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Typical deflection sensitivity of Icon

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Answered (Verified) This post has 1 verified answer | 2 Replies | 2 Followers

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brownka posted on Mon, Sep 12 2011 9:00 AM

Hello,

What are typical deflection sensitivities you'd expect for a contact mode and tapping mode probe? General ranges are fine I just want to make sure I'm calibrating properly.

Cheers,

Keith

 

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Answered (Verified) Bede Pittenger replied on Mon, Sep 12 2011 12:56 PM
Verified by brownka

Deflection sensitivity depends on:

  1. The shape of the laser spot when it hits the PSD (how does the response change as a function of spot position)
  2. The length of the cantilever and how it bends along its length (since we are using an optical lever, this determines how much the spot moves)
  3. The geometry and electronics of your particular AFM

There are a lot of different probes used for Contact Mode and Tapping Mode, but below are some estimates (for air).  Don't be surprised if you see variations of 20-30% from these numbers:

ScanAsyst-Air 60
ScanAsyst-Fluid 30
SNL-A 60
SNL-B 110
SNL-C 60
SNL-D 110
TESPA 60
MPP-13120 (TAP525A) 60
MPP-12120 (TAP150A/MESP-RC) 60
MESP/SCM-PIT 110

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Top 10 Contributor
280 Posts
Points 6,221
Bruker Employee
Reply
Answered (Verified) Bede Pittenger replied on Mon, Sep 12 2011 12:56 PM
Verified by brownka

Deflection sensitivity depends on:

  1. The shape of the laser spot when it hits the PSD (how does the response change as a function of spot position)
  2. The length of the cantilever and how it bends along its length (since we are using an optical lever, this determines how much the spot moves)
  3. The geometry and electronics of your particular AFM

There are a lot of different probes used for Contact Mode and Tapping Mode, but below are some estimates (for air).  Don't be surprised if you see variations of 20-30% from these numbers:

ScanAsyst-Air 60
ScanAsyst-Fluid 30
SNL-A 60
SNL-B 110
SNL-C 60
SNL-D 110
TESPA 60
MPP-13120 (TAP525A) 60
MPP-12120 (TAP150A/MESP-RC) 60
MESP/SCM-PIT 110

Top 500 Contributor
2 Posts
Points 22
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brownka replied on Mon, Sep 12 2011 4:11 PM

Thanks that's quite helpful. Looks like I'll have to revisit my methodology.

Cheers,

Keith

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