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Facile Fabrication of Core-Shell Structure Fe_(3)O_(4)@C nanodots for Enhanced Lithium-Sulfur Batteries

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 410-416页

作者： Xiang-Rui He Yu-Jiao Zhang Li-Fan Yang Ji-Lu Zhao Hong-Tai Li Yi-Bo Gao Bao Wang Xiao-Dong Guo School of Chemical Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Biochemical Engineering.Instituteof Process Engineering Chinese Academy of SciencesBeijing 100190China School of Chemistry Sun Yat-Sen UniversityGuangzhou 510275China

Lithium sulfur battery(LSB) is widely considered as a next-generation battery system due to its high theoretical energy density of 2567 Wh ***,several inherent issues obstruct the business application of *** address these issues,we assemble core-shell structure Fe_(3)O_(4)@C nanodots with 5 nm diameter as a valid sulfur host via a convenient organic pyrolysis treatment followed by *** nanosized Fe3O4 particles could expose more chemisorption sites and inhibit the polysulfides ***,the carbon layer could not only increase the conductivity but also ensure structural integrity during cyclic ***,the mesoporous channels around Fe_(3)O_(4)@C could supply sufficient space to load sulfur and physically restrict the shuttle of ***,the resultant S/Fe_(3)O_(4)@C cathode shows a highly initial capacity of 1089 mAh g^(-1) at 0.2 C,even retains 655 mAh g^(-1) over 200 cycles at 1 C.

关键词： Fe(3)O_(4) nanodots Cathode Lithium–sulfur batteries

Infrared fluorescence imaging of infarcted hearts with A@S nanodots

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Nano Research 2019年第4期12卷 749-757页

作者： Dirk H. Ortgies Angel Luis Garcia-Villalon Miriam Granado Sara Amor Emma Martin Rodriguez Harrisson DA Santos Jingke Yao Jorge Rubio-Retama Daniel Jaque Nanobiology Group Instituto Ramon y Cajal de Investigacion Sanitaria IRYCIS Ctra. Colmenar km. 9.100 Madrid 28034 Spain Fluorescence Imaging Group Departamento de Fisica de Materiales - Facultad de Ciencias Universidad Autonoma de Madrid C/ Francisco Tomas y Valiente 7 Madrid 28049 Spain Fluorescence Imaging Group Departamento de Fisiologia - Facultad de Medicina Avda. Arzobispo Morcillo 2 Universidad Autonoma de Madrid Madrid 28029 Spain Fluorescence Imaging Group Departamento de Fisica Aplicada - Facultad de Ciencias Universidad Autonoma de Madrid C/ Francisco Tomas y Valiente 7 Madrid 28049 Spain Grupo de Nano-Fotonica e Imagens Instituto de Fisica Universidade Federal de Alagoas Maceio-AL 57072-900 Brazil Departamento de Quimica Fisica en Ciencias Farmaceuticas Facultad de Farmacia Plaza de Ramon y Cajal s/n Universidad Complutense de Madrid Madrid 28040 Spain

Ag2S nano dots have already bee n dem onstrated as promisi ng n ear-i nfrared (NIR-II, 1.0-1.45 pm) emitting nan oprobes with low toxicity, high penetration and high resolution for in vivo imaging of, for example, tumors and vasculature. In this work, we have systematically investigated the pote ntial applicati on of function alized Ag2S nano dots for accurate imaging of damaged myocardium tissues after a myocardial in farction in duced by either partial or global ischemia. Ag2S nano dots surface-function alized with the an giote nsin II peptide (ATI I) have show n over 10-fold enhanced binding efficiency to damaged tissues than non-specifically (PEG) functionalized Ag2S nanodots due to their interaction with the upregulated angiotensin II receptor type I (AT1R). It is demonstrated how the NIR-II images generated by ATII-functionalized Ag2S nanodots contain valuable information about the location and extension of damaged tissue in the myocardium allowing for a proper identification of the occluded artery as well as an in direct evaluati on of the damage level. The pote ntial applicati on of Ag2S nano dots in the n ear future for in vivo imaging of myocardial infarction was also corroborated by performing proof of concept whole body imaging experiments.

关键词： infrared imaging myocardial infarct Ag2S nanodots biological windows Langendorff heart

Prompt Electrodeposition of Ni nanodots on Ni Foam to Construct a High-Performance Water-Splitting Electrode:Efficient, Scalable,and Recyclable

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Nano-Micro Letters 2019年第3期11卷 79-91页

作者： Hongtao Yu Ting Quan Shilin Mei Zdravko Kochovski Wei Huang Hong Meng Yan Lu Soft Matter and Functional Materials Helmholtz-Zentrum Berlin für Materialien und EnergieHahn.Meitner Platz114109BerlinGermany Key Lab for Flexible Electronics&Institute of Advanced Materials Jiangsu National Synergistic InnovationCenter for Advanced Materials(SICAM)Nanjing Tech University30South Puzhu RoadNanjingPeople’s Republic of China Institute of Chemistry University of Potsdam14467PotsdamGermany

In past decades,Ni-based catalytic materials and electrodes have been intensively explored as low-cost hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalysts for water *** increasing demands for Ni worldwide,simplifying the fabrication process,increasing Ni recycling,and reducing waste are tangible sustainability ***,binder-free,heteroatom-free,and recyclable Ni-based bifunctional catalytic electrodes were fabricated via a one-step quick electrodeposition ***,active Ni nanodot(NiND)clusters are electrodeposited on Ni foam(NF)in Ni(NO3)2 acetonitrile *** drying in air,NiO/NiND composites are obtained,leading to a binder-free and heteroatom-free NiO/NiNDs@NF catalytic *** electrode shows high efficiency and long-term stability for catalyzing hydrogen and oxygen evolution reactions at low overpotentials(10ηHER= 119 mV and 50ηOER=360 mV)and can promote water catalysis at 1.70 V@ 10mA *** importantly,the recovery of raw materials(NF and Ni(NO3)2)is quite easy because of the solubility of NiO/NiNDs composites in acid solution for recycling the ***,a large-sized(S^70 cm2)NiO/NiNDs@NF catalytic electrode with high durability has also been *** method provides a simple and fast technology to construct high-performance,low-cost,and environmentally friendly Ni-based bifunctional electrocatalytic electrodes for water splitting.

关键词： Electrodeposition Ni nanodots Bifunctional catalysts Water splitting Large-size

Anodic-Aluminium-Oxide Template-Assisted Growth of ZnO nanodots on Si （100） at Low Temperature

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Chinese Physics Letters 2004年第7期21卷 1327-1329页

作者： XUTian-Ning WUHui-Zhen LAOYan-Feng QIUDong-Jiang CHENNai-Bo DAINing DepartmentofPhysics ZhejiangUniversityHangzhou310028 StateKeyLaboratoryofFunctionalMaterialsforInformatics ShanghaiInstituteofMicrosystemandInformationTechnologyChineseAcademyofSciencesShanghai200050 StateKeyLaboratoryforInfraredPhysics ShanghaiInstituteofTechnicalPhysicsChineseAcademyofSciencesShanghai200083

ZnO nanodots have been grown on Si (100) assisted by anodic aluminium oxide (AAO) template at low temperature (350 degrees C). Regular arrangement to a certain extent in local for ZnO nanodots is observed, and the average diameter of nanodots is about 9.7nm. Photoluminescence studies at room temperature for photon energy between 2.0 and 3.6eV reveal a strong single exciton peak at 3.274eV (378.8nm) with the green emission fully quenched. Narrow full width at half maximum (FWHM) of the UV emission band (0.14eV) suggests the as-grown ZnO nanodots have a narrow size distribution.

关键词： nanodots

Size-controlled MoS2 nanodots supported on reduced graphene oxide for hydrogen evolution reaction and sodium-ion batteries

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Nano Research 2017年第7期10卷 2210-2222页

作者： Weiyi Sun Pan Li Xue Liu Jiajia Shi Hongming Sun Zhanliang Tao Fujun Li Jun Chen Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Collaborative Innovation Center of Chemical Scienceand Engineering College of Chemistry Nankai University Tianjin 300071 China

Transition metal dichalcogenide nanodots （NDs） have received considerable interest. We report a facile bottom-up synthetic route for MoS2 NDs by using molybdenum pentachloride and L-cysteine as precursors in oleylamine. The synthesis of NDs with a narrow size distribution ranging from 2.2 to 5.3 nm, was tailored by controlling the reaction time. Because of its coating characteristics, oleyalmine leads to uniformity and monodispersity of the NDs. Moreover, the NDs synthesized have large specific surface areas providing active sites. Graphene possesses outstanding conductivity. Combining the advantages of the two materials, the 0D/2D material exhibits superior electrochemical performance because of the 2D permeable channels for ion adsorption, energy storage, and conversion. The as-prepared MoS2/rGO （-2.2 nm） showed a stable capacity of 220 mAh.g-1 after 10,000 cycles at the current density of 20 A.g-1. Furthermore, a reversible capacity -140 mAh·g-1 was obtained at a much higher current density of 40 A.g-L Additionally, this composite exhibited superior catalytic performance evidenced by a small overpotential （222 mV） to afford 10 ***-2, and a small Tafel slope （59.8 mV-decade-1） with good acid-stability. The facile approach may pave the way for the preparation of NDs with these nanostructures for numerous applications.

关键词： MoS2 nanodots size-controlled monodisperse electrochemical properties

A Glucose-Responsive Enzymatic Electrode on Carbon nanodots for Glucose Biosensor and Glucose/Air Biofuel Cell

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American Journal of Analytical Chemistry 2019年第9期10卷 394-403页

作者： Yue Gao Guozhi Wu Feng Gao Laboratory of Functionalized Molecular Solids Ministry of Education Anhui Key Laboratory of Chemo/Biosensing Laboratory of Biosensing and Bioimaging (LOBAB) College of Chemistry and Materials Science Anhui Normal University Wuhu China Taishan University Tai’an China College of Chemistry and Materials Engineering Chizhou University Chizhou China

In this study, an enzymatic electrode for glucose biosensing and bioanode of glucose/air biofuel cell has been fabricated by immobilizing poly (methylene green) (polyMG) for electrocatalytic NADH oxidation and NAD+-dependent glucose dehydrogenase (GDH) for oxidizing glucose on carbon nanodots (CNDs). The polyMG-CNDscomposites obtained by electro-polymerization of dye MG molecules adsorbed on CNDs display excellent electrocatalytic activity toward NADH electro-oxidation at a low overpotential of ca. -0.10 V (vs. Ag/AgCl) and the integrated enzymatic electrode shows fast response to glucose electrooxidation. Using the fabricated GDH-based enzymatic electrode, a glucose biosensor was constructed and exhibits a wide linear dynamic range from 0 to 8 mM, a low detection limit of 0.02 μM (S/N = 3), and fast response time (ca. 4 s) under the optimized conditions. The developed glucose biosensor was used to detect glucose content in human blood with satisfactory results. The fabricated GDH-based enzymatic electrode was also employed as bioanode to assembly a glucose/air biofuel cell with the laccase-CNDs/GC as the biocathode. The maximum power density delivered by the assembled glucose/air biofuel cell reaches 3.1 μW·cm-2 at a cell voltage of 0.22 V in real sample fruit juice. The present study demonstrates that potential applications of GDH-based CNDs electrode in analytical and biomedical measurements.

关键词： Carbon nanodots Glucose Dehydrogenase Laccase Methylene Green Biosensor Biofuel Cell

Phthalocyanine-Based nanodots for in Vivo Photoacoustic Imaging and Photothermal Cancer Therapy

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Phthalocyanine-Based Nanodots for in Vivo Photoacoustic Imag...

Metalloporphyrin-based nanodots for multimodal imaging guided photodynamic therapy

第十一届全国化学生物学学术会议

作者： Fengshou Wu MOE Key Laboratory for Green Chemical Process School of Chemical Engineering and PharmacyWuhan Institute of Technology

The development of near-infrared（NIR）-absorbing nanoagents that integrate diagnosis and therapy for effective personalized precision medicine has attracted considerable attention in the past few ***,the organic nanomaterials with good biosafety are emerging promising phototheranostic agents but their facile syntheses remain *** by the preparation of carbon nanodots,here we developed a facile and high output strategy to fabricate photothermal nanodots based on the self-assembly and carbonization of photoactive phthalocyanine and citric *** self-assembling nature of phthalocyanines induces the formation of J-aggregates as substructures of the nanodots,and thus enables the fabrication of nanodots with totally inhibited fluorescence emission and singlet oxygen production,leading to a high photothermal conversion efficiency（η=45.7%）.To increase the tumor-targeting properties,the biotin was conjugated on the surface of ZnPc-NDs to afford biotin-conjugated zinc phthalocyanine nanodots（ZnPc-BT）.The ZnPc-BT reveal favorable biocompatibility,strong photoacoustic signal,high tumor accumulation,and effective tumor ***,this paper provided the new insight for further developing nanomedicines with imaging and therapeutic capacities,which can treat the cancers precisely and effectively.

关键词： Zinc phthalocyanine nanodots Photoacoustic imaging Photothermal therapy

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Metalloporphyrin-based nanodots for multimodal imaging guide...

A non-lithographic plasma nanoassembly technology for polymeric nanodot and silicon nanopillar fabrication

中国化学会第五届卟啉与酞菁学术研讨会

作者： Fengshou Wu School of Chemical Engineering ＆ Pharmacy Wuhan Institute of Technology

Multifunctional nanoparticles with combined diagnostic and therapeutic functions show great promise towards personalized ***,attaining consistently high performance of these functions in vivo in one single nanoconstruct remains extremely *** this work,we prepared and characterized new class of red/near-infrared emissive porphyrin-based nanodots by simple one-pot hydrothermal method（Fig.1）.Various spectroscopies demonstrated unambiguously that highly thermostable metalloporphyrins were encapsulated into the graphite lattice with peripheral amine groups as sources of graphite-N under hydrothermal *** resulted nanocomposites MnPCNDs synergistically brings out near-infrared fluorescence imaging（NIRFI）,magnetic resonance imaging（MRI）,porphyrin-mediated photodynamic therapy（PDT） in one single *** creative work could provide a simple and feasible modality to develop the novel nanomedicine for practical NIRFI and MRI-guided PDT applications.

关键词： photodynamic therapy nanodots magnetic resonance imaging porphyrin

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Frontiers of Chemical Science and Engineering 2019年第3期13卷 475-484页

作者： Athanasios Smyrnakis Angelos Zeniou Kamil Awsiuk Vassilios Constantoudis Evangelos Gogolides Institute of Nanoscience & Nanotechnology NCSR “Demokritos”Ag. Paraskevi15341 AtticaGreece Department of Physics University of Patras26504 PatrasGreece M. Smoluchowski Institute of Physics Jagiellonian University30-348 KrakowPoland

In this work, we present plasma etching alone as a directed assembly method to both create the nanodot pattern on an etched polymeric (PMMA) film and transfer it to a silicon substrate for the fabrication of silicon nanopillars or cone-like nanostructuring. By using a shield to control sputtering from inside the plasma reactor, the size and shape of the resulting nanodots can be better controlled by varying plasma parameters as the bias power. The effect of the shield on inhibitor deposition on the etched surfaces was investigated by time-of-flight secondary ion mass spectroscopy (ToF-SIMS) measurements. The fabrication of quasi-ordered PMMA nanodots of a diameter of 25 nm and period of 54 nm is demonstrated. Pattern transfer to the silicon substrate using the same plasma reactor was performed in two ways:(a) a mixed fluorine-fluorocarbon-oxygen nanoscale etch plasma process was employed to fabricate silicon nanopillars with a diameter of 25 nm and an aspect ratio of 5.6, which show the same periodicity as the nanodot pattern, and (b) high etch rate cryogenic plasma process was used for pattern transfer. The result is the nanostructuring of Si by high aspect ratio nanotip or nanocone-like features that show excellent antireflective properties.

关键词： plasma nanoassembly etching nanodots nanopillars nanofabrication