Noncontact tip-enhanced Raman spectroscopy for nanomaterials and biomedical applications
| Autor: | Alexei P. Sokolov, Ivan Vlassiouk, Nickolay V. Lavrik, Georgios Polizos, Alexander Kisliuk, Bobby G. Sumpter, Duane D. Miller, A. A. Volodin, Dmitry Voylov, Thirumagal Thiyagarajan, Y.M. Shulga, Vera Bocharova, Ramesh Narayanan |
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| Rok vydání: | 2019 |
| Předmět: |
Chemical imaging
Materials science Resolution (electron density) General Engineering Bioengineering Nanotechnology General Chemistry Tip-enhanced Raman spectroscopy Atomic and Molecular Physics and Optics Nanomaterials symbols.namesake Scanning probe microscopy symbols General Materials Science Raman spectroscopy Nanoscopic scale Image resolution |
| Zdroj: | Nanoscale advances. 1(9) |
| ISSN: | 2516-0230 |
| Popis: | Tip-enhanced Raman spectroscopy (TERS) has been established as one the most efficient analytical techniques for probing vibrational states with nanoscale resolution. While TERS may be a source of unique information about chemical structure and interactions, it has a limited use for materials with rough or sticky surfaces. Development of the TERS approach utilizing a non-contact scanning probe microscopy mode can significantly extend the number of applications. Here we demonstrate a proof of the concept and feasibility of a non-contact TERS approach and test it on various materials. Our experiments show that non-contact TERS can provide 10 nm spatial resolution and a Raman signal enhancement factor of 105, making it very promising for chemical imaging of materials with high aspect ratio surface patterns and biomaterials. |
| Databáze: | OpenAIRE |
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