NanoAndMore presents NANOSENSORS SuperSharpSilicon probes for high resolution imaging

nanoandmore2

PRESENTS:

Nanosensors

AFM Measurements on GaN Quantum Dots - Comparison
of different commercially available Probe Types

Corresponding Authors: O. Krause, krause@nanosensors.com C. Richter, richter@nanosensors.com

Platinum silicide probes

FIG. 1: AFM Image of GaN Quantum Dots on AIN
Topography measured with a SuperSharpSilicon™Tip

We perfomed high resolution AFM measurements on GaN Quantum Dots
(QDs) with different AFM probes (FIG. 3 to Fig.S).
Because of their well defined dimensions (lateral as well as vertical) in the
nanometer scale and their high density on substrate QDs (FIG. 2) are an
ideal structure to benchmark AFM probes concerning their resolution at
small structures.
FIG. 2: Schematic Structure of GaN Quantum Dots on AIN


High Perfomance

AFM-Probe

Conductive Diamond

FIG. 3: SEM Picture of a SuperSharpSilicon™ Tip

Due to the tip radius of better than 5nm and
the excellent aspect ratio at the very end of
the tip every QD can be displayed exactly.


Standard Silicon
AFM-Probe

Platinum coated probes

FIG. 4: SEM Picture of a Pointprobe Probe

Single QDs can be imaged well using this
probe type (radius<15nm), but at high density areas Qds cannot be separated very sharply.


Silicon Nitride
AFM-Probe

Platinum silicide probes

FIG. 5: SEM Picture of a typical Silicon Nitride AFM-Probe

The reduced tip radius of about 25nm and
the worse aspect ratio at the end of the tip
do not allow a "true visualisation" of QDs.




For more information you can visit www.nanoandmore.com

Views: 50

Tags: AFM, SPM-week

Comment

You need to be a member of The International NanoScience Community to add comments!

Join The International NanoScience Community

Welcome - about us

Welcome! Nanopaprika was cooked up by Hungarian chemistry PhD student in 2007. The main idea was to create something more personal than the other nano networks already on the Internet. Community is open to everyone from post-doctorial researchers and professors to students everywhere.

There is only one important assumption: you have to be interested in nano!

Nanopaprika is always looking for new partners, if you have any idea, contact me at editor@nanopaprika.eu

Dr. András Paszternák, founder of Nanopaprika

Publications by A. Paszternák:

Smartphone-Based Extension of the Curcumin/Cellophane pH Sensing Method

Pd/Ni Synergestic Activity for Hydrogen Oxidation Reaction in Alkaline Conditions

The potential use of cellophane test strips for the quick determination of food colours

pH and CO2 Sensing by Curcumin-Coloured Cellophane Test Strip

Polymeric Honeycombs Decorated by Nickel Nanoparticles

Directed Deposition of Nickel Nanoparticles Using Self-Assembled Organic Template,

Organometallic deposition of ultrasmooth nanoscale Ni film,

Zigzag-shaped nickel nanowires via organometallic template-free route

Surface analytical characterization of passive iron surface modified by alkyl-phosphonic acid layers

Atomic Force Microscopy Studies of Alkyl-Phosphonate SAMs on Mica

Amorphous iron formation due to low energy heavy ion implantation in evaporated 57Fe thin films

Surface modification of passive iron by alkylphosphonic acid layers

Formation and structure of alkylphosphonic acid layers on passive iron

Structure of the nonionic surfactant triethoxy monooctylether C8E3 adsorbed at the free water surface, as seen from surface tension measurements and Monte Carlo simulations

Next partner events of TINC

We are Media Partner of: