Surface plasmon sensor with gold film deposited on a two-dimensional colloidal crystal

Li, Yuanyuan; Sun, Jie; Wang, Li; Zhan, Peng; Cao, Zhishen; Wang, Zhenlin

doi:10.1007/s00339-008-4543-x

Cited by 26 publications

(26 citation statements)

References 23 publications

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“…For the plasmonic structure containing the CC, a large portion of the field is localized inside the dielectric spheres at the main resonance, as confirmed by our numerical simulations [47]. This explains why a small change in transmission resonance wavelength was observed when the CC-supported plasmonic structure was immersed into solvents with different RI [48]. When the CC template is removed so that the half-shell array is supported directly on a planar substrate, the RI difference across the metal films reduces to a minimum, thus enabling resonant coupling of SPs on the opposite surfaces of the hole array [56].…”

Section: Quasi-3d Plasmonic Materials As Refractive Index Sensorssupporting

confidence: 81%

“…Motivated by the simplicity of our bottom-up fabrication method and the observed enhanced transmission characteristics (see Figure 4(b)), the quasi-3D metallic nanohole arrays were further studied to assess their potential for application as a SP sensor [47]. The sensitivity of the main transmission resonance of the metallic hollow half-shell array sensors can reach a value of 1192 nm/RIU change of the surrounding medium, which is a fivefold increase compared to that found before removal of the CC [48]. The sensitivity of the hollow Au half-shell array also outperforms previous individual or random ensembles of metallic nanoparticles including nanoprisms [49], half-coated colloids [50], shells [51], nanorices [52], rings [53] and crescents [54], which instead rely on localized SP enhanced absorption and scattering.…”

Section: Quasi-3d Plasmonic Materials As Refractive Index Sensorsmentioning

confidence: 98%

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Bottom-up fabrication approaches to novel plasmonic materials

et al. 2010

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Recent research effort towards developing novel metal nanoparticles (NPs) and their ordered arrays have been motivated by the emergence of plasmonics. In particular, tuning the size, morphology, composition and the separation of metal NPs has allowed us to engineer the collective properties of plasmonic crystals for specific applications. Here we present our recent development of bottom-up growth methods and demonstrate convenience for the preparation of such plasmonic materials. By implementation of physical, chemical, or electrochemical deposition of a metal in combination with micromolding on two-dimensional colloidal crystals, metallic NPs with a variety of morphologies can be created in an ordered lattice. The prepared novel plasmonic crystals could find applications in optics, optoelectronics, materials science, sensing and biophysics. surface plasmons, plasmonic crystal, colloidal crystal, transmission resonance, plasmonic sensor Citation: Chen Z, Zhan P, Dong W, et al. Bottom-up fabrication approaches to novel plasmonic materials. Metal nanoparticles (NPs) have been the subject of many detailed studies because of their distinct optical properties [1-3], which in most cases are associated with localized surface plasmon (SP) resonances [4]. When forming a periodic lattice, plasmon coupling between individual metal NPs may dramatically modify the optical responses [5]. To date, plasmonic materials have been explored for use in a wide range of applications such as waveguides, microscopes, light sources, lithographic tools, solar cells and biosensors [6-9].At present, plasmonic materials targeted for optical applications have mostly been manufactured by electron-beam lithography or focused ion-beam milling. However, these nanofabrication methods suffer the disadvantages of high fabrication cost and relatively long fabrication time, especially for large areas. Sophisticated chemical methods have been developed recently to routinely synthesize individual metallodielectric composite spheres with multi-shell structure [10-13] and metal colloids with controlled morphologies [14][15][16][17]. Nevertheless, it remains challenging to assemble metal NPs into an ordered lattice [8,[18][19][20] because of the difficulty in obtaining uniform NPs. Here, we summarize our recent development of bottom-up growth methods for the fabrication of plasmonic materials and demonstrate how large scale two-dimensional (2D) arrays of metallic NPs with controllable morphologies can be fabricated through colloidal crystal (CC) templating. In addition, our ability to control the shape of local elements allows for tunability of the optical response of the created plasmonic materials over the near-infrared (NIR) and visible spectrum range.

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Section: Quasi-3d Plasmonic Materials As Refractive Index Sensorssupporting

confidence: 81%

Section: Quasi-3d Plasmonic Materials As Refractive Index Sensorsmentioning

confidence: 98%

Bottom-up fabrication approaches to novel plasmonic materials

et al. 2010

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“…adsorption of molecular species) [19]. Alternatively, the specific near-field optical response of MFoCC has been exploited in surface-enhanced Raman scattering (SERS) for the detection of different analytes, for example glucose or anthrax biomarkers [20], and in experiments of metal-enhanced fluorescence [21].…”

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confidence: 99%

Understanding plasmon resonances of metal-coated colloidal crystal monolayers

et al. 2012

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Metal films deposited over two-dimensional colloidal crystals (MFoCC) constitute a low-cost periodic structure with interesting photonic and plasmonic properties. It has previously been shown that this structure exhibits a behaviour similar to the well-known Extraordinary Optical Transmission (EOT) of metallic hole arrays in planar films. Here, we explore the transmission characteristics of AgFoCC by systematic comparison with that of the bare CC. Furthermore with additional reflectivity measurements we evaluate the AgFoCC overall plasmonic response, which, notably, exhibits a strong plasmon absorption band at wavelengths larger than those of the transmitted maximum. By corroborating these results with finite-difference time-domain electromagnetic simulations, we identify a hybrid metal-dielectric propagative mode in the transmission mechanism. On the contrary a strongly localized mode is responsible for the maximum light absorption by this structure. These results shed new light on the current understanding of this highly promising plasmonic structure, being useful for the design of surface-enhanced Raman scattering and enhanced fluorescence substrates.

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“…[11][12][13][14][15][16][17][18][19][20][21] Transmission and absorption spectra of the 2D arrays can be easily tailored in the visible range and near infrared range by varying thickness and roughness of the semishells as well as dielectric properties and size of the spheres constituting the colloidal crystal. 12,15,16,20,21 Consequently, the metal semishell arrays have been applied to surface-enhanced Raman scattering (SERS), 11,17,[19][20][21] surface-enhanced fluorescence (SEF), 14,16,20 plasmonic refractometry, 15 and plasmonic enhancement of photocurrents. 18 Nevertheless, to the best of our knowledge, PICS behavior of metal semishell arrays has not yet been reported.…”

mentioning

confidence: 99%

“…The difference in the coverage between the sputtered and evaporated semishells may be explained in terms of directionality of sputtered metal ions and evaporated metal atoms. Actually, the most of metal halfshell structures have been fabricated by evaporation, [14][15][16][17][18][19][20] while sputtering gives structures more like core-shell particles. 21 The optical absorption spectra of SiO 2 @TiO 2 colloidal crystals with and without Au semishells were collected by a spectrophotometer (V-670, JASCO) equipped with an integrating sphere.…”

mentioning

confidence: 99%

Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO2@TiO2 colloidal crystals

Nishi

Tatsuma

2015

APL Materials

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Photoelectrodes based on plasmonic Au semishell (or halfshell) arrays are developed. A colloidal crystal consisting of SiO2@TiO2 core-shell particles is prepared on a TiO2-coated transparent electrode. A Au semishell (or halfshell) array is deposited by sputtering or evaporation on the colloidal crystal. An electrode with the semishell (or halfshell) array exhibits negative photopotential shifts and anodic photocurrents under visible light at 500-800 nm wavelengths in an aqueous electrolyte containing an electron donor. In particular, hydroquinone and ethanol are good electron donors. The photocurrents can be explained in terms of plasmon-induced charge separation at the Au-TiO2 interface.

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Surface plasmon sensor with gold film deposited on a two-dimensional colloidal crystal

Cited by 26 publications

References 23 publications

Bottom-up fabrication approaches to novel plasmonic materials

Bottom-up fabrication approaches to novel plasmonic materials

Understanding plasmon resonances of metal-coated colloidal crystal monolayers

Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO2@TiO2 colloidal crystals

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