resumo
Nondestructive scanning probe microscopy of fragile nanoscale objects is currently in increasing need. In this paper, we report a novel atomic force microscopy mode, HybriD Piezoresponse Force Microscopy (HD-PFM), for simultaneous nondestructive analysis of piezoresponse as well as of mechanical and dielectric properties of nanoscale objects. We demonstrate this mode in application to self-assembled diphenylalanine peptide micro- and nanotubes formed on a gold-covered substrate. Nondestructive in- and out-of-plane piezoresponse measurements of tubes of less than 100 nm in diameter are demonstrated for the first time. High-resolution maps of tube elastic properties were obtained simultaneously with HD-PFM. Analysis of the measurement data combined with the finite-elements simulations allowed quantification of tube Young's modulus. The obtained value of 29 +/- 1 GPa agrees well with the data obtained with other methods and reported in the literature. (C) 2017 Elsevier B.V. All rights reserved.
palavras-chave
NANOSTRUCTURES; FABRICATION; ARRAYS
categoria
Microscopy
autores
Kalinin, A; Atepalikhin, V; Pakhomov, O; Kholkin, AL; Tselev, A
nossos autores
Alexander Tselev
Investigador Principal
Andrei Kholkin
Investigador JubiladoProjectos
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)
Phase transitions and ferroelectricity in self-assembled peptides nanotubes (TUBITAK)
agradecimentos
AK and VA acknowledge R&D department of NT-MDT Spectrum Instruments. ALK and AT acknowledge CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013) financed by national funds through the FCT/MEC and, when applicable, cofinanced by FEDER under the PT2020 Partnership Agreement. ALK is also grateful to the project TUBITAK/0006/2014 for the financial support. In part, this work was supported by the Government of Russian Federation(Grant 074-U01) and by the Ministry of Education and Science of Russian Federation (Project 11.4942.2017/6.7).