DEFECT AND DIFFUSION FORUM
·
2024
·
IF 0
Aorigele Bohnuud,Gerile Naren,Zi Hao Qiu,Rui Meng,Ojiyed Tegus
Amino acid lanthanide complexes are a promising class of environmentally friendly and non-toxic optical organic materials that find extensive applications in biomedicine, molecular probes, and optical devices. In this study, three amino acid lanthanide complexes, octanoyl glycine gadolinium (Gd(oct-ala)3×H2O), octanoyl serine gadolinium (Gd(oct-ser)3×H2O), and octanoyl phenylalanine gadolinium (Gd(oct-phe)3×H2O), were synthesized by reacting octanoyl amino acid ligands with gadolinium chloride. The coordination structure of the gadolinium complexes was determined by elemental analysis and infrared spectroscopy. XRD and polarized light microscopy confirmed the amorphous structure of the complexes. DSC and TG-DTA were used to investigate the thermodynamic stability of the gadolinium complexes, and their solubility and UV-visible light absorption properties were also evaluated. Our results demonstrate that all three gadolinium complexes exhibit excellent UV-visible light absorption performance, with the Gd(oct-phe)3×H2O containing a phenyl ring showing the highest light absorption efficiency.
研究领域:
材料科学
·
生物医学
·
光学
✓ 已验证
DOI
ACS Nano
·
2018
·
IF 13.709
Jian Mao,Hong Lin,Fei Ye,Minchao Qin,Jeffrey M. Burkhartsmeyer,Hong Zhang,Xinhui Lu,Kam Sing Wong,Wallace C. H. Choy
We demonstrate all-perovskite light-emitting diodes (PeLEDs) with white emission on the basis of simultaneously solving a couple of issues including the ion exchanges between different perovskites, solvent incompatibility in the solution process of stacking different perovskites and carrier transport layers, as well as the energy level matching between each layer in the whole device. The PeLEDs are built with a two-dimensional (CH3CH2CH2NH3)2CsPb2I7 perovskite that emits red light, CsPb(Br,Cl)3 quantum dots that emit a cyan color, and an interlayer composed of bis(1-phenyl-1H-benzo[d]imidazole)phenylphosphine oxide (BIPO) and poly(4-butylphenyl-diphenyl-amine) (Poly-TPD). The interlayer is designed to realize desirable white electroluminescence by tuning the electron and hole transportation and distribution in-between multilayers. With this PeLED configuration, we achieve the typical white light with chromaticity coordinates of (0.32, 0.32) in Commission Internationale de L’Eclairage (CIE) 1931 color space diagram and steady CIE coordinates in a wide range of driving current densities (from 2.94 to 59.29 mA/cm2). Consequently, our work, as the starting point for future research of all-perovskite white PeLEDs, will contribute to the future applications of PeLEDs in lighting and display. In addition, we believe that the proposed material and all-perovskite concept will leverage the design and development of more perovskite-based devices.
研究领域:
材料科学
·
光电工程
✓ 已验证
DOI
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
Xia Guo,Hongwei Liao,Jiaming Tian,Chuang Yang,Fan Xia,Wenshi Liang,Nan Wang,Pin Li,Bo Zhang,Linji Gong,Xi Hu,Liang Zhang,Fangyuan Li,Daishun Ling
Summary Singlet oxygen ( 1 O 2 ) is extensively employed by reactive oxygen species (ROS)-based cancer therapies, such as photodynamic therapy (PDT) and chemodynamic therapy (CDT). However, the dependences of PDT on light and CDT on complex chemodynamic reactions greatly limit their 1 O 2 -generating efficiencies. Here, we exploit strain and electronic effects to fabricate a bimetallic nanocatalyst by coating a gold nanorod (AuNR) with ~2 platinum (Pt) atomic layers (AuPt 0.09 ), which efficiently generates 1 O 2 from ground-state oxygen ( 3 O 2 ) by electron-transfer-mediated spin reduction. Density functional theory reveals strain, and electronic effects promote the adsorption of 3 O 2 onto AuPt 0.09 , which dramatically enhances 1 O 2 generation and imparts AuPt 0.09 , the highest catalytic constant ever reported for 3,3′,5,5′-tetramethylbenzidine oxidation to the best of our knowledge. With a pH-dependent catalytic activity, AuPt 0.09 realizes acidity-dependent antitumor effects both in vitro and in vivo , a proof-of-concept demonstration of autocatalytic bimetallic nanocatalyst for light-free oxygen sensitization therapy, which may open a new avenue for 1 O 2 -centered therapeutics.
研究领域:
纳米技术
·
癌症治疗
·
材料科学
·
化学工程
·
生物医学工程
✓ 已验证
DOI
LANGMUIR
·
2026
·
IF 4.4
Annina Mittelholzer,Vincent Hickl,Katharina Maniura-Weber,Luciano F. Boesel,René M. Rossi,Markus Rottmar,Yashoda Chandorkar
Smart hydrogels are promising materials for soft actuators in biomedical applications thanks to their varied responses to external stimuli. Light is a particularly attractive trigger for contactless stimulation of hydrogels that can induce reversible morphological changes without damaging the fragile gels. To meet the varied needs of applications in microfluidics, soft robotics, biomedicine, and other fields, there is significant demand for novel valve designs that are highly tunable, miniaturizable, and respond quickly to stimuli while maintaining their function over many activation cycles. Additionally, it is crucial to develop a more quantitative understanding of the mechanics of valve operation in response to different stimuli, especially when active hydrogels are combined with other materials in multicomponent devices. Here, stimulus-responsive valves are fabricated using active hydrogels deformed upon temperature changes and exposure to near-infrared radiation. Gold nanorods (AuNRs) acting as photothermal transducers are embedded inside cross-linked poly N-isopropylacrylamide (PNIPAM), allowing local morphological changes in response to light with high spatiotemporal control. These changes are described precisely as a function of the valve’s confinement, aspect ratio, and the parameters of the stimulus using quantitative image analysis, providing novel mechanistic insights. Changing the aspect ratio of the valves and the degree of confinement of the hydrogel causes valves to either open or close during heating and can be used to control the magnitude of their response to different stimuli. These varied morphological changes are due to local, inhomogeneous deformations of the gel. The use of light as a trigger enables local confinement of the valve, reversible opening and closing, and fast response times on the order of seconds. The valves are shown to withstand hydrostatic pressures of up to 18 kPa, providing high potential for biomedical applications where precise pressure control and quick switching between open and closed states is critical.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Junjie Du,Yuting Wang,Wenbo Zhao,Qinghe Cao,Yingyi Cui,Fan Bu,Cao Guan
Liquid metal (LM) hydrogels emerge as promising materials for flexible electronics and soft robotics, but they are challenged by simplistic structure, limited precision, and insufficient functional designability. Herein, we demonstrate the first digital light processing of three-dimensional (3D) LM hydrogels with micrometer precision (10 µm) and arbitrarily elaborated architectures. A universal strategy is developed for photo-curable LM-based various resins by encapsulation of LM droplets with sodium alginate (SA). The SA coating not only prevents the ink from sedimentation and self-polymerization by forming hydrogen and ionic bonds, but also ensures uniformly dispersed ink with maintained photo-curing properties. As a result, the photo-cured 3D LM hydrogels illustrate enhanced tensile stretchability (2000%) and cycling stability (800 cycles at 500% strain), which outperforms most previously reported 3D hydrogels. The 3D LM hydrogel also shows enhanced sensitivity and tunable photothermal responsivity, demonstrating promising applications in strain sensors, object grasping robotics, remote-controlled devices, and anti-counterfeiting systems.
✓ 已验证
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2020
·Vol. 5
·期 6
·2000099
·
IF 5.969
Danyang Li,Junjie Wang,Miaozi Li,Gancheng Xie,Biao Guo,Lan Mu,Haiyang Li,Jian Wang,Hin-Lap Yip,Junbiao Peng
Perovskite light emitting devices have been expected to be utilized in the field of displays. In this work, a stable FA 0.3 Cs 0.7 PbBr 3 perovskite quantum dot ink with optimized octane:dodecane cosolvent is obtained by introducing a trace amount of long-chain ligand of oleylamine (OAm) during the quantum dot purification process. A green electroluminescent matrix device with 120 pixels per inch (PPI) is realized from the ink by using an inkjet printing technique, exhibiting a luminance of 1233 cd m −2 , a peak current efficiency of 10.3 cd A −1 , and an external quantum efficiency of 2.8%. The results may suggest a possibility of making perovskite quantum dot displays by using the inkjet printing technique.
研究领域:
材料科学
·
显示技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Fengtong Ji,Dongdong Jin,Ben Wang,Li Zhang
Swarm behaviors are nature’s strategies for performing cooperative work, and extensive research has been aimed at emulating these strategies in engineering systems. However, the implementation of vertical motion and construction of a 3D structure are still challenging. Herein, we propose a simple strategy for creating a hybrid-driven paramagnetic tornado-like microswarm in an aqueous solution by integrating the use of a magnetic field and light. The precession of a magnetic field results in in-plane rotation, and light promotes the conversion of a planar microswarm to a microswarm tornado, thus realizing the transition from 2D to 3D patterns. This 3D microswarm is capable of performing reversible, vertical mass transportation. The reconfigurable collective behavior of the swarm from 2D to 3D motion consists of rising, hovering, oscillation, and landing stages. Moreover, this 3D tornado-like microswarm is capable of controlling the chemical reaction rate of the liquid in which it is deployed, for example, the degradation of methylene blue. The experimental results unveil that the tornado-like microswarm can enhance the overall degradation while holding the reactant nearby and inside it because of the flow difference between near and far regions of the microswarm tornado. Furthermore, by applying an oscillating magnetic field, the 3D microswarm can process the trapped methylene blue for on-demand degradation. The microswarm tornado is demonstrated to provide a method for collective vertical transportation and inspire ideas for mimicking 3D swarm behaviors in order to apply the functional performance to biomedical, catalytic, and micro-/nanoengineering applications.
研究领域:
生物工程
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Jove-Journal of Visualized Experiments
·
2019
·
IF 1.108
XiaoXiang Fang,Zhihong Gao,Hanfeng Lu,Qiulian Zhu,Zekai Zhang
We demonstrate a method for the enhancement of CO2 photoreduction. As the driving force of a photocatalytic reaction is from solar light, the basic idea is to use concentration technology to raise the incident solar light intensity. Concentrating a large-area light onto a small area cannot only increase light intensity, but also reduce the catalyst amount, as well as the reactor volume, and increase the surface temperature. The concentration of light can be realized by different devices. In this manuscript, it is realized by a Fresnel lens. The light penetrates the lens and is concentrated on a disc-shaped catalyst. The results show that both the reaction rate and the total yield are efficiently increased. The method can be applied to most CO2 photoreduction catalysts, as well as to similar reactions with a low reaction rate at natural light.
研究领域:
环境科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2019
·Vol. 77
·期 6
·3223-3235
·
IF 1.858
Jiang Jingzhe,Wei Anqi,Li Jianping,Ji Yue,Qiang Huijun,Jiang Yan,Zhang Hongwen,Liu Hongbo
In this paper, hydroxyl terminated polysiloxane was first prepared by ring-opening polymerization of octamethylcyclotetrasiloxane (D 4 ), which was then modified with acryloyl chloride to obtain acryloyloxy polysiloxane. A light-scattering material was synthesized by copolymerization of acryloyloxy polysiloxane and methyl methacrylate (MMA). The results showed that the transmittance of the material was 88% and the haze was 93% when the ratio of MMA to light-scattering agent was 100:1, the amount of initiator was 0.3%, and the post-polymerization temperature was 50 °C. The TGA data indicated that the material had excellent heat resistance. Therefore, it has a wide range of applications in the field of light-emitting diodes.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INORGANIC BIOCHEMISTRY
·
2019
·
IF 3.224
Jian Zhao,Nannan Liu,Shuchen Sun,Shaohua Gou,Xinyi Wang,Zhimei Wang,Xiaoyan Li,Wenjing Zhang
Targeted delivery of clinically approved anticancer drug to tumor sites is an effective way to achieve enhanced drug efficacy as well as reduced side effects and toxicity. Here bicalutamide is caged by the Ru(II) center through the nitrile group, and three photoactive Ru(II) complexes were designed and synthesized. Docking study showed that the ruthenium(II) fragments can effectively block the binding of complexes 1–3 with AR (androgen receptor) owing to the large steric structures , thus bicalutamide in complexes 1–3 could not interact with AR-LBD (ligand binding domain). Once irradiation with blue light (465 nm), complexes 1–3 can release bicalutamide and anticancer Ru(II) fragments, which possesses dual-action of AR binding and DNA interaction simultaneously. In vitro cytotoxicity study on these complexes further confirmed that complexes 1–3 exhibited considerable cytotoxicity upon irradiation with blue light. Significantly, complex 3 could be activated at 660 nm, which greatly increases the scope of complex 3 to treat deeper within tissue. Theoretical calculations showed that the lowest singlet excitation energy of complex 3 is lower than those of complexes 1–2 , which explains the experimental results well. Moreover, the 3 MC (metal centered) states of these complexes are more stable than their 3 MLCT (metal to ligand charge transfer) states, indicating that the photoactive processes of these complexes are likely to result in ligand dissociation.
研究领域:
化学
·
药学
·
肿瘤学
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2012
·Vol. 24
·期 14
·1856-1861
·
IF 13.877
Zelin Dong,Changcheng Jiang,Huhu Cheng,Yang Zhao,Gaoquan Shi,Lan Jiang,Liangti Qu
Graphical Macroscopic graphene fibers with strength comparable to carbon nanotube yarns have been fabricated with a facile dimensionally-confined hydrothermal strategy from low-cost, aqueous graphite oxide suspensions, which is shapable, weavable, and has a density of less than 1/7 conventional carbon fibers. In combination with the easy in situ and post-synthesis functionalization, the highly flexible graphene fibers can be woven into smart textiles.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2013
·
IF 3.187
Shuxing Wu,Jianzhang Fang,Weicheng Xu,Chaoping Cen
Herein, we reported an ultrasonic-assisted synthesis of bismuth-modified rectorite with high visible light-induced photocatalytic activity. The as-synthesized samples were characterized by XRD, FT-IR, FESEM, TEM, BET, and UV–vis DRS techniques. Two toxic and nonbiodegradable organic compounds, Rhodamine B (RhB) and 2,4-dichlorophenol (DCP), were chosen as the target pollutants to characterize the adsorption performance and photocatalytic activity. The results showed that the prepared samples possessed strong adsorbility and exhibited high efficient photocatalytic activity under visible light irradiation. The excellent photocatalytic activity of bismuth-modified rectorite was ascribed to the strong adsorption ability, the interconnected heterojunction of Bi 2 O 3 and Bi 5 O 7 NO 3 , and the produced OH. Finally, the possible mechanism was presented.
研究领域:
材料科学
·
环境科学
✓ 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）