Localized surface curvature artifacts in tip-enhanced nanospectroscopy imaging; Ultramicroscopy; Vol. 206

Localized surface curvature artifacts in tip-enhanced nanospectroscopy imaging; Ultramicroscopy; Vol. 206

Bibliographic Details
Parent link:Ultramicroscopy
Vol. 206.— 2019.— [112811, 8 p.]
Corporate Authors: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий (ИШХБМТ)
Other Authors: Sheremet E. S. Evgeniya Sergeevna, Kim L. R. Larisa Robertovna, Stepanishcheva D. I. Darjya Igorevna, Kolchuzhin V. A. Vladimir Anatoljevich, Milekhin A. G. Aleksandr Germanovich, Zahn D. R. T. Dietrich, Rodriguez (Rodriges) Contreras R. D. Raul David
Summary:Title screen
Tip-enhanced Raman spectroscopy (TERS) allows the chemical analysis with a spatial resolution at the nanoscale, well beyond what the diffraction limit of light makes possible. We can further boost the TERS sensitivity by using a metallic substrate in the so-called gap-mode TERS. In this context, the goal of this work is to provide a generalized view of imaging artifacts in TERS and near-field imaging that occur due to tip-sample coupling. Contrary to the case of gap-mode with a flat substrate where the size of the enhanced region is smaller than the tip size when visualizing 3D nanostructures the tip convolution effect may broaden the observed dimensions due to the local curvature of the sample. This effect is particularly critical considering that most works on gap-mode TERS consider a perfectly flat substrate which is rarely the case in actual experiments. We investigate a range of substrates to evidence these geometrical effects and to obtain an understanding of the nanoscale curvature role in TERS imaging. Our experimental results are complemented by numerical simulations and an analogy with atomic force microscopy artifacts is introduced. As a result, this work offers a useful analysis of gap-mode TERS imaging with tip- and substrate-related artifacts furthering our understanding and the reliability of near-field optical nanospectroscopy.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2019
Subjects:
электронный ресурс
труды учёных ТПУ
imaging artifacts
plasmonics
nanospectroscopy
scanning probe microscopy
плазмоника
зондовые методы
микроскопия
Online Access:https://doi.org/10.1016/j.ultramic.2019.112811
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662434

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