catalysts and keep the catalyst from being agglomerated and growing large.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2021
·Vol. 31
·期 11
·4260-4271
·
IF 3.543
Zhang Xuan,Wang Tongfei,Li Songjun,Shen Xiaojuan
Abstract In this article, a novel silicon-based electrode was designed with the facile solution methods. With the modification of highly conductive PEDOT:PSS layer on the SiNWs by the spin-coated method (SiNWs-PSS), three-dimensional (3D) porous network polyaniline nanofibers (PANI) film was uniformly electrodeposited on the silicon surface (SiNWs-PSS@PANI). The sheet resistances of the PEDOT:PSS layer with different surfactants as well as the deposition time of the PANI were investigated. After optimization, the fabricated SiNWs-PSS@PANI electrode displayed high capacitance about 301.71 mF cm −2 at the current density of 1 mA cm −2 , which enhanced ~ 29 fold comparing to 10.18 mF cm −2 of electrode without the PEDOT:PSS layer between the SiNWs and PANI (SiNWs@PANI), outperforming most values of the reported silicon-based electrodes. The electrode designed in this paper provides a new idea to fabricate high-performance of silicon-based micro-supercapacitors with the simple and low-temperature method. Graphic Abstract
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Liang Chen,Wei Tian,Chaoxiang Sun,Fengren Cao,Liang Li
To meet the demands of next-generation optoelectronic circuits, the design and construction of photodetectors with a tunable photoresponse range and self-powered feature are urgently required. To achieve selective wavelength detection, a band-pass filter is usually required to dislodge the interference of a certain wavelength light, which inevitably enhances the weight and increases the cost. Here, we demonstrate a self-powered photodetector with a tunable response range by constructing a heterojunction structure consisting of poly(3-hexylthiophene) (P3HT), a TiO2 interlayer, and silicon nanowires. By controlling the P3HT concentration, both core–shell and embedded configurations can be obtained, which exhibit different response ranges. This work provides a convenient route to construct self-powered wavelength-selective photodetectors, which may find applications in light communication and biomedical engineering.
研究领域:
材料科学
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光电工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 16
·6114-6124
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IF 6.482
Xiaojuan Shen,Xuan Zhang,Tongfei Wang,Songjun Li,Zhaoqiang Li
In this study, a novel 3D porous Si-based supercapacitor electrode was developed using a simple solution method, which involved first the in situ polymerization of polyaniline particles (PANI) on Si nanowire arrays (SiNWs), followed by the further electrodeposition of a polyaniline nanofiber (PANF) film. Highly doped PEDOT:PSS layers were introduced before and after PANF deposition, serving as the built-in 3D current collector of the electrode. To improve the capacity of the electrode, the PANF film was incorporated with graphene and the PEDOT:PSS layer was doped with chloroplatinic acid (H2PtCl6). Due to the smart design, SiNWs only acted as a scaffold, thus the electrodes could be fabricated on any Si-based wafer commonly used in micro-electronic devices regardless of its purity, conductivity and surface passivation. Here, the Si-based supercapacitor electrode was first fabricated on a solar-grade (SG) Si wafer, which exhibited a high areal capacitance of 718.85 mF cm−2 at 1 mA cm−2. Additionally, an aqueous asymmetric supercapacitor was assembled by using the resultant polymer-coated SiNWs on the SG wafer as the positive electrode, and the activated carbon (AC) as the negative electrode, which exhibited an energy density of 0.194 mW h cm−2 at a power density of 0.85 mW cm−2. Both of them outperform the reported values of most of the electronic-grade (EG) Si-based electrodes and supercapacitors. This work not only paves a promising way for the design of a 3D electrode, but also opens up a new opportunity to develop low-cost and high-performance Si-based supercapacitors.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shaolong Wu,Liujing Li,Linling Qin,Zhongyuan Zhou
Si-based heterojunctions have been intensively employed to reduce the large overpotential of Si single-absorber photoelectrodes in the field of photoelectrochemical (PEC) water splitting, but achievement of high-quality heterojunctions with an appropriate bandgap on the Si nanostructure host remains a great challenge. Herein, the p-Si/n-CdS core/shell nanowire heterojunction photocathode has been achieved by a combination of nanosphere lithography, metal-assisted chemical etching, atomic layer deposition , and chemical bath deposition. Compared to the bare Si nanowire photocathode , the overpotential maintaining a photocurrent density of 10 mA cm −2 for the optimized p-Si/n-CdS core/shell nanowire heterojunction photocathode under AM 1.5G illumination is reduced by 0.93 V, and simultaneously the saturated photocurrent density is increased by 4.4 mA cm −2 . Analyses indicate that the introduced CdS shell can greatly facilitate the separation and transfer of the photogenerated carriers , as well as partly enhancing the optical absorption .
研究领域:
材料科学
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光化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Haizhi Yu,Shan Liu,Zhiyong Mao
Pore-structure-tailorable composites were constructed by alumina platelets' interlocking matrices and self-assembled SiC nanowire aerogels. The nanowires grew in the unidirectional pores of the matrices with the silica-based xerogel that filled in the pores or covered on the platelets as nucleation base. Nanowire aerogels as secondary structure built by curly or long/straight nanowires formed with changing the Si/C mole ratio (1/3∼1/12) and sintering temperature (1300–1500 °C). The tested composites had relatively close bulk densities, porosities and pore volumes of 0.66–0.76 g/cm 3 , 81.6–77.8 % and 1.04–1.25 mL/g respectively. The specific surface areas of the composites with regulable pore size distributions were tailored in the range of 2.43–9.05 m 2 /g. The nanowires acted as “lotus root silk”-like adhesion structure during/after the compression to restrain the catastrophic damage of the material. The synthesized composites with adjustable pore-structure and remarkable using reliability were suitable for hot gas filtration, catalyst supporting, or dye/oil adsorption in waste water, etc.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Qiyue Zhou,Ming Bao,Xiuyuan Ni
In this article, we synthesized a ternary silicon nanowire arrays (SiNWs)-based composite electrode by a novel wet-chemical technique for the application in high-performance supercapacitors . Initially, the polydopamine (PDOP) was loaded as the modifier to enhance the surface hydrophilicity properties of the SiNWs. Meanwhile, PDOP serves as the nitrogen-doped carbon source. Subsequently, the conformal PDOP layer was used as the template to guide the preferential deposition of the nickel oxide (NiO) precursor. Finally, the SiNWs/NC@NiO composite electrode was obtained by a one-step calcination process. The existence of the N-doped carbon was characterized by the XPS and element analysis characterizations. The FE-SEM characterizations revealed the formation processes of NiO nanoflakes precursor on PDOP layer. The N-doped carbon and nickel oxide play a synergistic role in enhancing the electrochemical performance in aqueous electrolytes. The as-prepared SiNWs/NC@NiO composite electrode shows an areal specific capacitance as high as 110 mF/cm 2 at the current density of 1.0 mA/cm 2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-9
·
IF 3.159
Song Longfei,Luo Linqu,Xi Yan,Song Jianjun,Wang Ying,Yang Liping,Wang Anqi,Chen Yunfa,Han Ning,Wang Fengyun
Although significant developments have been made in the low-concentration formaldehyde monitoring in indoor air by using gas sensors, they still suffer from insufficient performance for achieving ppb-level detection. In this work, <100> oriented Si nanowires (SiNWs) with high specific surface area were prepared via metal-assisted chemical etching method (MACE), and then were uniformly coated with graphene oxide (GO) followed by the subsequent reductive process in H 2 /Ar atmosphere at 800 °C to obtain reduced graphene oxide (RGO). The RGO coating (RGO@n-SiNWs) obviously enhances SiNWs sensitivity to low-concentration formaldehyde, benefiting from the increased specific surface area, the sensitization effect of RGO, and the formation of p-n junction between SiNWs and RGO. Specifically, RGO@n-SiNWs exhibits a high response of 6.4 to 10 ppm formaldehyde at 300 °C, which is about 2.6 times higher than that of pristine SiNWs (~ 2.5). Furthermore, the RGO@n-SiNWs show a high response of 2.4 to 0.1 ppm formaldehyde which is the largest permissive concentration in indoor air, a low detection limit of 35 ppb obtained by non-linear fitting, and fast response/recovery times of 30 and 10 s. In the meanwhile, the sensor also shows high selectivity over other typical interfering gases such as ethanol, acetone, ammonia, methanol, xylene, and toluene, and shows a high stability over a measurement period of 6 days. These results enable the highly sensitive, selective, and stable detection of low-concentration formaldehyde to guarantee safety of indoor environment.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Hui Jiang,Pengchun Lan,Kaiyu Zhao,Lili Yu,Lichao Zhou,Yajun Wang,Chao Deng
Oil spills present significant environmental challenges due to high remediation costs and secondary pollution. Inspired by the lotus leaf microstructure, a novel SiO 2 NWs@PU composite was developed by modifying polyurethane (PU) sponges with hydrophobic alkyl groups-capped silica nanowires (SiO 2 NWs). This design synergistically optimizes surface energy and roughness by tailoring the alkyl chain length and aspect ratio of SiO 2 NWs, achieving excellent oil-water separation. The composite achieves a low surface energy of 0.73 ± 0.05 mJ/m² and a water contact angle of 154.4°, maintaining superhydrophobicity (>151°) under harsh conditions, including pH 3–11, boiling water, and baking at 150 °C. It also exhibits robust mechanical properties, with a 4.6-fold increase in compressive strength over pure PU and minimal degradation (<15 %) after 100 compression cycles. SiO 2 NWs@PU achieves oil adsorption capacities of 21–49 g/g, with over 95 % separation efficiency under simulated turbulent marine conditions. Versatility of this strategy is demonstrated through substituting PU with melamine sponge, resulting a SiO 2 NWs@ melamine composite with outstanding oil adsorption capacities of 72–163 g/g. With excellent resilience, flame retardancy, and reusability, these scalable and cost-effective composite sponges provide a sustainable solution for oil spill remediation and oily wastewater treatment, addressing critical environmental needs.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 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）