CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Dong Gao,Yusheng Zhang,Amin Liu,Yuda Zhu,Suping Chen,Dan Wei,Jing Sun,Zhenzhen Guo,Hongsong Fan
Multiple-color-emissive carbon dots (CDs) is one of the hotspots due to its potential in multi-fields. However, the exploring of efficient synthetic strategies and emission mechanisms still remain challenging. Herein, we report a facile solvothermal route to prepare CDs with tunable photoluminescence (PL) from green to red via a novel PL-tuning strategy of sulfur doping and water engineering. By detailed characterizations and comparison, it is demonstrated that the S doping can significantly increase the content of graphitic nitrogen, resulting in the fluorescence shifting from green to yellow; on the other hand, water engineering is able to yield carboxyl group and enhance surface oxidation degree, which can further facilitate the PL shifting from yellow to red. Owning to multicolor emissions and S doping, the prepared PL-tunable CDs present versatility in various applications including fluorescent films, light-emitting diodes (LED), bioimaging probe and highly sensitive Fe 3+ detector.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
H. Meng,X. Yang,Y. Wang,C. Wang,W. Ye,F. Ma,T. Han,J. Qi,C. Wang
The adaptive behaviors of organisms in response to different environments can inspire the development of smart materials. These biomimetic color-changing actuating materials (BCCAMs) with complex shape memory (SM), self-healing, shape reconfigurable and reprocessing properties may be exactly what the flexible actuators/robots/electronic skins need. Here, we prepared an ultra-high strain (∼1600%) soft actuation material with fluorescence changes, self-healing, and SM performance under a single stimulus by a simple method. At the same time, we developed a simple strategy based on welding to achieve actuators that have a reconfiguring three-dimensional (3D) deformation and medium temperature reprocessing. The resulting 3D soft actuators can achieve effective coordination of these functions. Flexible actuators with multiple functions that can be triggered by a single switch are expected to have value in soft robots, flexible electronic skins, and so on.
研究领域:
材料科学
·
仿生学
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2018
·Vol. 92
·期 11
·2257-2264
·
IF 0.549
Hong Shao,Ma Qianli,Yu Wensheng,Dong Xiangting,Wang Jinxian,Liu Guixia
Abstract Herein, we describe the innovative one-dimensional nanomaterials, electrospun composite nanoribbons (width 10.119 ± 0.186 μm) containing complexes of Eu(TTA) 3 (TPPO) 2 and Tb(BA) 3 phen in a matrix of polymethylmethacrylate (PMMA). Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and fluorescence spectroscopy were used to characterize the final products. The novel luminescent composite nanoribbons exhibit green, orange and red fluorescence emission peaks at 490, 545, 592, and 615 nm, which are ascribed to the 5 D 4 → 7 F 6 (490 nm) and 5 D 4 → 7 F 5 (545 nm) energy transitions of Tb 3+ ions, and the 5 D 0 → 7 F 1 (592 nm), 5 D 0 → 7 F 2 (615 nm) transitions of Eu 3+ ions, respectively. It is observed that the doping percentage and the chosen excitation wavelength could be used to tune the emission color of the samples. The color-tunable luminescent composite nanoribbons have potential applications in the fields of display panels, lasers and bioimaging.
研究领域:
材料科学
·
光学
·
生物成像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2024
·Vol. 62
·期 13
·2887-2897
·
IF 3.9
Bo Cheng,Hongrui Hu,Jianli Chen,Mingdi Yang,Ping Wang,Kehua Zhang,Chengbing Gong,Yunsheng Ding,Xianhai Hu
Fluorescent tunable materials have potential applications in lighting, display, anti-counterfeiting, biological probes, and so on. Herein, carbon quantum dots (CQDs) with blue fluorescence (BCDs), and yellow fluorescence (YCDs) were synthesized by solvothermal method using bio-based citric acid and lignin as carbon sources, respectively. BCDs and YCDs were anchored on polyurethane chains to prepare waterborne polyurethane-based blue fluorescent carbon quantum dots (BCDs 1.0 -WPU) and waterborne polyurethane-based yellow fluorescent carbon quantum dots (YCDs 1.0 -WPU), respectively. Compared with the corresponding BCDs and YCDs, the fluorescence intensity of both BCDs 1.0 -WPU and YCDs 1.0 -WPU is markedly enhanced, and the emission peaks obviously show a hypochromatic shift. A waterborne polyurethane-based fluorescent tunable carbon quantum dots (BCDs x YPDs 1-x -WPU) is prepared by mixing the ratio of BCDs 1.0 -WPU and YCDs 1.0 -WPU with the RGB method. It is noteworthy that BCDs x YCDs 1-x -WPU not only achieves a fluent change of fluorescence from blue to yellow but also emits strong white fluorescence (CIE coordinates: X = 0.28, Y = 0.32). The absolute value of the Zeta potential of BCDs x YCDs 1-x -WPU is greater than 40, indicating good storage stability. Furthermore, the thermal decomposition temperature is above 225 °C, implying good thermal stability. Furthermore, BCDs x YCDs 1-x -WPU uses water as a continuous phase and has potential applications in environmentally friendly luminescence, anti-counterfeiting and biological probes. Graphical
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Lihan Deng,Jin Li,Jiachen Chen,Jin He
Nanoporous Al 2 O 3 -SiO 2 glasses were prepared using a sol–gel method. These sintered nanoporous Al 2 O 3 -SiO 2 glasses have a transmittance greater than 85 % and possess high mechanical strength, enabling them to contain and protect RE ions. Owing to the presence of nanopores in nanoporous Al 2 O 3 -SiO 2 glasses, Eu ions can easily enter the nanoporous Al 2 O 3 -SiO 2 glasses via an ex-situ dipping method. After drying at room temperature (RT) and then heating at 400 °C, 600 °C, 800 °C, and 1200 °C, we obtained a series of Eu doped nanoporous Al 2 O 3 -SiO 2 glasses. The thermal reduction process from Eu 3+ ions to Eu 2+ ions can occur at a lower sintering temperature (400 °C), enabling a detailed analysis of the thermal reduction mechanism at both low and high temperatures in detail. Under the conditions where Al 3+ ions are present in the samples that are under calcination, Eu 2+ -doped nanoporous Al 2 O 3 -SiO 2 glasses are more easily obtained at relatively low temperatures. Owing to the adjustable composition of Eu 3+ /Eu 2+ in the nanoporous Al 2 O 3 -SiO 2 glasses, tunable emission from red-orange light to blue-violet light can be achieved in the samples. This new type of transparent Eu-doped NPGs has the advantages of high mechanical strength and good processability and is non-toxic and harmless, thereby showing great potential for use in tunable light sources and LED devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yueyan Zang,Jinxia Xu,Zhentong Lu,Chunhui Yi,Fanyong Yan
Fluorescence-tunable sulfur quantum dots (SQDs) were obtained by an assembly-fission process and assisted etching with H 2 O 2 . The morphological and structural characterization indicated that the obtained SQDs possess excellent dispersion, high water solubility and abundant surface functional groups, which is beneficial to its further application. In the Gaussian software, the electron cloud density distribution around the entire molecular structure is simulated and the density generalization calculations confirms that the main reason for the red shift of emission is the synergistic effect of SQDs size and surface states. Moreover, blue fluorescent SQDs (B-SQDs) showed high sensitivity and specific selectivity toward berberine hydrochloride with detection limits as low as 0.24 nM, and have been successfully used for water sample and actual drug detection. It is noteworthy that the solid-state luminescence properties of SQDs are mainly attributed to the adsorption of chain PEG on the surface of SQDs. By mixing SQDs with epoxy resin , dual-color fluorescent films were prepared and used as the fluorescence conversion layer to manufacture high-performance light-emitting diodes. The CIE (Commission Internationale d′Eclairage) coordinates of WLED is (0.27,0.29), CCT (Correlated color temperature) is 5793 K and CRI (Color rendering index) is 85.2. Moreover, the prepared SQDs are highly fluorescent and enable latent fingerprint imaging for identity recognition. This work has advanced the development of SQDs for analytical sensing, optical devices , and fingerprint imaging.
研究领域:
材料科学
·
分析化学
·
光学工程
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Qianmin Ma,Meng Zhang,Chi Yao,Yaping Du,Dayong Yang
Lanthanide (Ln)-based supramolecular hydrogels are a new category of smart optical materials, which are promising for applications in chemistry sensors, bioimaging agents and light-emitting devices. Herein, we report a supramolecular hydrogel with tunable and responsive luminescence, which is based on the assembly of Ln and deoxyguanosine (dG, one of the units of DNA). ESI-TOF-MS, NMR, FTIR, PXRD and simulation results verify the formation of dG/Ln hydrogels. dG/Tb hydrogel emits strong green luminescence, while dG/Eu hydrogel is nonluminous; when Tb is co-doped into dG/Eu, surprisingly we find that co-doped dG/Tb/Eu hydrogel displays tunable luminescence from green, orange to red by simply regulating the stoichiometric ratio of Tb and Eu. A cascade luminescence resonance energy transfer mechanism (from dG to Tb, and to Eu) is proposed in this co-doped system, which is confirmed by luminescence decay curves and emission spectra. Subsequently, luminescence switch is designed based on reversible responsiveness of hydrogel upon Ag + /L-Cys, temperature and pH stimuli via dynamic supramolecular coordination. Our work provides a new route to construct multicolor functional materials.
研究领域:
材料科学
·
生物医学工程
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Xiaojun She,Shicong Pei,Zhuqing Li,Kaixuan Shao,Yuqing Yang,Hang Li,Mingdi Yang,Kehua Zhang,Jie Jin,Yunsheng Ding,Xianhai Hu
Fluorescent tunable polymers have wide application prospects in lighting, display, and bioimaging, among which fluorescent tunable polymers with wide UV shielding have received great attention. Herein, 1, 10-Phenanthrolin-5-amine (APhen) is used as the terminal agent to prepare a blue fluorescent polyurethane prepolymer, which is then coordinated with zinc ions to obtain a fluorescent tunable waterborne polyurethane-based zinc complex (WPU-APhen x Zn y ) with wide UV shielding. WPU-APhen x Zn y has good storage and thermal stability. It is worth noting that WPU-APhen x Zn y can not only achieve complete shielding of ultraviolet light in the range of 200–400 nm but even extend the shielding range to the visible light range of 408 nm. Curiously, by adjusting the degree of coordination of zinc ionization, the fluorescence color can be controlled from blue to yellow. Furthermore, the fluorescence lifetime of WPU-APhen x Zn y decreases with the increase in the degree of coordination zinc ionization. Importantly, WPU-APhen x Zn y uses water as a dispersant and is an environmentally friendly material with both anti-counterfeiting and UV shielding. Graphical
研究领域:
材料科学
·
光学材料
·
环保材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2021
·
IF 4.089
Ye Yuan,He Zhang,Jinqing Qu
The smart fluorescent hydrogels exhibiting tunable fluorescence have been used as biosensors, probes, light-emitting devices, and information storage and confidentiality. However, they usually show single stimuli responsiveness and possess weak mechanical properties, which limit their applications. Herein, we report a pyridine-dicarbohydrazone-based polyacrylate hydrogel (the As-prepared hydrogel and Eu-hydrogel) showing strong mechanical property, tunable fluorescence ability, and thermal and pH stimuli responsiveness. The As-prepared hydrogel is prepared by light-induced micellar copolymerization, and Eu-hydrogel is obtained after the formation of Eu3+-(pyridine-dicarbohydrazone) coordination. The As-prepared hydrogel could be made in large size (side length of 15 cm), exhibiting a tensile strength of 1.55 MPa and a fracture tensile strain of 800%. The fluorescence intensity of Eu-hydrogel is tunable by [Eu3+] (approaching 655% of the minimum state at [Eu3+] = 0.1 mol). It is demonstrated that Eu-hydrogels display force-induced fluorochromic response during stretching. The transmittance temperature of the As-prepared hydrogel ranges from 36 to 42 °C. Reversible Eu3+-(pyridine-dicarbohydrazone) coordination enables Eu-hydrogels to have excellent fatigue resistance. The pH stimuli responsiveness of the As-prepared hydrogel and Eu-hydrogel is triggered by switchable covalent hydrozone bonds. In terms of the shape-memory ability, the As-prepared hydrogel could be reconstructed by Eu3+ and Eu-hydrogel could be deformed by H+. This mechanically strong (pyridine-dicarbohydrazone)-based polyacrylate hydrogel with multistimuli responsive behaviors is promising to be used in information transmission, smart windows, load-bearing devices, energy-absorbing materials, and soft wearable devices.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Guozhi Ma,Jihai Cai,Xiaoying Wang
High-value conversion of agroforestry residues into carbon dots (CDs)-based phosphors for white light emitting diodes (WLEDs) suffers from difficulty in adjusting fluorescence from the blue to red region. In this paper, xylan from sugar cane bagasse was utilized as a precursor to fabricate blue (B), green (G), yellow (Y), and red (R) fluorescent CDs with p-phenylenediamine by solvent modulation. The quantum yields of B-, G-, Y-, and R-CDs were 23.5%, 4.5%, 2.2%, and 15.4%, respectively. The formation and tuning mechanism of multicolor CDs were elucidated by structural characterization and density-functional theory (DFT) calculations. The results showed that the increased carbonization of CDs and graft of C═O on the CD surface by xylan passivation are two key reasons for the red-shift of fluorescence emission. WLEDs with color coordinates located at (0.30, 0.31) were successfully prepared by B-, G-, and R-CD/epoxy composites. In addition, the G-CD/epoxy composite demonstrated phosphorescence property and potential application in information security encryption. This study provides new avenues for the high-value utilization of agroforestry residues.
研究领域:
材料科学
·
环境科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Hengchang Ma,Yanfang Qin,Zengming Yang,Manyi Yang,Yucheng Ma,Pei Yin,Yuan Yang,Tao Wang,Ziqiang Lei,Xiaoqiang Yao
Fluorescence-tunable materials are becoming increasingly attractive because of their potential applications in optics, electronics, and biomedical technology. Herein, a multicolor molecular pixel system is realized using a simple copolymerization method. Bleeding of two complementary colors from blue and yellow fluorescence segments reproduced serious multicolor fluorescence materials. Interestingly, the emission colors of the polymers can be fine-tuned in the solid state, solution phase, and in hydrogel state. More importantly, the positive fluorescent polymers exhibited cell-membrane permeable ability and were found to accumulate on the cell nucleus, exhibiting remarkable selectivity to give bright fluorescence. The DNA/RNA selectivity experiments in vitro and in vivo verified that [tris(4-(pyridin-4-yl)phenyl)amine]-[1,8-dibromooctane] has prominent selectivity to DNA over RNA inside cells.
研究领域:
生物医学工程
·
材料科学
·
分子生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Linxu Xu,Yaxin Li,Feiyong Chen,Xue Shen,Zhigang Yang,Jin Wang,Yufeng Du,Xinmeng Yue,Rupeng Liu,Yubo Zhao
In this paper, we present a simple way to achieve the controllable synthesis of composite ZnO@SiO 2 materials. γ-aminopropyltriethoxysilane (APTES) was chosen as the silicon source, and pre-synthesized zinc bromoacetate (ZnBA) was selected the functional metal precursor. By simply regulating the water–ethanol volume ratio, it was possible to simultaneously regulate the sizes of both the composite material and the metal nanoparticles . With an increase in the hydroalcoholic volume ratio from 1:1–3:1, the sizes of the silica materials were increased from 615 to 3020 nm, while the sizes of the ZnO nanoparticles were increased from 3.75 to 6.25 nm. Three ZnO@SiO 2 materials with blue, green, and yellow fluorescence were obtained. More importantly, the hydroalcoholic volume ratio and the particle size of the material showed a good linear relationship. In addition, a “rapid nucleation–aggregation growth” mechanism was proposed, and the controlled growth of metal oxide nanoparticles was explored.
研究领域:
材料科学
·
纳米技术
✓ 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）