Tip‐Enhanced Raman Spectroscopy (TERS) for Nanoscale Imaging and Analysis

Yano, Taka-aki; Kawata, Satoshi

doi:10.1002/9781118703601.ch7

Cited by 3 publications

(2 citation statements)

References 92 publications

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“…Over the past 15 years, extensive developments in tip-enhanced Raman scattering (TERS) have greatly benefited studies on molecular structures and interactions in the world of nanotechnology. − TERS is a technique that combines the advantages of scanning probe microscopy (SPM) and surface-enhanced Raman scattering (SERS). − SPM, e.g., atomic force microscopy (AFM) and scanning tunneling microscopy (STM), provides topological information on a sample surface in the nanoscale region, while SERS yields molecular information, such as molecular structure, inter/intramolecular interactions, and chemical reactions on trace molecules attached to a rough metal surface. , These two features can be obtained simultaneously at a given position by TERS. TERS applications have been demonstrated in many ways ,− including few- or single-molecule studies, ,− RNA sequencing, , mechanistic studies of biological molecules, , carbon nanotube and graphene characterization, ,− and TERS imaging/mapping. ,,,− …”

Section: Introductionmentioning

confidence: 99%

Nanoscale pH Profile at a Solution/Solid Interface by Chemically Modified Tip-Enhanced Raman Scattering

et al. 2016

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A nanoscale pH-profile on a 4×4 µm 2 area of NH 2 -anchored glass slide in an aqueous solution is constructed using chemically modified tip-enhanced Raman scattering (TERS). Para-mercaptobenzoic acid (pMBA) and para-aminothiophenol (pATP) are bonded to the tip surface. A pH change can be detected from a peak at 1422 cm -1 due to the -COOstretching vibration from pMBA and that at 1442 cm -1 due to the N=N stretching vibration arising from the formation of 4,4′-dimercaptoazobenzene (DMAB) on the pATP-modified tip.The pMBA-and pATP-modified tip can be used to determine pH in the range of 7-9 and 1-2, respectively. The spatial resolution to differentiate pH of two areas can be considered as ~400 nm. The measured pH becomes the pH of the bulk solution when the tip is far by ~200 nm from the surface. This technique suggests a possibility for the pH sensing in wet biological samples.TERS tips could also be chemically modified with other molecules to determine other properties in a solution.

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Section: Introductionmentioning

confidence: 99%

Nanoscale pH Profile at a Solution/Solid Interface by Chemically Modified Tip-Enhanced Raman Scattering

et al. 2016

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“…Tip-enhanced Raman scattering (TERS) spectroscopy is a technique that employs near-field enhancement from a metallic nanotip to obtain Raman spectra with spatial resolution surpassing the diffraction limit. − To achieve a good enhancement, the size, shape, and material of the tips must be carefully chosen to ensure plasmon resonance with the excitation laser light. , The evanescent field from this resonance is confined to a small area around the tip, resulting in the improvement of spatial resolution . This characteristic of TERS is very useful in graphene studies .…”

Section: Introductionmentioning

confidence: 99%

Tip-Enhanced Raman Scattering of the Local Nanostructure of Epitaxial Graphene Grown on 4H-SiC (0001̅)

et al. 2014

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Step, ridge, and crack submicro/nanostructures of epitaxial graphene on 4H-SiC (0001̅ ) were characterized using tip-enhanced Raman scattering (TERS) spectroscopy. The nanostructures were created during graphene synthesis due to a difference in the thermal expansion coefficient of graphene and SiC. These structures are a distinctive property of epitaxial graphene, together with other desirable properties, such as large graphene sheet and minimal defects. The results of this study illustrate that the exceptional spatial resolution of TERS allows spectroscopic measurements of individual nanostructures, a feat which normal Raman spectroscopy is not capable of. By analyzing TERS spectra, the change of local strain on the nanoridge and decreased graphene content in the submicrometer crack were detected. Using G′ band positions in the TERS spectra, the strain difference between the ridge center and flat area was calculated to be 1.6 × 10 −3 and 5.8 × 10 −4 for uniaxial and biaxial strain, respectively. This confirms the proposed mechanism in previous researches that nanoridges on epitaxial graphene form as a relief against compressive strain. With this study, we demonstrate that TERS is a powerful technique for the characterization of individual local nanostructures on epitaxial graphene.

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Classical light vs. nonclassical light: characterizations and interesting applications

Pathak

Ghatak

2017

Journal of Electromagnetic Waves and Applications

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We briefly review the ideas that have shaped modern optics and have led to various applications of light ranging from spectroscopy to astrophysics, and street lights to quantum communication. The review is primarily focused on the modern applications of classical light and nonclassical light. Specific attention has been given to the applications of squeezed, antibunched, and entangled states of radiation field. Applications of Fock states (especially single photon states) in the field of quantum communication are also discussed. *

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Tip‐Enhanced Raman Spectroscopy (TERS) for Nanoscale Imaging and Analysis

Cited by 3 publications

References 92 publications

Nanoscale pH Profile at a Solution/Solid Interface by Chemically Modified Tip-Enhanced Raman Scattering

Nanoscale pH Profile at a Solution/Solid Interface by Chemically Modified Tip-Enhanced Raman Scattering

Tip-Enhanced Raman Scattering of the Local Nanostructure of Epitaxial Graphene Grown on 4H-SiC (0001̅)

Classical light vs. nonclassical light: characterizations and interesting applications

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