Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 46
·23388-23395
·
IF 9.931
Qihao Sun,Yadong Xu,Hongjian Zhang,Bao Xiao,Xin Liu,Jiangpeng Dong,Yuanbo Cheng,Binbin Zhang,Wanqi Jie,Mercouri G. Kanatzidis
The halide perovskitoid compound Cs3Bi2I9 (CBI) has attracted considerable interest as a semiconductor because of its outstanding stability and reduced toxicity compared with lead-based halide perovskites. Here, we report the growth of nuclear radiation detection grade CBI bulk crystals (Φ 15 × 60 mm3) with a high resistivity of over 1010 Ω cm using a modified vertical Bridgman method. Because of their layered crystal structures we investigated the anisotropy in the optical and electrical properties using different crystal orientations. The CBI(001) sample exhibits a resistivity of ∼1012 Ω cm compared to ∼1010 Ω cm for the CBI(100) sample. This is due to the anisotropic mobility in the two crystallographic directions. Using 425 nm LED (∼200 mW cm−2) illumination CBI(001) possesses a superior optical response with a switching ratio of over 40, which is critically higher than that of CBI(100) (<2). Detectors of 2 mm thickness show a capability of detecting 241Am@5.49 MeV α particles, with good peak discrimination. A full width at half maximum (FWHM) of 32% was obtained under a bias of 560 V. Simultaneously, the electron mobility and mobility lifetime (μτ) were calculated to be 6.10 cm2 V−1 s−1 and 2.03 × 10−5 cm V−1, respectively. First-principles density functional theory calculations confirm the crystallographic anisotropy of the carrier effective masses. In addition, a significant X-ray sensitivity of 111.9 μC Gy−1 cm−2 for a CBI detector was observed, under 80 kVp X-rays at an electrical field of 450 V cm−1.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 21
·6253-6261
·
IF 7
Hongshan Wang,Xueting Pan,Wang Zhao,Yu Chu,Junjie Li
Developing high-performance infrared (IR) nonlinear optical (NLO) materials is essential for modern laser technology, but challenging due to the competition of the NLO coefficient and band gap in the structure. Based on the “electronic structure engineering bucket effect” and systematic experimental investigations on the AIIBIICIVD4VI family, three new alkaline earth metal sulfides Mg0.6Cd1.4GeS4, CaCdGeS4, and BaZnGeS4 have been developed. The compounds show a structural change from the Pnma (CaCdGeS4) to the Fdd2 (BaZnGeS4) space group. Among them, BaZnGeS4 exhibits a phase-matching NLO response of ∼0.8× AGS, a wide band gap of 3.36 eV, and a high laser-induced damage threshold of ∼5.4× AGS, achieving a good balance between the NLO response and band gap, which makes it an excellent IR NLO material. Theoretical calculations show that the NLO effects of BaZnGeS4 originated from the [ZnS4] and [GeS4] NLO-active motifs. The results indicate that BaZnGeS4 is a promising anti-laser damage IR NLO material and enriches the chemical diversity of the AIIBIICIVD4VI family.
研究领域:
材料科学
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光学工程
·
固体物理
✓ 已验证
DOI
高影响因子
SENSORS
·
2019
·Vol. 19
·期 19
·4223
·
IF 3.031
Weiming Ji,Zumei Zhu,Shunni Dong,Jingjing Nie,Binyang Du
A highly selective and sensitive optical sensor was developed to colorimetric detect trace Fe3+ions in aqueous solution. The sensor was the sulfasalazine (SSZ) functionalized microgels (SSZ-MGs), which were fabricated via in-situ quaternization reaction. The obtained SSZ-MGs had hydrodynamic radius of about 259 ± 24 nm with uniform size distribution at 25 °C. The SSZ-MG aqueous suspensions can selectively and sensitively response to Fe3+ions in aqueous solution at 25 °C and pH of 5.6, which can be quantified by UV-visible spectroscopy and also easily distinguished by the naked eye. Job’s plot indicated that the molar binding ratio of SSZ moiety in SSZ-MGs to Fe3+was close to 1:1 with an apparent association constant of 1.72 × 104M−1. A linear range of 0–12 μM with the detection limit of 0.110 μM (0.006 mg/L) was found. The obtained detection limit was much lower than the maximum allowance level of Fe3+ions in drinking water (0.3 mg/L) regulated by the Environmental Protection Agency (EPA) of the United States. The existence of 19 other species of metal ions, namely, Ag+, Li+, Na+, K+, Ca2+, Ba2+, Cu2+, Ni2+, Mn2+, Pb2+, Zn2+, Cd2+, Co2+, Cr3+, Yb3+, La3+, Gd3+, Ce3+, and Bi3+, did not interfere with the detection of Fe3+ions.Keywords:functional microgels;sulfasalazine;Fe3+detection;optical response
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2019
·
IF 6.019
Ya-Nan Zhang,Bo Li,Lin Fu,Yong Zou,Qun Li,Long-Wei Yin
An original CsPbI x Br 3-x /FAPbI y Br 3-y absorber is designed to form C 60 /CsPbI x Br 3-x /FAPbI y Br 3-y multi-heterojunction perovskite solar cells with optimized energy band alignment by precisely adjusting I:Br proportion in these two perovskite absorbers. The introduction of CsPbI x Br 3-x can not only improve the optical response, but also act as an electron transport conductor to form a band-matched cascade electron extractor with C 60 . Optimized optical response and well-matched energy levels greatly enhance carrier transport and reduce carrier recombination, affording a high PCE of 17.48%, with high V OC , J SC , FF and excellent device stability simultaneously. Our results shed light on the importance of the interface engineering on the electron excitation and extraction of perovskite layers and describe an innovative approach to further boost the efficiency of perovskite solar cells.
研究领域:
材料科学
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光伏技术
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2018
·
IF 2.207
Yumin Leng,Chunhua Ma,Wentai Zhang,Kecheng Liu,Zhiwen Lu
The chemical elements of proteins are similar to that of DNA (e.g., C, H, O, and N), and DNA shows different knotted architectures. So we imagine that proteins may show a wealth of highly complex structures, especially when proteins interact with each other. The imagination was proved by synthesizing gold nanoparticles (GNPs) to capture the lifelike protein structures. The optical responses (i.e., color) of as-prepared GNPs are found to be characteristic to a given protein (or heavy metal ion). Based on the “three colors” principle of Thomas Young, we extracted the red, green, and blue (RGB) alterations of as-synthesized GNPs to fabricate multichannel sensor arrays for proteins (or heavy metal ions) discrimination. The designed multichannel sensor arrays demonstrate possibilities in semiquantitative analysis of multiple analytes (e.g., proteins and heavy metal ions). This work is believed to open new opportunities for GNPs-based label-free sensing.
研究领域:
生物化学
·
纳米技术
·
传感技术
✓ 已验证
DOI
高影响因子
Advanced Science
·
2019
·Vol. 6
·期 17
·1901096
·
IF 15.804
Shaofei Wen,Yunpeng Wang,Bijiao Lan,Weida Zhang,Zhuo Shi,Shichao Lv,Yujun Zhao,Jianrong Qiu,Shifeng Zhou
Transparent nanoceramics embedded with highly dense crystalline domains are promising for applications in missile guidance, infrared night vision, and laser and nuclear radiation detection. Unfortunately, current nanoceramics are strictly constrained by the stringent construction procedures such as super-high pressure and containerless processing. Here, a pressureless crystallization engineering strategy in glass for elaboration of transparent nanoceramics and fibers is proposed and experimentally demonstrated. By intentional creation of a sharp contrast between nucleation and growth rates, the crystal growth rate during glass crystallization can be significantly suppressed. Importantly, this unique phase-transition habit enables the achievement of transparent nanoceramics and even smooth fibers with extremely tiny crystalline size (≈20 nm) and high crystallinity (≈97%) under atmospheric pressure. This allows the generation of an attractive nonlinear optical response such as dynamic optical filtering and luminescence in the mid-infrared waveband of 4300–4950 nm. These findings highlight that the strategy to switch the phase-transition habit of glass into the unconventional crystallization regime may provide new opportunities for the creation of next-generation nanoceramics and fibers.
研究领域:
材料科学
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无机非金属材料
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光学功能材料
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纳米陶瓷
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玻璃物理
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2013
·Vol. 25
·期 32
·4397-4402
·
IF 14.829
Yunlong Liu,Chunfeng Zhang,Huichao Zhang,Rui Wang,Zheng Hua,Xiaoyong Wang,Jiayu Zhang,Min Xiao
Graphical Benefiting from excitonic charge-transfer states, an efficient non-linear optical response is observed in type-II nanocrystals by four-wave mixing when the incident photon energy lies below the bandgaps of constituent semiconductors. The non-linear optical properties in nanocrystals can be manipulated by the band alignment of the core–shell components, which serves as a promising platform to design broadband non-linear optical devices.
研究领域:
纳米光子学
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材料科学
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凝聚态物理
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光学工程
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半导体物理学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
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2022
·Vol. 40
·期 20
·2407-2414
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IF 5.56
Jia-Nuo Li,Xiao-Hui Li,Ying-Xuan Xu,Wenlong Liu,Sheng-Ping Guo
Comprehensive Summary Oxychalcogenides have been drawn much attention to be explored as nonlinear optical (NLO) materials in recent years. To date, all the NLO oxychalcogenides crystallize in low dimensional structures. Herein, a new oxysulfide K 2 Ba 0.5 Ga 9 O 2 S 13 was obtained via three-dimensional (3D) {[Ga 9 O 2 S 13 ] 3– } ∞ polyanionic framework. As the first oxychalcogenide with 3D NLO-acitve polyanionic framework, K 2 Ba 0.5 Ga 9 O 2 S 13 has a wide band gap of 3.72 eV, and exhibits a high laser-induced damage threshold (LIDT, 17 × AgGaS 2 ). It presents moderate phase-matchable NLO response of 0.5 × AgGaS 2 at 2.1 μm and 2 × KH 2 PO 4 at 1.064 μm. The theoretical calculation results indicate that the NLO response is mainly contributed from [Ga(2)S 4 ] unit-built [Ga(2) 3 S 10 ] windmill-like motif. This work may stimulate the exploration of more NLO oxychalcogenides with balanced performances.
研究领域:
材料科学
·
光学
·
无机化学
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Yan Guo,Bin-Wen Liu,Chao-Hong Xie,Wen-Fa Chen,Ming-Xin Li,Xiao-Ming Jiang,Guo-Cong Guo
Rare-earth infrared nonlinear optical (IR NLO) compounds have garnered significant attention due to their abundant electronic structures. However, their NLO efficiency has been relatively modest, attributed to the localization of valence electron shells in rare-earth metals. Traditional design strategies for IR NLO materials have predominantly focused on MQ4 (M = metal, Q = S or Se) tetrahedra, with limited exploration of MQ6 octahedra. We introduce a novel approach to enhance NLO effects by incorporating distorted mixed anionic octahedral M(S/X)6 groups. To illustrate this strategy, we undertake structure modification and optimization of IR NLO performance using the Y–Ga–Ge–S system as an example. The synthesis of a new rare-earth chalcogenide, Y6Ga2GeS14 (1), serves as a foundation. Further halogen atom substitution yields Y6Ga4.2S13.6Cl3.4 (2), Y6Ga2.83Ge2S16.75Cl (3), and Y6Ga2.83Ge2S16.5Br1.5 (4). All compounds demonstrate remarkable NLO performance, including moderate NLO coefficients (0.17–0.70 × AgGaS2), large laser-induced damage thresholds (LIDTs) (3.78–6.19 × AgGaS2), and a broader transmission range (0.5–14.9 μm). The incremental enhancement of NLO efficiency in compounds 1–4 can be attributed to symmetry breaking induced by halogen atom substitution and increased distortion of the octahedral M(S/X)6 motifs in their structures, validating the effectiveness of our strategy. Notably, this strategy concurrently increases the band gap and LIDT, overcoming the NLO–LIDT incompatibility, being strikingly different from other reported approaches. This work provides new insights into optimizing the NLO performance of rare-earth IR NLO compounds through the modulation of octahedral motifs.
研究领域:
材料科学
·
光学
·
化学
·
物理学
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2022
·Vol. 259
·期 7
·2100543
·
IF 1.782
Jing Zhang,Yuqing Cao,Chen Chen,Qiang Wang,Yabin Shao
2D black phosphorus nanosheets (BPNSs) are prepared by the ultrasonic-assisted liquid phase stripping method, which improves the preparation yield and monodispersity of the thin-layer BPNSs. Open-aperture Z-scan measurement by nanosecond pulsed laser with low repetition rate (10 Hz) is used to reduce the existence and accumulation of heat accumulation effect. BPNSs have strong saturated absorption in the wideband visible light range from 475 to 625 nm; and with the increase of laser energy, reverse saturated absorption (RSA) occurs at some specific wavelengths in this range. The reverse saturation absorption is observed at 500 nm; and the stronger the excited state absorption is with the increase of laser energy, the more obvious the reverse saturation absorption is. At 525 nm, as the laser excitation energy increases from 750 to 1080 μJ, a transition from saturated absorption to anti-saturated absorption is observed. This shows that laser excitation energy is an important factor in the transition from saturated absorption to anti-saturated absorption. That is to say, by controlling the laser excitation energy and wavelength, BPNSs can have different application values in the field of nonlinear optics, such as saturable absorbers, optical limiters, and optical switches.
研究领域:
材料科学
·
光学
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Rumin Ma,Jingpeng Li,Shenjie Han,Zaixing Wu,Yongjie Bao,Sheng He,Yuhe Chen
In this study, different morphologies of WO 3 ⋅H 2 O/TiO 2 (WT) heterojunction films were successfully synthesized on bamboo biotemplate via facile two-step hydrothermal deposition methods. The WO 3 ·H 2 O self-assembled by nanosheets or nanoplates on anatase TiO 2 -coated bamboo (TiO 2 -B) exhibited a distinctive surface color. The addition of WO 3 ·H 2 O could significantly extend the optical responses of TiO 2 -B in the ultraviolet to the visible region. Based on the various analysis techniques, the formation mechanisms of the WO 3 ·H 2 O hierarchical architectures with different crystal structures were also proposed. In addition, the photoactivity and post illumination activity of WT films were examined by constructing ·O 2 ˉ and ·OH in light and in light-off, respectively. The results showed that WT films with different crystal structures exhibited different photoactivity and energy storage abilities, and the photoactivity of WT films was negatively correlated with their energy storage ability. The presence of an anatase TiO 2 thin film on the bamboo surface provided abundant active sites for WO 3 ·H 2 O growth, which formed direct S-scheme heterojunctions for solar energy conversion and storage. Therefore, we anticipate that solar-driven energy storage heterojunctions with accessible and rich crystal morphologies will provide new insights for various applications, such as efficient wastewater treatment , self-cleaning coating, and air purification.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
能量存储
·
光化学
✓ 已验证
DOI
高影响因子
Device
·
2023
·
IF 0
Zheng Wang,Qilin Li,Peng Cao,Jiao Zhang,Di Wu,Rengui Xu,Yan Zhang,Yunruo Xu,Tao Liang,Wei Chen,Lin Wang,Xiaoyuan Chen
Summary The high incidence of chronic intestinal diseases and the significant influence of intestinal disorders on overall health prompt us to optimize and innovate therapeutic strategies, especially those involving ingestible dosage forms. However, the clinical translation of these strategies is challenged by a lack of precise spatiotemporal controllability, readily inducing off-target effects. Herein, we develop a biomimetic helical robot (BHR) that enables targeted cargo transport and localized prodrug activation within the gastrointestinal (GI) tract by systemically integrating magnetic and optical responsiveness. Under magnetic guidance, a bioinspired structure facilitates the travel of BHR through the morphologically and biochemically complicated GI tract. Further, BHR, with its two different compartments individually loaded with a prodrug and the corresponding drug activator, achieves near-infrared (NIR)-triggered drug release and in situ prodrug activation, consequently generating anti-inflammatory and biosafe effects at molecular, cellular, and whole-animal levels. Collectively, BHR as a promising ingestible medical system transforms intestinal pharmacotherapy to be more convenient, effective, and intelligent.
研究领域:
生物医学工程
·
药物递送
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光学响应
·
磁响应
·
胃肠治疗
✓ 已验证
DOI
危险品化学品经营许可证（带存储）