APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Li Liu,Tao Chen,Liping Han,Zhuo Qian,Junpeng Li,Guoyou Gan
The Thermal Conductive Silver Adhesive (TCSA) efficiently transfers heat from electronic components to heat dissipation components, preventing overheating and extending device lifespan. Despite the effectiveness of commercial sintered nano TCSA, high production costs necessitate a more affordable, high-performance preparation method. This study presents a strategy for preparing ultra-high thermal conductivity (TC) TCSA using multidimensional thermal conductive fillers and low-temperature sintering of silver nanoparticles (AgNPs). MXene@AgNPs particles are synthesized via in-situ reduction of AgNPs on MXene surfaces. These particles, combined with silver microflakes (AgMFs) as primary fillers and epoxy (EP), undergo low-temperature heat treatment to form the AgMFs-MXene@AgNPs/EP composite. Characterization and computational models show that filler-filler interface thermal resistance (ITR f-f ) is critical for TC. Adding MXene alone is insufficient, but using MXene@AgNPs particles as secondary fillers allows AgNPs to interconnect fillers, effectively reducing the ITR f-f . The resulting composite achieves an ultra-high TC of 65.51 Wm −1 K −1 with 63 wt% total filler content (60 wt% AgMFs, 3 wt% MXene@AgNPs). This study advances the development of low-cost, high-performance TCSA for thermal management applications.
研究领域:
材料科学
·
热传导工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 6
·5526-5535
·
IF 2.195
Yang Fan,Hu Bo,Peng Ye,Hang Chunjin,Chen Hongtao,Lee Changwoo,Wei Jun,Li Mingyu
A silver (Ag) composite paste was fabricated based on Ag nanoparticles (NPs) and Ag microflakes (MFs). Robust interconnections were achieved after sintering in the temperature range of 150–225 °C. The shear strengths of the Ag MF + NP joints before and after thermal shock from − 50 to 150 °C for 1000 cycles were 155.7 ± 14.5 MPa and 78.4 ± 20.8 Mpa, respectively. The results show that the Ag composite paste not only has similar sintering properties to the Ag NP pastes but also exhibited superior mechanical reliability due to the addition of the Ag MFs. In addition, the sintered properties of different Ag pastes were discussed in terms of the coating organics, thermal behaviour and microstructure. The fracture modes after the shearing tests were analysed in detail. The Ag composite paste provides a potential solution for high-temperature applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CHEMPHYSCHEM
·
2020
·Vol. 21
·期 5
·397-405
·
IF 3.144
Feiyu Zhao,Xue Luo,Lixiang Liu,Jianhang Lv,Xianping Fan,Xvsheng Qiao,Yang Xu,Lorenz Kienle,Xianghua Zhang,Guodong Qian
Graphical Improved responsivity : GeSe micro-sheets and micro-belts were synthesized by a chemical orientation growth method in 1-octadecene solvent and oleic acid solvent, respectively. The photodetectors based on single micro-belt showed a broadband spectral photoresponse with high responsivity (5562 A/W) and detectivity (3.01×10 12 Jones). It demonstrates significant application potential in the visible and NIR photodetection. GeSe micro-sheets and micro-belts have been synthesized by a facile one-pot wet chemical method in 1-octadecene solvent and oleic acid solvent, respectively. The adsorption of more oleic acid molecules on the (002) plane promoted growth along [010] direction of the GeSe micro-belts and limited carrier transport in this direction, resulting in higher carrier concentration and mobility of the GeSe micro-belts. The performance of the photodetectors based on the single GeSe micro-sheet and the single GeSe micro-belt was investigated under illumination at 532 nm, 980 nm and 1319 nm. Both, photodetectors based on a single GeSe micro-sheet and a single GeSe micro-belt, exhibit a high photoresponse, short response/recovery times, and long-term durability. Moreover, the photodetector based on a single GeSe micro-belt displays a broadband response with a high responsivity (5562 A/W at 532 nm, 1546 A/W at 980 nm) and detectivity (3.01×10 12 Jones at 532 nm, 8.38×10 11 Jones at 980 nm). These excellent characteristics render single GeSe micro-belts very interesting for use as highly efficient photodetectors, especially in the NIR region.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mengke Guo,Yanshu Shi,Xuekun Wang,Yiqian Wang,Jile Wang,Xiaoyun Qin,Tingting Guo
Different structures and morphologies of organic materials exhibited distinct optoelectronic properties, making it crucial to optimize the structure and morphology of these materials for achieving high-performance optoelectronic devices. Here, a simple physical vapor deposition method was successfully employed to fabricate uniformly-sized sheet-like lead phthalocyanine (PbPc) in two different scales (micron and nano). Both types of PbPc underwent changes in crystal structure, containing multiple components that affected optoelectronic performance. Subsequent optoelectronic tests revealed that PbPc nanosheets and microsheets each demonstrated unique advantages. PbPc nanosheets exhibited the highest responsivity, reaching 7.91 × 10 2 times that of the raw materials at a 0.5 V bias. Conversely, the responsivity of PbPc microsheets increased to 20.4 times that of the raw materials, accompanied by a rise time of 153.84 ms and a fall time of 246.75 ms, demonstrating rapid response capabilities. This paper significantly enhances the diverse optoelectronic properties of PbPc through a simple approach, providing a new strategy for developing high-responsivity organic photodetectors and fast-response organic photodetectors.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 24
·21343-21354
·
IF 2.195
Zhan Haijiao,Guo Jiayu,Yang Xiazhen,Guo Bing,Liu Wei,Shen Hangyan,Wang Xiaorong,Tang Weigang,Chen Fei
There is a growing demand for silver pastes and inks used in the field of printed electronics. The synthesis of organic surfactant stabilized silver micro-flakes by the solution-phase chemical reduction method at room temperature has attracted wide attention due to its simple equipment, convenient operation and affordable price. However, the electrical conductivity of silver micro-flakes-filled conductive pastes and inks are significantly influenced by residual surfactants. Therefore, the surface modification of silver micro-flakes to remove surface adsorbents becomes a key issue. In this study, the silver frameworks based on the self-sintering silver micro-flakes at room temperature are developed for silver pastes with excellent conductivity. The silver paste with 48 wt% of the sodium nitrate and succinic acid treated silver powders has a resistivity of 1.08 × 10 −6 Ω m and excellent adhesion strength after being cured at 140 °C in an oven.
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
Journal of Energy Storage
·
2024
·
IF 8.9
Jiafeng Zhai,Qingfeng Zhang,Ying Yang,Zhihao Wang,Xuan Tang,Shuhong Xie
The development of high-performance potassium-ion batteries (PIBs) necessitates the research of anodes with high capacity, long cycle life, and excellent rate performance. In this study, we drew inspiration from the structure of diatoms in nature. Through a simple self-template pyrolysis process , Se and S were doped into carbon matrix, leading to the synthesis of Se/S-doped diatomite-like carbon microflakes (Se, S-DCMs) for PIBs. The porous surface structure resembling diatoms, along with the interconnected carbon fibers within the pores, enhances contact between material and electrolyte, thereby accelerating diffusion of K + . Furthermore, the co-doping of S and Se introduces defects, creating additional reaction sites and increasing capacity. As anodes for PIBs, Se, S-DCMs exhibits high capacity (414 mAh g −1 after 100 cycles at 100 mA g −1 ) and high-rate performance (198 mAh g −1 at 2000 mA g −1 ). This study represents a promising approach for optimizing carbon structures to boosting battery performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Hongjian Chen,Xue Wang,Lixiu Guan,Lei Chen,Junguang Tao
Tin monoxide is an important functional material , which is widely used in energy storage and optoelectronic devices. In this work, SnO micro-plates were synthesized by low-temperature hydrothermal method using aqueous ammonia as reducing agent. The thickness and surface morphology of the SnO micro-plates were delicately controlled by adjusting ammonia concentration. It is shown that surface modification has significant effect on their supercapacitor performance. Specifically, an ultra-high specific capacity of 1080 F•g −1 is obtained, which reaches ~75% of its theoretical faradaic capacitance value. Considering the typical thickness of ~250 nm, the electrons/ions can diffuse ~90 nm into the sample. In addition, the capacity remains an impressive value of 849 F•g −1 after 1000 cycles at current density of 1 A•g −1 , suggesting excellent stability. Our studies show that the non-transition metal oxide, SnO, is a promising supercapacitor electrode material with high specific capacity and good cycle stability.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiaolei Sun,Meiyi Jing,Hong Dong,Wenhe Xie,Feng Luo
Transition metal oxides are said to have the ability to enhance the gravimetric capacity of lithium-ion batteries by two or three times that of current state-of-the-art graphite anodes. Recent reports have demonstrated that the combined utilization of structural architecture and surface modification is an attractive strategy to improve lithium storage capability. In this study, novel CuO-ZnO@Al 2 O 3 submicroflakes were prepared by magnetron sputtering deposition of Cu-Zn alloy films on a removable sacrificial substrate, followed by a facile thermal oxidation treatment and Al 2 O 3 coating procedure by particle atomic layer deposition. They combine the advantages of CuO-ZnO submicroflakes, such as high lithium storage capability and fast lithium ion transportation, and Al 2 O 3 nano-coating with effective protection of the electrode interface during cycling. When utilized as anode materials for LIBs, the CuO-ZnO@Al 2 O 3 submicroflakes exhibit superior specific capacity, enhanced cycling stability, and outstanding rate capability compared with pristine CuO-ZnO submicroflakes, commercial CuO and ZnO powders. The CuO-ZnO@Al 2 O 3 submicroflakes electrodes deliver a high reversible capacity of 814 mAh g −1 at a current density of 50 mA g −1 , and still maintain a moderate capacity of 447 mAh g −1 at a high current density of 1000 mA g −1 . Pairing with a commercial LiFePO 4 cathode, full cell shows high capacity retention and stable cycling performance, suggesting the feasibility of the CuO-ZnO@Al 2 O 3 submicroflakes in practical energy storage applications. In addition, our findings also provide a clear proof-of-concept of the surface coating technique, which might be applied widely to other materials and devices where nano-coating produces desirable properties.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Rui Zhang,Xue Luo,Feiyu Zhao,Qiang Xu,Yang Xu,Yang Xu,Shuo Chen,Xianping Fan,Xvsheng Qiao
GeSe is a narrow band gap semiconductor with feasible application as infrared photoelectric devices . However, challenges are still maintained to improve their carrier concentration and conductivity for broader scope of photodetector applications. Aiming at such scope, the Ge 1- x Sn x Se (0 < x < 0.2) were synthesized via a facile “one-pot” wet chemical method and a lattice site substitution strategy. Compared to the pure GeSe micro-sheets the synthesized Ge 1- x Sn x Se micro-sheets possessed a smaller band gap (0.914 eV) and a better electrical conductivity (2.80 × 10 −5 Ω −1 cm −1 ), where the former exhibit greatly improved photo-current. The Ge 1- x Sn x Se micro-sheet was then assembled into a photodetector device to demonstrate its remarkable photo responsivities in visible to NIR spectral region (3614 A/W at 532 nm and 86 A/W at 1319 nm). The photo-detection range broadening and the responsivity enhancement can be attributed the carrier concentration increment as well as the band gap narrowing. Therefore, the Ge 1- x Sn x Se micro-sheets can be considered as an excellent candidate that can be applied as high performance photodetectors in the visible to near infrared region.
研究领域:
材料科学
·
半导体物理
✓ 已验证
DOI
高影响因子
Chemosensors
·
2021
·Vol. 10
·期 1
·9
·
IF 3.398
Qiyilan Guang,Baoyu Huang,Xiaogan Li
Gold nanoparticles decorated WS2microflakes (Au/WS2) have been synthesized by an in situ chemical reducing process. A chemiresistive-type sensor using as-synthesized Au/WS2heterostructures as sensing materials shows an improved response to different concentrations of ammonia compared to pure WS2at room temperature. As the concentrations of gold nanoparticles increased in heterostructures, response/recovery speeds of the sensors became faster although the sensitivity of the sensor was compromised compared to the sensitivity of the sensor with lower concentrations of Au. In addition, the Au/WS2-based sensor indicated excellent selectivity to formaldehyde, ethanol, benzene and acetone at room temperature. The improved performance of the sensors was attributed to the synergistic effect of electronic sensitization and chemical sensitization between WS2and Au.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 11
·1486
·
IF 4.9
Tingwei Mei,Mingtao Zhu,Hongjian Zhang,Yong Zhang
In recent years, dielectric films with a high energy-storage capacity have attracted significant attention due to their wide applications in the fields of renewable energy, electronic devices, and power systems. Their fundamental principle relies on the polarization and depolarization processes of dielectric materials under external electric fields to store and release electrical energy, featuring a high power density and high charge–discharge efficiency. In this study, sodium bismuth titanate (NBT) micro-flakes synthesized via a molten salt method were treated with hydrogen peroxide and subsequently blended with a polyvinylidene fluoride (PVDF) matrix. An oriented tape-casting process was utilized to fabricate a dielectric thin film with enhanced energy storage capacity under a weakened electric field. Experimental results demonstrated that the introduction of modified NBT micro-flakes facilitated the interfacial interactions between the ceramic fillers and polymer matrix. Additionally, chemical interactions between surface hydroxyl groups and fluorine atoms within PVDF promoted the phase transition from the α to the β phase. Consequently, the energy storage density of PVDF-NBT composite increased from 2.8 J cm−3to 6.1 J cm−3, representing a 110% enhancement. This design strategy provides novel insights for material innovation and interfacial engineering, showcasing promising potential for next-generation power systems.
研究领域:
能源材料
·
高分子材料
·
电子器件
·
电力系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 22
·8030
·
IF 4.927
Youliang Cheng,Jin Zhang,Changqing Fang,Wenke Qiu,Hao Chen,Haonan Liu,Ying Wei
Conductive silver paste is a key material in the fields of printed circuits and printed electronic devices. However, the preparation of conductive silver paste with low-cost and volatile organic compounds (VOCs) is still a challenge. In this work, conductive silver pastes with excellent comprehensive performances were developed by using water-borne polyurethane (WPU) as the bonding phase and using the ternary mixture of Ag microflakes (Ag MFs), Ag nanowires (Ag NWs), and Ag nanoparticles (Ag NPs) as the conductive phase. WPU endowed conductive silver pastes with the adhesion along with releasing a few VOCs during the curing. Results showed that a small amount of Ag NPs or Ag NWs dramatically enhanced the electrical conductivity of silver paste paint film filled only with Ag MFs. The electrical resistivity for optimal ternary mixture conductive silver paste was 0.2 × 10−3Ω∙cm, and the conductive phase was composed of 20.0 wt% Ag MFs, 7.5 wt% Ag NWs, and 2.5 wt% Ag NPs. Meanwhile, the adhesive strength and hardness of silver paste paint film were effectively improved by increasing the curing temperature. The optimal overall performance of the conductive silver pastes was achieved at the curing temperature of 160 °C. Therefore, this work can provide a new route for preparing conductive silver pastes with high performances.Keywords:conductive silver paste;Ag microflakes;Ag nanoparticles;Ag nanowires;ternary fillers
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）