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  • Re: Sample roughness and appropriate probe...

    Dear Mariam, How stiff (ballpark) is your ceramic sample? When you say the roughness is 0.5-2um what is the scan size that gives you that roughness? If you want to measure the modulus of a stiff sample, you must use a stiff cantilever. Question 1 will allow you to look in the manual and find the recommended...
    Posted to SPM Digest by Bede Pittenger on Wed, Jun 12 2013
  • Re: Cantilever selection for measuring adhesion force

    You should choose a cantilever that is sensitive as possible, but does not cause the deflection measurement to saturate or become non-linear. The force is the spring constant times the deflection sensitivity times the detector voltage (F=K*Sd*V). If we know K for a given probe type and we know the approximate...
    Posted to SPM Digest by Bede Pittenger on Mon, Jun 10 2013
  • SINGLE-WALLED CARBON NANOTUBE PROBES FOR AFM IMAGING

    This paper discusses fabrication and characterization of single-walled carbon nanotube (SWNT) AFM probes. By selectively deposit catalytic nanoparticles onto commercial AFM probes with silicon tips, we are able to grow SWNTs in the wafer scale, with 30-50% usable probe yield. We also discuss in detail...
    Posted to Brochures & Data Sheets by Stephen Minne on Thu, Apr 14 2011
    Filed under: nanotube, tips, Probe
  • Re: Does the chips thickness of the AFM probe chip affects the laser alignment?

    Oliver, The cantilever die thickness very much effects the performance of the optical system in the AFM. In most cases, the cantilever holders are designed with the expected chip thickness in mind. For example, since most air levers are silicon (and made on 300um substrates) the air cantilever holders...
    Posted to SPM Digest by Stephen Minne on Fri, Dec 3 2010
  • Re: Tip selection for PFT-QNM

    For general purpose imaging we recommend ScanAsyst-AIR probes because their low spring constants and sharp tips provide the best high-resolution imaging on soft samples without damaging tips or samples. To enable quantitative modulus mapping, some deformation of the sample is necessary. For stiffer samples...
    Posted to SPM Digest by Bede Pittenger on Wed, Mar 3 2010
  • Probing DNA-Protein Interactions with Atomic Force Microscopy

    Large, multi-component protein assemblies are involved in many DNA transactions such as recombination, replication, transcription, and repair. In order to progress in the understanding of different key steps of these mechanisms, it is imperative to analyze the structure of the DNA-protein complexes involved...
    Posted to Application Notes by BrukerApplications on Mon, Jan 4 2010
    Filed under: AFM, Tapping Mode, DNA-Protein, RNA, Probe
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