LANGMUIR
·
2025
·
IF 3.9
Anhui Yu,Zhiguang Guo
Droplet manipulation on functional surfaces is an urgent problem to be solved. Fast and precise droplet manipulation plays an important role in many applications, such as microreactors and microfluidics. Although numerous techniques have been developed to manipulate droplets by injecting external stimuli, it remains a challenge to achieve high-precision, high-sensitivity, and fast droplet manipulation on smart, slippery response surfaces. Here, we report an intelligent slippery photopyroelectric response near-infrared-induced MXene-barium titanate/polyimide (SFMBPI) membrane. By using local near-infrared radiation (NIR), we can precisely control the droplet transport on the SFMBPI membrane, and SFMBPI uses electrospinning technology to better lock the dimethylsilicone oil, reducing the loss during the control process. Moreover, due to the presence of the pyroelectric layer, double external stimuli can be achieved. The thermal stimulation of the photothermal layer and the charge action of the pyroelectric layer make the manipulation of droplets on the SFMBPI surface more efficient and faster. Moreover, the experiment of negative gravity transport at an inclination angle of 6° demonstrates that the existence of the pyroelectric layer results in a greater driving force on the droplets, which can be more widely used. In addition, by inducing the direction of the NIR, programmable droplet transport and droplet merging can be achieved. Also, the SFMBPI membrane can be used for underwater bubble manipulation. This precise manipulation of droplets on the surface of SFMBPI membranes can be widely used in other fields, such as microfluidics.
研究领域:
材料科学
·
微流控技术
·
表面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
You Xue,Tao Yang,Enhui Wang,Hongyang Wang,Laipan Zhu,Sheng Cao,Xinmei Hou,Kuo-Chih Chou
Compression and tensile strain based on piezo-phototronic effect represent a valid method for modulating the photocurrent of photodetectors. However, the underlying mechanism responsible for the asymmetric increase/decrease of photocurrent under identical compressive/tensile stresses remains unclear. Herein, a PVDF/CsPbBr 3 composite fiber incorporating orthorhombic CsPbBr 3 (a piezoelectric phase) is fabricated through room-temperature electrospinning. Subsequently, flexible photodetectors (PDs) based on PVDF/CsPbBr 3 are constructed to explore the impact of strain on photocurrent. The results reveal a 103% increase in photocurrent under a strain of −0.09% (compressive strain), significantly exceeding the 38% decrease observed under a strain of 0.09% (tensile strain). Furthermore, the piezoelectric and ferroelectric properties of the orthorhombic CsPbBr 3 are computed using density functional theory (DFT), confirming that the asymmetric modulation of photocurrent stems from the nature of the piezoelectric effect and ferroelectric effect. Additionally, the ferroelectric effect exerts a more pronounced influence on the photocurrent, which is 2.2 times greater than the piezoelectric effect. This work provides compelling evidence for the piezoelectric and ferroelectric effects of inorganic halide perovskites, underscoring the substantial potential of these effects in optoelectronic devices.
研究领域:
材料科学
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光学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2016
·Vol. 29
·期 6
·1604724
·
IF 18.96
Keyu Xie,You You,Kai Yuan,Wei Lu,Kun Zhang,Fei Xu,Mao Ye,Shanming Ke,Chao Shen,Xierong Zeng,Xiaoli Fan,Bingqing Wei
Graphical A brand new polysulfide entrapping strategy based on the ferroelectric effect has been demonstrated for the first time. By simply adding the nano-ferroelectrics (BaTiO 3 nanoparticles) into the cathode, the heteropolar polysulfides can be anchored within the cathode due to the internal electric field originated from the spontaneous polarization BaTiO 3 nanoparticles, and thus significantly improving the cycle stability of Li–S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2021
·
IF 17.881
Rui Li,Guoqiang Zhang,Yingtao Wang,Zhangwen Lin,Chuanxin He,Yongliang Li,Xiangzhong Ren,Peixin Zhang,Hongwei Mi
Acceleration of reaction kinetics is urgently pursued for high-rate sodium ion batteries, while the utilization of ferroelectric and piezoelectric effect to form local micro electric field to facilitate ion transport has rarely been reported. Herein, a coherent tin oxide/barium titanate heterostructure encapsulated inside nitrogen-doped carbon nanofibers (SnO 2 /BaTiO 3 @NCNF) is introduced as sodium ion battery anode, exhibiting high capacity retention (82% over 2000 cycles at 2 A g 1 ) and stunning long-term cyclability (183.4 mAh g 1 after 10,000 cycles at 5 A g 1 ). The local potential produced by piezoelectric and ferroelectric effect of BaTiO 3 (BTO) can boost sodium ion diffusion kinetics and promote rate performance of SnO 2 anode. The piezoelectric effect is initiated from exploiting the drawback of volume expansion of SnO 2 , while the ferroelectric effect is originated from the charge separation of polarized BTO particles under external electric field. Such principle is instructive for alloying-type and convention-type anodes of alkali-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
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固态物理
·
电池技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Li Xin,Ying Zhiqin,Liu Linhui,Wu Jun,Ma Haofan,He Ziyu,Yu Yunyun,Sun Yihan,Zhang Meili,Guo Xuchao,Zeng Yuheng,Yang Xi,Ye Jichun
Wide bandgap (WBG) perovskites hold tremendous potential for enabling efficient perovskite/silicon tandem solar cells. However, interfacial energy losses at the perovskite/electron selective contact interface remain a substantial obstacle in approaching its theoretical efficiency limit. Herein, for the first time, a multifunctional cage-like diammonium chloride molecule, featuring Lewis acid/base groups and strong molecular polarity, is designed to reduce film defects and modulate the interfacial dipole, thereby suppressing non-radiative recombination and optimizing surface band alignment. More importantly, the unique cage-like cation can induce the formation of a phase-pure quasi-2D perovskite with spontaneous in-plane orientation and exhibits a pronounced ferroelectric effect, facilitating carrier further apart and extraction by upshifting the surface work function. Consequently, we achieve 1.68 eV perovskite solar cells with power conversion efficiencies (PCEs) of 22.6% (0.1 cm 2 ) and 21.0% (1.21 cm 2 ). Furthermore, two-terminal monolithic perovskite/silicon tandem solar cells based on tunnel oxide passivating contact yield an impressive PCE of 31.1% (1.0 cm 2 ) and demonstrate a decent operational stability (ISOS-L-1, T 85 > 1020 h in ambient conditions without encapsulation). The ferroelectric interface physics opens new possibilities for efficient and stable perovskite-based tandem photovoltaics.
研究领域:
材料科学
·
光伏技术
·
表面物理
·
纳米结构材料
·
能源材料
·
半导体器件
·
功能分子设计
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）