检索结果-南通市图书馆

Engineering DNA quadruplexes in DNA nanostructures for biosensor construction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第4期15卷 3504-3513页

作者： Jingxin Liu Li Yan Shiliang He junqing hu College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118China Shenzhen Bey Laboratory Shenzhen 518132China

DNA quadruplexes are nucleic acid conformations comprised of four *** are prevalent in human genomes and increasing efforts are being directed toward their *** advantage of the programmability of Watson-Crick base-pairing and conjugation methodology of DNA with other molecules,DNA nanostructures of increasing complexity and diversified geometries have been artificially constructed since *** this review,we investigate the interweaving of natural DNA quadruplexes and artificial DNA nanostructures in the development of the ever-prosperous field of biosensing,highlighting their specific roles in the construction of biosensor,including recognition probe,signal probe,signal amplifier and support *** implementation in various sensing scenes was *** finally,general conclusion and future perspective are discussed for further developments.

关键词： G-quadruplex i-motif DNA nanotechnology biosensor

Template-free approach for hydrothermal fabrication of ZnO microspheres

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2009年第3期7卷 225-228页

作者： Hao Jiang junqing hu Feng Gu Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science & Technology Shanghai 200237 China College of Materials Science and Engineering State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 200051 China

Wurtzite ZnO microspheres, 5.5-11 μm in diameter and with smooth surfaces, were prepared in absolute ethanol via a simple template-free method in the presence of ethylenediamine. The products were characterized using X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. This simple method to fabricate ZnO microspheres shows high yield （〉90%） and good reproducibiliry. The formation process of ZnO microspheres was discussed. The as-obtained ZnO microspheres are expected to provide some immediate advantages for optical, microelectronic, and biological applications.

关键词： Zinc oxide Hydrothermal crystal growth Microspheres

A Hybrid Electrode of Co_3O_4@PPy Core/Shell Nanosheet Arrays for High-Performance Supercapacitors

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2016年第2期8卷 143-150页

作者： Xiaojun Yang Kaibing Xu Rujia Zou junqing hu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University

Herein, combining solverthermal route and electrodeposition, we grew unique hybrid nanosheet arrays consisting of Co_3O_4 nanosheet as a core, PPy as a shell. Benefiting from the PPy as conducting polymer improving an electron transport rate as well as synergistic effects from such a core/shell structure, a hybrid electrode made of the Co_3O_4@PPy core/shell nanosheet arrays exhibits a large areal capacitance of 2.11 F cm-2at the current density of 2 m A cm^(-2), a *4-fold enhancement compared with the pristine Co_3O_4electrode; furthermore, this hybrid electrode also displays good rate capability(*65 % retention of the initial capacitance from 2 to 20 m A cm^(-2)) and superior cycling performance(*85.5 % capacitance retention after 5000 cycles). In addition, the equivalent series resistance value of the Co_3O_4@PPy hybrid electrode(0.238 X) is significantly lower than that of the pristine Co_3O_4electrode(0.319 X). These results imply that the Co_3O_4@PPy hybrid composites have a potential for fabricating next-generation energy storage and conversion devices.

关键词： Co3O4@PPy Core/shell nanosheet arrays Supercapacitors

An adjustable multi-color detector based on regulating TiO_(2)surface adsorption and multi-junction synergy

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第10期14卷 3423-3430页

作者： Tao Ji Shuqing He Fujin Ai Jianghong Wu Li Yan junqing hu Meiyong Liao College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118China Research Center for Functional Materials National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbaraki 305-0044Japan Shenzhen Bay Laboratory Shenzhen 518132China

A TiO_(2)-based multi-color photodetector with controlled photoelectric response to ultraviolet(UV)and visible light is developed by using band regulation technologies such as multi-junction synergy and surface *** photodetector is manufactured via a continuous process including magnetron sputtering,hydrothermal growth,hydrogen annealing,spin coating and thermal evaporation assembly to form a structure of N-doped TiO_(2)/hydrogenated-TiO_(2)/p-Si *** synergistic effects form electronic potential wells in the device to control the electrical transport and spectral response of photo-generated *** the air,the device exhibits a controllable photodetection ability that responds to visible light at positive voltages and UV light at negative *** in vacuum(<0.1 Pa),the photodetection ability of the device at negative voltages is greatly reduced due to the lack of barrier effect caused by surface *** the contrary,the photodetection ability at positive voltage(e.g.,4 V)has been greatly improved,and the quantum efficiency reaches 206.6%under the 480 nm wavelength *** device has a controllable ability to detect UV and visible light depending on the environments,which is very useful in the fields of environmental detection,chemical sensing and multi-color communication,etc.

关键词： multi-color detector surface adsorption band adjustment optoelectronic

An enzyme-free glucose sensing device based on TiO2 nanorod array photoelectric catalysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2023年第9期42卷 26-33页

作者： Anna Su Qiumei Lei Gaoqi Tian Yaolan Yang Shuqing He Li Yan Xin hu Tao Ji Shijie Li junqing hu College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen518118China National Engineering Research Center for Marine Aquaculture Institute of Innovation&ApplicationZhejiang Ocean UniversityZhoushanZhejiang316022China Shenzhen Bay Laboratory Shenzhen518132China

A simple one-step hydrothermal method is used to prepare an enzyme-free photoelectric combined glucose sensor based on TiO_(2)NRs/FTO with low cost,sample two-electrode,and excellent *** 380 nm light(0.5 mW cm^(−2))irradiation and a positive voltage,holes are accumulated on TiO_(2)NRs surface,catalyzing glucose and forming a photocurrent without the need for an enzyme,such as Glucose oxidase(GOx).The designed sensor exhibits high sensitivity(about 0.96μA mM^(−1)cm^(−2),without GOx)and excellent linear relationship in the glucose concentration range of 5–15 mML^(−1).The prepared glucose sensor performs better with a sensitivity of 1.48μA mM^(−1)cm^(−2)when a certain amount of GOx is mixed in the detected *** addition,the sensor has excellent anti-interference resistance to non-reducing chitosan and reducing ascorbic acid with short response time(less than 5 s);thus,it can be used in quick detection with a double electrode *** sensing device has the advantages of simple fabrication,easy storage,and reusability;therefore,it can be very promising in the portable and rapid monitoring of human blood glucose levels.

关键词： Glucose TiO_(2) Enzyme-free Photocatalysis Electrochemical biosensor

Hydrophilic bismuth sulfur nanoflower superstructures with an improved photothermal efficiency for ablation of cancer cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2016年第7期9卷 1934-1947页

作者： Zhiyin Xiao Chaoting Xu Xiaohong Jiang Wenlong Zhang Yuxuan Peng Rujia Zou Xiaojuan huang Qian Liu Zongyi Qin junqing hu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China 2 College of Biological Chemical Sciences and Engineering Jiaxing University Jiaxing 314001 China School of Medicine Science Jiaxing University Jiaxing 314001 China College of Science Donghua University Shanghai 201620 China

Nanomaterials with intense near-infrared （NIR） absorption exhibit effective photon-to-thermal energy transfer capabilities and can generate heat to ablate cancer cells, thus playing a pivotal role in photothermal cancer therapeutics. Herein, hydrophilic flower-like bismuth sulfur （Bi2S3） superstructures with uniform size and improved NIR absorption were controllably synthesized via a facile solvothermal procedure assisted by polyvinylpyrrolidone （PVP）, which could adjust the product morphology. Induced by an 808-nm laser, the as-prepared Bi2S3 nanoflowers exhibited much higher photothermal conversion efficiency （64.3%） than that of Bi2S3 nanobelts （36.5%） prepared in the absence of PVP. This can be attributed not only to the Bi2S3 nanoflower superstructures assembled by 3-dimensional crumpled-paper-like nanosheets serving as many laser-cavity mirrors with improved reflectivity and absorption of NIR light but also to the amorphous structures with a lower band gap. Thus, to achieve the same temperature increase, the concentration or laser power density could be greatly reduced when using Bi2S3 nanoflowers compared to when using Bi2S3 nanobelts, which makes them more favorable for use in therapy due to decreased toxicity. Furthermore, these Bi2S3 nanoflowers effectively achieved photothermal ablation of cancer ceils in vitro and in vivo. These results not only supported the Bi2S3 nanoflowers as a promising photothermal agent for cancer therapy but also paved an approach to exploit new agents with improved photothermal efficiency.

关键词： bismuth sulfur nanoflowers photothermal agent photothermal conversionefficiency cancer therapy

Surface disorder engineering in ZnCdS for cocatalyst free visible light driven hydrogen production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第2期15卷 996-1002页

作者： Enna Ha Shuhong Ruan Danyang Li Yuanmin Zhu Yanping Chen Jiangyuan Qiu Zhaohui Chen Tingting Xu Jingyun Su Luyang Wang junqing hu College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118China College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China

Metal chalcogenide solid solution,especially ZnCdS,has been intensively investigated in photocatalytic H_(2) generation due to their cost-effective synthetic procedure and adjustable band *** this work,we report on the defect engineering of ZnCdS with surface disorder layer by simple room temperature Li-ethylenediamine(Li-EDA)*** results confirm the formation of unusual Zn and S dual vacancies,where rich S vacancies(Vs)served as electron trapping sites,meanwhile Zn vacancies(Vzn)served as hole trapping *** refined structure significantly facilitates the photo charge carrier transfer and improves photocatalytic properties of *** disordered ZnCdS shows a highest photocatalytic H_(2) production rate of 33.6 mmol·g^(-1)·h^(-1) under visible light with superior photocatalytic stabilities,which is 7.3 times higher than pristine ZnCdS and 7 times of Pt(1 wt.%)loaded ZnCdS.

关键词： ZnCdS solid solution Li-EDA disorder engineering dual vacancies photocatalytic H_(2)reduction

Recent strategies for constructing efficient interfacial solar evaporation systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research Energy 2023年第2期2卷 26-44页

作者： Yida Wang junqing hu Li Yu Xuan Wu Yingying Zhang Haolan Xu Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118China Future Industries Institute UniSA STEMUniversity of South AustraliaMawson Lakes CampusSA 5095Australia

Interfacial solar evaporation(ISE)is a promising technology to relieve worldwide freshwater shortages owing to its high energy conversion efficiency and environmentally sustainable *** far,many innovative materials and evaporators have been proposed and applied in ISE to enable highly controllable and efficient solar-to-thermal energy *** rational design,solar evaporators can achieve excellent energy management for lowering energy loss,harvesting extra energy,and efficiently utilizing energy in the system to improve freshwater *** that,a strategy of reducing water vaporization enthalpy by introducing molecular engineering for water-state regulation has also been demonstrated as an effective approach to boost *** on these,this article discusses the energy nexus in two-dimensional(2D)and three-dimensional(3D)evaporators separately and reviews the strategies for design and fabrication of highly efficient ISE *** summarized work offers significant perspectives for guiding the future design of ISE systems with efficient energy management,which pave pathways for practical applications.

关键词： interfacial solar evaporation photothermal materials energy management molecular engineering

Controllable Hydrothermal Synthesis of Cd2Ge2O6Nanostructures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Materials Physics and Chemistry 2014年第7期4卷 134-140页

作者： Qian Liu Guanjie He Kaibing Xu junqing hu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai China

Various Cd2Ge2O6 nanostructures, including nanorods, nanoparticles, nanowires and erythrocyte/ flower/disc-like superstructures have been successfully prepared by hydrothermal methods, which are simply tuned by changing the reaction temperature, surfactants, and the molar ratio of Cd and Ge precursors in aqueous solution. These morphologies can be simply controlled by only selecting the reactants and controlling experimental conditions with excellent reproducibility. These studies about the Cd2Ge2O6 nanostructures reveal that temperature is a crucial parameter to tune the morphologies from nanoparticles to nanorods. By adding various surfactants, different nanostructures such as flower/disc-like nanosticks could be obtained. Replacing Cd(CH3COO)22H2O with CdO as the precusor results in the formation of ultralong nanowires with CTAB as surfactant. Molar ratio of GeO2 to CdO was demonstrated as an important factor to influence the surface smoothness of nanowires. It is believed that the simple hydrothermal route may be the useful route to synthesize variable germanate nanostructures for various applications.

关键词： Hydrothermal Cd2Ge2O6 Nanorods Nanowires Superstructures