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Three-dimensional MXene/carbon nanotube composite electrodes in flexible 64-channel arrays for noninvasive electromyography signal acquisition

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science China Materials 2024年第9期67卷 2977-2984页

作者： Lian Cheng Aiying Guo Jun Li Mengjiao Li Qiang Lei Wen Xu Xiaolin Guo Jianhua Zhang School of Microelectronics Shanghai UniversityShanghai201800China Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghai200072China

Non-invasive surface electromyography(sEMG)electrodes have vast potential in fields such as healthcare,human-computer interaction,and entertainment,providing diverse information related to electromyographic ***-invasive sEMG electrodes reduce user risks but gather sEMG signals of lower quality compared to invasive ***,various advanced electrode materials have been developed for detecting physiological electrical signals,but the majority of them are single channel ***,we report 64-channel three-dimensional(3D)Ti_(3)C_(2)MXene/CNT composite electrodes fabricated using bonding-driven self-assembly *** electrodes are characterized by low skin-electrode contact impedance and a high signal-to-noise ratio(SNR)for collection of EMG *** electrode arrays exhibit remarkable flexibility,conforming seamlessly to the skin’s ***,the skin-electrode contact impedance of 3D Ti_(3)C_(2)MXene/CNT electrodes decreases by 10-fold compared to Ag/AgCl gel electrodes at a frequency of 100 ***,when collecting sEMG signals from the arm,the prepared Ti_(3)C_(2)MXene/CNT electrodes exhibit lower baseline noise and higher SNR compared to Ag/AgCl gel ***,Ti_(3)C_(2)MXene/CNT electrodes can collect sEMG signals of different hand gestures,while maintaining a high SNR(∼25 dB).By combining machine learning,sEMG signals from different gestures can be identified with a recognition rate exceeding 90%.The exceptional performance and scalability of these 3D Ti_(3)C_(2)MXene/CNT electrodes indicate a promising future for shaping electronic skin and wearable device technologies.

关键词： electrodes surface electromyography skin-contact impedance Ti_(3)C_(2)MXenes CNTs

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Design of tightly linked dual ring antenna and imaging of magnetic field distribution using a diamond fiber probe

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Chinese Physics B 2024年第2期33卷 347-352页

作者：叶青云薛雅文何飞越赵旭彤卞雨辰卢文韬王金旭陈鸿浩夏圣开曾明菁杜关祥 College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China College of science Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Computer science Nanjing University of Posts and TelecommunicationsNanjing 210023China Bell Honors School Nanjing University of Posts and TelecommunicationsNanjing 210023China

A tightly linked dual ring antenna is designed,and it is specifically tailored for uniformly coupling the microwave magnetic field to the nitrogen-vacancy(NV)*** designed antenna operates at a center frequency of about 2.87 GHz,with a bandwidth of around 200 MHz,allowing it to address multiple resonance peaks in the optically detected magnetic resonance(ODMR)spectrum in an external magnetic ***,the antenna generates a fairly uniform magnetic field in a range with a radius of 0.75 *** resolution imaging of the magnetic field distribution on the surface of the antenna is conducted by using a fiber diamond *** also investigate the effect of magnetic field uniformity on the linewidth of ODMR,so as to provide insights into reducing the inhomogeneous broadening of ODMR.

关键词： nitrogen vacancy(NV) microwave(MW)imaging inhomogeneous broadening

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High-resolution imaging of magnetic fields of banknote anti-counterfeiting strip using fiber diamond probe

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Chinese Physics B 2024年第4期33卷 720-727页

作者：赵旭彤何飞越薛雅文马文豪殷筱晗夏圣开曾明菁杜关祥 College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China College of science Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Computer science Nanjing University of Posts and TelecommunicationsNanjing 210023China Bell Honors School Nanjing University of Posts and TelecommunicationsNanjing 210023China

Counterfeiting of modern banknotes poses a significant challenge,prompting the use of various preventive *** such measure is the magnetic anti-counterfeiting ***,due to its inherent weak magnetic properties,visualizing its magnetic distribution has been a longstanding *** this work,we introduce an innovative method by using a fiber optic diamond probe,a highly sensitive quantum sensor designed specifically for detecting extremely weak magnetic *** employ this probe to achieve high-resolution imaging of the magnetic fields associated with the RMB 50denomination anti-counterfeiting ***,we conduct computer simulations by using COMSOL Multiphysics software to deduce the potential geometric characteristics and material composition of the magnetic region within the anti-counterfeiting *** findings and method presented in this study hold broader significance,extending the RMB 50 denomination to various denominations of the Chinese currency and other items that employ magnetic anti-counterfeiting *** advances have the potential to significantly improve and promote security measures in order to prevent the banknotes from being counterfeited.

关键词： banknote anti-counterfeiting strip nitrogen-vacancy(NV)centers magnetic field imaging numerical simulation

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Nomogram based on liver stiffness and spleen area with ultrasound for posthepatectomy liver failure:A multicenter study

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World Journal of Gastroenterology 2024年第27期30卷 3314-3325页

作者： Guang-Wen Cheng Yan Fang Li-Yun Xue Xiao-Hui Qiao Xue-Qi Li Yan Zhang Jia Guo Xiao-Yan Xie Hong Ding Department of Ultrasound Huashan HospitalFudan UniversityShanghai 200040China Department of Ultrasound Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Medical Ultrasonics Institute of Diagnostic and Interventional UltrasoundSun Yat-sen University First Affiliated HospitalGuangzhou 510080Guangdong ProvinceChina Institute of Ultrasound in Medicine and Engineering Shanghai Cancer CenterShanghai 200040China Department of Ultrasound Eastern Hepatobiliary Surgical HospitalSecond Military Medical UniversityShanghai 200433China Department of Ultrasound National Clinical Research Center for Aging and MedicineHuashan HospitalFudan UniversityShanghai 200040China

BACKGROUND Liver stiffness(LS)measurement with two-dimensional shear wave elastography(2D-SWE)correlates with the degree of liver fibrosis and thus indirectly reflects liver function *** size of the spleen increases due to tissue proliferation,fibrosis,and portal vein congestion,which can indirectly reflect the situation of liver fibrosis/*** was reported that the size of the spleen was related to posthepatectomy liver failure(PHLF).So far,there has been no study combining 2D-SWE measurements of LS with spleen size to predict *** prospective study aimed to investigate the utility of 2D-SWE assessing LS and spleen area(SPA)for the prediction of PHLF in hepatocellular carcinoma(HCC)patients and to develop a risk prediction *** To investigate the utility of 2D-SWE assessing LS and SPA for the prediction of PHLF in HCC patients and to develop a risk prediction *** This was a multicenter observational study prospectively analyzing patients who underwent hepatectomy from October 2020 to March *** 1 wk before partial hepatectomy,ultrasound examination was performed to measure LS and SPA,and blood was drawn to evaluate the patient’s liver function and other *** absolute shrinkage and selection operator logistic regression and multivariate logistic regression analysis was applied to identify independent predictors of PHLF and develop a *** performance was validated *** diagnostic performance of the nomogram was evaluated with receiver operating charac-teristic curve compared with the conventional models,including the model for end-stage liver disease(MELD)score and the albumin-bilirubin(ALBI)*** A total of 562 HCC patients undergoing hepatectomy(500 in the training cohort and 62 in the validation cohort)were enrolled in this *** independent predictors of PHLF were LS,SPA,range of resection,blood loss,international normalized ratio,and total *** diagnostic performanc

关键词： Shear-wave elastography Spleen Hepatectomy Posthepatectomy liver failure Hepatocellular carcinoma

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Trace Pd alloyed with Au to boost Au/uncalcined TS-1 catalyzed propane hydro-oxidation to acetone

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Nano Research 2024年第8期17卷 7182-7193页

作者： Jinwei Sun Zhihua Zhang Erchuan Yang Wei Du Fan Liu Kesheng Xu Yuxia Zhong Xuezhi Duan Xinggui Zhou State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

Selective oxidation of propane to acetone(AC)with H_(2) and O_(2) provides a direct route to convert low-cost propane into valueadded ***,the catalytic activity of conventional Au/Ti-based catalysts is constrained by the high energy barrier for H_(2) ***,uncalcined TS-1 supported Au-Pd bimetallic catalysts were prepared,and the relationship between the active-site structure and corresponding performance in the selective oxidation of propane with H_(2) and O_(2) in the gas phase was systematically *** contrast to the liquid-phase reaction,trace Pd alloyed with Au triggered an increase in both catalytic activity and selectivity,in which Au_(20)-Pd_(1)/TS-1-B catalyst exhibited excellent activity(170 gAC·h^(−1)·kgcat^(−1))and AC selectivity(90.6%),much higher than those of the Au/TS-1-B catalyst(AC formation rate of 100 gAC·h^(−1)·kgcat^(−1)and AC selectivity of 86.3%).It was found that Pd was gradually isolated into monomers with the increase of Au/Pd molar ratio,and the synergy between Pd single atoms and Au improved the catalytic performance via enhancing hydrogen dissociation and modulating the electronic structure of ***,the reaction conditions were optimized based on the kinetics studies and the Au_(20)-Pd_(1)/TS-1-B catalyst exhibited enhanced H_(2) selectivity(45%)and long-term stability(over 130 h).The insights gained here can offer valuable guidance for the design of Au-Pd catalysts applicable to other gas-phase oxidation reactions.

关键词： propane selective oxidation acetone hydrogen dissociation Au-Pd alloy synergy

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Injectable Nanorobot-Hydrogel Superstructure for Hemostasis and Anticancer Therapy of Spinal Metastasis

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Nano-Micro Letters 2024年第12期16卷 59-80页

作者： Qing Chen Miao Yan Annan Hu Bing Liang Hongwei Lu Lei Zhou Yiqun Ma Chao Jia Dihan Su Biao Kong Wei Hong Libo Jiang Jian Dong Department of Orthopaedic Surgery Zhongshan HospitalFudan UniversityShanghai 200032People’s Republic of China Department of Chemistry Fudan UniversityShanghai 200438People’s Republic of China Department of Surgery Yong Loo Lin School of MedicineNational University of Singapore1E Kent Ridge RoadSingapore 119228Singapore Department of Geriatrics and Gerontology Huadong HospitalFudan UniversityShanghai 200438People’s Republic of China State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200438People’s Republic of China Department of Orthopaedic Surgery Zhongshan Hospital Wusong Branch Fudan UniversityShanghai 200940People’s Republic of China

Surgery remains the standard treatment for spinal ***,uncontrolled intraoperative bleeding poses a significant challenge for adequate surgical resection and compromises surgical *** this study,we develop a thrombin(Thr)-loaded nanorobothydrogel hybrid superstructure by incorporating nanorobots into regenerated silk fibroin nanofibril *** superstructure with superior thixotropic properties is injected percutaneously and dispersed into the spinal metastasis of hepatocellular carcinoma(HCC)with easy bleeding characteristics,before spinal surgery in a mouse *** near-infrared irradiation,the self-motile nanorobots penetrate into the deep spinal tumor,releasing Thr in a controlled ***-induced thrombosis effectively blocks the tumor vasculature and reduces bleeding,inhibiting tumor growth and postoperative recurrence with Au nanorod-mediated photothermal *** minimally invasive treatment platform provides a novel preoperative therapeutic strategy for HCC spinal metastasis effectively controlling intraoperative bleeding and tumor growth,with potentially reduced surgical complications and enhanced operative outcomes.

关键词： Silk fibroin Nanofibril hydrogels Nanorobots Thrombin Spinal metastasis

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Advanced nano-based strategies for mRNA tumor vaccine

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Acta Pharmaceutica Sinica B 2024年第1期14卷 170-189页

作者： Yangqi Qu Jingjing Xu Tong Zhang Qinjun Chen Tao Sun Chen Jiang Key Laboratory of Smart Drug Delivery(Ministry of Education) Minhang HospitalState Key Laboratory of Medical NeurobiologyDepartment of PharmaceuticsSchool of PharmacyFudan UniversityShanghai 201203China

Tumor vaccine is a promising strategy for cancer immunotherapy by introducing tumor antigens into the body to activate specific anti-tumor immune *** with the technological breakthroughs in genetic engineering and delivery systems,messenger ribonucleic acid(mRNA)technology has achieved unprecedented development and application over the last few years,especially the emergency use authorizations of two mRNA vaccines during the COVID-19 pandemic,which has saved countless lives and makes the world witness the powerful efficacy of mRNA technology in ***,unlike infectious disease vaccines,which mainly induce humoral immunity,tumor vaccines also need to activate potent cellular immunity to control tumor growth,which creates a higher demand for mRNA delivery to the lymphatic organs and antigen-presenting cells(APCs).Here we review the existing bottlenecks of mRNA tumor vaccines and advanced nano-based strategies to overcome those challenges,as well as future considerations of mRNA tumor vaccines and their delivery systems.

关键词： mRNA vaccine Nanoparticle Tumor vaccine Delivery system Stability Targeting Transfection Immunogenicity

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Large-Scale Preparation of Mechanically High-Performance and Biodegradable PLA/PHBV Melt-Blown Nonwovens with Nanofibers

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Engineering 2024年第8期39卷 244-252页

作者： Gaohui Liu Jie Guan Xianfeng Wang Jianyong Yu Bin Ding shanghai Frontier science Research Center of Advanced Textiles College of TextilesDonghua UniversityShanghai 201620China College of Materials science and Engineering Qingdao UniversityQingdao 266071China

Biodegradable polylactic acid(PLA)melt-blown nonwovens are attractive candidates to replace nondegradable polypropylene melt-blown ***,it is still an extremely challenging task to prepare PLA melt-blown nonwovens with sufficient mechanical properties for practical ***,we report a simple strategy for the large-scale preparation of biodegradable PLA/poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)melt-blown nonwovens with high strength and excellent *** this process,a small amount of PHBV is added to PLA to improve the latter’s crystallization rate and *** addition,when the PHBV content increases from 0 to 7.5 wt%,the diameters of the PLA/PHBV melt-blown fibers decrease significantly(with the proportion of nanofibers increasing from 7.7%to 42.9%).The resultant PLA/PHBV(5 wt%PHBV)melt-blown nonwovens exhibit the highest mechanical *** tensile stress,elongation,and toughness of PLA/PHBV(5 wt%PHBV)melt-blown nonwovens reach 2.5 MPa,45%,and 1.0 MJm3,*** importantly,PLA/PHBV melt-blown nonwovens can be completely degraded into carbon dioxide and water after four months in the soil,making them environmentally friendly.A general tensile-failure model of melt-blown nonwovens is proposed in this study,which may shed light on mechanical performance enhancement for nonwovens.

关键词： PLA PHBV Melt-blown Biodegradable Strength Toughness

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Complex-frequency waves:beat loss and win sensitivity

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Light(science & Applications) 2024年第2期13卷 181-183页

作者： Qingqing Cheng Tao L School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China Department of Respiratory Diseases and Critical Medicine Quzhou Hospital Affiliated to Wenzhou Medical UniversityQuzhou324000China National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesNanjing UniversityNanjing210093China

Recent experiments have demonstrated that synthesized complex-frequency waves can impart a virtual gain to molecule sensing systems,which can effectively restore information lost due to intrinsic molecular *** enhancement notably amplifies the signal of trace molecular vibrational fingerprints,thereby substantially improving the upper limit of sensitivity.

关键词： thereby Complex limit

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An all-in-one FeO_(x)-rGO sponge fabricated by solid-phase microwave thermal shock for water evaporation and purification

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Journal of Environmental sciences 2024年第4期138卷 671-683页

作者： Youkun Sun Xiuwen Zhao Xueling Song Jinchen Fan Junhe Yang Yingchun Miao Shuning Xiao School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China College of Chemistry and Environmental science Qujing Normal UniversityQujing 655011China Prytula Igor Collaborate Innovation Center for Diamond Shanghai Jian Qiao UniversityShanghai 201306China

Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of *** much effort made into photothermal materials,there is an urgent need to design a rapidly synthesized photothermal evaporator for the comprehensive purification of complex ***,we report on all-in-one FeOx-rGO photothermal sponges synthesized via solid-phase microwave thermal *** narrow band gap of the semiconductor material Fe_(3)O_(4) greatly reduces the recombination of electron-hole pairs,enhancing non-radiative relaxation light *** abundantπorbitals in rGO promote electron excitation and thermal vibration between the *** of the surface hydrophilicity and hydrophobicity promotes salt resistance while simultaneously achieving the purification of various complex polluted *** optimized GFM-3 sponge exhibitedan enhanced photothermal conversion rate of 97.3% and a water evaporation rate of 2.04 kg/(m^(2)·hr),showing promising synergistic water purification *** findings provide a highly efficient photothermal sponge for practical applicationsof seawater desalination and purification,as well as develop a super-rapid processing methodology for evaporation devices.

关键词： Desalination Photothermal device Microwave synthesis Water purification FeO_(x)-rGO

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