Instrument #1: Long Beach
This instrument is a modified TT-AFM from AFM Workshop.
It is equipped with two scanners, enabling large (low resolution) or small (high resolution) sample imaging. It has an standard liquid cell for in-situ measurements, and a custom-made liquid heater cell (ambient to 60 celcius), with 0.1 degree accuracy. It has been upgraded with two new ADC cards, so it's now capable of recording 12 channels simultaneously, and displaying a life feed of height, scanner voltage, amplitude, etc (see left image above). It's installed in a custom-made vibration and acoustic isolation cabinet.
Here are more detailed specifications:
- Instrument Configuration: Optical lever - based sample-scanning AFM
- Sample Size: Maxmium ca. 20x20x5 mm
- Imaging Modes: vibrating (tapping), non-vibrating (contact), phase imaging, lateral force microscopy (friction force microscopy)*
- Imaging Environment: Air or Liquid.
- Imaging temperature ambient to 60 ºC
- Z-translation: Vertical direct drive (1 micron resolution)
- XY Translation: Manual
- Video Optical Microscope: Zoom to 400X, 3 micron resolution (3M pixel camera)
- Scan Range: 50x50x17 microns or 20x20x7 microns
- Linearisation: All axes (x, y and z) with strain guages, can be turned off for enhanced signal to noise ratio
- Z noise level: less than 0.2 Angstrom
- Vibration isolation: Passive vibration isolation, with acoustic shielding
Instrument #2: San Diego
This is a Life Sciences AFM (model B) from AFM Workshop. It is a probe-scanning AFM with maximum 50 micron scan range. it is mounted on an inverted optical microscope, equipped for brightfield, phase, and fluorescence microscopy. We have both air and liquid scanning-capable probe holders. It is typically used for cell studies and other transparent samples. UPDATE: This instrument currently not available.
Booking Schedules and Calendars:
Click the link below to see the Longbeach Google calendar
LS-AFM -San Diego - Calendar currently not available
Here are just a few example images measured with the TT-AFM instrument on a variety of samples.
- Startup Procedure
- Shutdown Procedure
- Insertion and laser alignment of probes
- Scanning in contact "non-vibrating" mode
- Approaching in vibrating mode
- Scanning in tapping or "vibrating" mode
- Opening files: We recommend using Gwyddion version 2.22 or later.
- These protocols may be outdated, meanwhile, here is a link to the latest version of the protocols document for use of "Long Beach": TTAFM_protocols.pdf