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Force Spectrum of Single CsgA nanofiber Reveal Surprising Properties

作者： Wuqing Tao Riwen Lv Qinqin Tao Department of Radiochemisty China Institute of Atomic Energy State Key Laboratory of Nuclear Resources and Environment East China University of Technology

In this study a novel manganese dioxide modified nanofiber was facile prepared using the electrospinning technique. The as-prepared manganese dioxide/poly(vinyl alcohol)/poly(acrylic acid)(briefly as MnO-PVA/PAA) was firstly characterized by SEM, FT-IR, XRD, stress-strain test and secondly tested as an adsorbent to remove uranium from aqueous solution. Effect of p H, ionic strength, initial uranium concentration, mixing time, temperature on the adsorption, reusability and adsorption mechanism were illustrated. The theoretical adsorption amount of MnO-PVA/PAA calculated as 398.85 mg/g was competitive compared with the reported values. The study proved MnO-PVA/PAA is promising in the uranium removal from aqueous medium.

关键词： Uranium Manganese Dioxide nanofiber Electrospin

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医用生物力学 2019年第A1期34卷 181-181页

作者： Jingqi Lv Yingfeng Li Kai Zhou Pei Guo Ke Ding Quan Long Yang Liu Qi Wang Chao Zhong Botao Xiao School of Biology and Biological Engineering South China University of Technology School of Physical Science and Technology Shanghaitech University Sci-tech Industrial Park Guangzhou University of Traditional Chinese Medicine Co.Ltd. Department of Physics and Astronomy Northwestern University

CsgA protein monomers consist of aβ-helix of five repeat units possessing several conservative residues and thus,inherently *** protein monomers could self-assemble into hierarchical nanofiber structure cross multiple scales after expression and secretion by *** *** researches show that CsgA nanofibers could provide adhesion,stiffness,and mechanical homogeneity for the biofilms,host cells’fibronectin binding for internalization,or protection against phage *** nanofibers have obtained various applications in material science and synthetic *** illustrate,CsgA nanofibers have characteristics of intrinsic hierarchical structures across multiple scales,robustness in harsh environments and programmable functionality via biological *** the force spectrum or mechanical properties of the nanofiber can provide fundamental information of self-assembly process and ultra-stability in extreme *** molecule techniques such as atomic force microscopy,optical tweezers,and magnetic tweezers have been widely applied to study *** these studies,proteins are usually chemically conjugated or genetically constructed to have a tag such as histidine,cysteine or *** engineering requires modification of the plasmids encoding the specific protein,and also involve special protein expression and *** study needs collaboration from *** normally studies one protein at a time which gives out clear signal but lacks throughput and *** we have established a simple method to measure all kinds of proteins without *** carboxyl terminus of a protein is attached to the amine group on a magnetic bead,and the amine terminus of the protein is attached to glutaraldehyde on the glass *** we used magnetic tweezers to manipulate and stretched the bead and *** versus rotation relation was used to identify a single protein or protein *** fiber under tension

关键词： Force Spectrum of Single CsgA nanofiber Reveal Surprising Properties

Small-angle X-ray scattering study on the orientation of suspended sodium titanate nanofiber induced by applied electric field

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Radiation Detection Technology and Methods 2019年第3期3卷 148-154页

作者： Jiayi Wang Xiaoyi Zhao Yunpeng Liu Lixiong Qian Lei Yao Xueqing Xing Guang Mo Quan Cai Zhongjun Chen Zhonghua Wu Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Introduction nanofiber orientation in suspensions determines the performance of nanoparticle suspensions which have potential applications in intelligent *** and method Na2Ti3O7 nanofibers were prepared with a hydrothermal *** orientation degree of Na2Ti3O7 nanofibers in silicone oil has been studied by in situ small-angle X-ray scattering ***ünemann–Ruland method was used to extract the distribution widths of Na2Ti3O7 nanofibers in the *** An empirical formula has been proposed to describe the dependence of nanofiber orientation degree on the external electric-field strength(E)and the nanofiber concentration(C).The results demonstrate that the response of nanofiber orientation to the electric field can be divided into exponential and linear stages before and after the inflection point of electric-field strength(Ec0.09 kV/mm).Low concentration of suspension is more sensitive to the external electric *** increase in nanofiber concentration will decrease the response sensitivity of nanofiber orientation degree to the change of *** critical concentration of Na2Ti3O7 nanofibers in the suspension is about 5 wt%.This study is expected to give new clue for the structurally responsive mechanism of anisotropic nanoparticles in suspensions to electric-field strength and particle concentration.

关键词： Orientation degree Suspension nanofiber SAXS

Molecular-level proton acceptor boosts oxygen evolution catalysis to enable efficient industrial-scale water splitting

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Green Energy & Environment 2024年第2期9卷 344-355页

作者： Yaobin Wang Qian Lu Xinlei Ge Feng Li Le Chen Zhihui Zhang Zhengping Fu Yalin Lu Yang Song Yunfei Bu Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)UNIST-NUIST Energy and Environment Jointed Lab(UNNU)School of Environmental Science and TechnologyNanjing University of Information Science and Technology(NUIST)219 NingliuNanjing210044China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan University220 HandanShanghai200433China Jiangsu Key Laboratory of Advanced Materials and Technology School of Petrochemical EngineeringChangzhou University1 GehuChangzhou213164China Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of China(USTC)96 JinzhaiHefeiAnhui 230026China School of Chemistry and Chemical Engineering Nanjing University of Science and Technology200 Xiaolingwei210094China

Industrial water splitting has long been suppressed by the sluggish kinetics of the oxygen evolution reaction(OER),which requires a catalyst to be ***,we propose a molecular-level proton acceptor strategy to produce an efficient OER catalyst that can boost industrial-scale water ***-level phosphate(-PO_(4))group is introduced to modify the surface of PrBa_(0.5)Ca_(0.5)Co_(2)O_(5)+δ(PBCC).The achieved catalyst(PO_(4)-PBCC)exhibits significantly enhanced catalytic performance in alkaline *** on the X-ray absorption spectroscopy results and density functional theory(DFT)calculations,the PO_(4)on the surface,which is regarded as the Lewis base,is the key factor to overcome the kinetic limitation of the proton transfer process during the *** use of the catalyst in a membrane electrode assembly(MEA)is further evaluated for industrial-scale water splitting,and it only needs a low voltage of 1.66 V to achieve a large current density of 1 A cm^(-2).This work provides a new molecular-level strategy to develop highly efficient OER electrocatalysts for industrial applications.

关键词： Oxygen evolution reaction nanofiber Water splitting Proton acceptor Perovskite

Enhancing photodynamic inactivation via tunning spatial constraint on photosensitizer

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Science China Chemistry 2024年第2期67卷 652-663页

作者： Chong Li Minghao Han Ji Gao Shuxian Wang Song-Bo Lu Yaxi Li Zhao Liu Chen Zhang Zhaojin Wang Fangliang Wang Yuang Sun Chun Loong Ho Kai Wang Yun Shen Kai Li Shenzhen Key Laboratory of Smart Healthcare Engineering Guangdong Provincial Key Laboratory of Advanced BiomaterialsDepartment of Biomedical EngineeringSouthern University of Science and TechnologyShenzhen518055China Department of Chemical and Environmental Engineering University of California RiversideRiverside92521USA Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen518055China

The critical factor of spatial constraint,provided by the external confinement(e.g.,matrix),is often overlooked during photodynamic inactivation,despite playing a crucial role in determining the molecular photophysical process and subsequent antipathogen ***,as a proof-of-concept model,we employed two types of polymers with varying interaction energies with dopants to investigate the intrinsic relationship between spatial constraint and the essential excited-state behaviors of doped photosensitizer(4-(2-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)ethyl)-1-methylquinolin-1-ium iodine,TPP).Through experimental investigation and theoretical calculations,we found that TPP tends to remain in the excited state for a shorter dwell time under weaker spatial constraints due to less restricted molecular motion in polyurethane(PU) ***,the singlet oxygen(^(1)O_(2)) generated from doped-TPP shows a 9.23-fold enhancement in PU than in the polyvinylchloride(PVC) *** light irradiation,the PU@TPP nanofiber can efficiently eliminate the coronavirus MHV-A59(≥99.9997%) at a 220,000-fold higher concentration than the infected *** antibacterial efficacy has also been demonstrated,with a killing rate of ≥99%.

关键词： photodynamic antibacterial singlet oxygen triphenylamine nanofiber

Electrospinning-hot pressing technique for the fabrication of thermal and electrical storage membranes and its applications

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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 1945-1964页

作者： Panpan Che Baoshan Xie Penghui Cao Youfu Lv Daifei Liu Huali Zhu Xianwen Wu Zhangxing He Jian Chen Chuanchang Li Key Laboratory of Renewable Energy Electric-Technology of Hunan Province School of Energy and Power EngineeringChangsha University of Science and TechnologyChangsha 410114China State Key Laboratory of Disaster Prevention&Reduction for Power Grid Changsha University of Science and TechnologyChangsha 410114China School of Chemistry and Chemical Engineering Jishou UniversityJishou 416000China School of Chemical Engineering North China University of Science and TechnologyTangshan 063009China

The combination of electrospinning and hot pressing,namely the electrospinning-hot pressing technique(EHPT),is an efficient and convenient method for preparing nanofibrous composite materials with good energy storage *** emerging composite membrane prepared by EHPT,which exhibits the advantages of large surface area,controllable morphology,and compact structure,has attracted immense *** this paper,the conduction mechanism of composite membranes in thermal and electrical energy storage and the performance enhancement method based on the fabrication process of EHPT are systematically ***,the state-of-the-art applications of composite membranes in these two fields are *** particular,in the field of thermal energy storage,EHPT-prepared membranes have longitudinal and transverse nanofibers,which generate unique thermal conductivity pathways;also,these nanofibers offer enough space for the filling of functional ***,EHPT-prepared membranes are beneficial in thermal management systems,building energy conservation,and electrical energy storage,e.g.,improving the electrochemical properties of the separators as well as their mechanical and thermal *** application of electrospinning-hot pressing membranes on capacitors,lithium-ion batteries(LIBs),fuel cells,sodium-ion batteries(SIBs),and hydrogen bromine flow batteries(HBFBs)still requires *** the future,EHPT is expected to make the field more exciting through its own technological breakthroughs or be combined with other technologies to produce intelligent materials.

关键词： electrospinning-hot pressing technique thermal storage electrical storage composite membranes nanofiber

Research on Electromagnetic Wave Absorption Based on Electrospinning Technology

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Chinese Journal of Chemistry 2024年第7期42卷 777-789页

作者： Baoding Li Jing Qiao Yue Liu Haoyuan Tian Wei Liu Qilei Wu Zhou Wang Jiurong Liu Zhihui Zeng Key Laboratoryfor Liquid-Solid StructuralEvolution and Processing of Materials Schoolof Materials Science and EngineeringShandong UniversityJinanShandong 250061China China North Industries Group 53rd Research Institute JinanShandong 250000China School of Mechanical Engineering Shandong UniversityJinanShandong 250061China Institute of Crystal Materials State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong 250100China Shenzhen Research Institute of Shandong University ShenzhenGuangdong 518057China Science and Technology on Electromagnetic Compatibility Laboratory China Ship Development and Design CentreWuhanHubei 430064China suzhou Research Institute of Shandong University SuzhouJiangsu215123China

At present,in order to overcome electromagnetic interference and prevent electromagnetic harm,the research of new and efficient electromagnetic wave absorbing materials has become the research focus in the field of materials *** one-dimensional structure can promote the impedance matching and attenuation characteristics of the absorbing ***,as an effective method to prepare nanofibers with high length-diameter ratio,has been widely concerned because it is suitable for struc-tural design of various *** this paper,the research progress and absorption properties of nano-fiber materials prepared by electrospinning combined with different processes are introduced.

关键词： Electromagnetic wave(EMW)absorbing Electrospinning nanofiber Impedance matching Nanocomposite

Ni_(3)Fe/Ni_(4)S_(3)/Ni/C Mixed Crystal Composite nanofibers Prepared by Electrospinning and Heat Treatment Methods for Oxygen Evolution Reaction

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Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 267-273页

作者： LI Tao ZHONG Shujie LOU Qiongyue LING Shuai CHEN Jian MA Guohua YANG Mao WU Xiaoqiang Department of Materials Engineering School of Mechanical EngineeringChengdu UniversityChengdu610106China Material Corrosion and Protection Key Laboratory of Sichuan Province Zigong643000China Analysis and Testing Center Southwest University of Science and TechnologyMianyang621010China

OER catalyst of Ni_(3)Fe/Ni_(4)S_(3)/Ni/C(NiFeSC series)mixed crystal composite nanofibers was prepared by electrospinning and atmospheric heat treatment *** testing results indicate that the diameters of Ni_(3)Fe/Ni_(4)S_(3)/Ni/C composite nanofibers is about 200 nm,the grains size is about 1-3 nm,and the fiber surface is *** electrochemical test results show that the heterojunction of the prepared Ni_(3)Fe/Ni_(4)S_(3)/Ni/C hybrid crystal composite nanofiber has synergistic effect with sulfide,and exhibits good electrocatalytic activity of water decomposition and OER in alkaline *** OER electrocatalytic performance of Ni_(3)Fe/Ni_(4)S_(3)/Ni/C composite electrode prepared via a heat treatment at 1000℃process was tested in 1 mol/L KOH *** results show that the overpotential is about 298 mV,the Tafel slope is about 74 mV?dec-1,and the surface resistance is about 1.69Ω·cm^(2),at the current density of 10 mA·cm^(-2).

关键词： mixed crystal composite material nanofiber NiFeSC oxygen evolution reaction(OER)

Biological properties of self-assembled nanofibers of elastin-like block polypeptides for tissue-engineered vascular grafts:platelet inhibition,endothelial cell activation and smooth muscle cell maintenance

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Regenerative Biomaterials 2023年第1期10卷 386-395页

作者： Kazuki Natsume Jin Nakamura Kazuhide Sato Chikara Ohtsuki Ayae Sugawara-Narutaki Department of Materials Chemistry Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan Department of Biological Functions Engineering Graduate School of Life Science and Systems EngineeringKyushu Institute of TechnologyFukuoka 808-0196Japan Institute for Advanced Research Nagoya UniversityNagoya 464-8601Japan Department of Respiratory Medicine Graduate School of MedicineNagoya UniversityNagoya 466-8560Japan Department of Energy Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan

Strategic materials design is essential for the development of small-diameter,tissue-engineered vascular ***-assembled nanofibers of elastin-like polypeptides represent promising vascular graft components as they replicate the organized elastin structure of native blood ***,the bioactivity of nanofibers can be modified by the addition of functional peptide *** the present study,we describe the development of a novel nanofiber-forming elastin-like polypeptide(ELP)with an arginine-glutamic acid-aspartic acid-valine(REDV)*** biological characteristics of the REDV-modified ELP nanofibers relevant to applications in vascular grafting were compared to ELP without ligands for integrin,ELP with arginine-glycine-aspartic acid(RGD)sequence,collagen and cell culture *** them,REDV-modified ELP nanofibers met the preferred biological properties for vascular graft materials,i.e.(i)inhibition of platelet adhesion and activation,(ii)endothelial cell adhesion and proliferation and(iii)maintenance of smooth muscle cells in a contractile phenotype to prevent cell *** results indicate that REDV-modified ELP nanofibers represent promising candidates for the further development of small-diameter vascular grafts.

关键词： elastin-like polypeptide nanofiber platelet endothelial cell smooth muscle cell