Nano Research
·
2023
·Vol. 16
·期 7
·10164-10174
·
IF 9.9
Sang Min,Liu Shuai,Wu Jianpeng,Wang Xinyi,Zhang Junshuo,Xu Yunqi,Wang Yu,Li Jun,Li Ji,Xuan Shouhu,Gong Xinglong
As intelligent wearable devices, they will inevitably be subjected to various damages and disturbances from the external environment during daily use. Therefore, it is urgent to develop safeguarding materials with multiple protective properties. Herein, this work developed a flexible and breathable three-dimensional (3D) porous shear stiffening elastomer (SSE)/MXene (M-SSE) foam with impact/electromagnetic interference (EMI)/bacteria multiple protection performance for intelligent wearable devices. The continuous conductive MXene network in the 3D SSE porous structure made M-SSE foam exhibit excellent electromagnetic interference shielding property with a high shielding effectiveness of 34 dB. Attributed to the shear stiffening effect of porous SSE matrix, M-SSE foam possessed unique anti-impact and protection properties. The energy dissipation rate reached up to more than 85%, illustrating M-SSE foam could effectively attenuate the external impact force and absorb the impact energy. Inherited from the excellent photothermal performance of MXene, M-SSE foam achieved a considerable saturated temperature of 98 °C under 0.57 W/cm 2 laser power. Therefore, M-SSE foam showed extraordinary antimicrobial property for Staphylococcus aureus according to the principle of photothermal sterilization. Finally, for the development of intelligent wearable devices, conductive M-SSE foam could be used as an intelligent sensor to monitor various human movements owing to the highly sensitive property. This work greatly expanded the application prospect of multifunctional protective materials in various complex environments and promoted the development of multifunctional smart wearable devices in protection field.
研究领域:
材料科学
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纳米技术
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电磁屏蔽
·
生物医学工程
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可穿戴电子设备
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机械工程
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DOI
高影响因子
Pharmaceutics
·
2021
·Vol. 13
·期 9
·1524
·
IF 6.321
Sadikalmahdi Abdella,Souha H. Youssef,Franklin Afinjuomo,Yunmei Song,Paris Fouladian,Richard Upton,Sanjay Garg
Three-dimensional (3D) printing is among the rapidly evolving technologies with applications in many sectors. The pharmaceutical industry is no exception, and the approval of the first 3D-printed tablet (Spiratam®) marked a revolution in the field. Several studies reported the fabrication of different dosage forms using a range of 3D printing techniques. Thermosensitive drugs compose a considerable segment of available medications in the market requiring strict temperature control during processing to ensure their efficacy and safety. Heating involved in some of the 3D printing technologies raises concerns regarding the feasibility of the techniques for printing thermolabile drugs. Studies reported that semi-solid extrusion (SSE) is the commonly used printing technique to fabricate thermosensitive drugs. Digital light processing (DLP), binder jetting (BJ), and stereolithography (SLA) can also be used for the fabrication of thermosensitive drugs as they do not involve heating elements. Nonetheless, degradation of some drugs by light source used in the techniques was reported. Interestingly, fused deposition modelling (FDM) coupled with filling techniques offered protection against thermal degradation. Concepts such as selection of low melting point polymers, adjustment of printing parameters, and coupling of more than one printing technique were exploited in printing thermosensitive drugs. This systematic review presents challenges, 3DP procedures, and future directions of 3D printing of thermo-sensitive formulations.Keywords:3D printing;thermolabile;thermosensitive;FDM;SSE;SLA;DLP
研究领域:
制药工程
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
International Review of Financial Analysis
·
2024
·
IF 7.5
Shengpeng Zhang,Yaokuang Li,Yu He,Ruixin Liang
In this study, we investigate whether vocal cues expressed by management in IPO online roadshows in the SSE STAR Market play an information role. Using deep learning techniques, we classify the emotional tendencies of vocal cues in IPO online roadshows and construct quantitative proxy variables. After a series of empirical analyses, we find that vocal emotions are positively associated with first-day stock returns after IPO. In addition, we find that vocal emotions have predictive power for future operating performance after IPO. Our findings still hold after a series of robustness checks. Through additional analyses, we provide evidence that information content in the prospectus and investor sentiment play moderating and mediating roles, respectively, in the relationship between vocal emotions and the first-day stock returns after IPO. Moreover, we find that the vocal emotions expressed in the presentation section and the management tone in the Q&A section develop synergistic effects. Finally, we find that the information role played by vocal emotions exhibits timeliness. Our findings elucidate the information role of vocal cues and highlight the importance of IPO online roadshows in the SSE STAR Market.
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DOI
高影响因子
PLANT AND SOIL
·
2014
·Vol. 382
·期 1
·103-115
·
IF 3.235
Duan Dechao,Peng Cheng,Xu Chen,Yu Mingge,Sun Lijuan,Worden Natasha,Shi Jiyan,Hu Tiandou
Background and aims Metal species in rhizosphere soil profoundly influence their mobility and phytoavailability. Clarifying the speciation transformation of heavy metals helps understand their translocation and accumulation in plants. Methods Single extraction, selective sequential extraction (SSE) and X-ray absorption near-edge structure (XANES) spectroscopy were employed to investigate the speciation transformation of lead (Pb) and its influence on metal accumulation in tea plants after the addition of tea polyphenols (TPs). Results Pb content was decreased in young leaves and stems, whereas increased in roots, after TPs were amended to soil. Both SSE and XANES analysis suggested bioavailable Pb was transformed to organically bound Pb after the addition of TPs. The increased percentage of organically bound Pb might be fixed in the cell wall of plant root through a ternary complex formed between the Pb-organic matter complex and cell wall components. Therefore, Pb translocation from roots to young tissues was decreased. Conclusions Pb phytoavailability change was driven by its speciation transformation after the addition of TPs. Combined SSE and XANES spectroscopy represent powerful tools to study metal speciation transformation in plant and soil systems.
研究领域:
环境科学
·
植物学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xianbo Yu,Feng Yan,Bo Geng,Xiaoming Bai,Chenghao Zhao,Ming Wang,Yang Zhao,Guangyu Zhao,Xitian Zhang
The Gibbs free energy of hydrogen adsorption at the edge of molybdenum disulfide (MoS 2 ) is close to that of Pt, meaning that MoS 2 is the best candidate to replace Pt-based materials. However, easy agglomeration between layers to mask active sites, lack of catalytic activity in the basal planes, and poor electronic conductivity make MoS 2 exhibit dissatisfactory hydrogen evolution reaction (HER) catalytic performance. Here, we successfully construct a van der Waals heterostructure stacked alternately with Mo(SSe) 2-x and graphene (Mo(SSe) 2-x /G) to enhance its catalytic ability. The introduction of Se into MoS 2 and the thermal treatment induce the sample to generate more anion vacancies. Theoretical and experimental results demonstrate the constructed van der Waals heterostructure, the introduced Se element, and the increased anion vacancies are in favor of promoting the number of active sites and improving the electronic conductivity of the catalyst. Therefore, Mo(SSe) 2-x /G exhibits superior HER catalytic performance (the overpotentials of 137 mV and 136 mV at a current of 10 mA cm −2 ) and long-term stabilities (>90 h and 140 h at a current density of 20 mA cm −2 ) in both acidic and alkaline media.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiyuan Tao,Li Yang,Jiali Liu,Zihao Zang,Peng Zeng,Changfei Zou,Lingguang Yi,Xiaoyi Chen,Xiaolin Liu,Xianyou Wang
Garnet-type Li 7 La 3 Zr 2 O 12 (LLZO) is a promising solid-state electrolyte (SSE) for next generation lithium batteries due to its high Li + conductivity and stability against lithium metal, especially the Li 7−3x Ga x La 3 Zr 2 O 12 (Ga-LLZO) is most valuable because of its high ionic conductivity (> 1 ×10 −3 S cm −1 ). However, it is difficult to prepare high-quality Ga-LLZO by the traditional air ambient sintering. Herein, we develop a simple and efficient rapid ultra-high-temperature sintering (RUHTS) method to prepare high-conductivity Ga-LLZO ceramic SSE. It has been found that the as-prepared Ga-LLZO ceramic SSE with the composition of Li 6.25 Ga 0.25 La 3 Zr 2 O 12 exhibits high relative density of 99%, good ionic conductivity of 1.48 × 10 −3 S cm −1 and large critical current density of 0.5 mA cm −2 after sintering at 1200 °C for 2 min. In addition, the Ga-LLZO SSE shows good electrochemical stability and interfacial compatibility against Li metal. The assembled Li-Li symmetric cell represents a small interfacial impedance of 37 Ω cm 2 . In the same time, the Li/Ga-LLZO/LE+LMNCO full battery has a total impedance of 205 Ω cm 2 , and can deliver a first discharge capacity of 235.1 mAh g −1 at 0.5 C, and the capacity retention rate is 88.3% after 100 cycles. This indicates that the as-prepared Ga-LLZO has good application prospect in the Li-metal solid-state batteries (LMSSBs). Moreover, this method does not require the use of mother powder during preparation process, which will effectively reduce the waste of raw materials, save manufacture costs and be beneficial to quantity production of Ga-LLZO ceramic electrolyte.
研究领域:
材料科学
·
电化学
·
电池技术
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DOI
高影响因子
Energy Technology
·
2018
·Vol. 7
·期 1
·122-130
·
IF 3.175
Shi Wang,Hao Xu,Ailian Wang,Xu Liu,Jie Chen,Zhinan Wang,Di Feng,Qinghui Zeng,Liaoyun Zhang
An inorganic-polymeric hybrid all-solid-state electrolyte (SSE) composed of chemically modified nano-silica, linear poly(trifluoroethyl methacrylate)-co-poly(poly(ethylene glycol) methyl ether methacrylate copolymer (PTFEMA-co-PPEGMA or LCP) and lithium salt is prepared and used in lithium-ion batteries (LIBs) for the first time. Nano-silica is transformed to SiO 2 -SH via esterification reaction. Then, SiO 2 -PEGMA is synthesized through click chemistry of SiO 2 -SH and PEGMA. The compatibility of the nano-SiO 2 and the LCP can be effectively improved due to the excellent dispersibility of the chemically modified nano-SiO 2 in the polymer matrix. As a result, the hybrid SSE has good thermal stability, excellent film-forming ability. Furthermore, the hybrid SSE shows superior comprehensive electrochemical properties, which makes the corresponding LiFePO 4 /Li cells have good cycling performance (the discharge capacity reaches 144 mAh g −1 at 0.3 C) and rate capability (90 mAh g −1 is reached at 1 C). Thus, the hybrid electrolyte can be a powerful SSE for high-safety and high-performance LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Tianze Jiang,Bingjie Wang,Teng Wang,Lianxiao Zhang,Xiangyan Chen,Xia Zhao
Immunotherapy is regarded as a prospective strategy against metastatic cancer. However, tumor-associated macrophages (TAMs), which accumulate in hypoxic tumor microenvironment, reduce the effectiveness of immunotherapy by blocking or “hijacking” the initiation of the immune response. Here, a novel tumor-targeted nanoplatform loaded with hypoxia-pathway-intervened docosahexaenoic acid (DHA) and chemotherapeutic drug carfilzomib (CFZ) is developed, which realizes the rescue of TAM-hijacked immune response and effective metastatic cancer immunotherapy. DHA is conjugated to fucoidan (Fuc) via a reduction cleavable selenylsulfide bond (SSe) for micelle preparation, and CFZ is encapsulated in the hydrophobic cores of micelles. The functionalized nanoplatforms (Fuc─SSe─DHA (FSSeD)–CFZs) induce immunogenic cell death, inhibit hypoxia-inducible factor-1α expression, and improve immunosuppression by TAM suppression. FSSeD–CFZs enhance immune response against primary tumor development and metastasis formation. In brief, the novel rescue strategy for TAM-hijacked immunoreaction by inhibiting hypoxia pathway has the potential and clinically translational significance for enhanced metastatic cancer immunotherapy.
研究领域:
癌症免疫治疗
·
药学
·
纳米技术
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）