JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Mingxin Zhang,Cuiying Pei,Qi Wang,Yi Zhao,Changhua Li,Weizheng Cao,Shihao Zhu,Juefei Wu,Yanpeng Qi
Recently, the discovery of superconductivity with a critical temperature T c up to 80 K in Ruddlesden–Popper phases La n +1 Ni n O 3 n +1 ( n = 2) under pressure has garnered considerable attention. Up to now, the superconductivity was only observed in La 3 Ni 2 O 7 single crystal grown with the optical-image floating zone furnace under oxygen pressure. It remains to be understood the effect of chemical doping on superconducting La 3 Ni 2 O 7 as well as other Ruddlesden–Popper phases. Here, we systematically investigate the effect of external pressure and chemical doping on polycrystalline Ruddlesden–Popper phases. Our results demonstrate that the application of pressure and doping effectively tunes the transport properties of Ruddlesden–Popper phases. We find pressure-induced superconductivity up to 86 K in La 3 Ni 2 O 7 polycrystalline sample, while no signatures of superconductivity are observed in La 2 NiO 4 and La 4 Ni 3 O 10 polycrystalline samples under high pressure up to 50 GPa. Our study sheds light on the exploration of high- T c superconductivity in nickelates.
研究领域:
凝聚态物理
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS-CONDENSED MATTER
·
2021
·Vol. 33
·期 26
·265701
·
IF 2.333
Chengping He,Xue Ming,Qing Li,Xiyu Zhu,Jin Si,Hai-Hu Wen
Recently, superconductivity at about 9–15 K was discovered in Nd1−xSrxNiO2 (Nd-112, x ≈ 0.125–0.25) infinite-layer thin films, which has stimulated enormous interests in related rare-earth nickelates. Usually, the first step to synthesize this 112 phase is to fabricate the RNiO3 (R-113, R: rare-earth element) phase, however, it was reported that the 113 phase is very difficult to be synthesized successfully due to the formation of unusual Ni3+ oxidation state. And the difficulty of preparation is enhanced as the ionic radius of rare-earth element decreases. In this work, we report the synthesis and investigation on multiple physical properties of polycrystalline perovskites Sm1−xSrxNiO3 (x = 0, 0.2) in which the ionic radius of Sm3+ is smaller than that of Pr3+ and Nd3+ in related superconducting thin films. The structural and compositional analyses conducted by x-ray diffraction and energy dispersive x-ray spectrum reveal that the samples mainly contain the perovskite phase of Sm1−xSrxNiO3 with small amount of NiO impurities. Magnetization and resistivity measurements indicate that the parent phase SmNiO3 undergoes a paramagnetic–antiferromagnetic transition at about 224 K on a global insulating background. In contrast, the Sr-doped sample Sm0.8Sr0.2NiO3 shows a metallic behavior from 300 K down to about 12 K, while below 12 K the resistivity exhibits a slight logarithmic increase. Meanwhile, from the magnetization curves, we can see that a possible spin-glass state occurs below 12 K in Sm0.8Sr0.2NiO3. Using a soft chemical reduction method, we also obtain the infinite-layer phase Sm0.8Sr0.2NiO2 with square NiO2 planes. The compound shows an insulating behavior which can be described by the three-dimensional variable-range-hopping model. And superconductivity is still absent in the polycrystalline Sm0.8Sr0.2NiO2.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qiancheng Shang,Junsheng Yu,Rong Hu,Zixiong Liu,Jiang Cheng,Ying Li,Xuxia Shai,Ming-ming Huo,Xin Yang,Lu Li
In this study, a novel metal oxide, lanthanum nickelate (LNO) with a perovskite structure, was introduced into a polymer solar cell (PSC) device, replacing the PEDOT:PSS hole transport layer (HTL). The results show that the LNO-based PTB7-Th:PC71BM solar cell exhibits a higher circuit current density, power conversion efficiency, and stability compared with a device with PEDOT:PSS HTL. To understand the effect of LNO HTL on the performance of devices, the active layer morphology and charge transport characteristics in PSCs were systematically analyzed. The morphology of active layer was affected by the HTL, which further regulated the generation and transport processes of charge carrier in the PSC device. For the LNO HTL, an appropriate thickness (8 nm) and a small surface roughness (Sq = 0.7 nm) can coordinate the energy-level structure of device and improve the interface contact between the FTO electrode and PTB7-Th:PC71BM active layer, promoting the charge transport performance of device. Therefore, this work provides a new consideration for the preparation of efficient, stable, and low-cost polymer solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
L.Z. Pei,T. Wei,N. Lin,H. Zhang
Single crystalline bismuth nickelate nanorods with cubic Bi 12 NiO 19 phase and flat tips have been successfully synthesized by a facile hydrothermal route without any additives. Electron microscopy observations show that the length and diameter of the bismuth nickelate nanorods are 1–3 μm μm and 30–100 nm, respectively. The formation, length and diameter of the nanorods depend on the hydrothermal temperature and duration time. The formation of the bismuth nickelate nanorods are explained according to the nucleation and crystalline growth process. The bismuth nickelate nanorods are applied as the glassy carbon electrode (GCE) materials for the detection of tartaric acid in KCl solution. The roles of scan rate, electrolyte species and tartaric acid concentration on the electrochemical responses of tartaric acid have been investigated. The obtained linear concentration calibration plot shows a low detection limit of 0.52 μm, wide linear range of 0.001–2 mM and correlation coefficient of 0.996. The bismuth nickelate nanorods modified GCE shows good reproducibility and stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NATURE
·
2024
·Vol. 631
·期 8021
·531-536
·
IF 50.5
Zhu Yinghao,Peng Di,Zhang Enkang,Pan Bingying,Chen Xu,Chen Lixing,Ren Huifen,Liu Feiyang,Hao Yiqing,Li Nana,Xing Zhenfang,Lan Fujun,Han Jiyuan,Wang Junjie,Jia Donghan,Wo Hongliang,Gu Yiqing,Gu Yimeng,Ji Li,Wang Wenbin,Gou Huiyang,Shen Yao,Ying Tianping,Chen Xiaolong,Yang Wenge,Cao Huibo,Zheng Changlin,Zeng Qiaoshi,Guo Jian-gang,Zhao Jun
The pursuit of discovering new high-temperature superconductors that diverge from the copper-based model 1 , 2 , 3 has profound implications for explaining mechanisms behind superconductivity and may also enable new applications 4 , 5 , 6 , 7 , 8 . Here our investigation shows that the application of pressure effectively suppresses the spin–charge order in trilayer nickelate La 4 Ni 3 O 10− δ single crystals, leading to the emergence of superconductivity with a maximum critical temperature ( T c ) of around 30 K at 69.0 GPa. The d.c. susceptibility measurements confirm a substantial diamagnetic response below T c , indicating the presence of bulk superconductivity with a volume fraction exceeding 80%. In the normal state, we observe a strange metal behaviour, characterized by a linear temperature-dependent resistance extending up to 300 K. Furthermore, the layer-dependent superconductivity observed hints at a unique interlayer coupling mechanism specific to nickelates, setting them apart from cuprates in this regard. Our findings provide crucial insights into the fundamental mechanisms underpinning superconductivity, while also introducing a new material platform to explore the intricate interplay between the spin–charge order, flat band structures, interlayer coupling, strange metal behaviour and high-temperature superconductivity.
研究领域:
物理学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xingyuan Wang,Xuefeng Zhang,Yibo Sun,Hui Zhang,Cuiying Pei,Mohan Zhao,Jiayin Zhou,Qijuan Tang,Huiqi Chen,Bingxu Xi,Yanpeng Qi,Zhi Liu,Gang Li,Xiaofei Guan
Perovskite rare earth nickelates possess the electronic phase transition property that can be harnessed for a multitude of exciting applications. Herein, we report the use of high-valence cations (Zn 2+ and Al 3+ ) to reconstruct the electronic band structure of samarium nickelate (SmNiO 3 ) and realize reversible resistivity modulation. Under positive gate voltage, the resistivity of SmNiO 3 exhibits a colossal increase upon the Zn 2+ intercalation and the concurrent electron doping. Under negative gate voltage, the Zn 2+ ions are extracted and the resistivity decreases significantly. The resistivity modulation using Zn 2+ is non-volatile. Electrochromic behavior is also observed during the Zn 2+ insertion and extraction. The electronic phase transition is characterized using various techniques. Moreover, the trivalent Al 3+ ions are also investigated as charge carriers to modulate the resistivity of SmNiO 3 in a volatile manner. First-principles density functional theory calculations reveal the effect of electron doping on the electronic band structure. The resistivity change of SmNiO 3 is mainly attributed to the structural distortion induced by electron doping, rather than the Mott-like insulation. This work demonstrates the feasibility of reversible resistivity modulation of SmNiO 3 with the use of high-valence cations under applied voltage, underscoring the potential for applications in novel emerging electronic devices.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jinyu Bao,Xintao Jiang,Lingzhi Huang,Wei Quan,Chenxu Zhang,Yanan Wang,Haibo Wang,Yi Zeng,Weijin Zhang,Yongxiang Ma,Shansheng Yu,Xiaoying Hu,Hongwei Tian
Interfacial design and the co-catalyst effect are considered to be effective to achieve separation and transport of photogenerated carriers in composite photocatalysts . In this study, a Z-scheme heterojunction was successfully combined with a co-catalyst to achieve a highly efficient LaNiO 3 /g-C 3 N 4 /MoS 2 photocatalyst. MoS 2 flakes were loaded on a hybrid material surface, which was formed by LaNiO 3 nanocubes embedded on layered g-C 3 N 4 , and a good heterostructure with multiple attachment sites was obtained. Experimental studies confirmed that the Z-scheme heterojunction completely preserves the strong redox ability of the photogenerated electrons and holes. As a cocatalyst, MoS 2 further promoted interfacial charge separation and transport. The synergistic effect of the Z-scheme heterojunction and co-catalyst effectively realized the transfer of photogenerated carriers from “slow transfer” to “high transfer” and promoted water decomposition and pollutant degradation. Results revealed that under simulated sunlight irradiation, LaNiO 3 /g-C 3 N 4 /MoS 2 composites exhibit superior hydrogen evolution of 45.1 μmol h −1 , which is 19.1 times that of g-C 3 N 4 and 4.9 times that of LaNiO 3 /g-C 3 N 4 , respectively. Moreover, the LaNiO 3 /g-C 3 N 4 /MoS 2 Z-scheme photocatalyst exhibited excellent photocatalytic performance for antibiotic degradation and heavy-metal ion reduction under visible light . This study might provide some insights into the development of photocatalysts for solar energy conversion and environmental remediation.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Horizons
·
2024
·Vol. 11
·期 11
·2749-2758
·
IF 12.2
Pengfei Tan,Chuanhui Zhu,Xiaosheng Ni,Han-Qing Wu,Shuang Zhao,Tao Xia,Jinjin Yang,Tao Han,Mei-Huan Zhao,Yifeng Han,Yuanhua Xia,Zheng Deng,Muwei Wu,Dao-Xin Yao,Man-Rong Li
The intricate correlation between lattice geometry, topological behavior and charge degrees of freedom plays a key role in determining the physical and chemical properties of a quantum-magnetic system. Herein, we investigate the introduction of the unusual oxidation state as an alternative pathway to modulate the magnetic ground state in the well-known S = 1 Haldane system nickelate Y2BaNiO5 (YBNO). YBNO is topologically reduced to incorporate d9-Ni+ (S = 1/2) in the one-dimensional Haldane chain system. The random distribution of Ni+ for the first time results in the emergence of a one-dimensional ferromagnetic phase with a transition temperature far above room temperature. Theoretical calculations reveal that the antiferromagnetic interplay can evolve into ferromagnetic interactions with the presence of oxygen vacancies, which promotes the formation of ferromagnetic order within one-dimensional nickel chains. The unusual electronic instabilities in the nickel-based Haldane system may offer new possibilities towards unconventional physical and chemical properties from quantum interactions.
研究领域:
凝聚态物理
·
量子磁性
·
材料科学
·
无机化学
·
强关联电子系统
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 1
·147-153
·
IF 3.9
Hongzheng Li,Ying Li,Bo Li,Wenlong Huang,Yushi Ding
ReNiO3 (Re = Pr, Sm, Eu) solid electrolytes were prepared by the sol–gel method, which were sintered in a pure oxygen atmosphere of 20 MPa at 1000 °C for 24 hours. The DC resistivities of the three materials in air and in a hydrogen-containing atmosphere were tested respectively. The resistivities in the hydrogen-containing atmosphere were about 102, 104, and 105 times higher than those in air and XPS analysis showed that after 10%H2–Ar treatment, the proportion of Ni2+ of PrNiO3, SmNiO3 and EuNiO3 increased successively. The proton transport number of PrNiO3 was lower than 0.5 at 50–500 °C, and SmNiO3 and EuNiO3 were almost pure proton conductors below 200 °C. The conductivities of SmNiO3 and EuNiO3 were 1.08 × 10−4 S cm−1 and 1.83 × 10−5 S cm−1 at 200 °C in 5%H2–Ar. The hydrogen sensing properties of SmNiO3 and EuNiO3 show that the measurement results of the two materials were accurate in the range of 0.5–10% H2.
研究领域:
材料科学
·
固态离子学
·
能源材料
·
无机化学
·
传感器技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 182
·期 5
·1071-1077
·
IF 3.719
Dong Yajuan,Su Ming,Chen Peiyun,Sun Hanwen
Aqueous solutions of carbon dots (C-dots) were prepared by microwave-assisted thermal carbonization of poly(ethylene glycol). They were investigated by transmission electron microscopy, absorption and fluorescence spectra. It is shown that diperiodato-nicklate(IV), a strong oxidant, induces the chemiluminescence (CL) of C-dots in strongly alkaline solution without use of an additional reagent. A mechanism for this reaction is suggested. It is also found that the CL of the system is quenched by paracetamol, L-cysteine and glutathione. Under the optimized conditions, the calibration plot is linear with a correlation coefficient (r) of >0.995. The limits of detection are 90, 8, and 60 µg L- 1 for paracetamol, L-cysteine, and glutathione, respectively. Spiked urine and serum samples were analyzed and gave recoveries in the range from 84.38 to 116.0 %, with an RSD of 1.2–2.7 %.
Use of diperiodato-nickelate(IV) induces the chemiluminescence of carbon dots in alkaline solution without use of an additional reagent. And using inhibitory effect of the target analyte on the CL achieved the determination of paracetamol, L-cysteine and glutathione.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Hu Kejun,Li Qing,Song Dongsheng,Jia Yingze,Liang Zhiyao,Wang Shuai,Du Haifeng,Wen Hai-Hu,Ge Binghui
The recent discovery of superconductivity in infinite-layer nickelate films has sparked significant interest and expanded the realm of superconductors, in which the infinite-layer structure and proper chemical doping are both of the essence. Nonetheless, the reasons for the absence of superconductivity in bulk infinite-layer nickelates remain puzzling. Herein, we investigate atomic defects and electronic structures in bulk infinite-layer Nd 0.8 Sr 0.2 NiO 2 using scanning transmission electron microscopy. Our observations reveal the presence of three-dimensional (3D) block-like structural domains resulting from intersecting defect structures, disrupting the continuity within crystal grains, which could be a crucial factor in giving rise to the insulating character and inhibiting the emergence of superconductivity. Moreover, the infinite-layer structure, without complete topotactic reduction, retains interstitial oxygen atoms on the Nd atomic plane in bulk nickelates, possibly further aggravating the local distortions of NiO 2 planes and hindering the superconductivity. These findings shed light on the existence of structural and atomic defects in bulk nickelates and provide valuable insights into the influence of proper topotactic reduction and structural orders on superconductivity.
研究领域:
材料科学
·
凝聚态物理
·
超导
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）