Scanning near-field optical microscopy methods for studies of chemistry and materials approaching the atomic scale

Jeremy F. Schultz; Linfei Li; Sayantan Mahapatra; Nan Jiang; Andrea Centrone

doi:10.1117/12.2676846

5 October 2023 Scanning near-field optical microscopy methods for studies of chemistry and materials approaching the atomic scale

Jeremy F. Schultz, Linfei Li, Sayantan Mahapatra, Nan Jiang, Andrea Centrone

Author Affiliations +

Proceedings Volume PC12654, Enhanced Spectroscopies and Nanoimaging 2023; PC126540C (2023) https://doi.org/10.1117/12.2676846
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

The convergence of optical spectroscopy with scanning probe microscopy (SPM) provides a near-field sensitive platform that circumvents the limitations of light diffraction and can measure highly localized heterogeneity and phenomena. In ultrahigh vacuum (UHV) and at cryogenic temperatures the spatial resolution of these methods can be pushed towards the atomic scale. Here, efforts to use UHV scanning tunneling microscopy (STM) coupled with tip-enhanced Raman spectroscopy (TERS) to investigate the behavior and chemistry of molecular adsorbates on pristine and modified noble metal substrates are highlighted. Spectroscopic imaging provides the ability to visualize highly localized phenomena, while vibrational fingerprints derived from light-matter interactions can be used to understand their effects on a molecule’s or material’s structure. This can provide insight into adsorbate-substrate interactions crucial to the growth of nanostructures through surface chemistry, as well as the functionalization or modification of 2D materials. Moving beyond UHV-STM-TERS, ongoing work to develop a new versatile cryogenic UHV-SPM platform for other measurements will also be discussed. Specifically, STM-induced luminescence and the coupling of infrared light into the tip-sample junction provide the opportunity to investigate otherwise inaccessible properties of materials that include light-matter interactions and quasiparticles at the atomic scale.

Conference Presentation

Citation Download Citation

Jeremy F. Schultz, Linfei Li, Sayantan Mahapatra, Nan Jiang, and Andrea Centrone "Scanning near-field optical microscopy methods for studies of chemistry and materials approaching the atomic scale", Proc. SPIE PC12654, Enhanced Spectroscopies and Nanoimaging 2023, PC126540C (5 October 2023); https://doi.org/10.1117/12.2676846

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KEYWORDS

Near field scanning optical microscopy

Surface chemistry

Optical microscopy

Cryogenics

Imaging spectroscopy

Light-matter interactions

Scanning probe microscopy

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