APPLIED OPTICS
·
2021
·Vol. 60
·期 28
·8896-8903
·
IF 1.98
Li Ren,Kunpeng Gao,Qiuhong Tan,Qiuhong Tan,Qiuhong Tan,Chen Qing,Qianjin Wang,Qianjin Wang,Peizhi Yang,Yingkai Liu,Yingkai Liu
All inorganic perovskite materials have drawn extensive attention, owing to their outstanding performance, facile solution-processed method, and potential applications in optoelectronic devices. However, uncontrollable morphology, high defect density, and instability of perovskites prepared via solution-processed method are the main challenges for their large-scale production and commercialization. Herein, we prepared large-scale ${\rm{CsPbB}}{{\rm{r}}_3}$ microwire arrays with highly ordered morphology and high crystalline quality by a template-assisted method. The photodetectors based on ${\rm{CsPbB}}{{\rm{r}}_3}$ microwire arrays exhibited remarkable on/off photocurrent ratio of ${9.02} \times {{1}}{{{0}}^3}$, high detectivity of ${1.59} \times {{1}}{{{0}}^{13}}$ Jones, high responsivity of 4.55 A/W, and fast response speed of 4.9/3 ms. More importantly, the photocurrent of the photodetectors hardly changed in air after being stored for two months, indicating remarkable stability. This study demonstrates that ${\rm{CsPbB}}{{\rm{r}}_3}$ microwire arrays provide the possibility for preparing large-scale and high-performance optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 22
·3271-3277
·
IF 3.1
Yudan Chen,Wenjun Huang,Xiangfeng Wei,Panpan Li,Zain Fatima,Rulong Zhou,Jiehua Liu
It is a challenge to synthesize high-quality MAPbX3 single-crystal microwires (MWs) under gentle conditions owing to their sensitivity to humidity and brittleness. We herein propose a facile bilayer flexible polymer confinement method to obtain high-quality MAPbI3 single-crystal microwires in air. The MAPbI3 microwire-based photodetector exhibits a superior responsivity of 77.96 A W−1, an EQE of 1.86 × 104%, and an ultrahigh detectivity of 6.97 × 1013 Jones owing to the efficient carrier transport and excellent crystallinity with few defects. Furthermore, photodetectors based on the MAPbI3 microwire arrays present superior performance with a detectivity of 3.09 × 1013 Jones, which is more than 160% and 7700% higher than that of the photodetectors based on the MAPbI3 microwires and polycrystalline film at 254 μW cm−2.
研究领域:
材料科学
·
光电材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Nanophotonics
·
2023
·
IF 1.5
Ziheng Wang,Xueying Chu,Jinhua Li,Dengkui Wang
Detectors with cost-effective, polarization-sensitive, and integrative functionalities are required for next-generation ultraviolet (UV) detection systems. Low-dimensional semiconductor materials have potential for optical device applications, especially polarization detection, because of their excellent polarization characteristics. Therefore, ultralong ZnO microwires, ∼0.5 to 1 cm long, were prepared using the chemical vapor-phase epitaxy method, making it easy to build photoelectric devices. The emission polarization of the ZnO microwires excited by circularly polarized light was ∼0.60, indicating a high-anisotropy optical property. Their UV-polarization spectrum and photoelectric detection were determined. When the ZnO microwire was excited by linearly polarized UV light, the intensity of photoluminescence (PL) changed periodically with the polarization direction of the UV light. The PL polarization of the ZnO microwire for linear UV detection was ∼0.12. For a ZnO microwires photoelectric device, the photocurrent anisotropy ratio reached 1.28 when the polarization angle of the incident UV light changed. These results suggest that the obtained ultralong ZnO microwires have the potential for application in future UV-polarization detection systems.
研究领域:
材料科学
·
光学工程
·
半导体器件
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Ziwei Liu,Jianzheng Li,Yapeng Fu,Sijia Yu,Wenjun Li,Yiqing Yang,Jiajia Wang,Sihui Yu,Peiwen Yu,Kailiang Xu,Yajie Qin,Songlin Zhang,Huisheng Peng,Xuemei Sun
The brain undergoes constant dynamic deformations, which are intricately linked to its intrinsic properties and pathological states. However, continuous monitoring of these deformations presents significant challenges due to the limited temporal and spatial resolutions of conventional imaging techniques. Here, it is developed an implantable deformation array sensor capable of real-time, continuous monitoring and mapping of brain deformations. The sensor features microcoil arrays embedded in ultrathin films and operates based on the principle of mutual inductance, achieving exceptional temporal resolution (<100 µs) and distance resolution (<5 µm). It is implanted the sensor between the skull and the cortex and successfully tracked continuous brain deformations across four cortical sites in rat models. These experiments are conducted under scenarios of isoflurane inhalation, mechanical impacts, and intracranial hemorrhage, where such detailed monitoring and mapping has not been achieved previously. The results reveal that brain deformations dynamically vary over time in response to both physiological fluctuations and pathological events, with deformation amplitudes decreasing as the distance from the primary site increases. This innovative approach provides a novel platform for exploring brain dynamics and their associations with neurological disorders and disease progression.
研究领域:
神经科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2025
·
IF 9.6
Baodi Yin,Yiwen Dong,Huan Cheng,Lifeng Xiong,Yang Liu,Yinyan Zhang,Zhucheng Liu,Rui Chen,Peng Gao,Zijian Zheng,Mingliang Yu,Zhennan Deng,Lei Lu,Jinsong Liu,Cuie Wen
Titanium dioxide nanotube arrays (TNTs) generated in situ on the surface of dental implants have been shown to enhance bone integration for load-bearing support while managing load distribution and energy dissipation to prevent bone resorption from overload. However, their inadequate stability limits the clinical use of conventional TNTs. This study introduces an innovative approach to improve the mechanical stability of TNTs while maintaining their bone-integration efficiency. The method involved creating microline patterns on TNTs (L-TNTs), where the TNTs were embedded within grooves for enhanced protection. This was achieved through a combination of laser lithography–assisted microline patterning and anodization. Incorporation of microline patterns significantly increased the mechanical stability of the TNTs. This improvement was evidenced by multiple tests: peeling tests demonstrated the maximum adhesive strength of the l-TNTs increased by at least 50 %; friction-wear tests revealed narrower, shallower abrasion patterns and lower average friction coefficients; and ex vivo screw implant insertion and removal tests showed post-insertion, the nanotube structures in the TNTs peeled, whereas those in the l-TNTs remained intact. The l-TNTs also maintained their efficacy in promoting bone integration both in vitro and in vivo , establishing a robust platform for multifunctional implant investigation and advancing the practical application of TNTs. Statement of significance This study presents a novel laser lithography–assisted micropatterning and anodization method for creating micro-lined titanium dioxide nanotube arrays (L-TNTs) on dental implants. Compared to conventional TNTs, l-TNTs enhanced adhesive strength and wear resistance while maintaining efficacy in promoting bone integration. This method enhances the mechanical stability of TNTs, facilitating its practical application in multifunctional dental implants.
研究领域:
生物医学工程
·
材料科学
·
牙科植入物研究
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ping Zhou,Wenxuan Fu,Lurong Ding,Yajuan Yan,Weiliang Guo,Bin Su
Electrochemiluminescence (ECL) generation by tris(2,2’-bipyridyl)ruthenium (Ru(bpy) 3 2+ ) and S 2 O 8 2− is one of most frequently studied cathodic systems. However, the reaction mechanism is yet to be fully resolved, since the reaction involving highly reactive intermediates occurs at the negative potential limit of aqueous solutions. In this work we used bismuth microwire (BiMW) as the working electrode and ECL microscopy (ECLM) as the imaging tool to study the mechanism of cathodic ECL generation by Ru(bpy) 3 2+ /S 2 O 8 2− . Thanks to its high hydrogen evolution overpotential, BiMW electrode could provide us with a wide negative potential window in aqueous solutions. While ECLM allowed us to determine the thickness of ECL layer (TEL), which was found to vary from ca. 3.4 μm to 3.0 μm with increasing the concentration of S 2 O 8 2− . Given the chemical reduction of S 2 O 8 2− by Ru(bpy) 3 + is essential for extending the concentration profile of SO 4 •− , the slightly changed TEL is likely related to the instability of Ru(bpy) 3 + in aqueous solutions. Finally, no ECL was detected for Ru(bpy) 3 2+ -labelled microbeads, implying that S 2 O 8 2− could not work as the cathodic coreactant like tri- n -propylamine (TPrA) as the anodic one in bead-based immunoassays .
研究领域:
分析化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2022
·Vol. 65
·期 11
·3105-3114
·
IF 8.64
Li Shun-Xin,An Yang,Sun Xiang-Chao,Zhu He,Xia Hong,Sun Hong-Bo
Organic semiconductors with excellent optoelectronic properties are important building blocks for high-performance organic devices. Patterning organic crystals with high precision and accurately positioning them at the target position are major challenges for integrated devices. However, uncontrollable dewetting of the conventional solution method leads to as-prepared micro-nanocrystals with high defect-state density, low crystalline quality, and disordered distribution, which impair the uniformity of the device performance and limit integration. By regulating the solution position with a template and guiding the solution flow direction under gravity, aligned organic microwire arrays and polygonal patterns were fabricated. The polarization-sensitive photodetector exhibited responsivity up to 1234 A W −1 , linear dynamic range of 148 dB, I photo / I dark of 10 4 , response time as low as 1.1 ms, and dichroic ratio up to 2.1. Given the homogeneity of microwire arrays, the device-to-device variation was reduced to 3.58%, resulting in high-quality imaging. This study provides new insights into organic micro/nanocrystal patterning and device integration.
研究领域:
材料科学
·
光电设备
·
半导体技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 45
·23200-23205
·
IF 6.895
Shuyu Liang,Yunzhi Dai,Gong Wang,Hong Xia,Jihong Zhao
Flexible ultraviolet (UV) photodetectors (PDs) have gained increasing demand because of their widespread applications in wearable devices. However, difficulties associated with complicated fabrication technologies significantly limit their scope of application. Herein, via the development of a femtosecond laser direct writing (FsLDW) strategy, silicon carbide (SiC) nanoparticles are found to be assembled in a single microwire within 30 s. The surface of the deposited SiC microwire presents a three-dimensional porous structure, which is conducive to improving the responsivity of the device. The responsivity of a SiC-based microwire PD to UV light at 365 nm is found to be 55.89 A W−1 at a 1 V bias. The as-fabricated SiC microwire PDs on a glass substrate exhibit thermal stability at 350 °C, and the response speed of the PDs becomes notably faster at high temperatures, suggesting their promising applications in harsh conditions. Due to the low-temperature processing characteristics of this process, they can be prepared not only on glass substrates, but also on thermosensitive polymer substrates without an extra transfer process. Moreover, the SiC microwires prepared via FsLDW are directly deposited on the flexible substrate, and the prepared flexible SiC-based PDs can still work stably after being bent 2000 times. This research unveils a feasible way to fabricate a PD with excellent thermal stability and mechanical flexibility.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Lin Zhang,Bo-Wen Liu,Yu-Zhong Wang,Teng Fu,Hai-Bo Zhao
With the rapid development of 5G technology, functional coatings with both high-efficiency flame retardancy and electromagnetic interference shielding (EMI) are urgently needed, while traditional inefficient methods have encountered bottlenecks. Herein, we demonstrate an eco-friendly and multifunctional nano/micro coating constructed by biomass phytic acid (PA) induced polymerization and self-assembly of polyaniline (PANI) nanoparticles and dip-coating of silver microwires (AgMWs). In this design, PA with high flame-retardant efficiency is smartly doped into PANI to achieve P-N synergistic flame retardancy and improve electrical conductivity of PANI simultaneously. Consequently, under the coaction of AgMWs, P-doped PANI nanoparticles, as well as unique continuous micro-nano structures, the nano/micro coating can endow commercial polyurethane (PU) foams with outstanding EMI shielding performance (∼51 dB in X-band). Meanwhile, the coated PU foam exhibits high flame retardancy due to the P-N synergistic effect of PA/PANI, which self-extinguishes immediately after ignition during the UL-94 vertical burning test, shows a high limiting oxygen index (LOI) value of 34.8%, and exhibits a 50.7% lower peak heat release rate compared with pure PU foam. Further, the functional nano/micro coating with three-dimensional and highly porous structure makes the foam thermally insulating and infrared stealthing. The eco-friendliness and simplicity of this method and its successful application in commercial PU foam make it potentially applicable for the preparation of various kinds of multifunctional EMI shielding materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2023
·Vol. 10
·期 20
·2300252
·
IF 5.4
Lingyun Xu,Zhihao Zhao,Yinghao Ge,Zhixin Wang,Xiaohan Sun,Xiangyu Jiang
Assembling functional materials into one-dimensional arrays is an efficient method for the integration of devices. However, the complicated assembly methods and poor stability of patterns still restrict their further applications. In this work, the well-dispersible nanosheets are prepared by introducing a bionic adhesive strategy. The oriented arrays with uniform morphology and precise position are realized by the liquid-film-induced capillary bridge assembly method. Owing to the abundant interactions between catechol structure and targeted substrates, the micro-wires present extraordinary stability in adhesion tests. Field-effect transistors (FETs) based on these micro-wires are also fabricated, and enhanced carrier mobility is achieved, exhibiting to be 41 times higher than pristine film-structured FETs. Micro-wires have a certain stability and improved electrical properties at the same time, which endows this strategy with practicality and application prospect.
研究领域:
材料科学
·
生物仿生学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 19
·6327-6335
·
IF 6.4
Zeyao Han,Yang Liu,Yousheng Zou,Junyu Li,Yin He,Haibo Zeng
One dimensional (1D) halide perovskites (HPs) have achieved tremendous progress in light emitting diodes, lasers, and photodetectors for their splendid optical properties, high mobility, and long diffusion length. However, unsatisfactory stability caused by inherent surface defects and notorious ion migration hinder their further development for commercial and practical applications. Herein, with the assistance of organic halide salts (phenyl-ethylammonium bromide (PEABr) and butylamine bromide (BABr)), we demonstrate a simple solution method for passivating the surface defects of the MAPbBr3 microwire. Owing to the coordination bonding between amino groups and Pb2+, the PEA or BA molecules spontaneously assemble onto the surface of the as-fabricated microwire, leading to an obvious enhancement of the photoluminescence (PL) intensity and an extended PL lifetime. Meanwhile, negligible hysteresis was observed due to the suppressed ion migration. As a consequence, the constructed passivated microwire-based photodetector exhibits an increased responsivity of 35 mA W−1, along with a −3 dB width of 740 Hz, a moderate LDR of 80 dB, and a weak noise current of 2.3 × 10−13 A × Hz−0.5. Moreover, the device exhibits an enhanced stability for over 21 days under a humidity of 50%. This work provides an effective strategy to endow 1D perovskites with improved performance and stability for further applications in the future.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Ziming Shen,Jiachun Feng
Pre-constructing vertically aligned 3D thermally conductive fillers networks via unidirectional freeze casting method to prepare polymer composites with high through-plane thermal conductivity (TC) has recently attracted much attention. Here we proposed a strategy to fabricate anisotropic silicon carbide microwires (SiCMWs) networks in a uniform cold environment. The key point of our strategy was to design and make the anisotropic molds composed of materials with very different TC. We used a cuboid mold made of alumina sheets as top and bottom and PVC foam plates as side surfaces to fabricate vertically aligned SiCMWs networks in a cryogenic refrigerator. After impregnating of the networks into epoxy matrix , the obtained composites exhibited significant TC enhancement at an ultralow loading. The composite containing only 1.32 vol % of SiCMWs had a TC value of 0.62 W/(m K), which was 3.9 and 2.3 times that of pure epoxy and epoxy composite with random SiCMWs, respectively. Moreover, utilizing our method, the 3D networks with different orientation direction, dimensions or shapes could be also easily prepared only by designing and utilizing different molds.
研究领域:
材料科学
·
热传导研究
✓ 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）