Piezoelectric Microscopy Improves Characterization of Ceramic Materials
Side view of the two types of AFM probes used. Credit: Study Authors.
A team of researchers from ICMAB has proved that unconventional AFM probes are suitable to acquire a trueness piezoelectric signal in Piezoresponse Force Microscopy. The work entitles “Diminish electrostatic in piezoresponse force microscopy through longer or ultra-stiff tips” published in the prestigious scientific journal Applied Surface Science(https://authors.elsevier.com/a/1WNqWcXa~oZkP).
Piezoresponse Force Microscopy is a strongly used characterization technique in the world of piezoelectrics. Each year almost 300 manuscripts included this technique in their research, while piezoelectric community publishes more than 5000 papers yearly.
In this work researchers test almost every single AFM conductive probe available in the market using a novel method that quantifies the electrostatic contribution in their measurements. The method relies into solving the mathematical expression called “correlation function” that describes the mathematical operations that a lock-in amplifier performs to acquire the signals. After the theoretical description, the same sample is studies with different AFM tips available in the market, through the use of two distinct type of tests.
In the first test, the researchers increment the piezoelectric signal, while maintaining constant the electrostatic contribution. By doing this, the mount of signal coming from piezoelectricity increases, and hence, the changes in the final results a dramatically different. From this test, it is found that longer tips provide the cleaner signal from the overall set of probes used. These results are confirmed through the use of independent experiments that corroborates the first results.
The implementation of this solution to the worldwide scientific community is immediate and can be used in absolutely any AFM manufacturer, which expands the importance and implications of this research.
This article has been republished from materials provided by Consejo Superior de Investigaciones Cientificas. Note: material may have been edited for length and content. For further information, please contact the cited source.
Diminish electrostatic in piezoresponse force microscopy through longer or ultra-stiff tips. Applied Surface Science, Volume 439, 1 May 2018, Pages 577-582, https://doi.org/10.1016/J.APSUSC.2018.01.080.
Sweet Spot of Activity in Immune System Key to Fighting CancerNews
Scientists have shown how stimulating a specific location on the surface of immune cells can be targeted with antibodies to help in their fight against cancer.READ MORE
Molecules Brilliantly IlluminatedNews
Researchers want to use brilliant infrared light to study molecular disease markers in much greater detail. The team has developed a powerful femtosecond light source which emits at wavelengths between 1.6 and 10.2 micrometers. This instrument should make it possible to detect organic molecules present in extremely low concentrations in blood or aspirated air.
Liquid Cell Transmission Electron Microscopy Gives Nanoscale InsightsNews
Scientists and engineers dug into the mechanisms that degrade sample quality in liquid cell transmission electron microscopy (LC-TEM). They developed an LC-TEM device that uses multiple windows and patterned features to explore the impacts of high-energy electron bombardment on nanoparticles and sensitive biological samples.READ MORE