Carbon Nanospikes: Synthesis, characterization and application for high resolution AFM
Ekaterina A Obraztsova1, Dmitry V Basmanov2, Nikolai A Barinov2
1M.M. Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 10/16, 117997, Moscow, Russia; Federal Research and Clinical Center of Physical-Chemical Medicine, Malaya Pirogovskaya 1a, 119435, Moscow, Russia.
Ultramicroscopy
|November 18, 2018
Summary
We developed sharp, spike-like carbon structures for high-resolution atomic-force microscopy (AFM). These novel carbon tips enable sub-molecular imaging of biological molecules like DNA and streptavidin.
Area of Science:
- Materials Science
- Nanotechnology
- Biophysics
Background:
- Atomic-force microscopy (AFM) requires sharp probes for high-resolution imaging.
- Existing AFM probes often lack the necessary sharpness for resolving nanoscale biological structures.
Purpose of the Study:
- To synthesize and characterize novel, ultra-sharp carbon spike structures for AFM probes.
- To evaluate the performance of these carbon-tipped probes in high-resolution imaging of biological molecules.
Main Methods:
- Chemical vapor deposition of carbonaceous gas mixtures onto silicon AFM probes.
- Electron microscopy and Raman spectroscopy for structural and compositional analysis.
- AFM imaging of DNA and streptavidin molecules using the developed carbon tips.
Main Results:
- Successfully synthesized sharp, spike-like amorphous carbon structures with nanometer-scale dimensions at the probe apexes.
- Demonstrated high efficiency and resolution in AFM measurements of biological samples.
- Achieved sub-molecular resolution on DNA and streptavidin molecules.
Conclusions:
- Ultra-sharp carbon spikes synthesized via chemical vapor deposition are effective for high-resolution AFM.
- These novel AFM probes significantly enhance the ability to image biological molecules at the sub-molecular level.
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