Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 12
·4300-4306
·
IF 7.393
Yanmin Zhao,Xin Geng,Xinxin Shi,Yifei Guo,Yuanqiang Sun,Lingbo Qu,Zhaohui Li
Developing optical oxygen-sensitive nanoparticles with good biocompatibility and low cost to rapidly detect molecular oxygen in a signal turn-on mode is highly desirable. Herein, we present a phenylenediamine-derived carbon dot (CD), which has been found to display a fluorescence-switchable property, with fluorescence quenching by Na2S2O4 and fluorescence recovery triggered by O2. Because of this unique property, we directly employed the quenched CDs as a reversible probe for the fluorescence turn-on detection of molecular oxygen and found that this detection mode possessed a short response time of 12 s and high sensitivity. Moreover, this CD solution could be used as a writeable ink for the patterning of paper strips and security service without any loss in the fluorescence-switchable property. We thus achieved CD-based test strips for oxygen detection in vacuum packaging. This study not only provides a convenient, low-cost and practical way for oxygen detection but also reveals a fluorescence-switchable CD that will find its applications in numerous O2-involved fields.
研究领域:
化学
·
生物传感
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Advances
·
2025
·
IF 4.7
Li-Ping Wang,Lu-Lu Jiang,Zong-Ze Cui,Zheng-Hui Hu,Le-Ping Miao,Jian-Rong Li,Heng-Yun Ye,Chao Shi
Hybrid perovskites are highly desirable for potential applicationsin optoelectronics. Although luminescent hybrid perovskites have a variety of technically important applications, achieving dielectric transition and near-infrared (NIR) luminescence properties simultaneously is still challenging. Herein, utilizing the NIR-luminescent properties of rare-earth ions, an Nd3+-containing nitrate-bridged hybrid bimetal dielectric, (MQ)5[K2Nd2(NO3)13] (1; MQ = N-methylquinuclidinium cation), was successfully constructed. It exhibited a switchable dielectric constant (ε′) between low- and high-dielectric states along with NIR-luminescent property. The contrast was strikingly reached 1.88, and the was 1.18 times higher than that of silicon nitride. Furthermore, the reversibility of the switchable dielectric constant between the and at 1 MHz was observed after many ε′-switching cycles with no obvious weakening, which endowed this material with the desirable thermodynamic stability. Notably, 1 exhibited NIR photoluminescence at 1068 nm with a fluorescence lifetime of 1.920 μs, and the Nd3+ ion acted as an activator of the NIR luminescence. This finding represents a significant step toward advanced NIR-emissive responsive dielectrics for optoelectronic applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
National Science Review
·
2024
·
IF 16.3
Linghu Changhong,Liu Yangchengyi,Yang Xudong,Li Dong,Tan Yee Yuan,Mohamed Hafiz Mohamed Haziq Bin,Rohani Mohammad Fadhli Bin,Du Zihao,Su Jiangtao,Li Yan,Huo Yucheng,Xu Hanyan,Wang Xiufeng,Wang Yifan,Yu Jing,Gao Huajian,Hsia K Jimmy
Bio-inspired fibrillar adhesives have received worldwide attention but their potentials have been limited by a trade-off between adhesion strength and adhesion switchability, and a size scale effect that restricts the fibrils to micro/nanoscales. Here, we report a class of adhesive fibrils that achieve unprecedented adhesion strength (∼2 MPa), switchability (∼2000), and scalability (up to millimeter-scale at the single fibril level), by leveraging the rubber-to-glass (R2G) transition in shape memory polymers (SMPs). Moreover, R2G SMP fibrillar adhesive arrays exhibit a switchability of >1000 (with the aid of controlled buckling) and an adhesion efficiency of 57.8%, with apparent contact area scalable to 1000 mm2, outperforming existing fibrillar adhesives. We further demonstrate that the SMP fibrillar adhesives can be used as soft grippers and reusable superglue devices that are capable of holding and releasing heavy objects >2000 times of their own weight. These findings represent significant advances in smart fibrillar adhesives for numerous applications, especially those involving high-payload scenarios.
研究领域:
材料科学
·
生物仿生学
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xiaojiang Li,Leitao Sun,Xin Lv,Jie Qi,Hongsheng Lu,Yuanpeng Wu,Baogang wang
Petroleum hydrocarbons pollutants are the serious environmental hazards in the exploitation of petroleum resources. As comparison to the traditional solvent for petroleum hydrocarbons removal, deep eutectic solvents (DESs), as the ideal alternate for organic solvents, have non-toxicity, non-flammability and lower volatility. Whereas, the recycling of DES is still the great challenge for sustainable separation. Herein, hydrophobic DESs (HDESs) with the CO 2 switchable-hydrophilicity are developed, aiming to sustainably separate petroleum hydrocarbons pollutions. The HDESs are formed by hydrogen bonds between the phenolic compounds as hydrogen bond donors (HBDs) and tertiary amines as hydrogen bond acceptors (HBAs), which was demonstrated by the spectroscopic detection. Interestingly, the HDES exhibits better CO 2 -switchable behavior than traditional switchable-solvent, where the phase transition is induced by the protonation of HBA upon CO 2 and the deprotonation of HBD in HCO 3 - solution of HBA. Furthermore, the sustainable separation for oils (heptane, diesel oil and crude oil) is successfully completed, and the HDES is also easily recovered upon N 2 /65 °C. Finally, the HDES is effectively applied in removing petroleum hydrocarbons from oily wastes (oil sands and oily sludge). The results show that more than 98% oil is removed from oil sands, and 85.02% oil is also removed from oily sludge . Thus, the HDESs will be expected to treated as the effective extractant for sustainable and cleaner separation of petroleum hydrocarbons- contaminated waste.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 4
·期 4
·694-703
·
IF 4.726
Jie Deng,Xinyue Liu,Lang Ma,Chong Cheng,Shudong Sun,Changsheng Zhao
The development of biointerfaces with switchable properties is of growing interest for fabricating advanced biomaterials since the adjustment of surface properties can be made on demand. Herein, we report a highly versatile approach for the preparation of a switchable biointerface through a dynamic covalent bond (DCB). The switchability can be achieved via the reversible attaching/detaching of aldehyde end-functionalized biomacromolecules onto/from an acylhydrazide anchored substrate surface. By applying the DCB protocol, three types of well-designed aldehyde end-functionalized biomacromolecules including aldehyde-poly(styrenesulfonate)-co-poly(ethylene glycol)methyl ether methacrylate (Ald-PSP, blood compatible), aldehyde-poly([2-(meth acryloyloxy)ethyl]trimethylammonium chloride) (Ald-PMT, antibacterial), and aldehyde-poly([2-(meth acryloyloxy)ethyl]trimethylammonium chloride-co-poly(ethylene glycol)methyl ether methacrylate) (Ald-PMP, combined antifouling and antibacterial) could be reversibly and alterably immobilized on the substrate surface by switching the pH conditions. As a result, we succeeded in altering the biointerface performances; excellent blood compatibility, antibacterial ability, or combined antifouling and antibacterial capabilities could be alterably achieved on the biointerface, which made the obtained material interfaces more adaptable and capable of satisfying different biofunctional requirements. Moreover, many other properties with specific biofunctions of interests can also be achieved via designing specific aldehyde-terminated molecules.
研究领域:
材料科学
·
生物材料
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER SCIENCE SERIES A
·
2018
·Vol. 60
·期 5
·612-617
·
IF 0.729
Wang Jinjing,Wang Huifeng,Li Yan,Tian Li,Chen Shanmin,Liu Qiang,Guo Zhen
A novel copolymer surfactant has been prepared via a free radical copolymerization of CO 2 -switchable monomer N , N -diethylaminoethyl methacrylate and the hydrophilic monomer sodium vinyl-sulfonate and characterized. The results of conductivity, dynamic light scattering and cryogenic transmission electron microscopy study showed the change of the microstructure of copolymer in water by adding or removing of CO 2 . The copolymer aqueous solution was found to exhibit reversible switchability by the bubbling of CO 2 /N 2 .
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Zheng Li,Qing-Qing Wu,Yazhou Wang,Peng Lin,Jing-Juan Xu,Hong-Yuan Chen,Wei-Wei Zhao
The study on aqueous reservoir computing (RC) has just come into being. Nevertheless, aqueous RC still faces significant challenges. Recently, with the participation of real biological receptors, aqueous neuromorphic engineering is promising to emulate the intricate human brain more closely due to their synaptic resemblance in electrolytes. In this work, biologically switchable volatility and nonvolatility are first explored for real neurotransmitter glutamate-mediated aqueous RC application, which is based on rational synergy between glutamate oxidase catalytic chemistry and porphyrin-based metal-organic framework/tungsten oxide (PCN-224/WO 3 ) photogate in the newly emerged organic photoelectrochemical transistor. As a proof of concept, the glutamate-mediated RC is then developed and explored for image recognition. These results have of potential for advancing real neurotransmitter-mediated aqueous RC toward in-biology application, which are also envisaged to promote bioinspired algorithm-hardware codesign in future aqueous neuromorphic engineering.
研究领域:
神经科学
·
生物医学工程
·
分子生物学
·
纳米医学
·
生物电子学
·
类脑计算
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Jingtao Zhou,Yonglin Yan,Xiaohan Tao,Lei Zhang,Rongjie Ma,Xu Cai,Dexin Yang,Yingxin Chen
Balancing the contradict factors of high-dielectric-constant ( K) and high-breakdown-strength ( E b ) becomes a major obstacle that hinders the development of high-power-density ( U e ) dielectric capacitors. Herein, we successfully synthesize a high- E b and medium- K dielectrics of fluorinated aromatic polythiourea (F-ArPTU) via microwave radiation polymerization, and develop a high- U e relaxor dielectrics comprising of a high- K poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene) (RFPs) and a high- E b F-ArPTU. Due to crystallization-induced separation, ultrahigh-insulation F-ArPTU can be segregated to the periphery of RFPs crystals, which is beneficial for suppressing dipole-dipole coupling to form smaller relaxor crystals in the composites compared with pristine RFPs. The confined effect of RFPs crystals results in not only balancing the contradict factors of high- K and high- E b , but also improving the capability of dipole switchablity, thereby achieving high- U e , and low loss in the composite system. For instance, the relaxor dielectrics RFPs with 20 wt% F-ArPTU possesses a relatively high- U e of 10.2 J cm −3 at the field of 320 MV m −1 , which is higher than that of biaxially oriented polypropylene (BOPP) and other all-organic dielectric polymers. As an all-organic capacitor prototype, the 20F-ArPTU/RFPs capacitor with a dimension of 5 × 5 cm 2 enable five times higher efficacy on power supply for electronic devices than the benchmark BOPP capacitors.
研究领域:
材料科学
·
高分子科学
·
电气工程
·
介电材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xin Liang,Sheng Wang,Jing Zhou,Tengfei Lu,Kaiyu Ruan,Yuqian Xia,Tong Wang
Despite the considerable attention received by switchable solvents in natural product extraction and biorefinery. To tackle this issue, the present study has the following innovative endeavors: (1) Developing an innovative high-speed homogenization assisted extraction method using the DES/SHS/H 2 O system and applying it to the integrated extraction of phenolics, flavonoids, and essential oil from Flos Chrysanthemi Indici . The switching process was characterized using 1 H NMR, the extraction process was optimized employing response surface methodology, the components of extracted essential oils were analyzed by GC–MS, and the cytotoxicity and anti-inflammatory activity of essential oils were determined through MTT and ELISA. Our findings demonstrate that the incorporation of DES can significantly augment the CO 2 switching kinetics of SHS, resulting in a 32.7 % reduction in switching time and a remarkable decrease of 73.7 % residual content within the aqueous phase. The innovative DES/SHS/H 2 O based extraction method exhibited substantial enhancements in phenolics, flavonoids, and essential oil extraction efficiency compared to conventional approaches, yielding extracts with superior chemical profiles and enhanced anti-inflammatory activity. Therefore, the proposed strategy of enhancing the CO 2 switching kinetic properties and extraction ability of SHS by incorporating DES is feasible, providing valuable guidance for the rational design of innovative smart solvent systems. The developed DES/SHS/H 2 O system, exhibiting improved performance, holds significant application and research prospects.
研究领域:
化学工程
·
药学
·
分析化学
·
生物技术
·
天然产物研究
✓ 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）