Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > New Atomic Force Microscope to study piezoelectrics at the nanoscale

3D composition mapping obtained from the new DPFM mode. Both the electrogenerated charge and the electromechanical behavior are obtained for a sample composed of Periodically Poled Lithium Niobate.
3D composition mapping obtained from the new DPFM mode. Both the electrogenerated charge and the electromechanical behavior are obtained for a sample composed of Periodically Poled Lithium Niobate.

Abstract:
A team of researchers have created a new Atomic Force Microscope called “Direct Piezoelectric Force Microscopy” (DPFM). In particular, they measure the tiny currents produced by the piezoelectric effect with a transimpedance amplifier, which consists into a current-to-voltage converter. The work entitles “Piezo-generated charge mapping revealed through direct piezoelectric force microscopy” published in the prestigious scientific journal Nature Communications.

New Atomic Force Microscope to study piezoelectrics at the nanoscale

Barcelona, Spain | Posted on October 29th, 2017

In this particular research, the material is stressed by the AFM tip with nanometric size. The tip applies a force in the range of hundreds of microNewton and measures the generated charge that is created into the material. The new mode was proved by characterizing several common ferroelectric materials: A Periodically Poled Lithium Niobate, Bismuth Ferrite and different Lead Zirconate Titanate. The mode is employed in standard constant force contact mode AFM, by using a solid platinum tip with part number RMN-25Pt200H. As the mapping is performed in constant mode, the amplifier gives zero signal while scanning a single domain, however, where the tip crosses a domain, a current is generated as a consequence of the inversion of the generated charge. The researchers are able to integrate the current obtained in order to estimate the generated charge by the material. The charges recorded are 5fC for Periodically Poled Lithium Niobate, 25 fC for Bismuth Ferrite and 90fC for Lead Zirconate Tantalate. Just few quantities are really quantitative in AFM, being one of them the force applied by the tip. By known the force and integrating the current generated, researchers are able to estimate the d33 piezoelectric constant of the materials scanned. Force-vs-distance curves where the tip is placed in one spot and the force applied is changed through a constant force rate applied. By performing such experiments, researchers are able to distinguish between down and up domains, and it opens a window into made spectroscopy experiments quantitative.

The research focused into the mapping of Piezogenerated charge of a piezoelectric material. Piezoelectricity is a property where a charge is generated by a material as a consequence of a mechanical stress applied to the material. In this particular research, the material is stressed by a tiny needle, an AFM tip with nanometric size. The tip applied a force in the range of 100 microNewton and measures the generated charge that is created into the material. The total charge collected for each material was 5fC for Periodically Poled Lithium Niobate, 25 fC for Bismut Ferrite and 90fC for Lead Zirconate Titanate. This new mode enhances Atomic Force Microscopy as a key future technique available for material research and opens a future into counting electrons at the nanoscale.

“More info: Piezo-generated charge mapping revealed through Direct Piezoelectric Force Microscopy, A. Gomez et al. , Nature Communications (2017), DOI: 10.1038/s41467-017-01361-2”

####

For more information, please click here

Contacts:
Campus de la Universitat Autònoma de Barcelona
08193 Bellaterra, Catalunya, Espanya
Telf.: +34 935 801 853
Fax.: +34 935 805 729

Copyright © Campus de la Universitat Autònoma de Barcelona

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Switching with molecules: Molecular switch will facilitate the development of pioneering electro-optical devices May 25th, 2018

Tunable diamond string may hold key to quantum memory: A process similar to guitar tuning improves storage time of quantum memory May 24th, 2018

Remote control of transport through nanopores: New study outlines key factors affecting the transfer of molecules through biological channels May 24th, 2018

2018 Kavli Prizes in Astrophysics, Nanoscience, and Neuroscience to be Announced Live on May 31: Live announcement at the Norwegian Academy of Science and Letters to be streamed live at World Science Festival Event May 24th, 2018

Imaging

Columbia Researchers Squeeze Light into Nanoscale Devices and Circuits: Team is first to directly image propagation and dynamics of graphene plasmons at very low temperatures; findings could impact optical communications and signal processing May 23rd, 2018

NIST Puts the Optical Microscope Under the Microscope to Achieve Atomic Accuracy May 22nd, 2018

Elastic microspheres expand understanding of embryonic development and cancer cells May 15th, 2018

Nanoscale measurements 100x more precise, thanks to improved two-photon technique May 8th, 2018

Discoveries

Switching with molecules: Molecular switch will facilitate the development of pioneering electro-optical devices May 25th, 2018

Tunable diamond string may hold key to quantum memory: A process similar to guitar tuning improves storage time of quantum memory May 24th, 2018

Remote control of transport through nanopores: New study outlines key factors affecting the transfer of molecules through biological channels May 24th, 2018

'Spooky action at a distance': Researchers develop module for quantum repeater May 23rd, 2018

Announcements

Switching with molecules: Molecular switch will facilitate the development of pioneering electro-optical devices May 25th, 2018

Tunable diamond string may hold key to quantum memory: A process similar to guitar tuning improves storage time of quantum memory May 24th, 2018

Remote control of transport through nanopores: New study outlines key factors affecting the transfer of molecules through biological channels May 24th, 2018

2018 Kavli Prizes in Astrophysics, Nanoscience, and Neuroscience to be Announced Live on May 31: Live announcement at the Norwegian Academy of Science and Letters to be streamed live at World Science Festival Event May 24th, 2018

Tools

Columbia Researchers Squeeze Light into Nanoscale Devices and Circuits: Team is first to directly image propagation and dynamics of graphene plasmons at very low temperatures; findings could impact optical communications and signal processing May 23rd, 2018

NIST Puts the Optical Microscope Under the Microscope to Achieve Atomic Accuracy May 22nd, 2018

Self-assembling 3D battery would charge in seconds May 22nd, 2018

A micro-thermometer to record tiny temperature changes May 15th, 2018

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Self-assembling 3D battery would charge in seconds May 22nd, 2018

Mining for gold with a computer: Texas A&M team gleans new insights on key material May 3rd, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Ultra-powerful batteries made safer, more efficient: Team aims to curb formation of harmful crystal-like masses in lithium metal batteries April 12th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project