检索结果-南通市图书馆

Rare Metals 2016年第11期35卷 863-869页

作者： Vali Dalouji S.Mohammad Elahi Sirvan Naderi Department of Physics Malayer University Plasma Physics Research Center Science and Research BranchIslamic Azad University Department of Physics Kermanshah BranchIslamic Azad University

In this work, the optical absorption spectra of carbon-nickel films annealed at different temperatures（300-1000 ℃） with a special emphasis on the surface plasmon resonance（SPR） were investigated. The films were grown on quartz substrates by radio-frequency（RF）magnetron co-sputtering at room temperature with a deposition time of 600 s. The optical absorption peaks due to the SPR of Ni particle are observed in the wavelength range of 300-330 nm. With annealing temperature increasing up to 500 ℃ due to the increase in Ni particle size, the intensity of the SPR peaks increases, but weakens with annealing temperature increasing over 500 ℃. The Ni nanoparticle size, the dielectric function of carbon matrix（ε_m） and the plasma frequency of the free electrons（ω_p） at500 ℃have the maximum values of 21.63 nm, 0.471 and5.26 9 10^（15）s^（-1）, respectively. The absorption peak shows a redshift trend up to 500 ℃and then turn to blueshift with annealing temperature increasing over 500 ℃ These observations are in a good agreement with the electrical measurements in temperature range of 15-520 K and the Maxwell-Garnett（M-G） effective medium theory（EMT）.

关键词： surface plasmon resonance Carbon-nickelfilms Ni content Annealing temperatures Electricalresistivity

surface plasmon resonance metal-coupled biomass carbon modified TiO_(2) nanorods for photoelectrochemical water splitting

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第1期35卷 403-411页

作者： Yingzhen Zhang Yonggang Lei Tianxue Zhu Zengxing Li Shen Xu Jianying Huang Xiao Li Weilong Cai Yuekun Lai Xiaojun Bao National Engineering Research Center of Chemical Fertilizer Catalyst(NERC-CFC) College of Chemical EngineeringFuzhou UniversityFuzhou 350116China Fujian Science&Technology Innovation Laboratory for Chemical Engineering of China Quanzhou 362114China

Exploring efficient and stable photoanode materials is a necessary link to realize the practical application of solar-driven photoelectrochemical(PEC)water ***,we prepared rutile TiO_(2) nanorods,with a width of 50 nm,which was growth in situ on carbon cloth(TiO_(2)@CC)by hydrothermal *** then,Ag nanoparticles(NPs)and biomass N,S-C NPs were chosen for the additional modification of the fabricated TiO_(2) nanorods to produce broccoli-like Ag-N,S-C/TiO_(2)@CC *** to the result of ultraviolet-visible diffuse reflectance spectroscopy(UV-vis)and PEC water splitting performance tests,Ag-N,S-C/TiO_(2)@CC broadens the absorption region of TiO_(2)@CC from the ultraviolet region to the visible regio *** AM 1.5 G solar light irradiation,the photocurrent density of Ag-N,S-C/TiO_(2)@CC is 89.8μA·cm^(-2),which is 11.8 times higher than TiO_(2)@*** visible light irradiation,the photocurrent density of Ag-N,S-C/TiO_(2)@CC reaches to 12.6μA·cm^(-2),which is 21.0 times higher than TiO_(2)@***,Ag-N,S-C/TiO_(2)@CC shows a photocurrent responses in full pH *** can be found that Ag NPs and N,S-C NPs play key roles in broaden the absorption range of TiO_(2) nanorods to the visible light region and,promote the occurrence of PEC water oxidation reaction due to the surface plasmon resonance effect of Ag NPs and the synergistic effect of N,S-C *** mechanism demonstrated that Ag-N,S-C/TiO_(2)@CC can separate the photogenerated electron-hole pairs effectively and transfer the photogenerated electrons to the photocathode(Pt plate)in *** research provides a new strategy for exploration surface plasma metal coupled biomass carbon materials in the field of PEC water splitting.

关键词： Photoelectrochemical Water oxidation Ag-N,S-C/TiO_(2) surface plasmon resonance Biomass carbon

surface plasmon resonance and field confinement in graphene nanoribbons in a nanocavity

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2021年第4期16卷 221-228页

作者： Sa Yang Ren-Long Zhou Yang-Jun Huang School of Physics and Information Engineering Guangdong University of EducationGuangzhou 510303China

In this work,we demonstrate surface plasmon resonance properties and field confinement under a strong interaction between a waveguide and graphene nanoribbons(GNRs),obtained by coupling with a *** optical transmission of a waveguide–cavity–graphene structure is investigated by finite-difference time-domain simulations and coupled-mode *** resonant frequency and intensity of the GNR resonant modes can be precisely controlled by tuning the Fermi energy and carrier mobility of the graphene,***,the refractive index of the cavity core,the susceptibilityχ(3)and the intensity of incident light have little effect on the GNR resonant modes,but have good tunability to the cavity resonant *** cavity length also has good tunability to the resonant mode of cavity.A strong interaction between the GNR resonant modes and the cavity resonant mode appears at a cavity length of L1=350 *** also demonstrate the slow-light effect of this waveguide–cavity–graphene structure and an optical bistability effect in the plasmonic cavity mode by changing the intensity of the incident *** waveguide–cavity–graphene structure can potentially be utilised to enhance optical confinement in graphene nano-integrated circuits for optical processing applications.

关键词： graphene nanoribbon surface plasmon resonance confinement

surface plasmon resonance of layer-by-layer gold nanoparticles induced photoelectric current in environmentally-friendly plasmon-sensitized solar cell

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2012年第1期1卷 100-104页

作者： Yen-Hsun Su Yuan-Feng Ke Shi-Liang Cai Qian-Yu Yao Department of Materials Science and Engineering National Dong Hwa UniversityHualien Department of Physics National Dong Hwa UniversityHualien

Layer-by-layer gold nanoparticles are used to generate photocurrent in an environmentally-friendly plasmon-sensitized solar cell towing to surface plasmon *** efficiency of the photoelectric conversion of gold nanoparticle layers is increased as the intensity of surface plasmon resonance *** also explain the experimental results by modeling the phenomenon of charge separation and photocurrent formation,and the relationship between surface plasmon resonance and photocurrent formation,which has potential application in plasmon-sensitized solar cells and plasmonic solar cells in the future.

关键词： charge separation layer-by-layer gold nanoparticles plasmon-sensitized solar cells plasmonic solar cells surface plasmon resonance

surface plasmon resonance-induced visible-light photocatalytic performance of silver/silver molybdate composites

维普期刊数据库评论

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 Catalysis 2017年第2期38卷 260-269页

作者：杨祥龙王尹徐骁瞿阳丁星陈浩华中农业大学理学院湖北武汉430070

Novel silver/silver molybdate（Ag/Ag2MoO4） composites with surface plasmon resonance（SPR）-enhanced photocatalytic performance were successfully fabricated via a facile one-pot hydrothermal route with the presence of sodium dodecyl sulfate（SDS） in this *** as prepared silver/silver molybdate（Ag/Ag2MoO4） composites were systematically characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and ultraviolet-visible diffuse reflectance absorption spectroscopy（DRS） in order to investigate their crystal structure,morphology and optical property as *** photocatalytic activities of the composites were subsequently evaluated by their ability to degrade rhodamine B（RhB） under visible-light *** of controlled experiments were then carefully operated to gain a deep insight into the assembling of Ag/*** was found that preparation conditions such as pH,reaction time,and the amount of surfactant played important roles in the formation of composites with octahedral *** the composite obtained at 160 ℃ using 0.5 g of sodium dodecyl sulfate exhibited the highest photocatalytic performance under visible-light *** experiments were also conducted to clarify the function of different active species generated on the surface of Ag/Ag2MoO4during the photocatalytic process,in which both holes and ·OH radicals were found to play crucial role in photocatalytic removal of RhB under visible light irradiation.A possible photocatalytic mechanism of Ag/Ag2MoO4 was finally proposed on the basis of all the results to explain the higher photocatalytic activity of the octahedral Ag/Ag2MoO4 *** was inferred that the photoinduced ＂hot＂ electrons can quickly transfer from the Ag NPs to the conduction band of Ag2MoO4 and react with oxygen and H2O to generate a large quality of active radicals such as ·OH and ·O2^- because of the SPR ***,this SPR effects of Ag nanoparticles deposited on the surface

关键词： Silver Silver molybdate Sodium dodecyl sulfate Photocatalytic activity surface plasmon resonance Rhodamine B

Using a surface plasmon resonance Biosensor for Rapid Detection of Salmonella Typhimurium in Chicken Carcass

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2008年第3期5卷 239-246页

作者： Yu-bin Lan Shi-zhou Wang Yong-guang Yin W. Clint Hoffmann Xian-zhe Zheng USDA-ARS College Station TX77845 USA Department of Environmental and Occupational Health Texas A＆M University College Station TX 77845 USA College of Biological and Agricultural Engineering Jilin University Changchun 130022 P. R. China College of Engineering Northeast Agricultural University Harbin 150030 P. R. China

Chicken is one of the most popular meat products in the world. Salmonella Typhimurium is a common foodbome pathogens associated with the processing of poultry. An optical surface plasmon resonance （SPR） biosensor was sensitive to the presence of Salmonella Typhimurium in chicken carcass. The Spreeta biosensor kits were used to detect Salmonella Typhimurium on chicken carcass successfully. A taste sensor like electronic tongue or biosensors was used to basically ＂taste＂ the object and differentiated one object from the other with different taste sensor signatures. The surface plasmon resonance biosensor has potential for use in rapid, real-time detection and identification of bacteria, and to study the interaction of organisms with dif- ferent antisera or other molecular species. The selectivity of the SPR biosensor was assayed using a series of antibody con- centrations and dilution series of the organism. The SPR biosensor showed promising to detect the existence of Salmonella Typhimurium at 1 x 106 CFU/ml. Initial results show that the SPR biosensor has the potential for its application in pathogenic bacteria monitoring. However, more tests need to be done to confirm the detection limitation.

关键词： biosensor Salmonella Typhimurium food safety chicken carcass detection limitation surface plasmon resonance

Numerical simulation of a truncated cladding negative curvature fiber sensor based on the surface plasmon resonance effect

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第3期32卷 262-269页

作者：张志超苑金辉邱石周桂耀周娴颜玢玢吴强王葵如桑新柱 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China Research Center for Convergence Networks and Ubiquitous Services University of Science&Technology BeijingBeijing 100083China Guangzhou Key Laboratory for Special Fiber Photonic Devices South China Normal UniversityGuangzhou 510006China Department of Physics and Electrical Engineering Northumbria UniversityNewcastle upon TyneNE18STUnited Kingdom Key Laboratory of Nondestructive Test(Ministry of Education) Nanchang Hong Kong UniversityNanchang 330063China

A refractive index(RI)sensor based on the surface plasmon resonance effect is proposed using a truncated cladding negative curvature fiber(TC-NCF).The influences of the TC-NCF structure parameters on the sensing performances are investigated and compared with the traditional *** simulation results show that the proposed TC-NCF RI sensor has an ultra-wide detection range from 1.16 to *** maximum wavelength sensitivity reaches 12400 nm/RIU,and the corresponding R^(2)of the polynomial fitting equation is *** maximum and minimum resolutions are 2.56×10^(-5)and 8.06×10^(-6),*** addition,the maximum amplitude sensitivity can reach-379.1 RIU^(-1)when the RI is chosen as *** proposed TC-NCF RI sensor could be useful in biochemical medicine,environmental monitoring,and food safety.

关键词： truncated cladding negative curvature fiber refractive index sensor surface plasmon resonance

Broadband tunability of surface plasmon resonance in graphene-coating silica nanoparticles

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第5期25卷 393-399页

作者：史哲杨阳甘霖李志远 Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education) Department of PhysicsBeihang University

Graphene decorated nanomaterials and nanostructures can potentially be used in military and medical science applications. In this article, we study the optical properties of a graphene wrapping silica core–shell spherical nanoparticle under illumination of external light by using the Mie theory. We find that the nanoparticle can exhibit surface plasmon resonance（SPR） that can be broadly tuned from mid infrared to near infrared via simply changing the geometric parameters. A simplified equivalent dielectric permittivity model is developed to better understand the physics of SPR, and the calculation results agree well qualitatively with the rigorous Mie theory. Both calculations suggest that a small radius of graphene wrapping nanoparticle with high Fermi level could move the SPR wavelength of graphene into the near infrared regime.

关键词： graphene core–shell nanoparticle surface plasmon resonance

Low-cost,high performance surface plasmon resonance-compatible films characterized by the surface plasmon resonance technique

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2013年第7期22卷 444-449页

作者：李松权叶红安柳春郁窦寅丰黄妍 School of Electronic Engineering Heilongjiang University

A new analytical method based on the surface plasmon resonance （SPR） technique is presented, with which SPR curves for both wavelength and angular modulations can be obtained simultaneously via only a single scan of the incident angle. Using this method, the SPR responses of TiO2-coated Cu films are characterized in the wavelength range from 600 nm to 900 nm. For the first time, we determine the effective optical constants and the thicknesses of TiO2-coated Cu films using the SPR curves of wavelength modulation. The sensitivities of prism-based SPR refractive index sensors using TiO2-coated Cu films are investigated theoretically for both wavelength and angular modulations, the results show that in the case of sensitivity with wavelength modulation, TiO2-coated Cu films are not as good as the Au film, however, they are more suitable than the Au film for SPR refractive index sensors with angular modulation because a higher sensitivity can be achieved.

关键词： surface plasmon resonance optical constants thin film

Investigating the effect of volatility on the hygroscopicities of acetate nanoparticle aerosols by surface plasmon resonance microscopy

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第4期138卷 167-178页

作者： Bo Yang Zhibo Xie Jianguo Liu Huaqiao Gui Jiaoshi Zhang Xiuli Wei Zetao Fan Douguo Zhang Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China CAS Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Advanced Laser Technology Laboratory of Anhui Province Department of Optics and Optical EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Under high relative humidity(RH)conditions,the release of volatile components(such as acetate)has a significant impact on the aerosol *** this work,one surface plasmon resonance microscopy(SPRM)measurement system was introduced to determine the hygroscopic growth factors(GFs)of three acetate aerosols separately or mixed with glucose at different *** Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) aerosols,the hygroscopic growth trend of each time was lower than that of the previous time in three cyclic humidification from 70% RH to 90% RH,which may be due to the volatility of acetic acid leading to the formation of insoluble hydroxide(Ca(OH)_(2) or Mg(OH)_(2))under high RH *** the third calculated GF(using the Zdanovskii-Stokes-Robinson method)for Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) in bicomponent aerosols with 1:1 mass ratio were 3.20% or 5.33% lower than that of the first calculated GF at 90% *** calculated results also showed that the hygroscopicity change of bicomponent aerosol was negatively correlated with glucose content,especially when the mass ratio of Mg(CH_(3)COO)_(2) to glucose was 1:2,the GF at 90% RH only decreased by4.67% after three cyclic *** coupled plasma atomic emission spectrum(ICP-AES)based measurements also indicated that the changes of Mg^(2+)concentration in bicomponent was lower than that of the *** results of this study reveal thatduring the efflorescence transitions of atmospheric nanoparticles,the organic acids diffusion rate may be inhibited by the coating effect of neutral organic components,and the particles aging cycle will be prolonged.

关键词： Hygroscopic growth Volatility Acetate aerosols Nanoparticle aerosol surface plasmon resonance