Infrared Vibrational Spectroscopy of Functionalized Atomic Force Microscope Probes using Resonantly Enhanced Infrared Photoexpansion Nanospectroscopy. Issue 10 (24th May 2019)

• Record Type: Journal Article
• Authors: Jin, Mingzhou; Belkin, Mikhail A.
• Is Part Of: Small methods. Volume 3:Issue 10(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-24
• Subjects: AFM‐IR -- functionalized probes -- infrared spectroscopy -- nanospectroscopy -- self‐assembled monolayers; Nanotechnology -- Methodology -- Periodicals; Nanotechnology -- Periodicals; Periodicals; 620.5028
• DOI: 10.1002/smtd.201900018
• Languages: English
• ISSNs: 2366-9608

Abstract

Abstract: Reported is the measurement of infrared absorption spectra of 4‐nitrothiophenol and hydroxyl‐terminated hexa(ethylene glycol) molecules at apices of functionalized atomic force microscope (AFM) probes using resonantly enhanced infrared photoexpansion nanospectroscopy, also known as resonantly enhanced AFM‐IR technique. The experiment demonstrates the applicability of the AFM‐IR technique to perform spectroscopy of only a few tens of molecules on AFM tip apices and demonstrates the potential of the AFM‐IR technique to perform vibrational spectroscopic studies of chemical reactions and molecular conformational changes on the apices of functionalized AFM tips. Abstract : This paper reports measurements of infrared vibrational absorption spectra of molecules on the apices of functionalized atomic force microscope (AFM) tips. Only about 50 molecules contribute to the observed signal. The approach can be used to perform spectroscopic studies of chemical reactions and molecular conformational changes of only a few molecules using functionalized AFM probes.