Novel nanostructures for SERS biosensing

Tripp, Ralph A.; Dluhy, Richard A.; Zhao, Yiping

doi:10.1016/s1748-0132(08)70042-2

Cited by 410 publications

(285 citation statements)

References 77 publications

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“…Materials with dimensions on the nanometer scale exhibit many interesting properties and may find opportunities in the detection of trace amounts of organic pollutants [8][9][10][11]. For example, using nanostructures of noble metals (Cu, Ag, and Au) as the substrate, some organic species have been detected in trace amounts by surface-enhanced Raman scattering (SERS) [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Rapid recognition of isomers of monochlorobiphenyls at trace levels by surface-enhanced Raman scattering using Ag nanorods as a substrate

Zhou

Yang

et al. 2010

Nano Res.

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Isomers and homologues of organic pollutants are hard to distinguish-especially in trace amounts-due to the similarities in their physical and chemical properties. We report here that by identifying the Raman characteristics of isomers of monochlorobiphenyls, these compounds can be recognized, even at trace levels, by using the surface-enhance Raman scattering method with silver nanorods as a substrate. When dissolved in acetone, 2-, 3-, and 4-chlorobiphenyls were detected at a concentration of 10 -8 mol/L, at which their characteristic Raman peaks were visible. This study may provide a fast, simple, and sensitive method for the detection and recognition of organic pollutants such as polychlorinated biphenyls.

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Section: Introductionmentioning

confidence: 99%

Rapid recognition of isomers of monochlorobiphenyls at trace levels by surface-enhanced Raman scattering using Ag nanorods as a substrate

Zhou

Yang

et al. 2010

Nano Res.

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“…15,16) Arrays of HfO 2 nanocolumns can be used as antireflection coating, and the antireflection rate can be adjust by GLAD conditions.…”

Section: -5)mentioning

confidence: 99%

“…[9][10][11][12][13][14] For example, arrays of Ag nanorods can be used as surface-enhanced Raman scattering substrates, and Rhodamine 6G molecules can be detected to a concentration limit of 10 À14 mol/L by this substrate. 15,16) Arrays of HfO 2 nanocolumns can be used as antireflection coating, and the antireflection rate can be adjust by GLAD conditions. 17) In this letter, we report our effort to build a simple model which is called hemisphere growth model to study the rule of glancing angle deposition.…”

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confidence: 99%

A Simple Model to Describe the Rule of Glancing Angle Deposition

Zhou

et al. 2011

Mater. Trans.

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A model was built to study the rule of glancing angle deposition. This model, which is called hemisphere model, is convenient to describe how the experimental conditions influence morphology of the nanostructures prepared by GLAD. Influence of experiment conditions such as incidence angle, incidence rate, substrate temperature, and substrate rotation rate are theoretical analyzed by the hemisphere model, and validated respectively by amount of experiments. As an application of the model, metals of different melting points were deposited into coherent multi-section nanorods by adjusting substrate temperature. Glancing angle deposition (GLAD) is a physical vapor deposition method which the trajectory of incident vapor flux is not parallel to the substrate normal, but depositing at oblique angles. K. Robbie and M. J. Brett had carried out this method, 1,2) and then M. M. Hawkeye and M. J. Brett analyzed the deposition mechanism. 3-5)GLAD technique is a simple but powerful means which is capable of producing thin films with pre-designed nanostructures such as nanopillars, slanted posts, zigzag columns, spirals, etc.6-8) These nanostructures can be used in a variety of fields, e.g., photonic crystals, magnetic storage media, and optoelectronic devices, etc.9-14) For example, arrays of Ag nanorods can be used as surface-enhanced Raman scattering substrates, and Rhodamine 6G molecules can be detected to a concentration limit of 10 À14 mol/L by this substrate. 15,16) Arrays of HfO 2 nanocolumns can be used as antireflection coating, and the antireflection rate can be adjust by GLAD conditions. 17)In this letter, we report our effort to build a simple model which is called hemisphere growth model to study the rule of glancing angle deposition. Influence of experiment conditions such as incidence angle, incidence rate, substrate temperature, and substrate rotation rate are theoretical analyzed by the hemisphere growth model, and validated respectively by amount of experiment. As an application of the model, metals of different melting point were deposited into coherent multi-section nanorods by adjusting substrate temperature.When deposition at oblique angles, after nucleation and initial growth, columns format following the structure zone model. 3,5) According to the structure zone model, when substrate temperature is lower than 0.3 melting point of target material, the film microstructure is composed of tapered columns with domed tops, and GLAD principally relies on these structures. On the basis of this, we build a model that incident vapor flux nucleates on the substrates and grows into close-packing hemispheres, and in GLAD process nanostructures grow from these hemispheres.It is well known that atomic shadowing and adatom diffusion are the dominate growth mechanisms in GLAD. When depositing at oblique angles, one hemisphere will form a shadow to nearby hemispheres as shown in Fig. 1. The diameter D of hemispheres is related to the temperature of the substrates when they form and the melting point of the material. Th...

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“…Therefore, the preparation of optical substrates with optimized properties is a very dynamic field of research, and, as there is no universal 'best' SERS platform, careful consideration of the analytical problem is required before choosing/designing a SERS sensor platform. Regarding the material, SERS has been obtained on electrodes, solid thin films and colloidal dispersions (Aroca et al 2005a;Tripp et al 2008). Metal colloids are advantageous for many reasons.…”

Section: Introductionmentioning

confidence: 99%

Surface-enhanced Raman scattering biomedical applications of plasmonic colloidal particles

Abalde‐Cela

Aldeanueva-Potel

Mateo-Mateo

et al. 2010

J. R. Soc. Interface.

200

177

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This review article presents a general view of the recent progress in the fast developing area of surface-enhanced Raman scattering spectroscopy as an analytical tool for the detection and identification of molecular species in very small concentrations, with a particular focus on potential applications in the biomedical area. We start with a brief overview of the relevant concepts related to the choice of plasmonic nanostructures for the design of suitable substrates, their implementation into more complex materials that allow generalization of the method and detection of a wide variety of (bio)molecules and the strategies that can be used for both direct and indirect sensing. In relation to indirect sensing, we devote the final section to a description of SERS-encoded particles, which have found wide application in biomedicine (among other fields), since they are expected to face challenges such as multiplexing and high-throughput screening.

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Novel nanostructures for SERS biosensing

Cited by 410 publications

References 77 publications

Rapid recognition of isomers of monochlorobiphenyls at trace levels by surface-enhanced Raman scattering using Ag nanorods as a substrate

Rapid recognition of isomers of monochlorobiphenyls at trace levels by surface-enhanced Raman scattering using Ag nanorods as a substrate

A Simple Model to Describe the Rule of Glancing Angle Deposition

Surface-enhanced Raman scattering biomedical applications of plasmonic colloidal particles

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