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Dual nano-friction force microscopy/fluorescence microscopy imaging reveals the enhanced force sensitivity of polydiacetylene by pH and NaCl

10 February 2023, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The nano-friction force microscopy and the fluorescence microscopy were combined to study the effect of pH and ionic strength on the polydiacetylene (PDA) force-sensitivity at the nanoscale. We found that the increase in pH from 5.7 to 8.2 caused an enhancement in the force sensitivity by 8 folds. The elevation of NaCl concentration from 10 mM to 200 mM also made the PDA 5 times more force-sensitive. These results suggest that the PDA force sensitivity at the nanoscale can be conveniently enhanced by pre-stimulation with pH or ionic strength.

Keywords

polydiacetylene
friction force microscopy

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Version History

Feb 10, 2023 Version 1

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The content is available under CC BY NC ND 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2023-9vmj6
D O I: 10.26434/chemrxiv-2023-9vmj6 [opens in a new tab]

Funding

UTEC-UTokyo FSI Research Grant Program
the FY 2020 University of Tokyo Excellent Young Researcher
Takeda Science Foundation
Mitsubishi Foundation
Inoue Foundation for Science
Naito Foundation
Fuji Seal Foundation
Japan Society for the Promotion of Science
JP22K03544
Japan Society for the Promotion of Science
JP22H04525
Japan Science and Technology Agency
JPMJFR211Q
New Energy and Industrial Technology Development Organization
JPNP20004

Author’s competing interest statement

The author(s) have declared they have no conflict of interest with regard to this content

Ethics

The author(s) have declared ethics committee/IRB approval is not relevant to this content

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