MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qiang Li,Yuwen Li,Lifeng Ding,Xinwang Li,Jianan Ma,Tsuyoshi Minami,Shengbo Sang
Flexible pressure sensors are crucial for applications such as human machine interfaces, soft robotics, electronic skin, and medical diagnostics and therapeutics. However, these sensors face various limitations, such as low sensitivity and slow response times. In this study, we developed an innovative methodology that integrates the pressure transduction mechanism with field-effect modulation principles to fabricate a pressure sensor based on poly (3-hexylthiophene) (P3HT) organic thin-film transistors (OTFTs). We quantitatively analyzed the sensing mechanism of the P3HT OTFT flexible pressure sensor and implemented structural optimizations based on the underlying principles. Consequently, the optimized P3HT OTFT flexible pressure sensor demonstrated exceptional sensing performance, along with low response and recovery times. Furthermore, the sensor exhibited high mechanical durability, enduring over 2000 bending cycles without deterioration. Furthermore, we achieved efficient pressure distribution detection with high-resolution spatial mapping capabilities by integrating the OTFT sensors into wearable arrays, demonstrating significant potential for wearable technology applications. These findings present considerable potential for the implementation of OTFT-based flexible sensors in wearable electronics.
研究领域:
材料科学
·
电子工程
·
传感技术
·
可穿戴设备
·
有机电子学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 48
·2507563
·
IF 19
Ke Su,Lefu Mei,Zunqi Liu,Xin Pan,Pengfei Shuai,Jiyang Xie,Bin Ma,Qingfeng Guo,Cunjian Lin,Mingxing Chen,Zhijian Peng,Libing Liao,Wanbiao Hu,Guocheng Lv
Balancing sensitivity and detection range in dynamic pressure monitoring materials remains challenging, with commercial ruby (Al 2 O 3 :Cr 3+ ) sensors limited by strong crystal fields, restricting performance under extreme conditions. Here, an innovative strategy utilizing an ordered-to-disordered structural conversion in Cr 3+ doped Ca(Mg,Sc)(Al,Si)O 6 phosphors is introduced. This approach achieves a remarkable blueshift sensitivity of 15.08 nm GPa −1 –2.8 times higher than ordered structures and 41 times higher than commercial sensors while maintaining a broad detection range up to 7.5 GPa. Moreover, enhanced structural rigidity notably improves luminescence intensity and thermal stability. The findings establish a robust paradigm for designing high-performance optical pressure sensors, significantly addressing the traditional trade-off between sensitivity and detection range, showing promising applications in geological exploration and aerospace fields.
研究领域:
材料科学
·
光学传感器
·
高压物理
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2024
·
IF 2.4
Xin Zhang,Deyuan Yao,Xiaomei Pan,Erqiao Xue,Peng Cheng,Tingting Ye,Junfeng Ding
The crystal structures of liquid crystals, particularly various oligomers, have garnered significant attention, laying the groundwork for developing new materials and devices. Here, we demonstrate pressure plays a crucial role in the structure of liquid crystals. High-pressure Raman and photoluminescence spectra were on 5CB (4-cyano-4’−pentylbiphenyl) liquid crystal. Upon compression, the appearance of prominent fluorescence peaks suggests a phase transition. The Raman peaks, reflecting the C–H and C≡N bonds, exhibit splitting at a pressure of 3.2 GPa, further confirming the pressure-induced phase transition. The splitting is consistent with earlier calculations on the stretching vibration of the C≡N bond for various oligomers and indicates a phase transition from monomers to dimers in 5CB liquid crystal. The opposite shifts in Raman modes under pressure, specifically the blue-shift of C–H bonds and the red-shift of C≡N bonds, indicate that pressure enhances intermolecular interactions and leads to conjugation between the electrons on the C≡N bonds and the C–H bonds, resulting in dimer formation. Our findings not only reveal a novel strategy for producing oligomers in liquid crystals through the application of high pressure but also highlight that Raman spectroscopy is a valid, non-contact method for investigating the mechanisms of oligomerization.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wang Guo,Zhiqiang Ma,Zhou Chen,Haojun Hua,Dong Wang,Mohamed Elhousseini Hilal,Yatian Fu,Pengyi Lu,Jian Lu,Yuanting Zhang,Derek Ho,Bee Luan Khoo
Increasing demand for flexible sensors in healthcare has spurred the development of nanomaterial-polymer composite sensors. However, existing pressure sensors suffer from low sensitivity due to poor interactions between the functional filler and the polymer matrix. For example, the direct chemical bonding of nanomaterials to the surface of chemically inert polymers such as polydimethylsiloxane (PDMS) is not easily achieved. Herein, we demonstrate that MXene can significantly promote the sensitivity of a thin and soft piezoresistive sensor based on a surface functionalized PDMS (FPDMS) sponge. Using plasma treatment, we constructed a MXene-FPDMS (MFP) sponge with high mechanical strength via the interlayer hydrogen bonding effect. The formed MFP sponge structure (∼450 μm in thickness) endows the pressure sensor with a high sensitivity of 14.2 kPa −1 and a low modulus of 9.7 kPa, critical for detecting ultra-low pressures. When operated with deep learning algorithms, the MFP sponge sensor successfully classifies the pronunciation of 26 letters and various polite expressions with an average accuracy of 94 ± 0.6 %. We envision that this work paves the way for the development of intelligent wearable platforms.
研究领域:
材料科学
·
电子工程
·
人工智能
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2016
·Vol. 49
·期 34
·345102
·
IF 2.772
Lei Wu,LiDong Dai,HePing Li,YuKai Zhuang,KaiXiang Liu
Yttrium-doped BaZrO3 (BZY) is a promising electrolyte for intermediate-temperature protonic ceramic fuel cells. However, BZY exhibits a high resistance because of the blocking effect of the grain boundaries. In this study, the effect of pressure on undoped and 5% yttrium-doped BaZrO3 (BZY0 and BZY5) were investigated at 0.45–24.01 GPa and 273–673 K with a diamond anvil cell. Their bulk, grain boundary, and total electrical conductivities were determined by impedance spectroscopy and direct-current resistance measurement. Both samples tended to show increasing electrical conductivity with increasing pressure, although each showed a discontinuous inflexion point (at ~14.54 GPa for BZY0 and at ~11.11 GPa for BZY5) indicating a phase transition from a cubic to a tetragonal structure. The samples showed a 3.43 GPa difference in the onset pressure of the structure change. Characteristic parameters, including space charge potential, relaxation frequency, and transport activation energy, were obtained before and after the phase transition. The results suggest that pressure significantly improves oxygen ion conduction in acceptor-doped perovskites oxides.
研究领域:
材料科学
·
能源研究
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Junshuai Chen,Qi Zhou,Taotao Zhan,Maogang He,Ying Zhang
Methyl hexanoate, which was found to be the simplest methyl ester to present a strong cool flame behavior, is expected to be one of the main components of biodiesels. Details of the experimental speeds of sound in methyl hexanoate are scarce up to now. Therefore, the speed of sound in liquid methyl hexanoate was measured by the Brillouin light scattering method in the temperature range of 297.83–588.07 K and at pressures of up to 10 MPa. The relative uncertainty of the speed of sound experimental system is estimated to be less than 0.43%, and when considering the impurity of the sample, the relative uncertainty is 0.47%. The variation of the speed of sound with the temperature and pressure was analyzed. Besides, the correlation for the speed of sound as a function of temperature and pressure is presented based on the experimental data. The absolute average of relative deviation between the experimental data and the calculated results is 0.44%.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS LETTERS
·
2017
·Vol. 110
·期 12
·
IF 3.411
Zhuang YuKai,Dai LiDong,Wu Lei,Li HePing,Hu HaiYing,Liu KaiXiang,Yang LinFei,Pu Chang
This report presents a pressure-induced permanent metallization for MoS 2 under non-hydrostatic conditions. Impedance and Raman spectra were measured to study the pressure-induced structural and electronic transformations of MoS 2 at up to ∼25 GPa in diamond anvil cells under both non-hydrostatic and hydrostatic conditions. The results show evidence for isostructural hexagonal distortion from 2 Hc to 2 Ha and metallization at ∼17 GPa and ∼20 GPa under non-hydrostatic and hydrostatic conditions, respectively. Interestingly, the metallization is irreversible only under non-hydrostatic compression. We attribute this phenomenon to the incorporation of molecules of pressure medium between layers, which mitigate compressed stress and reduce interlayer interaction.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2017
·
IF 2.473
Kai Kang,Xiaopo Wang
The experimental measurements for liquid densities of n -decane and p -xylene binary mixtures were performed over the entire composition with a high-pressure vibrating-tube densimeter. The temperature ranges for the present measurement were from 293.15 K to 363.15 K and the pressures were reached to 60 MPa. The experimental uncertainty is estimated to be 0.001 with 0.95 confidence level. Experimental density values were fitted by the modified Tammann–Tait equation. The PC-SAFT equation of state and Cibulka's equation was used to predict the densities of n -decane and p -xylene and its mixtures. In addition, derived volumetric properties, such as the excess molar volumes , the isothermal compressibility , and isobaric thermal expansivity, were calculated from the experimental density data. The effects of pressure and temperature on the derived properties were also discussed.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2023
·Vol. 52
·期 12
·1331-1351
·
IF 1.2
Chen Zhirong,Yao Yang,Yuan Shenfeng,Yin Hong
Critical temperature, critical pressure and P–T–ρ–X data of acetone–water solutions with water mole fractions in a range of 0–60% were measured to provide fundamental data for CFD simulations. Critical temperatures were determined via observing critical opalescence in fused quartz capillary tubes. Meanwhile, critical pressures were measured by heating acetone–water solutions to its critical temperature in an autoclave. The standard deviations of critical temperature and critical pressure were 0.55 K and 0.029 MPa, respectively. The results indicate that only one phase exists during mixing of acetone with water. Moreover, P–T–ρ–X data under 15 and 20 MPa in the temperature range of 460–550 K were measured in the autoclave. The relative deviation of density was 0.32%. Volume-translated Peng-Robinson and Soave–Redlich–Kwong state equations were used to illustrate the P–V–T–X relationship of acetone–water solutions, and the Peng–Robinson state equation with an average absolute relative deviation of 1.19% between fitting and experimental densities was found more accurate.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 10
·1804559
·
IF 10.856
Xing Tang,Congyi Wu,Lin Gan,Tian Zhang,Tingting Zhou,Jin Huang,Hao Wang,Changsheng Xie,Dawen Zeng
Flexible pressure sensors as electronic skins have attracted wide attention to their potential applications for healthcare and intelligent robotics. However, the tradeoff between their sensitivity and pressure range restricts their practical applications in various healthcare fields. Herein, a cost-effective flexible pressure sensor with an ultrahigh sensitivity over an ultrawide pressure-range is developed by combining a sandpaper-molded multilevel microstructured polydimethylsiloxane and a reduced oxide graphene film. The unique multilevel microstructure via a two-step sandpaper-molding method leads to an ultrahigh sensitivity (2.5–1051 kPa −1 ) and can detect subtle and large pressure over an ultrawide range (0.01–400 kPa), which covers the overall pressure regime in daily life. Sharp increases in the contact area and additional contact sites caused by the multilevel microstructures jointly contribute to such unprecedented performance, which is confirmed by in situ observation of the gap variations and the contact states of the sensor under different pressures. Examples of the flexible pressure sensors are shown in potential applications involving the detection of various human physiological signals, such as breathing rate, vocal-cord vibration, heart rate, wrist pulse, and foot plantar pressure. Another object manipulation application is also demonstrated, where the material shows its great potential as electronic skin intelligent robotics and prosthetic limbs.
研究领域:
生物医学工程
·
柔性电子学
·
传感技术
·
可穿戴设备
·
转化医学
·
智能材料
·
人机交互
✓ 已验证
DOI
高影响因子
Microstructures
·
2024
·Vol. 4
·期 1
·N
·
IF 0
Yanmei Ma,Hongbo Wang,Ruihong Li,Han Liu,Jian Zhang,Xianyu Wang,Qiang Jing,Xu Wang,Wenping Dong,Jinman Chen,Bingze Wu,Yonghao Han,Dan Zhou,Chunxiao Gao
Owing to their unique compositional and structural characteristics, layered van der Waals solids in binary and ternary chalcogenide families provide a fertile testbed for exploring novel exotic structures and states, e.g., topological insulators and superconductors. Herein, a comprehensive study on the structural variations and correlated electrical transport behavior of SnSb2Te4, a ternary member, has been carried out considering elevated pressures. Under 45.6 GPa, three distinct structural phase transitions have been observed, with strong evidence from the variations of high-pressure X-ray diffraction patterns. The onsets of phase II (monoclinic, C2/m) at 6.3 GPa, phase III (monoclinic, C2/c) at 15.5 GPa, and phase IV (body-centered cubic with substitutional disorder, Im-3m) at 17.2 GPa have been observed owing to the emergence of new diffractions. Based on electrical measurements at low temperature and high pressure conditions, two pressure-induced superconducting states have been distinguished in SnSb2Te4. The first state occurs in the range of 12.3-17.1 GPa. The positive pressure dependence on Tc indicates that the aforementioned state is related to the monoclinic C2/m phase. At > 17.1 GPa, the second superconducting state emerges, with the negative pressure dependence on Tc. It relates to the body-centered cubic solid solution phase, which is characteristic of a substitutional disordered crystal structure. The discovery that the pressure-induced superconductivity in SnSb2Te4 is affected by structural phase transitions under pressure may help understand the universal relationship between the ambient condition topological insulating state and derived superconductivity. Ab initio theoretical calculations reveal that an electronic topological transition takes place at approximately 2.0 GPa, which is featured by the obvious changes in the distribution of electronic density of states near the Fermi level.
研究领域:
凝聚态物理
·
材料科学
✓ 已验证
DOI
ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Lulu Zhang,Biao Peng,Luyao Wang,Chao Guo,Qingyi Wang
Strict control of the monodispersity and size of hydrothermal carbon nanospheres (CNSs) with a size less than 150 nm is a prerequisite for many applications. However, designing and achieving the mass production of high-quality glucose-derived CNSs have been very challenging. Herein, we successfully synthesize PCNSs-PSSMA through a simple method that is synergistically assisted by an external pressure (2.0 MPa) and a small amount of poly(4-styrenesulfonic acid-co-maleic acid) sodium salt (PSSMA). The mechanism of the external pressure and PSSMA effect on the synthesis of PCNSs-PSSMA is investigated. On the one hand, the pressure and PSSMA can increase the glucose hydrothermal carbonation (HTC) rate and increase the number of carbon nuclei. On the other hand, PSSMA adsorbs on the surface of the CNSs to inhibit their growth so that more raw materials can be used for nucleation. When limited by the raw materials, it is difficult for CNSs to continue to grow. Furthermore, we also verify that PCNSs-PSSMA is superior in terms of adsorption and catalysis to large carbon spheres prepared by traditional methods. Our findings provide potential guidance for the mass production of other small particle size nanomaterials.
研究领域:
材料科学
·
化学工程
✓ 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）