ACS Nano
·
2025
·
IF 16
Chenxi Huang,Zeyu Li,Jiefu Zhang,Shengtao Cui,Jun Fu,Yue Xing,JingJing Wang,Zhe Sun,Hualing Zeng,Zhenhua Qiao,Xiang Shao
The coupling between transition metal dichalcogenides (TMDCs) and SrTiO3 has recently emerged as a fertile platform for discovering interfacial phenomena, where particle interactions, lattice coupling, and dielectric screening give rise to interesting physical effects. These hybrid systems hold significant promise for two-dimensional (2D) electronics, ferroelectric state control, and metastable phase engineering. However, effective modulation of the interfacial electronic structure remains a critical challenge. Here, we investigate the MoS2/SrTiO3 heterostructure using scanning tunneling spectroscopy (STS), angle-resolved photoemission spectroscopy (ARPES), and photoemission spectroscopy (PES), complemented by first-principles calculations. We observe a temperature-dependent evolution of the electronic structure and local density of states driven by the structural phase transition of the SrTiO3 substrate. This modulation proceeds without conventional band reconstruction but leads to direct changes in the bandgap. Our findings may unveil a robust and spatially uniform mechanism for electronic structure control, offering a temperature-triggered degree of freedom for engineering interfacial states in TMDC-based devices.
研究领域:
凝聚态物理
·
材料科学
·
表面科学
·
二维电子学
·
介电材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 16
·118685
·
IF 6.3
Xiaohua Yang,Chao Cheng,Haochen Qi,Cen Liang,Yingtang Zhang,Yi Yu,Shouguo Huang,Jian zhang,Chunchang Wang
SrTiO 3 (ST) ceramics exhibit high breakdown strength ( E b ) but suffer from low polarization, limiting their recoverable energy density ( W rec ). Herein, we propose a multivalent Sn dual-site doping strategy to concurrently enhance polarization and E b . The co-occupation of A-sites by Sn 2 + and B-sites by Sn 4+ promotes the formation of polar nanoregions (PNRs) while suppressing deleterious interfacial polarization. This synergistic mechanism yields a substantial maximum polarization of 25 μC/cm 2 and a robust E b of 640 kV/cm in the optimal composition ( x = 0.02). Consequently, a superior W rec of 6.1 J/cm 3 and a high efficiency ( η ) of 90.58% are achieved. Furthermore, the ceramics demonstrate outstanding pulsed charge-discharge performance, delivering a power density of 125 MW/cm 3 with an ultrafast discharge time of 23.3 ns. This work highlights the critical role of defect engineering and valence state engineering in optimizing the energy storage properties of ST-based ceramics.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 35
·27491-27495
·
IF 3.84
Wei Tang,Ye Sun,Miao Yu,Xiao Liu,Yongqi Yin,Bin Yang,Limei Zheng,Feng Qin,Zhiguo Zhang,Wenwu Cao
Single-phase SrTiO3:mPr3+ (m = 0.01–0.1) nanoparticles have been synthesized by a hydrothermal method. Different from reported Pr3+-based phosphors which were all dominated by red emissions, considerably strong and overwhelming blue-green emission centered at 491 nm has been achieved together with minor green and red emissions. The absolute and relative intensities of these emissions can be modified by Pr3+ concentrations and annealing temperatures in a controlled manner, giving rise to varied emission colors. In particular, owing to the appropriate combination of the blue to red emissions, desirable white-light emission has been realized from the as-grown SrTiO3:0.01Pr3+ and the annealed SrTiO3:0.06Pr3+ samples at 350 °C with CIE chromaticity coordinates of (0.33, 0.35) and (0.35, 0.37) and a correlated color temperature of 5601 K and 4883 K, respectively, indicating the promising application potential of SrTiO3:Pr3+ as single-phase phosphors for white light-emitting-diodes. This work may provide a fresh route to acquire white emission from a single-composition phosphor.
研究领域:
材料科学
·
光子学
·
固态化学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yunni Liu,Qian Li,Zichao Lian,Jinchen Fan,Ying Tao,Guisheng Li,Hexing Li
Polarization field introduced photoelectrocatalytic system has been raised and applied for environmental purification and green fuel generation. Herein, we synthesized the Ag 2 O/TiO 2 nanotubes arrays (TNTs) p - n heterojunction photoanodes and innovatively introduced the SrTiO 3 (STO) as a relay to construct a highly stable PEC system. The SrTiO 3 layers with the ferroelectric properties were inserted in the interfaces between p-Ag 2 O and n-TiO 2 , creating a charge-stable polarized electric field thereby maintaining a constant driving force that promoted the effctive separation of electron and hole between SrTiO 3 and TNTs, and prevented the electron transfer from SrTiO 3 to Ag 2 O. Controlling suitable annealing and regulating hydrothermal time could induce SrTiO 3 spontaneous polarization, resulting in effective photoinduced charge separation. Consequently, the as-designed TNTs/STO/Ag 2 O photoanodes exhibited excellent PEC activity and stability (>40 h) for both persistent organic pollutants degradation and synergistic hydrogen evolution owing to the strengthened charge carrier capture ability of solar light and improved photocurrent density.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 27
·9771-9780
·
IF 8.307
Hang Yin,Ruishu Yang,Shuanhu Wang,Kexin Jin
Chemical doping is a dominating method for manipulating oxide two-dimensional electron gas (2DEG). However, enhancing the doping level while maintaining the metallic conduction remains a challenge, which limits detailed knowledge of 2DEG manipulation. Herein, we propose a concept of high-entropy heterointerface, which consists of a complex oxide (containing at least 5 elements) at either or both sides of the interface. By doubly doping Sr and Mn elements in the Nd and Al sites of NdAlO3, we grow Nd1−xSrxAl1−xMnxO3 (NSAMO) films onto SrTiO3 (STO) substrates to fabricate NSAMO/STO high-entropy heterointerfaces with different thicknesses (2–30 nm) and a wide range of doping ratios x (0.14–0.56). The 2DEG conducting behavior is maintained until x = 0.42, which is higher compared with similar studies. The varying x results in the coexistence of rich properties like a weak anti-localization (0.14–0.42), abnormal Hall effect (0.28 & 0.42), Lifshitz transition (0.42) and stable structure. These results confirm the potential of this strategy to tailor 2DEG in all-oxide interfaces.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Shan Chen,Yiping Zheng,Shijing Chen,Biao Huang,Xianzhao Tian,Yueqiu Gong
Dielectric capacitors are characterized by high power density, fast charge/discharge rates and long cycle life. However, their practical energy storage applications are severely limited by a high remnant polarization ( P r ) and an intrinsically low breakdown field strength ( E b ) To address these issues, SrTiO 3 /Bi x Ba(1- x )Zr 0.35 Ti 0.65 O 3 /SrTiO 3 (STO/B x BZT/STO) ( x = 0, 0.02, 0.04, 0.06) multilayer ferroelectric films, with SrTiO₃ (STO) as both buffer and capping layers, were fabricated via the sol-gel method. We found that appropriate Bi 3 + doping significantly promoted crystallization and simultaneously induced the formation of defect dipoles, resulting in a dense and uniform microstructure. Meanwhile the bilayer compressive stress from the STO interface layers optimized the domain structure, facilitating a faster response of the polar nanoregions to electric fields. These synergistic effects led to a higher maximum polarization and a lower P r . In particular, the STO/BBZT/STO-0.02 film exhibited excellent overall energy storage performance: under a E b of 4568 kV/cm, it achieved a high recoverable energy storage density ( W rec ) of 41.6 J/cm³ with an energy storage efficiency ( η ) of 71.36%. Notably, after 10 8 cycles of ferroelectric fatigue testing, the variation in W rec was only 8.15%, while maintaining an excellent efficiency ( η = 88.99%). The film also demonstrated good frequency stability (1∼10 kHz) and temperature stability (20∼120 °C). This synergistic optimization strategy holds great promise for providing a new approach to the development of next-generation high-performance dielectric capacitors.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jing Ding,Chenhui Qiu,Zhiqiang Zhang,Qinghua Qu,Cheng Fang,Jinfeng Zhang,Guofeng Guan,Hui Wan
Manipulating the oxidation states of transition metals is an ideal solution to achieve selective generation of different products and copper is widely used in CO 2 photocatalytic reduction to methanol. However, the understanding on the effects of valence states of copper species in SrTiO 3 on its structure and the selectivity of the corresponding product in CO 2 photocatalysis are currently still limited. Here, copper-doped SrTiO 3 nanofibers with different controllable ratios of Cu + /Cu 2+ and Cu + /Cu 0 were prepared by the combination of the electrospinning with the in-situ reduction method. The proportion of copper with different valence states (Cu + /Cu 2+ and Cu + /Cu 0 ) was changed by rationally adjusting the time of hydrogen reduction. The presence of monovalent copper facilitated the generation of reactive intermediates, thereby enhancing its photocatalytic activity. The copper-doped SrTiO 3 nanofibers obtained after 3 h of hydrogen reduction (STCu 0.08 -H-3 h) had the highest proportion of Cu + /Cu 2+ and Cu + /Cu 0 with the highest methanol yield (6.96 μmol·g −1 ·h −1 ). Methanol generation rate and Cu + /Cu 2+ ratio of STCu 0.08 -H-xh (x = 1, 2, 3, 4,5) with different hydrogen reduction time were proven to be linearly positively correlated. Furthermore, theoretical investigation and in-situ CO 2 infrared spectrum deeply understood the difference of CO 2 adsorption behavior and CO 2 activation over Cu 2+ and Cu + of STCu 0.08 -H-3 h photocatalyst and the reaction intermediates involved in the photocatalytic CO 2 reduction to methanol.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2758
·
IF 3.1
Guang Xian,Tongxin Zheng,Yaqiu Tao,Zhigang Pan
LaFeO3thin films were successfully epitaxially grown on single-crystalline SrTiO3substrates by the one-step hydrothermal method at a temperature of 320 °C in a 10 mol/L KOH aqueous solution using La(NO3)3and Fe(NO3)3as the raw materials. The growth of the films was consistent with the island growth mode. Scanning electronic microscopy, elemental mapping, and atomic force microscopy demonstrate that the LaFeO3thin films cover the SrTiO3substrate thoroughly. The film subjected to hydrothermal treatment for 4 h exhibits a relatively smooth surface, with an average surface roughness of 10.1 nm. X-ray diffraction in conventional Bragg–Brentano mode shows that the LaFeO3thin films show the same out-of-plane orientation as that of the substrate (i.e., (001)LaFeO3||(001)SrTiO3). The in-plane orientation of the films was analyzed by φ-scanning, revealing that the orientational relationship is [001]LaFeO3||[001]SrTiO3. The ω-rocking curve indicates that the prepared LaFeO3films are of high quality with no significant mosaic defects.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2014
·Vol. 4
·期 1
·5084
·
IF 5.078
Dong Lingqing,Luo Qi,Cheng Kui,Shi Hui,Wang Qi,Weng Wenjian,Han Wei-Qiang
Precisely controlling the protein-nanomaterial interactions at selective sites is crucial in engineering biomolecule composite architectures with tailored nanostructures and functions for a variety of biomedical applications. This strategy, however, is only beginning to be explored. Here, we demonstrate the facet-specific assembly of proteins, such as albumin, immunoglobulin and protamine, on {100} facets of SrTiO 3 polyhedral nanocrystals, while none on {110} facets. Molecular dynamics simulations indicate the immobile surface hydration layer might play a barrier role to effectively prevent proteins adsorption on specific {110} facets. This work thus provides new insights into the fundamentally understanding of protein-nanomaterial interactions and open a novel, general and facile route to control the selective adsorption of various proteins on various nanocrystals.
研究领域:
纳米材料
·
生物界面科学
·
蛋白质工程
·
表面化学
·
计算纳米科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Xu Xiang,Yi Zhu,Junding Zheng,Ying Li,Tao Zhang,Ju Gao,Hongfang Zhang
Harnessing contact electrification to drive redox reactions offers a promising, illumination-independent route for wastewater remediation. However, the interfacial mechanisms governing tribocatalytic efficiency remain unclear. Here, Nb-doped SrTiO₃ (0.25–2 mol %) was systematically investigated under Tribo-, Light-, Dark-, and combined Tribo-Light conditions to elucidate the role of electronic structure and field screening on performance. Mott–Schottky and Kelvin probe force microscopy (KPFM) analyses reveal that increasing Nb content raises the Fermi level and compresses the Debye screening length (λ D ) from ≈ 6 nm (0.25 % Nb) to ≈ 4.5 nm (2 % Nb). EIS confirms this shortening through reduced space-charge resistance, while zeta-potential measurements show consistently moderate negative values (≈ –25 to –30 mV), excluding adsorbed species as the dominant factor. An optimal λ D window of 5.5–6.0 nm at 0.25–0.5 % Nb balances donor concentration and interfacial field penetration, enabling efficient electron extraction and radical generation. Consequently, 0.25 % Nb–SrTiO₃ achieves 90 % RhB degradation in 24 h (Tribo-only) and complete MB removal within 2 h (Tribo-Light), whereas 2 % Nb over-screens the surface field and suppresses reactivity. These findings identify the Debye length as a quantitative descriptor for tribocatalytic design, providing a mechanistic basis for engineering high-efficiency, bias-free catalysts for environmental remediation.
研究领域:
材料科学
·
催化
·
环境工程
·
表面科学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
H. Yu,C. Sun,Y. Xuan,K. Zhang,K. Chang
Photocatalytic carbon dioxide (CO 2 ) reduction to valuable chemicals (ethanol) is an ideal way to realize artificial photosynthesis. It is still extremely difficult to achieve the challenge for photocatalytic CO 2 reduction to multi-electronic products (C 2 H 5 OH). Here, we design the SrTiO 3 (La Cr)/Cu @ Ni/TiN (STO/Cu @ Ni/TiN) to realize the high efficiency of photocatalytic CO 2 reduction conversion into ethanol in the absence of sacrificial reagents. Furthermore, we use non-noble metallic materials such as Cu, Ni, and TiN to enhance the plasmonic effect for efficiently capturing solar full-spectrum energy instead of noble metals. Meanwhile, the TPD results show that Cu@Ni nanoparticles can enhance the chemical adsorption of CO 2 molecules. STO/Cu @ Ni/TiN exhibit an optimal ethanol evolution rate of 21.3 μmol/(h·g cat. ) and the ethanol selectivity of 79%, which is the highest value for photocatalytic CO 2 reduction to ethanol, among the best values of our knowledge. Furthermore, the pathway of ethanol is confirmed by density functional theory (DFT) calculations and the 13 C isotope experiment.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Junlei Qi,Minghe Cao,Yiying Chen,Ying Fang,Wengao Pan,Hua Hao,Zhonghua Yao,Zhiyong Yu,Hanxing Liu
The effects of sintering temperature on microstructure and dielectric properties of Ce doped SrTiO 3 were investigated. The dielectric properties are strongly depend on sintering temperature, the sample sintered at 1520 °C exhibits a colossal permittivity about 7000 at 1 kHz while relative permittivity of the sample sintered at 1380 °C is 770. Further investigations demonstrate that all the samples belong to P m 3 ¯ m space group and without secondary phase. The lattice parameter decrease with the increase of sintering temperature while the mean grain size of SCT (Sr 0.985 Ce 0.01 TiO 3 ) ceramics are increased. Higher sintering temperature helps to improve the dielectric properties which can be attribute to defect clusters (e.g. oxygen vacancies , Ti 3+ /Ti 4+ etc.), however the defects are more likely to become carriers in high electric field which can increase the conductivity and leakage current. With the increase of sintering temperature, the conductivity activation energies , breakdown strength and energy storage density of the samples are decreased.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）