Scientific Reports
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2017
·Vol. 7
·期 1
·1-9
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IF 4.259
Ge Xue-hui,Geng Yu-hao,Zhang Qiao-chu,Shao Meng,Chen Jian,Luo Guang-sheng,Xu Jian-hong
Here in this article, we classify and conclude the four morphologies of three-phase emulsions. Remarkably, we achieve the reversible transformations between every shape. Through theoretical analysis, we choose four liquid systems to form these four morphologies. Then monodispersed droplets with these four morphologies are formed through a microfluidic device and captured in a petri-dish. By replacing their ambient solution of the captured emulsions, in - situ morphology transformations between each shape are achieved. The process is well recorded through photographs and videos and they are systematical and reversible. Finally, we use the droplets structure to form an on-off switch to start and shut off the evaporation of one volatile phase to achieve the process monitoring. This could be used to initiate and quench a reaction, which offers a novel idea to achieve the switchable and reversible reaction control in multiple-phase reactions.
研究领域:
化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2016
·
IF 2.857
Jun-Nan Tian,Bing-Qiang Ge,Yun-Feng Shen,Yu-Xuan He,Zhong-Xiu Chen
Interaction of endogenous sodium cholate (SC) with dietary amphiphiles would induce structural evolution of the self-assembled aggregates, which inevitably affects the hydrolysis of fat in the gut. Current work mainly focused on the interaction of bile salts with classical double-layered phospholipid vesicles. In this paper, the thermodynamics and structural evolution during the interaction of SC with novel unilamellar vesicles formed from vitamin-derived zwitterionic bolaamphiphile (DDO) were characterized. It was revealed that an increased temperature and the presence of NaCl resulted in narrowed micelle–vesicle coexistence and enlarged the vesicle region. The coexistence of micelles and vesicles mainly came from the interaction of monomeric SC with DDO vesicles, whereas micellar SC contributed to the total solubilization of DDO vesicles. This research may enrich the thermodynamic mechanism behind the structure transition of the microaggregates formed by amphiphiles in the gut. It will also contribute to the design of food formulation and drug delivery system.
研究领域:
生物化学
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食品科学
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药物递送系统
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 12
·1900071
·
IF 2.622
Diwei Yan,Sa Liu,Yong-Guang Jia,Lina Mo,Dawei Qi,Jin Wang,Yunhua Chen,Li Ren
Realizing the reversible transformation of the supramolecular hydrogels is essential for their application as smart materials. The reversible sol-gel transition of the polypseudorotaxane (PPR) hydrogels is achieved through adding a CO 2 -switchable guest molecule into the PPR hydrogel of poly(ethylene glycol) (PEG) and α-cyclodextrins (α-CDs). Alternating treatments with CO 2 and heating drive such reversible transition due to the competitive complexation as evidenced by 2D NOESY 1 H NMR and isothermal titration calorimetry as well as X-ray diffraction. The present work describes a straightforward way to obtain switchable PPR hydrogels triggered by a compatible stimulus of CO 2 . These stimuli-responsive PPR hydrogels have potential applications as biomaterials.
研究领域:
材料科学
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化学
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生物材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jia Yang,Chenyu Li,Zhenyang Li,Zhiwen Liu,Wenjie He,Yue Xiao,Shuzheng Liu,Gang Qin,Aiguo Zhou,Qiang Chen
Recyclable methylcellulose (MC) gel-based versatile triboelectric nanogenerator (TENG) holds great potential in energy harvesting and multi-purpose sensing. However, forming difficulty, inverse thermoreversible sol–gel transition of MC, inferior electrical generation and sensing of TENG pose significant limitations on the widespread application of MC gel-based TENG in various complex environments. Herein, a novel sol–gel of MC and solvent replacement method is proposed to prepare MC/potassium hydroxide/glycerol (MKG) conductive gel with excellent strength, elongation and electrical conductivity based on hydrogen bonds and salting-out effect. To enhance interfacial contact, a simple glass template is used to fabricate MKG gel-based TENG with rough interface, which exhibits superior energy-harvesting capability and can power various electronic devices. As a versatile self-powered sensor, the TENG can monitor motion parameters of moving objects, human motions, as well as letter writing stably and sensitively. The power generation and self-powered sensing performances remain reliable and stable under complex conditions. Moreover, the prepared MKG gel can be recycled, and recycled MKG gel-based TENG that retains comparable electrical generation and multifunctional self-powered sensing to the original. This study provides new insights for designing high-performance inverse thermoreversible MC gel and versatile MC-based flexible electronics.
研究领域:
材料科学
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能源技术
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传感器技术
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Liming Zhang,Zhuang Zhao,Siyu Chen,Wei Chen,Xuying Zhong,Yuehua Peng,Yanling Yin,Jun Liu,Wei Dou,Dongsheng Tang,Weichang Zhou
CsPb 2 Br 5 has attracted a tremendous attention recently owing to its high stability and unusual optical properties. However, the transformation between CsPb 2 Br 5 and CsPbBr 3 has yet been fully understood and the origin of the bright green emission in CsPb 2 Br 5 is still under debate . In this work, we elucidate the mechanism of the abnormal green emission in CsPb 2 Br 5 and reveal the light/heating/humidity induced reversible transformation between CsPb 2 Br 5 and CsPbBr 3 . The detailed structure characterization indicates the successful synthesis of pure phase CsPb 2 Br 5 , which exhibits a non-luminous feature. Remarkably, after the treatment of ultraviolet laser irradiation or annealing, the pure phase CsPb 2 Br 5 can be transformed partially or completely into CsPbBr 3 , yielding an unexpected bright green emission. In addition, the transformed CsPbBr 3 can be converted back to CsPb 2 Br 5 under the humidity environment, demonstrating the reversible transformation and photoluminescence switch. Interestingly, CsPbBr 3 derived from transformed CsPb 2 Br 5 exhibits superior emission properties such as higher photoluminescence stability, compared with the one-spot directly synthesized CsPbBr 3 . Moreover, the light induced transformation facilitates the fabrication of CsPb 2 Br 5 /CsPbBr 3 nano-heterostructure diodes with a high rectification ratio. These results provide an important insight into the photophysics and transformation mechanism of all-inorganic Cs-Pb-Br perovskites for photonics/electronics device applications.
研究领域:
材料科学
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纳米光学
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半导体物理
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光电材料
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固态化学
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器件物理
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功能材料
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产品关联
DOI
高影响因子
Soft Matter
·
2017
·Vol. 13
·期 20
·3783-3788
·
IF 3.889
Dongfang Liu,Yuxin Suo,Jiang Tan,Hongsheng Lu
At present, more and more researchers around the world are paying attention to stimuli-responsive surfactants. In this paper, we have reported a microemulsion prepared from the tertiary amine TMPDA (N,N,N′,N′-tetramethyl-1,3-propanediamine) and the anionic surfactant SDS (sodium dodecyl sulphate), which has good carbon dioxide response characteristics. The molar ratio of TMPDA to SDS is 1 : 2. By introducing CO2 into the microemulsion that consists of SDS, TMPDA, n-hexane, n-butanol and water, the tertiary amine TMPDA molecules can be protonated to form quaternary ammonium species. The protonated tertiary amine TMPDA can be assembled with SDS by electrostatic interactions to form a pseudogemini surfactant (SDS–TMPDA–SDS). The pseudogemini surfactant can dissolve in the aqueous phase which makes the microemulsion break down eventually. By bubbling N2 after CO2 into the same system at 50 °C for 3 hours, the pseudogemini surfactant SDS–TMPDA–SDS disintegrates into SDS and TMPDA, respectively. At the same time, the microemulsion also recovers its initial state. Such a reversible transition could be repeated for several cycles from monophase to complete phase separation.
研究领域:
化学
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材料科学
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DOI
PubMed
高影响因子
NATURE MATERIALS
·
2023
·Vol. 22
·期 10
·1189-1195
·
IF 41.2
Tang Hu,Cheng Yong,Yuan Xiaohong,Zhang Kai,Kurnosov Alexander,Chen Zhen,Xiao Wenge,Jeppesen Henrik S.,Etter Martin,Liang Tao,Zeng Zhidan,Wang Fei,Fei Hongzhan,Wang Lin,Han Songbai,Wang Ming-Sheng,Chen Guang,Sheng Howard,Katsura Tomoo
Glasses, unlike crystals, are intrinsically brittle due to the absence of microstructure-controlled toughening, creating fundamental constraints for their technological applications. Consequently, strategies for toughening glasses without compromising their other advantageous properties have been long sought after but elusive. Here we report exceptional toughening in oxide glasses via paracrystallization, using aluminosilicate glass as an example. By combining experiments and computational modelling, we demonstrate the uniform formation of crystal-like medium-range order clusters pervading the glass structure as a result of paracrystallization under high-pressure and high-temperature conditions. The paracrystalline oxide glasses display superior toughness, reaching up to 1.99 ± 0.06 MPa m 1/2 , surpassing any other reported bulk oxide glasses, to the best of our knowledge. We attribute this exceptional toughening to the excitation of multiple shear bands caused by a stress-induced inverse transformation from the paracrystalline to amorphous states, revealing plastic deformation characteristics. This discovery presents a potent strategy for designing highly damage-tolerant glass materials and emphasizes the substantial influence of atomic-level structural variation on the properties of oxide glasses.
研究领域:
材料科学
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玻璃科学
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凝聚态物理
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DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Zhang Die,Fu Boyang,He Weilong,Li Hengtao,Liu Fuyang,Wang Luhong,Liu Haozhe,Zhou Liujiang,Cai Weizhao
Dynamic crystals with directional deformations in response to external stimuli through molecular reconfiguration, are observed predominantly in certain organic crystals and metal complexes. Low-dimensional hybrid halides, resemble these materials due to the presence of strong hydrogen bonds between bulky organic moieties and inorganic units, whereas their dynamic behavior remains largely unexplored. Here we show that a one-dimensional hybrid halide (MV)BiBr 5 (MV = methylviologen) undergoes an isosymmetric phase transition at hydrostatic pressure of 0.20 GPa, accompanied by a remarkable length expansion of 20–30% and red to dark yellow color change. Unexpectedly, the backward transition can be fully reversed by mechanical stimulation rather than decompression. In the high-pressure phase, the coexistence of strong Bi 3+ lone pair stereochemical activity and large reorientations of the planar MV 2+ cations, together with the newly formed CH···Br hydrogen interactions, are the structural features that facilitate microscopic changes and stabilize the metastable high-pressure phase at ambient conditions.
研究领域:
材料科学
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晶体学
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固体化学
✓ 已验证
DOI
高影响因子
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