CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Konghua Yang,Shiliang Chen,Yibin Liu,Yunhong Liang,Zhihui Zhang,Chunbao Liu
Achieving precise and rapid droplets manipulation in versatile directions transport remains a considerable challenge, however adhesion switchable transitions deemed to be rather serviceable. Here, a double-sided microplate array (DMPA) with bio-inspired Janus surfaces, is proposed to fulfill adjustable adhesion through surface wettability switching and microplate dynamic deformation, thereby executing the droplet multi-dimensional manipulation in response to dynamic magnetic field. The triple-coupled bio-inspired Janus surfaces are newly designed with a convex hull and striped structure respectively, inspired by the respiratory ciliary motion and surface properties of lotus and rice leaves. Leveraging variation in superhydrophobicity and low adhesion of convex hull side on Janus surface, diverse droplet directional transports are achieved in plane, such as high-speed horizontal transport (120 mm/s and 500 µL), anti-gravitational climbing (inclined by 15°), and selective droplet orientation. The adhesion switchable transition of surface striped structure on other side is predominated by solid–liquid contact lines evolution resulting from microplate bending deformation, realizing droplet capture/release for long-distance multi-dimensional transport. Concurrently, a magnetic-responsive droplet switch is developed based on multi-directional droplet manipulation, demonstrating enormous potential for practical application.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Xiaotong Lu,Shengnan Li,Limin Wang,Sujuan Huang,Zhongqiu Liu,Yujing Liu,Anguo Ying
The prime purpose of this work is to prepare a novel kind of Pickering interfacial solid catalysts for biodiesel production to meet the requirements of highly efficiency and environmental benign. To achieve this goal, the core–shell P[xSPA-yDABCO]@SiO 2 @Fe 3 O 4 composite materials with a shell of photo-responsive and base catalytic sites were manufactured by means of layer-by-layer fabrication method. The modified materials, entirely characterized by transmission electron microscopy (TEM), scanning electron microscope (SEM), Fourier transform infrared (FT-IR) spectra, X-ray powder diffraction (XRD) and magnetization versus magnetic (VSM) techniques, demonstrated sufficient catalytic active sites and photo-responsive sites. Among all the so-prepared catalysts, P[3SPA-2DABCO]@SiO 2 @Fe 3 O 4 performs extremely well and can stabilize soybean oil-in-methanol Pickering emulsion for 24 h, achieving a biodiesel yield up to 98.2% at a catalyst dosage of 5 wt% after the reaction time of 5 h at 60 °C. Furthermore, the double responsive solid catalyst can be readily separated from the mixture of reaction by an external magnet and UV irradiation, and still presented superior catalytic activity after 6 cycles.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Photonics Nexus
·
2023
·
IF 0
Haiyang Liu,Zongnan Zhang,Yingqiu Li,Yaping Wu,Zhiming Wu,Xu Li,Chunmiao Zhang,Feiya Xu,Junyong Kang
Achieving valley pseudospin with large polarization is crucial in the implementation of quantum information applications. Transition metal dichalcogenides (TMDC) with different phase structures provide an ideal platform for valley modulation. The valley splitting has been achieved in hybrid phase WSe2, while its valley polarization remains unstudied. Magnetic field controllable valley polarization is explored in WSe2 with coexistence of H and T phases by an all-optical route. A record high valley polarization of 58.3% is acquired with a 19.9% T phase concentration under a 4-T magnetic field and nonresonant excitation. The enhanced valley polarization is dependent on the phase component and shows various increasing slopes, owing to the synergy between the T phase WSe2 and the magnetic field. The magnetic field controlled local magnetic momentums are revealed as the mechanism for the large valley polarization in H / T-WSe2. This speculation is also verified by theoretical simulations of the nonequilibrium spin density. These results display a considerable valley magnetic response in phase-engineered TMDC and provide a large-scale scheme for valley polarization applications.
研究领域:
凝聚态物理
·
材料科学
·
量子信息
·
光学调控
·
二维材料
✓ 已验证
DOI
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 7
·4464-4470
·
IF 1.354
Ji Fan,Zhang Kun,Li Jie,Gu Yuanliang,Zhao Jinshun,Zhang Jianfeng
Cancer chemotherapy has limitations such as nonselective distribution of drugs, detrimental side effects on normal tissues; here we reported a smart pH and magnetic sensitive drug delivery system (DDS) based on PEGylated Fe3O4 superparamagnetic nanoparticles. The
citric-coated Fe3O4 (CIO) nanoparticles were firstly synthesized and further functionalized by biocompatible poly(ethylene glycol) bis(carboxymethyl ether) (COOH-PEG-COOH), thus PEGylated CIO (GCIO) nanoparticles were obtained. Doxorubicin (DOX) was conjugated as a model
drug to the nanoparticles via hydrazone bond. The roughly sphere GCIO nanoparticles were comparatively strong magnetism with high drug loading capability (~89%) in relatively uniform size. Drug release study revealed that the GCIO-DOX performed pH-responsive drug-release properties. MTT assay
demonstrated that GCIO nanoparticles possessed low cytotoxicity and good physiological stability. Further, cell viability results indicated that the GCIO-DOX showed effective cytotoxicity only a bit lower than free DOX. All obtained data indicated that the combined pH-responsive and magnetic
multifunction drug delivery system can has excellent potential applications in cancer therapy.
研究领域:
生物医学工程
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 37
·25780-25788
·
IF 3.3
Runna He,Shuangqing Sun,Jianpeng Cui,Mingshuo Chi,Zhikun Wang,Songqing Hu
In recent years, Pickering emulsifiers have been widely used in various production fields due to their excellent structural stability, biocompatibility and environmental friendliness. For some applications, it is required that the emulsifier can quickly respond to environmental stimuli and control the transition between stable and unstable emulsions. In this paper, we report a novel composite Pickering emulsifier with Fe3O4 as the core and magnetic response recognition body, silica as the intermediate protective layer, and chitosan (CS) of different molecular weights to endow solid particles with surface activity and pH-responsive properties. This emulsifier can stabilize the emulsion in the emulsion system with deionized water as the aqueous phase and liquid paraffin as the oil phase and can control the demulsification of the formed emulsion under the dual pH/magnetic stimulation. The experimental results show that Fe3O4@SiO2@CS has good paramagnetism and pH responsiveness. The particle size of the composite emulsifier nanoparticles is between 90 nm and 120 nm, and the best stabilizing effect of the emulsion is achieved when the dosage is 0.5 wt%. In the pH range of 3–11, the emulsifier can rapidly demulsify a stable paraffin oil–water emulsion system under the action of a magnetic field of strength 0.4 T. The pH response of the emulsifier is as follows: when pH ≤ 2, the system can form a stable emulsion, which is composed of fully protonated chitosan as a free chain segment and Fe3O4@SiO2. Emulsion stabilization was achieved with monolithic Fe3O4@SiO2@CS as an emulsifier at pH > 2, and demulsification was achieved at pH ≈ pKb (CS) at 298 K. The research in this paper can provide a feasible idea and synthesis method for the preparation of organic–inorganic composite structure emulsifier.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 7
·1810-1818
·
IF 6.569
Yabin Ma,Bin Quan,Zhihui Zeng,Yunke Zhang,Lan Zhang,Yu Wang,Xiaogu Huang
Strong electromagnetic (EM) response at low thickness is urgently required to address the emerging EM radiation pollution. Among numerous methods to achieve electromagnetic response at low thickness, interface construction exhibits some advantages for the combination of numerous dissipation mechanisms. Here, ternary Mo-Ni2P/rGO absorbers with multiple interfaces are designed via the phosphating treatment at a certain temperature. The constructed heterojunctions can efficiently exploit the high-conjunction of Ni2P and rGO and the interactions between different dielectric media (metal/semiconductor/conductor) for excellent electrical conductivity, abundant interfacial polarizations, and rational combination of different loss materials. As the phosphating temperature increases from 600 to 800 °C, the Mo-Ni2P/rGO-800 sample exhibits excellent microwave absorption performance, where the reflection loss (RL) value is −35.43 dB, and the effective bandwidth reaches 3.48 GHz at only 1.20 mm. This study proposes a simple method to enhance the microwave absorption performance at low thickness based on the construction of heterojunction structures. Moreover, an insight into the role of integrating different loss mechanisms in achieving high-efficiency EM wave absorbers has been fulfilled.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Wenwen Li,Min Sang,Shuai Liu,Bochao Wang,Xufeng Cao,Guanghui Liu,Xinglong Gong,Lingyun Hao,Shouhu Xuan
Soft actuators with large deformation and high stability in response to multi-stimuli are highly demanded in biomimetic applications. However, most of the present actuators driven by a single stimulus often exhibit low performance and high energy consumption. In this work, a sandwich structural soft actuator (MPDMS/MXene/PTFE) which possesses electrothermal/magnetic coupling actuation is fabricated by combining magnetic NdFeB/Polydimethylsiloxane (MPDMS) composite layer, MXene film, and PTFE tape together. Due to the large difference of thermal expansion coefficient between MPDMS film and PTFE tape, the soft actuator shows a wonderful electrothermal actuation and the bending deformation can reach to as high as 353° under a 3 V power supply. The excellent electrical conductivity of MXene component endows the sandwich film with good thermal management performance, thus the soft MPDMS/MXene/PTFE sandwich films can be applied in the thermal treatment of body and thermal imaging. Most importantly, the soft actuator also exhibits a typical magnetic biomimetic actuation and the programmable actuation performance of the dragonfly actuator can be demonstrated by both experiments and finite element simulations. Eventually, the electrothermal/magnetic coupling actuation is successfully applied in an intelligent crawling robot to overcome the traditional inchworm movement simulation.
研究领域:
材料科学
·
仿生学
·
软体机器人
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Lerong Liu,Weizheng Song,Wan Zheng,Feihu Li,Hanlin Lv,Yuhang Wang,Yanjun Chen,Yifeng Wang
Multilayer beads made from biomacromolecules are useful for encapsulating, protecting, and delivering active ingredients such as drugs, dyes, and proteins. However, their encapsulated cargos are allowed to diffuse slowly out into the surrounding solvent during storage. This study describes a “smart” multilayer bead that can achieve zero leakage for encapsulated materials during storage and controlled release after triggered by near-infrared (NIR) light. The innermost layer of the multilayer bead containing Fe 3 O 4 magnetic nanoparticles is prepared based on the thermal-responsive sol-gel transition of agar, which offers magnetic responsiveness to the bead. The middle layer of the bead embedding gold nanorods (Au NRs) is produced by the ionic crosslinking between alginate and terbium ions. Moreover, encapsulated materials (drugs, dyes, and agrochemicals) are loaded in the middle layer. The outermost layer of the bead, a paraffin-wax shell, is formed at 75 ℃ through the phase transition of paraffin wax . Because of the protection of the paraffin-wax shell, the encapsulated materials present zero leakage when the multilayer bead is placed in aqueous solutions for at least six weeks. Under the irradiation of 808 nm NIR light for 1 min, the multilayer bead is heated up to 50 ℃ by the photothermal effect of Au NRs in the middle layer, which triggers the melting of the paraffin-wax shell. Then, the controlled release of the encapsulated materials can be achieved by the rest of the bead. Furthermore, the bead can be recycled after the release due to its magnetic responsiveness. Consequently, the multilayer bead is a novel, green and economical candidate for diverse applications, especially for the encapsulation and controlled release of hydrophilic materials in bio-related applications.
研究领域:
材料科学
·
生物医学工程
·
药物递送
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Junjie Fan,Jianpeng Cui,Tianhao Zhang,Jianwen Hu,Ziqi Wu,Mingshuo Chi,Wenqing Xie,Shuangqing Sun,Songqing Hu
In this study, we successfully synthesized silica coated Fe 3 O 4 nanoparticles (Fe 3 O 4 @SiO 2 NPs) and further animated their surface to create amino modified Fe 3 O 4 @SiO 2 (Fe 3 O 4 @SiO 2 -NH 2 ) NPs. By taking advantage of the pH-responsive dynamic (covalent) imine bond between the hydrophilic Fe 3 O 4 @SiO 2 -NH 2 NPs and the hydrophobic cinnamaldehyde molecule (R), we developed dynamic covalent Fe 3 O 4 @SiO 2 (Fe 3 O 4 @SiO 2 -R) NPs with switching wettability . These NPs were then utilized to form Pickering emulsions , and whose stability and pH/magnetic response were thoroughly investigated. As the NPs concentration in the emulsion increased, the emulsion stability initially improved but then subsequently slightly decreased. Emulsifiers exhibited emulsifying effect on various oil phases, with paraffin oil demonstrating the best effect. By adding Hydrochloric acid to the emulsion, we successfully broke the imine bond at a pH value of 2.8, resulting in demulsification. Applying a magnetic field also achieved demulsification. After five cycles of pH or magnetic response-induced emulsification and demulsification, a stable Pickering emulsion could still be obtained. Stimuli-responsive Pickering emulsions have been extensively studied, but there is limited research on double-responsive Pickering emulsions. This study presents a novel design of Pickering emulsions with pH/magnetic dual responsiveness, offering great potential for oil-water separation applications.
研究领域:
材料科学
·
化学工程
·
界面科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 15
·2587
·
IF 5.719
Gaihuan Ren,Zhanzhao Li,Dongxu Lu,Bo Li,Lulu Ren,Wenwen Di,Hongqin Yu,Jianxin He,Dejun Sun
Herein, we describe pH and magnetism dual-responsive liquid paraffin-in-water Pickering emulsion stabilized by dynamic covalent Fe3O4(DC-Fe3O4) nanoparticles. On one hand, the Pickerinfigureg emulsions are sensitive to pH variations, and efficient demulsification can be achieved by regulating the pH between 10 and 2 within 30 min. The dynamic imine bond in DC-Fe3O4can be reversibly formed and decomposed, resulting in a pH-controlled amphiphilicity. The Pickering emulsion can be reversibly switched between stable and unstable states by pH at least three times. On the other hand, the magnetic Fe3O4core of DC-Fe3O4allowed rapid separation of the oil droplets from Pickering emulsions under an external magnetic field within 40 s, which was a good extraction system for purifying the aqueous solution contaminated by rhodamine B. The dual responsiveness enables Pickering emulsions to have better control of their stability and to be applied more broadly.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 1
·67
·
IF 5.3
Xueting Xuan,Yi Li,Xing Xu,Zhouyi Pan,Yu Li,Yonghao Luo,Li Sun
Stimuli-responsive hydrogels hold immense promise for biomedical applications, but conventional gelation processes often struggle to achieve the precision and complexity required for advanced functionalities such as soft robotics, targeted drug delivery, and tissue engineering. This study introduces a class of 3D-printable magnetic hydrogels with tunable stiffness, adhesion, and magnetic responsiveness, prepared through a simple and efficient “one-pot” method. This approach enables precise control over the hydrogel’s mechanical properties, with an elastic modulus ranging from 43 kPa to 277 kPa, tensile strength from 93 kPa to 421 kPa, and toughness from 243 kJ/m3to 1400 kJ/m3, achieved by modulating the concentrations of acrylamide (AM) and Fe3O4nanoparticles. These hydrogels exhibit rapid heating under an alternating magnetic field, reaching 44.4 °C within 600 s at 15 wt%, demonstrating the potential for use in mild magnetic hyperthermia. Furthermore, the integration of Fe3O4nanoparticles and nanoclay into the AM precursor optimizes the rheological properties and ensures high printability, enabling the fabrication of complex, high-fidelity structures through extrusion-based 3D printing. Compared to existing magnetic hydrogels, our 3D-printable platform uniquely combines adjustable mechanical properties, strong adhesion, and multifunctionality, offering enhanced capabilities for use in magnetic actuation and hyperthermia in biomedical applications. This advancement marks a significant step toward the scalable production of next-generation intelligent hydrogels for precision medicine and bioengineering.
研究领域:
生物医学工程
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Anesthesia
·
2024
·Vol. 38
·期 2
·232-243
·
IF 2.8
Zheng Ling-xi,Yu Qian,Li Qiang,Zheng Chuan-dong
Purpose Lidocaine microspheres can prolong the analgesic time to 24–48 h, which still cannot meet the need of postoperative analgesia lasting more than 3 days. Therefore, we added Fe 3 O 4 to the lidocaine microspheres and used an applied magnetic field to attract Fe 3 O 4 to fix the microspheres around the target nerves, reducing the diffusion of magnetic lidocaine microspheres to the surrounding tissues and prolonging the analgesic time. Methods Fe 3 O 4 –lidocaine–PLGA microspheres were prepared by the complex-emulsion volatilization method to characterize and study the release properties in vitro. The neural anchoring properties and in vivo morphology of the drug were obtained by magnetic resonance imaging. The nerve blocking effect and analgesic effect of magnetic lidocaine microspheres were evaluated by animal experiments. Results The mean diameter of magnetically responsive lidocaine microspheres: 9.04 ± 3.23 μm. The encapsulation and drug loading of the microspheres were 46.18 ± 3.26% and 6.02 ± 1.87%, respectively. Magnetic resonance imaging showed good imaging of Fe 3 O 4 –Lidocain–PLGA microspheres, a drug-carrying model that slowed down the diffusion of the microspheres in the presence of an applied magnetic field. Animal experiments demonstrated that this preparation had a significantly prolonged nerve block, analgesic effect, and a nerve anchoring function. Conclusion Magnetically responsive lidocaine microspheres can prolong analgesia by slowly releasing lidocaine, which can be immobilized around the nerve by a magnetic field on the body surface, avoiding premature diffusion of the microspheres to surrounding tissues and improving drug targeting.
研究领域:
药剂学
·
神经科学
·
医学影像学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）