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Thin Film Analysis by Nanomechanical Infrared Spectroscopy

[Image: see text] There is a fundamental need for techniques for thin film characterization. The current options for obtaining infrared (IR) spectra typically suffer from low signal-to-noise-ratios (SNRs) for sample thicknesses confined to a few nanometers. We present nanomechanical infrared spectro...

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Autores principales: Casci Ceccacci, Andrea, Cagliani, Alberto, Marizza, Paolo, Schmid, Silvan, Boisen, Anja
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6492230/
https://www.ncbi.nlm.nih.gov/pubmed/31058251
http://dx.doi.org/10.1021/acsomega.9b00276
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author Casci Ceccacci, Andrea
Cagliani, Alberto
Marizza, Paolo
Schmid, Silvan
Boisen, Anja
author_facet Casci Ceccacci, Andrea
Cagliani, Alberto
Marizza, Paolo
Schmid, Silvan
Boisen, Anja
author_sort Casci Ceccacci, Andrea
collection PubMed
description [Image: see text] There is a fundamental need for techniques for thin film characterization. The current options for obtaining infrared (IR) spectra typically suffer from low signal-to-noise-ratios (SNRs) for sample thicknesses confined to a few nanometers. We present nanomechanical infrared spectroscopy (NAM-IR), which enables the measurement of a complete infrared fingerprint of a polyvinylpyrrolidone (PVP) layer as thin as 20 nm with an SNR of 307. Based on the characterization of the given NAM-IR setup, a minimum film thickness of only 160 pm of PVP can be analyzed with an SNR of 2. Compared to a conventional attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) system, NAM-IR yields an SNR that is 43 times larger for a 20 nm-thick PVP layer and requires only a fraction of the acquisition time. These results pave the way for NAM-IR as a highly sensitive, fast, and practical tool for IR analysis of polymer thin films.
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spelling pubmed-64922302019-05-02 Thin Film Analysis by Nanomechanical Infrared Spectroscopy Casci Ceccacci, Andrea Cagliani, Alberto Marizza, Paolo Schmid, Silvan Boisen, Anja ACS Omega [Image: see text] There is a fundamental need for techniques for thin film characterization. The current options for obtaining infrared (IR) spectra typically suffer from low signal-to-noise-ratios (SNRs) for sample thicknesses confined to a few nanometers. We present nanomechanical infrared spectroscopy (NAM-IR), which enables the measurement of a complete infrared fingerprint of a polyvinylpyrrolidone (PVP) layer as thin as 20 nm with an SNR of 307. Based on the characterization of the given NAM-IR setup, a minimum film thickness of only 160 pm of PVP can be analyzed with an SNR of 2. Compared to a conventional attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) system, NAM-IR yields an SNR that is 43 times larger for a 20 nm-thick PVP layer and requires only a fraction of the acquisition time. These results pave the way for NAM-IR as a highly sensitive, fast, and practical tool for IR analysis of polymer thin films. American Chemical Society 2019-04-26 /pmc/articles/PMC6492230/ /pubmed/31058251 http://dx.doi.org/10.1021/acsomega.9b00276 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Casci Ceccacci, Andrea
Cagliani, Alberto
Marizza, Paolo
Schmid, Silvan
Boisen, Anja
Thin Film Analysis by Nanomechanical Infrared Spectroscopy
title Thin Film Analysis by Nanomechanical Infrared Spectroscopy
title_full Thin Film Analysis by Nanomechanical Infrared Spectroscopy
title_fullStr Thin Film Analysis by Nanomechanical Infrared Spectroscopy
title_full_unstemmed Thin Film Analysis by Nanomechanical Infrared Spectroscopy
title_short Thin Film Analysis by Nanomechanical Infrared Spectroscopy
title_sort thin film analysis by nanomechanical infrared spectroscopy
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6492230/
https://www.ncbi.nlm.nih.gov/pubmed/31058251
http://dx.doi.org/10.1021/acsomega.9b00276
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