Tip-enhanced Raman spectroscopy for surfaces and interfaces

2017 ◽  
Vol 46 (13) ◽  
pp. 4020-4041 ◽  
Author(s):  
Xiang Wang ◽  
Sheng-Chao Huang ◽  
Teng-Xiang Huang ◽  
Hai-Sheng Su ◽  
Jin-Hui Zhong ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Structure Function ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Surfaces And Interfaces ◽  
Function Correlation ◽  
Tip Enhanced Raman Spectroscopy

TERS offers the high spatial resolution to establish structure-function correlation for surfaces and interfaces.

scholarly journals Fabrication of highly uniform nanoprobe via the automated process for tip-enhanced Raman spectroscopy

Nanophotonics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 2989-2996
Author(s):  
Dong Hyeon Kim ◽  
Chanwoo Lee ◽  
Byeong Geun Jeong ◽  
Sung Hyuk Kim ◽  
Mun Seok Jeong
Keyword(s):  
Raman Spectroscopy ◽  
Human Error ◽  
Acidic Solution ◽  
High Spatial Resolution ◽  
Electrochemical Etching ◽  
Radius Of Curvature ◽  
Enhanced Raman Scattering ◽  
Tip Enhanced Raman Spectroscopy ◽  
Highly Uniform ◽  
Etching System

AbstractIn a tip-enhanced Raman spectroscopy (TERS) system, using a sharp nanotip that comprises a noble metal is critical to attaining high spatial resolution and highly enhanced Raman scattering. A strongly acidic solution is typically used to fabricate gold nanotips in a quick and reliable manner. However, using an acidic solution could corrode the etching system, thereby posing hazardous problems. Therefore, both the corrosion of the etching system and human error induced by the conventional method considerably decrease the quality and reproducibility of the tip. In this study, we significantly increased the reproducibility of tip fabrication by automating the electrochemical etching system. In addition, we optimized the etching conditions for an etchant that comprised a KCl solution to which ethanol was added to overcome the limitations of the acidic etchant. The automated etching system significantly increases the yield rate of tip-fabrication reproducibility from 65 to 95%. The standard deviation of the radius of curvature decreased to 7.3 nm with an average radius of curvature of 30 nm. Accordingly, the automated electrochemical etching system might improve the efficiency of TERS.

Aperture based Raman spectroscopy on SiGe film structures with high spatial resolution

2008 ◽  
Vol 39 (4) ◽  
pp. 435-438 ◽  
Author(s):  
A. Mai ◽  
L. Zhu ◽  
M. Hecker ◽  
J. Rinderknecht ◽  
C. Georgi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spatial Resolution ◽  
High Spatial Resolution

Nanoscale chemical imaging of solid–liquid interfaces using tip-enhanced Raman spectroscopy

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 1815-1824 ◽  
Author(s):  
Naresh Kumar ◽  
Weitao Su ◽  
Martin Veselý ◽  
Bert M. Weckhuysen ◽  
Andrew J. Pollard ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spatial Resolution ◽  
Chemical Imaging ◽  
Liquid Interfaces ◽  
New Approach ◽  
Immersed Surfaces ◽  
Nanoscale Chemical Imaging ◽  
Tip Enhanced Raman Spectroscopy ◽  
Solid Liquid

New approach to TERS probe coating enables chemical imaging of liquid-immersed surfaces with nanoscale spatial resolution.

Nanoscale mapping of intrinsic defects in single-layer graphene using tip-enhanced Raman spectroscopy

2016 ◽  
Vol 52 (53) ◽  
pp. 8227-8230 ◽  
Author(s):  
Weitao Su ◽  
Naresh Kumar ◽  
Ning Dai ◽  
Debdulal Roy
Keyword(s):  
Raman Spectroscopy ◽  
Spatial Resolution ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Intrinsic Defect ◽  
Intrinsic Defects ◽  
Layer Graphene ◽  
Tip Enhanced Raman Spectroscopy ◽  
20 Nm

Non-gap TERS with a contrast of 8.5 enables TERS mapping of graphene's intrinsic defect with a spatial resolution of 20 nm.

Use of radiochromic film as a high-spatial resolution dosimeter by Raman spectroscopy

2016 ◽  
Vol 43 (8Part1) ◽  
pp. 4520-4528 ◽  
Author(s):  
Jamal Ahmad Mirza ◽  
Hyeonsuk Park ◽  
So-Yeon Park ◽  
Sung-Joon Ye
Keyword(s):  
Raman Spectroscopy ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Radiochromic Film

scholarly journals Molecular imaging of atherosclerosis: spotlight on Raman spectroscopy and surface-enhanced Raman scattering

Heart ◽  
2017 ◽  
Vol 104 (6) ◽  
pp. 460-467 ◽  
Author(s):  
Neil MacRitchie ◽  
Gianluca Grassia ◽  
Jonathan Noonan ◽  
Paul Garside ◽  
Duncan Graham ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Molecular Imaging ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Photon Emission ◽  
Surface Enhanced Raman Spectroscopy ◽  
Emission Tomography ◽  
Good Spatial Resolution ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

To accurately predict atherosclerotic plaque progression, a detailed phenotype of the lesion at the molecular level is required. Here, we assess the respective merits and limitations of molecular imaging tools. Clinical imaging includes contrast-enhanced ultrasound, an inexpensive and non-toxic technique but with poor sensitivity. CT benefits from high spatial resolution but poor sensitivity coupled with an increasing radiation burden that limits multiplexing. Despite high sensitivity, positron emission tomography and single-photon emission tomography have disadvantages when applied to multiplex molecular imaging due to poor spatial resolution, signal cross talk and increasing radiation dose. In contrast, MRI is non-toxic, displays good spatial resolution but poor sensitivity. Preclinical techniques include near-infrared fluorescence (NIRF), which provides good spatial resolution and sensitivity; however, multiplexing with NIRF is limited, due to photobleaching and spectral overlap. Fourier transform infrared spectroscopy and Raman spectroscopy are label-free techniques that detect molecules based on the vibrations of chemical bonds. Both techniques offer fast acquisition times with Raman showing superior spatial resolution. Raman signals are inherently weak; however, leading to the development of surface-enhanced Raman spectroscopy (SERS) that offers greatly increased sensitivity due to using metallic nanoparticles that can be functionalised with biomolecules targeted against plaque ligands while offering high multiplexing potential. This asset combined with high spatial resolution makes SERS an exciting prospect as a diagnostic tool. The ongoing refinements of SERS technologies such as deep tissue imaging and portable systems making SERS a realistic prospect for translation to the clinic.

scholarly journals Spatial resolution of tip-enhanced Raman spectroscopy – DFT assessment of the chemical effect

Nanoscale ◽  
2016 ◽  
Vol 8 (19) ◽  
pp. 10229-10239 ◽  
Author(s):  
Federico Latorre ◽  
Stephan Kupfer ◽  
Thomas Bocklitz ◽  
Daniel Kinzel ◽  
Steffen Trautmann ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spatial Resolution ◽  
Chemical Effect ◽  
Tip Enhanced Raman Spectroscopy
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