Posts in Category SPM / AFM

Synchronization of HF2LI/UHFLI with External Scan Engines for Image Acquisition

on 10.09.2014 at 23:50 by Romain Stomp on Blog of Romain Stomp
Since a lock-in amplifier is most of all used for synchronous measurements, it comes at no surprise that many HF2 or UHF users want to synchronize saved demodulated sample with their scan generator either for mapping, scanning or imaging in […]

How to Achieve More Stable Z-feedback in FM-AFM Mode

on 15.05.2014 at 16:38 by Romain Stomp on Blog of Romain Stomp
The challenge with FM-AFM mode (or NC-AFM for Non-Contact Atomic Force Microscopy) is that tip-sample interaction can be either attractive (negative frequency shift, -df) or repulsive (positive frequency shift, +df) which leads to different parameter settings for the Z feedback […]

What it Takes for High-Speed AFM Measurements

on 19.02.2014 at 14:06 by Romain Stomp on Blog of Romain Stomp
Typically for biological and catalysis applications, time matters! And AFM images that record in 10 minutes or more are not acceptable. We often receive inquiries about what constitutes a complete solution for ‘fast AFM’ and what Zurich Instruments can offer […]

Tracking Resonance Frequency without Phase: the DFRT Method

on 18.10.2013 at 18:47 by Romain Stomp on Blog of Romain Stomp
For high Q-factor resonator (> 500), it is a common method for SPM application to use a Phase Locked Loop (PLL) to track the change in cantilever frequency: the high phase sensitivity at 90° guarantees accurate measurements and stable PID […]

How to set-up Kelvin Probe Feedback (FM-KPFM) with Direct Sideband Detection

on 28.08.2013 at 15:50 by Romain Stomp on Blog of Romain Stomp
HF2 users can already find valuable information on the HF2LI-MOD option in earlier blogs such as in Exploring the HF2LI-MOD: Measuring Bessel Functions for the difference between tandem and (direct) sideband detection or even schematics of various KPFM configurations in […]

HF2PLL for KPFM Applications

on 14.04.2013 at 13:17 by andreas on Blog of Andreas Senn
Kelvin Probe Force Microscopy (KPFM) is a scanning technique that allows the detection of a electrostatic potential distribution of a surface. The HF2PLL supports several variants of KPFM, some of them are mentioned in this post. Amplitude modulated KPFM (AM-KPFM) […]

Q-Control Example VI Tutorial

on 04.12.2012 at 19:45 by andreas on Blog of Andreas Senn
Using a Zurich Instruments lock-in amplifier, you are enabled to measure the quality factor of an arbitrary resonator – typically a resonant beam used in non-contact atomic force microscopy (NC-AFM) applications. This can be useful e.g. to increase phase sensitivity […]

Using TipProtect to extend AFM tip life expectancy

on 03.12.2012 at 14:51 by andreas on Blog of Andreas Senn
Using a Zurich Instruments Lock-In amplifier, you are enabled to perform a multitude of AFM measurement modes. Particularly interesting is NC-AFM operation which makes use of the built-in PLL capability. Earlier, a user could easily crash his tip into a […]

Connecting the Nanosurf Manual Controller to a Zurich Instruments HF2LI or HF2PLL

on 02.04.2012 at 09:39 by andreas on Blog of Andreas Senn
In March 2011, Nanosurf and Zurich Instruments announced a cooperation to establish the HF2PLL as official upgrade path for Nanosurf’s EasyPLL. This post shows how to connect Nanosurf’s Manual Controller to the Zurich Instruments HF2PLL. The Manual Controller combined with […]

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