Frontiers in Chemistry
·
2022
·
IF 5.545
Wu Jinming,Zhang Yongqiang,Yang Shuang,Chen Zhaolai,Zhu Wei
Metal halide perovskite single-crystal detectors have attracted increasing attention due to the advantages of low noise, high sensitivity, and fast response. However, the narrow photoresponse range of widely investigated lead-based perovskite single crystals limit their application in near-infrared (NIR) detection. In this work, tin (Sn) is incorporated into methylammonium lead iodide (MAPbI3) single crystals to extend the absorption range to around 950 nm. Using a space-confined strategy, MAPb0.5Sn0.5I3 single-crystal thin films with a thickness of 15 μm is obtained, which is applied for sensitive NIR detection. The as-fabricated detectors show a responsivity of 0.514 A/W and a specific detectivity of 1.4974×1011 cmHz1/2/W under 905 nm light illumination and –1V. Moreover, the NIR detectors exhibit good operational stability (∼30000 s), which can be attributed to the low trap density and good stability of perovskite single crystals. This work demonstrates an effective way for sensitive NIR detection.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiaxin Wu,Wenfei Ai,Kai Hou,Chaofan Zhang,Yue Long,Kai Song
Many organisms rely on a dynamic attachment mechanism to climb surfaces. Inspired by these organisms, researchers have developed soft climbing robots. Despite their rapid development in recent times, such robots have restricted application in complex environments, such as the lack of remote wireless actuation and attachment ability for climbing tilted or slippery surfaces. To address these issues, we report a light-driven dynamic adsorption/desorption soft suction cup inspired by rock-climbing fish ( Beaufortia kweichowensis ). Our suction cups utilize the volumetric change caused by changes in the gas–liquid phase in the inner chamber to generate suction and thrust. The repetitive changes in the gas–liquid phase, controlled by photothermal conversion, help achieve adsorption and desorption. We demonstrated that the suction cups based on negative pressure adsorption can easily help miniaturize soft robotic devices and adapt to multiple types of substrates, making our approach applicable to tilted or slippery surfaces. By integrating the soft suction cups for surface attachment by dynamic control and a shape memory alloy as a deformable body, we developed a soft climbing robot that can perform precise, facile, and programmed controlled climbing under different conditions via remote light manipulation. Four continuous and directional climbing sequences on tilted and slippery surfaces were demonstrated. The results are expected to help advance the application of light-driven soft robots on tilted or slippery surfaces
研究领域:
机器人学
·
仿生工程
·
智能材料
·
微纳系统
·
生物医学工程
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 32
·2401539
·
IF 8
Qianjin Wang,Zhilin Xiang,Peizhi Yang,Yingkai Liu,Qiuhong Tan
Metal halide perovskites recently have emerged as a promising candidate for photodetection due to their exceptional photoelectric performance. However, the high dark current in these materials has hindered their practical application to imaging. In this study, a novel halogen-mixed CsPbIBr 2 microwire photodetector that has a remarkable reduction of dark current by over 100-fold (compared to CsPbBr 3 ), along with a substantial increase in photocurrent, which yields a significantly improved on/off ratio of 6.56 × 10 4 , is developed. More importantly, the halogen-mixed perovskite photodetector exhibits enhanced photodetection performance, including a high responsivity of 133 A W −1 and a remarkable specific detectivity of 4.02 × 10 12 Jones even under ultraweak light conditions as low as 4.5 nW cm −2 . More specifically, high-resolution images are successfully obtained under ultraweak light conditions. The combined analysis of experimental results and first-principles calculation attribute the excellent performance of the CsPbIBr₂ microwire photodetector to a significant reduction in dark current by suppressing ion migration and increasing carrier effective mass, and a remarkable increase in photocurrent resulting from reduced bandgap and enhanced light absorption, as compared to CsPbBr 3 . This research represents a significant advancement in the development of high-performance 1D perovskite-based photodetectors, with promising implications for ultra-weak light imaging applications.
研究领域:
光电子学
·
材料科学
·
纳米器件
·
半导体物理
·
生物医学成像
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2018
·
IF 3.886
Lipeng Wan,Feng-Qiang Xiong,Bingxue Zhang,Ruxin Che,Yue Li,Minghui Yang
LaNbON 2 has narrow bandgap and wide visible-light absorption band, yet no photocatalytic water oxidation on LaNbON 2 has been reported. By a post-annealing treatment in Ar, anion vacancies were brought into LaNbON 2 as shown by EPR spectroscopy. These could act as donors in the semiconductor. And consequently the oxidative power of holes was enhanced as indicated by the difference between fermi level and valence band maximum ( E F - E VBM ) evaluated from valence band XPS . The annealed LaNbON 2 photocatalyst acquired water oxidation ability for the first time, which was improved by combining CoO x as cocatalyst . Annealed LaNbON 2 derived from La 3 NbO 7 had smaller particle size, higher concentration of anion vacancies, bigger E F - E VBM and better performance for photocatalytic oxygen evolution reaction than LaNbON 2 derived from LaNbO 4 .
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Yantong Lu,Guangshe Li,Sixian Fu,Shaofan Fang,Liping Li
CsCu2I3 mixed with Cs3Cu2I5 has shown potential applications as white-light-emitting materials, while their growth, structural evolution behaviors, and their impact on photoluminescence of CsCu2I3 nanocrystals (NCs) are still not known. In this work, we investigated the growth and structural evolution of CsCu2I3 nanocrystals with increasing reaction temperature. At low temperature and in the presence of a high dosage of oleic acid and oleylamine, Cs3Cu2I5 nanoparticles, rather than CsCu2I3 NCs, preferred to form in the hot-injection reaction system. Increasing the reaction temperature promoted the formation of CsCu2I3 nanorods. Phase-pure CsCu2I3 nanorods were steadily obtained at 180 °C. Structural evolution from less copper-containing NCs to copper-rich ones in the low-temperature reaction condition is highly related to the coordination of copper ions with OAm. More importantly, accompanying the growth of nanorods and structural evolution from Cu3Cs2I5 to CsCu2I3, the color of photoluminescence emission of NCs changed from blue to nearly white and to yellow, but their photoluminescence quantum yield decreased from 36.00 to 9.86%. The finding in this work would give a view to the structural evolution of copper-containing perovskite-like halides, being helpful for adjusting their photoluminescence in white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2024
·
IF 6.8
Zhuang Ma,Boxuan Hou,Anhui Liao,Ying Tan,Chunyan Tan,Yuyang Jiang
Overuse of antibiotics and the widespread environmental accumulation of antibiotics drive the evolution and spread of antimicrobial resistance, posing a significant global health threat by reducing the effectiveness of available treatments and increasing the risk of untreatable infections. We designed and synthesized PhoPS, a novel photocaged β-lactamase inhibitor, which incorporates the pharmacophore of sulbactam caged with a photoresponsive moiety of o-nitrobiphenyl derivative. Experimental results demonstrate its rapid photoactivation, good stability in solution, and light-activated β-lactamase inhibition in vitro. PhoPS displays synergy with a cephalosporin antibiotic cefoperazone against both susceptible and resistant strains of Escherichia coli and biofilm formation. Additionally, PhoPS treatment demonstrates the potential to suppress the development of resistance in E. coli. These findings suggest that PhoPS offers a promising approach for restoring the efficacy of existing antibiotics and mitigating the emergence of AMR.
研究领域:
微生物学
·
药学
·
生物技术
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2024
·
IF 2.7
Fengxia Yang,Zhilu Zhang,Zhengjun Luo,Xiaofei Dong,Lin Ge,Yan Li
Developing memristors with both light-regulated resistive switching characteristic and optronic synaptic behavior is of great significance for next-generation artificial visual applications. Herein, Cu 2 ZnSn(S,Se) 4 (CZTSSe)-based synaptic memristor is designed and its visible light-modulated resistive switching characteristics, especially the photonic synaptic behaviors, are detailedly investigated. For such Ag/CZTSSe/Mo memristor, not only its Set/Reset switching voltage and R HRS /R LRS ratio can be well regulated by visible light, either the wavelength (470 ∼ 655 nm) or intensity (40 ∼ 110 mW/cm 2 ), but also its photonic synaptic behavior like “learning-forgetting” can be achieved and modulated by light stimuli. The results are of significance for designing artificial photonic synaptic devices in neuromorphic vision application.
研究领域:
神经形态工程
·
光电子学
·
忆阻器件
·
人工突触
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2019
·Vol. 33
·期 4
·e4648
·
IF 3.259
Zi-Feng Yao,Zhen-Xiang Dai,Zhan-Jun Zhang,Gan-Hong Zheng,Xin Xu
Mn-doped SrMoO 4 nanocrystals were synthesized by thermal decomposition of metal–organic salt in an organic solvent with the doping content in the range 0–12 mol%. The structures, morphologies and optical properties were characterized using various techniques. The results suggest that Mo sites in the SrMoO 4 lattice are substituted by the Mn dopant, the adsorption bands are found to be shifted toward the visible light region and the band gap becomes narrower correspondingly. The photocatalytic performance of the as-synthesized product was determined using the degradation of methylene blue by visible light irradiation. The photocatalytic performance is enhanced with Mn doping, and the optimal degradation rate is 85% in 140 min for 5 mol% Mn doping. The enhanced photocatalytic activity with Mn doping may be ascribed to the energy band adjustment and effective photogenerated electron–hole separation caused by the Mn doping. A possible photocatalytic mechanism is also discussed.
研究领域:
材料科学
·
光催化
·
纳米技术
·
环境化学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 9
·2102496
·
IF 10.05
Huanxin Yang,Weiren Zhao,Enhai Song,Kaige Hu,Hongshi Zhang,Rui Yun,Hao Huang,Jiyou Zhong,Yang Li,Xiyan Li
Persistent phosphor, as an eco-friendly energy storage material, usually needs high-energy photonic rays in the storage process, such as ultraviolet (UV) light, X-ray, or even γ-ray. This strict requirement for light source which is harmful to human health greatly limits the popularity of persistent phosphors in the daily life. Here, a novel broadband orange persistent emissive phosphor LiGaO 2 :1%Mn 2+ (LGOM) is reported which supports efficient wide band excitation from UV to green light. The afterglow excited by 470 nm light even reaches ≈80% as intensity as UV excitation. The afterglow of LGOM excited by common blue lamp (450–460 nm) can be pictured by the smart phones for more than 48 h. The mechanism of visible light storage is discussed through the thermal-luminescence measurements. In addition, interestingly, its persistent emissive color can shift from orange-yellow to orange-red after ceasing the excitation source. This unique broadband orange afterglow phosphor which supports efficient wide range visible-light excitation, afterglow color shift, and long-lasting luminescence is expected to have potential applications in the fields of emergency direction, anticounterfeiting, decoration design, etc.
研究领域:
材料科学
·
光子学
·
发光材料
·
能量存储
·
固态化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xuemin Geng,Peng Yang,Yanfen Wan
Interfacial solar evaporators designed with sophisticated 3D structure hold the potentiality for ameliorating the evaporation rate through expanding the surface area for evaporation, facilitating water movement and bolstering air convection. However, the most current 3D evaporators are stalemated of constrained light absorption, circumscribed evaporative surface or thermal dissipation which collectively result in the curtailment of evaporation rate escalation. In this work, an omnibearing convergence of new cup-like 3D solar steam generator (C-3D SSG) based on MoS 2 /C and PVA materials with integrated coordination of light-space-heat is constructed. The innovative cup-like structural design of C-3D SSG successfully embodies the convergence of light, space and heat management through the strategic integration of photothermal materials (PTM), substrate materials and evaporative elements across multiple scales, demonstrating a compelling advancement in light absorption, copious heat diffusion space and prodigious energy-harvesting zone and water evaporation rate enhancement. The omnibearing regulation attains a premium evaporation rate of 3.89 kg m -2 h −1 under 1 Sun illumination with recycle energy of 1.71 W. By incorporating the C-3D SSG for practical application, it can function as an evaporator within a cup, thereby enhancing its practical utility. And C-3D SSG with panoramic convergence provides a broad range of research avenues and methodologies for addressing the water crisis and the development of ISSG technology.
研究领域:
材料科学
·
太阳能
·
环境工程
·
水资源管理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Manufacturing Processes
·
2024
·
IF 6.1
Dexing Zhu,Jian Zhang,Qiao Xu,Yaguo Li
3D printing is capable of fabricating glass components with complex shapes that are challenging for traditional processing techniques. Here, we describe a paradigm of 3D printing of centimeter-sized glass aspheric lenses by Digital Light Processing (DLP). The printed lenses were post-processed using spin coating technique to reduce the layered structures. Our process involved the use of a glass slurry composed of UV-curable resins and silica nanoparticles, with the printed part undergoing thermal debinding and sintering to achieve transparency. The glass slurry exhibited significantly higher viscosities near the solid-liquid interface, which can result in a resin tray failure when applying a layer thickness below 50 μm in the DLP process. The printed lens exhibited a smooth surface with RMS < 15 nm, a surface profile deviation <170 μm and an imaging resolution of 45.3lp/mm.
研究领域:
材料科学
·
光学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Yan Yan,Xinlin Liu,Weiqiang Fan,Peng Lv,Weidong Shi
New types of visible-light-driven semiconductor photocatalysts for the applications of environmental improvement and solar energy conversion have received much attention. In this study, a novel visible-light-driven InVO 4 photocatalyst was successfully synthesized by a facile additive-free hydrothermal method. The product is 3D spheric structure and well-crystallized. Pt loading plays a key role in this system. Pt nanocrystals on the particle surface not only act as charge collectors and transporters but also produce much more active sites. The Pt–InVO 4 photocatalyst exhibited excellent visible-light-driven photocatalytic activity that reach the ciprofloxacin (CIP) degradation ratio of 98.2% and H 2 production rate of 9.76 μmol h −1 g −1 with methanol as the sacrifice reagent.
研究领域:
材料科学
·
环境科学
·
太阳能转换
✓ 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）