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| 1 | Coupling-induced excitation of a forbidden surface plasmon mode of a gold nanorod显示文摘Using the finite-difference time-domain(FDTD) method,we simulate the coupling between a gold nanorod and gold nanoparticles with different plasmonic resonant frequencies/volumes as well as that between the nanorod and a dielectric nanosphere.The influences of coupling with different nanoparticles on the excitation of a forbidden longitudinal surface plasmon mode of the nanorod under normal incidence are investigated.It is found that the cause of this excitation is the broken symmetry of the local electric field experienced by the nanorod resulting from the charge pileup on the other nanoparticle.This result is valuable for understanding the near-field optical characterization of plasmonic metal nanoparticles. | YAO HaoMin LI Zhi GONG QiHuang | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，8： | 8 |
| 2 | Homologous and heterologous interactions between catalytic and regulatory subunits of Escherichia coli acetohydroxyacid synthaseⅠand Ⅲ显示文摘Homologous and heterologous interactions between acetohydroxyacid synthase (AHAS) I and Ⅲ from E. coli have been studied by surface plasmon resonance (SPR). The catalytic and regulatory subunits association for AHAS I (KD = 1.13 × 10-7 M) was stronger than that for AHAS Ⅲ (KD = 5.29 × 10-7 M). A strong heterologous association between regulatory and catalytic subunits and heterologous activation of catalytic subunits were observed. SPR results combined with enzyme kinetics indicate that the reconstituted heterologous enzymes had similar kinetic properties as homologous enzymes, implying that the regulatory subunit of AHAS I could be replaced by the regulatory subunit of AHAS Ⅲ and vice versa. This work may be useful to further understandings of the mechanism of regulation of AHAS. | NIU CongWei, FENG Wei, ZHOU YanFei, WEN Xin & XI Zhen State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical Biology, Nankai University, Tianjin 300071, China | 2009 | Science China Chemistry2009，52，9： | 3 |
| 3 | The effect of the Kerr nonlinearity on the transmission through the nanoslit gold film显示文摘This paper has made a theoretical study of enhanced transmission through a gold grating with arrays of subwavelength slits filled with nonlinear Kerr medium. The results of the research are based on rigorous finite-difference time domain calculations. The resonance transmission peaks in the investigated wavelength range are produced as a result of the surface plasmon resonance collaborated with the localized waveguide resonance. The paper also gives a detailed analysis of the influence exerted by various factors: thickness, third-order susceptibility and line refractive index of the nonlinear medium filled in the gold slits arrays and the incident intensity to the transmission. It is found that the small changes of parameters such as medium thickness, third-order susceptibility and line refractive index of the nonlinear medium filled in the gold slits arrays as well as the incident intensity can bring great changes of lateral shift and magnitude variation of the transmission resonance peaks. The report proposes that these phenomena can be applied to designing precise optical switches. | XIE SuXia1,2, LI HongJian1,2, XU HaiQing1, ZHOU Xin1, 2, FU ShaoLi1 & WU JinJun1 1 College of Physics Science and Technology, Central South University, Changsha 410083, China 2 College of Materials Science and Engineering, Central South University, Changsha 410083, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，3： | 3 |
| 4 | Highly efficient and stable solar-powered desalination by tungsten carbide nanoarray film with sandwich wettability显示文摘Solar-powered desalination is a promising way to resolve the worldwide water crisis for its low con- sumption and simple facility. Considering the fragility and aggregations of traditional materials, which may decrease efficiency, we herein introduce a robust tungsten carbide (WC) nanoarray film as a stable and efficient photothermal material, whose absorption is over 97.5% throughout almost the whole solar spectrum range (220–2200 nm) due to nanoarray structure and thus enhanced localized surface plasmon resonance. Besides, for the first time, we modified the film with sandwich wettability. It accelerates evap- oration by reducing water’s reflection of light, enlarging hydrophobic-hydrophilic boundaries, and depressing heat dissipation. Combining high absorption with unique wettability, the WC nanoarray film offers high solar-to-vapor efficiency of 90.8% and produces drinking water at the rate of (1.06 ± 0.10) kg m^(-2)h^(-1)from man-made seawater and (0.98 ± 0.18) kg m^(-2)h^(-1)from heavy metal sewage under one sun (AM 1.5) while 98% performance remains after 1 h×100 times’ reutilization. | Nana Han Kai Liu Xinping Zhang Meng Wang Pan Du Zhaohui Huang Daojin Zhou Qian Zhang Tengfei Gao Yin Jia Liang Luo Jianjun Wang Xiaoming Sun | 2019 | Science Bulletin2019，64，6： | 2 |
| 5 | Controllable synthesis of metal particles by a direct current electrochemical approach显示文摘Shapes of copper and silver particles were successfully controlled by using a very simple,effective direct-current electrochemical approach without introducing any additives or templates. A diverse range of shapes and also different inner structures were thus accessible. The products prepared at relatively high potentials have flowerlike morphologies and exhibit flakes as building blocks. The uniformly thick flakes intersect mutually,have smooth surfaces and outwardly wavy edges. The particle diameter and the flake density can be easily controlled by changing potential and/or deposition time. With a decrease of potential,the particles' shapes changed from flower to bud,to sphere and to octahedron. Surface plasmon resonance (SPR) properties of the supported metal particles were investigated by UV-Vis diffuse reflectance spectra (UV-Vis DRS) and surface enhanced Raman scattering (SERS). It was found that the copper octahedra exhibited three characteristic bands,and SERS effect increases with the number of flakes within individual particles. Based on the experimental results,the mechanism for direct-current electrochemical growth of metal nanostructures was discussed. | ShaoChun Tang XiangKang Meng | 2009 | Science China(Technological Sciences)2009，52，9： | 2 |
| 6 | In-situ Reduction Synthesis of Bi/BiOI Heterostructure Films with High Photoelectrochemical Activity显示文摘The Bi/BiOI heterostructure films grew perpendicular to the FTO substrates were synthesized in-situ tlirough an electrochemical deposition and hydrogen reduction metliod. The metallic Bi nanoparticles were decorated onto the surface of BiOI nanosheets via an in-situ reduction, induced 6.3 times improvement of photocurrent density, compared to the pristine BiOI at 1.23 V vs. reversible hydrogen electrode(RHE).The enhancement of photoelectrochemical perfomiance was attributed not only to the efficient separation of charge resulted from surface plasmon resonance efleet, but also to the fast charge transfer at the interface due to the in-situ reduction of the films. This work provided a simple and facile strategy to in-situ construct heterostnicture films, and showed an effective metliod to improve the photoelectrochemical activity of Bi-based semiconductors. | LIU Yanfei CHU Yu DU Zhuoyang SUN Yan CAO Feng | 2019 | Chemical Research in Chinese Universities2019，35，4： | 1 |
| 7 | Pd/TiO2 Nanospheres with Three-dimensional Hyperstructure for Enhanced Photodegradation of Organic Dye显示文摘Pd/TiO2 nanospheres assembled from nanorods with three-dimensional hyperstructure for enlianced photodegradation of organic dye was prepared by a sample solvothemial method. Further, it was used for degradation of methyl orange(MO) under the illumination of visible-light(simulated).The results show that Pd/TiO2 with 2%(mass fraction) Pd exhibits the noticeable activity in photodegrading of MO.The detailed analysis shows that this enhancement is attributed to the reduction of the rate of electron-hole recombination and surface plasmon resonance of Pd. The high activity and good stability of the obtained Pd/TiO2 nano spheres make it a promising photocatalyst for solving the environmental pollution problems. | WANG Huan XIAO Liguang WANG Chao LIN Bin LYU Sa CHU Xuefeng CHI Yaodan YANG Xiaotian WANG Xinyan | 2019 | Chemical Research in Chinese Universities2019，35，4： | 1 |
| 8 | Polystyrene Based SPR Biosensor Chip for Use in Immunoassay显示文摘Biosensors are widely used in immunoassay. The biosensor chip carries a receptor which is used in immunoassay and the chip properties have an important influence on the detecting sensitivity of the biosensor. This paper describes a polystyrene\|based biosensor chip developed and used as part of a surface plasmon resonance (SPR) biosensor. The SPR biosensor has a much higher detecting sensitivity than enzyme\|linked immunoserbent assay (ELISA). | 杨军 隋森芳 | 1999 | Tsinghua Science and Technology1999，4，3： | 1 |
| 9 | Origin of strong and narrow localized surface plasmon resonance of copper nanocubes显示文摘Inexpe nsive copper nano particles are generally thought to possess weak and broad localized surface plasm on resonance(LSPR).The,present experimental and theoretical studies show that tailoring the Cu nanoparticle to a cubic shape results in a single intense,narrow,and asymmetric LSPR line shape,which is even superior to round-shaped gold nanoparticles.In this study,the dielectric function of copper is decomposed into an interband transition component and a free-electron component.This allows interband transition-induced plasmon damping to be visualized both spectrally and by surface polarization charges.The results reveal that the LSPR of Cu nanocubes originates from the comer mode as it is spectrally separated from the interb and transitions.In additi on,the interband tran sitions lead to severe damping of the local electromagnetic field but the cubic corner LSPR mode survives.Cu nanocubes display an extinction coefficient comparable to the dipole mode of a gold nanosphere with the same volume and show a larger local electromagnetic field enhancement These results will guider-development of in expensive plasmonic copper-based nano materials. | Peng Zheng Haibin Tang Botong Liu Sujan Kasani Ling Huang Nianqiang Wu | 2019 | Nano Research2019，12，1： | 1 |
| 10 | G protein b_1λ_2 subunits purification and their interaction with adenylyl cyclase显示文摘A preliminary study on the interaction of G protein (guanine triphosphate binding pro- tein) b1g2 subunits and their coupled components in cell signal transduction was conducted in vitro. The insect cell lines, Sf9 (Spodoptera frugiperda) and H5 (Trichoplusia ni ) were used to express the recombinant protein Gb1g2. The cell membrane containing Gb1g2 was isolated through affinity chromatography column with Ni-NTA agarose by FPLC method, and the highly purified protein was obtained. The adenylyl cyclase 2 (AC2) activity assay showed that the purified Gb1g2 could signifi-cantly stimulate AC2 activity. The interaction of b1g2 subunits of G protein with the cytoplasmic tail of various mammalian adenylyl cyclases was monitored by BIAcore technology using NTA sensor chip, which relies on the phenomenon of surface plasmon resonance (SPR). The experiments showed the direct binding of Gb1g2 to the cytoplasmic tail C2 domain of AC2. The specific binding domain of AC2 with Gb1g2 was the same as AC2 activity domain which was stimulated by Gb1g2. | 陈巨莲 倪汉祥 孙京瑞 WENG Gezhi | 2003 | Science China(Life Sciences)2003，46，2： | 1 |
| 11 | Effects of nanoscale features on infrared radiative properties of heavily doped silicon complex gratings显示文摘The infrared radiative properties of one heavily doped silicon complex grating and its corresponding four modified complex gratings with attached features at transverse magnetic wave incidence were numerically investigated by employing the finite-difference time-domain method.For the complex grating,by properly choosing the carrier concentration and geometry,it exhibited a broadband absorptance peak at wavelengths between 7 and 12μm resulting from the excitation of surface plasmon polaritons.As for the four modified complex gratings,though absorptance spectra of the gratings almost remained unchanged, their locations shifted towards longer wavelengths.Meanwhile,the spectral absorptance peaks of two modified complex gratings were wider than that of the grating without attached features.Such broadened peaks could be partly attributed to the cavity resonance within the grating structures demonstrated by the electromagnetic fields and Poynting vectors plots.Finally,through comparing the spectral absorptances of complex gratings with two symmetrical square features in three sizes,it was shown that the peak wavelength shifted toward longer wavelengths with enlarged feature size.This work theoretically laid a foundation for the optimized design and application of the infrared detector with high performance. | HSU PeiFeng | 2010 | Science China(Technological Sciences)2010，53，8： | 1 |
| 12 | Sensitivity Dependence of Surface Plasmon Resonance Based Sensors on Prism Refractive Index显示文摘We theoretically and experimentally demonstrate that refractive index of the prism used to load metal film has significant influence on sensitivity of surface plasmon resonance based sensors. The prism with lower refractive index gives the sensors a higher sensitivity in detecting refractive index variations of a sample. We attribute this effect to the fact that a prism with low refractive index will increase coupling distance between surface plasmons and the medium under investigation. | Wang Guo-ping Sugiura Tadao Kawata Satoshi | 2002 | Wuhan University Journal of Natural Sciences2002，7，1： | 1 |
| 13 | Enhanced organic solar cell performance: Multiple surface plasmon resonance and incorporation of silver nanodisks into a grating‐structure electrode显示文摘In this study, plasmonic nanostructures were examined to enhance the light harvesting of organic thin-film solar cells (OSCs) by multiple surface plasmon resonance (SPR) phenomena originating from the grating-coupled configuration with a Blu-ray Disc recordable (BD-R)-imprinted aluminum (Al) grating structure and the incorporation of a series of silver nanodisks (Ag NDs). The devices with such a configuration maximize the light utilization inside OSCs via light absorption, light scattering, and trapping via multiple surface plasmon resonances. Different types and sizes of metallic nanoparticles (NPs), i.e., gold nanoparticles (Au NPs), Ag nanospheres (Ag NSs), and Ag NDs, were used, which were blended separately in a PEDOT:PSS hole transport layer (HTL). The device structure comprised of grating- imprinted-Al/P3HT:PCBM/Ag ND:PEDOT:PSS/ITO. Results obtained from the J–V curves revealed that the power conversion efficiency (PCE) of grating-structured Al/P3HT:PCBM/PEDOT:PSS/ITO is 3.16%;this value is ~6% higher than that of a flat substrate. On the other hand, devices with flat Al and incorporated Au NPs, Ag NSs, or Ag NDs in the HTL exhibited PCEs ranging from 3.15% to 3.37%. Furthermore, OSCs with an Al grating substrate were developed by the incorporation of the Ag ND series into the PEDOT:PSS layer. Compared with that of a reference device, the PCEs of the devices increased to 3.32%–3.59%(11%–20% improvement), indicating that the light absorption enhancement at the active layer corresponds to the grating-coupled surface plasmon resonance and localized surface plasmon resonance excitations with strong near-field distributions penetrating into the active layer leading to higher efficiencies and subsequent better current generation. | Thitirat Putnin Chutiparn Lertvachirapaiboon Ryousuke Ishikawa Kazunari Shinbo Keizo Kato Sanong Ekgasit Kontad Ounnunkad Akira Baba | 2019 | Opto-Electronic Advances2019，2，7： | 1 |
| 14 | Insight into Superior Visible Light Photocatalytic Activity for Degradation of Dye over Corner-truncated Cubic Ag2O Decorated TiO2 Hollow Nanofibers显示文摘Ag2O/TiO2 heterostructure has been constructed by loading corner-truncated cubic Ag2O on the TiO2 hollow nanofibers via an electrospinning-precipitation method. Compared to individual Ag2O and TiO2, Ag2O/TiO2 heterostructure exhibits obviously enhanced photocatalytic activity for the photodegradation of methyl orange(MO) under visible light irradiation. The composite with molar ratio of Ag2O to TiO2 at 4:10 exhibits the best photocatalytic performance with MO degraded 93% in 6 min. The superior activity is mainly attributed to the surface plasmon resonance(SPR) effect of metallic Ag in-situ produced during the photocatalytic process, which can favor electron transfer to the conduction band of TiO2. This leads to the efficient separation of photogenerated carriers, thus a superior photodegradation activity. Moreover, the energy band alignments of Ag2O/TiO2 heterostructure are calculated, which provides strong support for the proposed mechanism. | 陈艺兰 许玉羡 林代峰 罗永晋 薛珲 陈庆华 | 2020 | Chinese Journal of Structural Chemistry2020，39，3： | 0 |
| 15 | Porphyrin Langmuir-Blodgett Thin Film for Organic Vapor Detection显示文摘The detection of volatile organic compounds (VOC’s) is a very important task due to stringent environmental standards and regulations on VOC’s in many countries.They are highly toxic and may cause metabolic diseases,genetic disorders,acute,chronic or long-term effects and cancer.In order to control the air quality and human health respect to standards and regulations gas sensors are widely used to measure the level of VOCs.The performance of the gas sensing devices mostly depends on the performance of the sensing materials which depends on their chemical structures.Organic materials are widely studied in the field of VOC’s sensor application due to their low cost,physical and chemical properties.Porphyrin molecule was deposited as an Langmuir-Blodgett thin film onto gold substrates for the study of sensor properties using benzene,toluene,ethyl benzene and xylene.Surface plasmon resonance technique was employed for the characterization of these LB films.A high quality and uniform Langmuir monolayer from the water surface can be transferred onto a gold coated substrate with a transfer ratio of over 90%.For the sensing application towards benzene vapor,this LB film yields a fast and almost fully reversible response to benzene in few seconds. | Rifat Cpan | 2019 | Journal of Physical Science and Application2019，9，1： | 0 |
| 16 | Nano-film aluminum-gold for ultra-high dynamic-range surface plasmon resonance chemical sensor显示文摘An analytical and experimental study of nanofilm aluminum (Al) for ultra-high dynamic range surface plasmon resonance (SPR) biosensor is presented in this article. A thin film of 16 nm Al is proposed for metallic sensing layer for SPR .s*ensoi For the protective layer, a 10 nm of gold (Au) layer was configured on top of Al as a protection layer. This ultra-high dynamic range of SPR biosensor reached the bulk refractive index sample limit up to 1.45 RIU. For the analytical study, with the assumption of anisotropic refractive indices experiment, the dynamic range showed a refractive index value of around 1.58 RIU. The refractive index value limit achieved by the proposed sensing design is potentially implemented in various applications, such as in chemical detection and environ- mental monitoring study with high refractive index solution sample. The experimental results are presented as a proof-of-concept of the proposed idea. | Briliant Adhi PRABOWO Dewa Putu HERMIDA Robeth Viktoria MANURUNG Agnes PURWIDYANTRI Kou-Chen LIU | 2019 | Frontiers of Optoelectronics2019，12，3： | 0 |
| 17 | Refractive index sensor based on high-order surface plasmon resonance in gold nanofilm coated photonic crystal fiber显示文摘We propose a novel kind of wide-range refractive index optical sensor based on photonic crystal fiber(PCF) covered with nano-ring gold film.The refractive index sensing performance of the PCF sensor is analyzed and simulated by the finite element method(FEM).The refractive index liquid is infiltrated into the cladding air hole of the PCF.By comparing the sensing performance of two kinds of photonic crystal fiber structures, a wide range and high sensitivity structure is optimized.The surface plasmon resonance(SPR) excitation material is chose as gold, and large gold nanorings are embedded around the first cladding air hole of the PCF.The higher order surface plasmon modes are generated in this designed optical fiber structure.The resonance coupling between the fundamental mode and the 5 th order surface plasmon polariton(SPP)modes is excited when the phase matching condition is matched.Therefore, the 3 rd loss peaks appear obvious red-shift with the increase of the analyte refractive index, which shows a remarkable polynomial fitting law.The fitnesses of two structures are 0.99 and 0.98, respectively.When the range of refractive indices is from 1.40 to 1.43, the two kinds of sensors have high linear sensitivities of 1604 nm/RIU and 3978 nm/RIU, respectively. | 范振凯 方少波 李曙光 魏志义 | 2019 | Chinese Physics B2019，28，9： | 0 |
| 18 | Revealing the plasmon coupling in gold nanochains directly from the near field显示文摘We studied the near-field properties of localized surface plasmon resonances in finite linear gold nanochains using photoemission electron microscopy(PEEM).The localization of the electromagnetic field in the near-field region was mapped at high spatial resolution.By tuning the excitation laser wavelength,we can obtain the near-field spectra,from which the energy splitting between longitudinal(L)and transverse(T)plasmon modes can be revealed.In particular,the L-mode red shifts and the T-mode blue shifts with increasing chain length.The red shift of the L-mode is highly dependent on the gap distance.In contrast,the T-mode almost remains constant within the range of gap distance we investigated.This energy splitting between the L-mode and the T-mode of metallic chains is in agreement with previous far-field measurements,where it was explained by dipole-dipole near-field coupling.Here,we provide direct proof of this near-field plasmon coupling in nanochains via the above-described near-field measurements using PEEM.In addition,we explore the energy transport along the gold nanochains under excitation at oblique illumination via PEEM measurements together with numerical simulations. | Quan Sun Han Yu Kosei Ueno Shuai Zu Yasutaka Matsuo Hiroaki Misawa | 2019 | Opto-Electronic Advances2019，2，4： | 0 |
| 19 | Processes underlying the laser photochromic effect in colloidal plasmonic nanoparticle aggregates显示文摘We have studied the dynamic and static processes occurring in disordered multiparticle colloidal Ag aggregates with natural structure and affecting their plasmonic absorption spectra under pico-and nanosecond pulsed laser radiations, as well as the physical origin responsible for these processes. We have shown that depending on the duration of the laser pulse,the mechanisms of laser modification of such aggregates can be associated both with changes in the resonant properties of the particles due to their heating and melting(picosecond irradiation mode) and with the particle shifts in the resonant domains of the aggregates(nanosecond pulses) which depend on the wavelength, intensity, and polarization of the radiation.These mechanisms result in formation of a narrow dip in the plasmonic absorption spectrum of the aggregates near the laser radiation wavelength and affect the shape and position of the dip. The effect of polydispersity of nanoparticle aggregates on laser photochromic reaction has been studied. | A E Ershov V S Gerasimov I L Isaev A P Gavrilyuk S V Karpov | 2020 | Chinese Physics B2020，29，3： | 0 |
| 20 | Tunable multiple plasmon resonances and local field enhancement of nanocrescent/nanoring structure显示文摘According to the plasmon hybridization theory, the plasmon resonance characteristics of the gold nanocrescent/nanoring(NCNR) structure are systematically investigated by the finite element method. It is found that the extinction spectra of NCNR structure exhibit multiple plasmon resonance peaks, which could be attributed to the result of the plasmon couplings between the multipolar plasmon modes of nanocrescent and the dipolar, quadrupolar, hexapolar, octupolar,decapolar plasmon modes of nanoring. By changing the geometric parameters, the intense and separate multiple plasmon resonance peaks are obtained and can be tuned in a wide wavelength range. It is further found that the plasmon coupling induces giant multipole electric field enhancements around the tips of the nanocrescent. The tunable and intense multiple plasmon resonances of NCNR structure may provide effective applications in multiplex biological sensing. | 王彬兵 周骏 陈栋 方云团 陈明阳 | 2015 | Chinese Physics B2015，24，8： | 0 |
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